Kingdom—Monera: It comprises unicellular, prokaryotic organisms, having no well-defined nucleus and no organelles.
Why was kingdom has only cells without a nucleus?Kingdom—Monera: It comprises unicellular, prokaryotic organisms, having no well-defined nucleus and no organelles.
The kingdom Plantae includes organisms that range in size from tiny mosses to giant trees. Despite this enormous variation, all plants are multicellular and eukaryotic (i.e., each cell possesses a membrane-bound nucleus that contains the chromosomes).
Prokaryotes are organisms which do not have a membrane bound nucleus and cell organelles. All prokaryotes are placed under the kingdom Monera. Example: Bacteria.
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all of the following are abiotic factors within an ecosystem except . all of the following are abiotic factors within an ecosystem except . energy nutrients fire all of the above are abiotic factors.
All of the following are abiotic factors within an ecosystem except Energy. Energy is not an abiotic factor within an ecosystem.
Abiotic factors are non-living components within an ecosystem that play a crucial role in determining the survival and growth of living organisms. These factors include things like temperature, light, water, soil, air, and nutrients. Fire is also considered an abiotic factor as it can affect the physical and chemical properties of the environment, leading to changes in the ecosystem.
However, energy is not considered an abiotic factor as it is not a physical component of the environment. Energy is a fundamental component of life and is essential for the survival and growth of living organisms, but it is not considered a part of the abiotic factors within an ecosystem.
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Complete Question:
all of the following are abiotic factors within an ecosystem except _____.
a) energy
b) nutrients
c) fire
d) all of the above are abiotic factors.
I need help explaining and answering
Scientists prefer to see this information through graph as the information in a graph is more accurate than the data table. The correct option is A.
What is a menstrual graph?You can learn more about your body's monthly cycle by keeping a daily journal of your menstrual cycle and periods.
The menstrual chart can be used to track the phases and variations in your cycle and identify the indicators of your upcoming period.
Menstruation, the follicular phase, ovulation, and the luteal phase are the four stages of the menstrual cycle.
Since following the menstrual cycle and being aware of fertile days can be used as a type of contraception and as a way to plan pregnancy, the menstrual cycle is crucial to intimate wellness.
Scientists prefer to see this data via graph since it provides more accurate information than a data table.
Thus, the correct option is A.
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which of the following is a characteristic of enhancer sequences in eukaryotic cells? specific transcription factor binding at an enhancer inhibits transcription by reducting rna polymerase ii activity. they occur only upstream of the gene. they can only be in one orientation. enhancer function is dependent on recognition by a specific transcription factor.
The one that is characteristic of enhancer sequence in eukaryotic cells is that the enhancer function is dependent on recognition by a specific transcription factor. Therefore, the correct answer is the last option.
Enhancer sequence is regulatory DNA sequenced that enhances the transcription of an associated gene when bound by specific proteins (called transcription factors). Enhancer's orientation doesn't affect its function; it may even be reversed and still does its function properly.
Enhancer sequences are generally located away from their gene, either upstream or downstream from the starting site. They may also be at various distances from their promoter.
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which of these is not a reason why mitosis is important?
A. growth
B. Repair
C. Passing on of genetic information
D. none of the above.
Answer: The answer is B.
Explanation:because growth and passing on of genetic information is super helpful for the embryo.
D.
Mitosis is responsible for replacing cells, the growth of our bodies and carries the genetic information of the parent.
In India−where DDT resistance first appeared−natural selection would have caused the frequency of resistant mosquitoes to increase over time. If resistant mosquitoes then migrated from India (for example, transported by wind or in planes, trains, or ships) to other parts of the world, the frequency of DDT resistance there would increase.
DDT was first used as an insecticide in the 1940s and quickly became widespread in many parts of the world, including India. In response to the widespread use of DDT, populations of mosquitoes in India began to evolve resistance to the insecticide.
This occurred due to the process of natural selection, where the mosquitoes with genes for resistance to DDT were more likely to survive and reproduce than the mosquitoes without these genes. Over time, this resulted in an increase in the frequency of DDT-resistant mosquitoes in India.
Once DDT resistance had evolved in mosquitoes in India, it could spread to other parts of the world through migration. Mosquitoes are capable of long-distance migration and can be transported by wind, as well as through human activities such as air travel, shipping, and other forms of transportation. If DDT-resistant mosquitoes from India migrated to other parts of the world, they would introduce the resistance genes into new populations, causing the frequency of DDT resistance to increase in these areas as well.
In conclusion, the frequency of DDT resistance in mosquitoes increased in India due to natural selection and then spread to other parts of the world through migration, leading to the widespread occurrence of DDT resistance in mosquitoes globally.
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what is the function of heart valves, and why is this important?
The function of heart valves is to prevent the back flow of the blood and it is important because it ensure the flow of blood in correct direction.
Heart valve are structures in the heart that regulate the inflow of blood throughout the body. They open and close in sequence to insure that blood overflows in the correct direction and at the right pressure. This is important because it keeps the blood flowing in the right direction and ensures that the heart is working efficiently. Without the valve,
The heart would be unfit to pump blood duly and would not be suitable to supply oxygen to the body’s cells. The valve also help to keep the pressure within the heart at a safe position, precluding it from getting too high or too low. Without the valve the heart would be unfit to serve duly and would be unfit to supply the body with the oxygen and nutrients it needs.
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Which group contains mostly unicellular, eukaryotic organisms?
Bacteria
Protists
Animals
Fungi
Plants
Which is correct ^ please help
Answer: Protists
Explanation:
Protists
I’ll make u brainliest to whoever helps me first
The various pieces of evidence to support evolution include:
Evidence from FossilsComparative anatomy Comparative embryologyEvidence from biogeographyEvidence from DNAAll the birds are related in that they have a similar structure but are variously adapted to the environment in which the birds can be found.
What are adaptations?The definition of adaptation is "the process through which a species or an organism gradually improves its acclimation to its environment." An animal's ability to adapt to its habitat can take the form of behavioral or physical characteristics.
Organisms undergo evolution as a form of adaptation.
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if you were to analyze the source of the genetic material in an angiosperm endosperm, what ratio of maternal to paternal material would you find?
Answer: 2:1
Explanation:
To analyze the source of the genetic material in an angiosperm endosperm the ratio would be 2:1
Any of the roughly 300,000 species of flowering plants, known as angiosperms or flowering plants, make up the largest and most diverse subgroup of the Plantae kingdom. About 80% of all currently living green plants are known to be angiosperms. The fertilized ovule (egg) develops into a seed in an enclosed hollow ovary in the angiosperms, which are vascular seed plants. The angiospermous plant part that houses the male or female reproductive organs, or both, typically has an ovary that is enclosed in a flower. The angiospermous plant's developing floral organs give rise to fruits, which are distinctive to angiosperms. Contrarily, in gymnosperms, the other major vascular seed plant group (including conifers and cycads), the seeds do not grow enclosed withinTo know more about Angiosperm here
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If a female Drosophila carries a bicoid mutation in one allele (bicoid+/-), what % of her eggs will be absent of bicoid mRNA? A) 100% B) 50% C) 25% D) 0%
50% of the female drosophila carries the by cold mutation in one allele in the absence of her eggs which is absent of bicoid mRNA so the correct option is B.
Bicoid mRNA is special type of runner RNA that's responsible for the conformation of the body axis of an embryo in the fruit cover species, Drosophila melanogaster. The Bicoid mRNA is also restated into protein, which binds to the DNA of the nexus and causes the expression of certain genes in the early embryo.
This results in the conformation of the body axis, as the Bicoid protein is expressed more at the anterior end of the embryo and lower at the posterior end.
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The image below shows a Rocky Mountain iris. This type of flower has stripes called nectar
guides. These stripes help bumble bees find the flower's nectar.
What is the most likely function of the nectar guides described above?
Choose 1 answer.
to increase the plant's chance of being pollinated
to help the plant's seeds be dispersed
to prevent bees from damaging the flower
A would be your best choice
In cats short hair is dominant over long hair; the gene involved is autosomal (that is, not on the sex chromosomes). An allele, B1, of another gene, which is sex-linked, produces yellow coat color; the allele B2 produces black coat color; and the heterozygous combination B1 /B2 produces tortoiseshell (calico) coat color. If a long-haired black male is mated with a tortoiseshell female homozygous for short hair, what kind of kittens will be produced in the F1? If the F1 cats are allowed to interbreed freely, what are the chances of obtaining a long-haired yellow male?Please show some work if give an explanation.
The F1 cats are allowed to interbreed freely, what are the chances of obtaining a long-haired yellow male father may have 25% (1/4) of gametes with both the Y and the s whereas mother have 50% (1/2) of [tex]B^{2} B^{1} Ss[/tex] genotype therefore, (aa gamete probability ---> ¼) chances of long-haired yellow male are 1 x 1/4 x 1/2 x 1/4 = 1/32.
The genotype of long-haired black male ---> [tex]B^{2} Y[/tex] ss
The female genotype ----> [tex]B^{1} B^{2} SS[/tex]
These are sex-linked so that gametes are [tex]B^{2} s[/tex] or Ys from father whereas from mother [tex]B^{1} S[/tex] or [tex]B^{2} S[/tex]
There are total 4 types of offspring in which female offspring ---> tortoiseshell/shorthair or black/shorthair --> 50% probability; whereas males could be yellow/shorthair or black shorthair with 50% probability.
Probability is a quantitative technique in genetics that lets us forecast the possibilities of an offspring inheriting a certain characteristic of interest. During the production of gametes through the process of meiosis in diploid organisms, each chromosome has a 50% chance of being passed on to the gamete.
In genetics, calculating probabilities is critical. Probabilities indicate the possibility that certain occurrences, such as the inheritance of a specific characteristic in an organism, will occur. This can assist plant and animal breeders in developing more appealing traits in their goods.
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which classes of neurons are have a low probability of being be able to repair themselves after damage in an adult human?
Classes of neurons that have a low probability of being able to repair themselves after damage in an adult human are interneurons in the spinal cord and interneurons in the brain.
Interneurons are nerve cells that function to connect sensory neurons and motor neurons. Interneurons have short dendrites and long axons.
In cases of damage to the brain and spinal cord, many axons are cut. It is difficult for axons to grow back. This is why paralysis and loss of sensation are permanent in spinal cord injuries.
There are two reasons why axonal regeneration in the CNS fails. First, because the environment surrounding the CNS lesion inhibits axon outgrowth; and second because most CNS axons elicit only a weak regenerative response after being cut.
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which substance does not promote inflammation
Substance that does not promote inflammation: Anti-inflammatory agents
Anti-inflammatory agents are substances that can help reduce inflammation, which is a response to injury or infection in the body. Inflammation is a natural part of the body's immune response, but excessive or chronic inflammation can contribute to a variety of health problems, such as arthritis, heart disease, and cancer.
Anti-inflammatory agents include medications like nonsteroidal anti-inflammatory drugs (NSAIDs) and corticosteroids, as well as natural compounds like omega-3 fatty acids and certain vitamins and minerals.
These agents help to reduce inflammation by blocking the production of certain chemical signals that stimulate inflammation, or by suppressing the activity of immune cells that are involved in the inflammatory response. By reducing inflammation, anti-inflammatory agents can help to alleviate symptoms and improve overall health.
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Pa help po pls... I really need help po. I'll mark brainliest who answered po.
VOLCANIC ERUPTION:
People must work together and assist others in evacuating to a safer location. Explain.
When enough magma builds up in magma chamber, it forces its way up to the surface and then erupts, causing volcanic eruptions.
What do you understand by a volcanic eruption?Volcanic eruption is when the lava and gas are released from volcano and sometimes explosively. Most dangerous type of eruption is called 'glowing avalanche' which happens when freshly erupted magma flows down the sides of volcano. They travel quickly and reach temperatures of up to 1,200 degrees Fahrenheit.
In the ocean, volcanoes erupt along the cracks that are opened in the ocean floor by spreading of the two plates called as the mid-ocean ridge.
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how endotherms and ectotherms compare in their metabolic rates per gram? how does this change their organismal and tissue-level physiology?
The endotherms have higher metabolic rates per gram as compared to the ectotherms. This causes change in physiology such that they have higher breathing and heart rates. Also, they have higher mitochondria numbers per gram of tissue.
Endotherms are the organisms that can maintain a constant body temperature inside, unaffected by the temperature outside. They are also called warm-blooded animals. The examples include: mammals and birds. The opposite of endotherms are the ectotherms who cannot maintain a constant body temperature.
Mitochondria is the double membranous cell organelle present in all the eukaryotic cells. it is responsible for synthesizing ATP for the cells which is required to carry out all the life functions.
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Bubonic plague, a disease that killed millions of people in the Middle Ages is caused by Yersinia pestis, a bacterium transmitted by fleas. How is a virus like hantavirus similar to, and different from, a bacterium like Yersinia?
The similarity between bacteria and virus is that both can cause diseases and are spread through air droplets, contaminated surfaces and may cause general symptoms like sneezing, fever, etc. The difference between them is that bacteria is living outside any living body but a virus is not.
Bacteria are the microorganisms that are single-cellular and can be present in any environment. They may be both harmful as well as useful. The bacteria exist is a variety of shapes and sizes. They are the first life forms of Earth.
Viruses are the acellular structures that are living only inside a living body. They do not follow the cell theory. They can divide and multiply their numbers by using the mechanism of the host body they are present in.
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4. When discussing comparative morphology, what do scientists compare between modern organisms and their extinct relatives?
timeline
DNA
anatomy
environment
When discussing comparative morphology, scientists compare between modern organisms and their extinct relatives is Anatomy.
What is the comparison of comparative morphology?Comparative morphology is the study of the patterns of the location of structures within an organism’s body plan, which serves as the foundation for taxonomy classification. The study of the link between the structure and function of morphological traits is known as functional morphology. Fossils. Fossils provide evidence of the presence of now-extinct ancient species that are connected to modern ones. Simple observation. Small-scale evolution can be observed directly in species with brief lifecycles (e.g., pesticide-resistant insects).
Simply said, morphological categorization employs physical traits (or characters) that are comparable to determine species borders and connections between species. Characters might be qualitative (e.g., presence or absence) or quantitative in nature (e.g., size or number).
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write the letter of the food commonly linked with each pathogen. you will use food items more than once and some may not be used at all. some pathogens are linked with more than one food.
The letter of the food commonly associated with each pathogen, is:
Hepatitis A, related food is Shellfish, Ready-to-eat-food, and Contaminated water. The correct letters are: E,F,and J.Norovirus, related food is Shellfish, Ready-to-eat-food, and Contaminated water. The correct letters are: E, F and J.Salmonella Typhi, related food is Beverages and Ready-to-eat food The correct letters are: A and F.Shigella spp, related food is Produce and Contaminated water. The correct letters are: G and J.Enterohemorrhagic and shiga toxin-producing escherichia coli, related food is Meat and produce. The correct letters are: C and G.Foodborne illnesses are caused by consuming food or beverages contaminated with various pathogens. These pathogens can be bacteria, viruses, fungi, parasites, or even toxins.
Common sources of foodborne illness include contaminated water, raw or undercooked meats, shellfish, ready-to-eat foods, unpasteurized juices, and unwashed produce.
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is it possible to find Permian rocks beneath devonian rocks
Yes, it is possible to find Permian rocks beneath Devonian rocks as rock formations can be layered and stacked on top of each other over time through geological processes such as uplifting, subsidence, and erosion.
What does rock deposition entail?Deposition is the act of depositing sediment that has been carried by the wind, water, sea, or ice. Pebbles, sand, mud, and salts that have been dissolved in water can all be used to convey sediment.
Sea - level changes caused the deposition of Permian shales, sandstones, siltstones, limestones, sands, marls, and dolostones. The rock strata show these fluctuation cycles.
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How can naturally occurring events disrupt the cycling of essential
building blocks, such as carbon, nitrogen, and oxygen?
Answer:
Naturally occurring events can disrupt the cycling of essential building blocks such as carbon, nitrogen, and oxygen in a number of ways. For example, floods, fires, and other natural disasters can cause the release of large amounts of these elements into the atmosphere or into bodies of water, where they can be carried away and not returned to the original ecosystem. Additionally, changes in climate can cause changes in the availability of certain elements, leading to disruptions in the cycling of these elements. Finally, changes in land use can cause soil erosion, which can also disrupt the cycling of essential building blocks.
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Events such as wildfires, volcanic eruptions, and climate change can disrupt the cycles of carbon, nitrogen, and oxygen. Wildfires release carbon into the atmosphere, volcanic eruptions can alter the nitrogen cycle, and climate change affects the balance of gases, including oxygen.
Explanation:Naturally occurring events, such as wildfires, volcanic eruptions, and climate change, can disrupt the cycling of essential building blocks. For example, wildfires release a large amount of carbon into the atmosphere, disrupting the carbon cycle. Volcanic eruptions can release nitrogen and sulfur compounds which can alter the nitrogen cycle. Similarly, climate change, caused due to anthropogenic activities, can change the balance of gases in the atmosphere, thereby affecting the oxygen cycle.
Take a forest ecosystem for instance. In a normal scenario, the forest acts as a carbon sink, absorbing carbon dioxide from the atmosphere and storing it in the form of biomass. However, in the event of a wildfire, the same forest can turn into a carbon source, releasing stored carbon back into the atmosphere.
Volcanic eruptions, by releasing nitrogen and sulfur-based compounds, can result in acid rain. This acid rain can alter soil composition, affecting its ability to cycle and fix nitrogen thereby impacting plant growth and health. Besides, climate change induced by the increase in greenhouse gases can disrupt the balance of oxygen in the seawater affecting marine life's oxygen intake, disrupting the oxygen cycle subtly.
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Suppose a pigeon breeder finds that about one fourth of the eggs produced by one of his prize pairs do not hatch. Of the young birds produced by this pair, two thirds are males. Give a possible explanation for these results. (Remember the mechanism of sex determination in birds.)
The remaining genotypes can be - ZZ, ZW, ZZ.
The mechanism of sex determination in birds is different from human. In birds, the sex chromosomes are designated as Z and W.
Male is the homomorphic sex (ZZ) and female is the heteromorphic sex (ZW).
Pair : Male bird (ZZ) × Female bird (ZW)
Gametes : Z, Z (from male) Z, W (from female)
In birds, internal fertilisation takes place. Eggs develop inside the female bird. So the genotypes in the eggs can be:
ZZ, ZW, ZZ, ZW (i,e. there is equal chance for male and female).
Lets assume that the one fourth eggs which don't hatch will be of genotype ZW (female).
Then then the remaining genotypes can be - ZZ, ZW, ZZ (i.e. two thirds of them are male with ZZ genotype).
Bird sex is established by the inheritance of sex chromosomes during fertilization. The embryo with two Z chromosomes (ZZ) grows into a male, whereas the embryo with two Z and W chromosomes (ZW) develops into a girl.
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In a cladogram - A the most ancient organisms called the origin are found at the very base of the tree diagram
In cladogram, the most ancient organisms, called the origin, are found at the very base of the tree diagram. The correct option is A.
What is cladogram?In cladistics, a cladogram is a diagram that is used to depict relationships between species.
However, because a cladogram does not depict the relationships between ancestors and offspring, it is not the same as an evolutionary tree.
Cladograms provide a framework for comprehending the rate of evolution of groupings of animals as well as the relationship between their evolutionary history and the planet's changing climate and geography.
The oldest living things, or origin, are located at the very bottom of the tree diagram in cladograms.
Thus, the correct option is A.
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Your question seems incomplete, the missing options are:
A. the most ancient organisms, called the origin, are found at the very base of the tree diagram
B. the closer the branch point is to an organism, the more distantly related those organisms are
C. neither A nor B is true
D. both A and B are true
How many genes are needed to control a trait
that uses simple inheritance?
A. only one
B. millions
C. more than 50
Answer:
A
Explanation:
which of the following is a strategy associated with conservation biology? exploring the interdependence of species within ecosystems on a global scale. monitoring and evaluating groundwater quality in a formerly contaminated site. re-establishing a native species of pine tree in an area used previously by loggers. designating a nature reserve to protect an endangered wildcat species.
All of the following are strategies associated with conservation biology:
Exploring the interdependence of species within ecosystems on a global scale.Monitoring and evaluating groundwater quality in a formerly contaminated site.Re-establishing a native species of pine tree in an area used previously by loggers.Designating a nature reserve to protect an endangered wildcat species.Conservation biology is the scientific study of the preservation of biological diversity and the management of threatened species and ecosystems. It encompasses various approaches and techniques aimed at conserving biodiversity and preserving the health of the planet's ecosystems. This field of study considers both the biological and ecological factors that threaten species and ecosystems, as well as the social and economic factors that drive conservation efforts.
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the is made up of ependymal cells and secretes cerebrospinal fluid into the . a. thalamus, superior sagittal sinus b. septum pellucidum, subdural space c. choroid plexus, subarachnoid space d. choroid plexus, subdural space e. third ventricle, cavernous sinus
c. choroid plexus, subarachnoid space. The choroid plexus secretes cerebrospinal fluid into the subarachnoid space.
The choroid plexus is a construction in the mind that helps produce cerebrospinal liquid (CSF). This liquid streams all through the mind and spinal rope, offering help and assurance. The choroid plexus is comprised of exceptional cells called ependymal cells. These phones produce CSF and discharge it into the encompassing space called the subarachnoid space. The subarachnoid space is a liquid filled region that encompasses the mind and spinal line, assisting with padding and safeguard these significant designs. Thus, the choroid plexus is a significant piece of the cerebrum's framework for delivering and keeping up with cerebrospinal liquid.
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18) to get a plate with 100 colonies on it, how much must you dilute a bacterial culture with an o.d.500 of 0.15? assume that you plate 0.1 ml, and that o.d.500
A group of bacteria, fungus, and other microorganisms grown on a solid agar medium is referred to as a "colony" in the field of microbiology.
The cells that are plated on this medium develop into a mass that can be replicated for additional usage in the lab.
A test to determine whether you have a bacterial infection is a bacterium culture. A sample of blood, feces, urine, skin, mucus, or spinal fluid may be used for the test. A healthcare professional can choose the most suitable course of therapy using this kind of test to determine what brought on the infection.
The basic components of a culture medium are water and nutrients, to which various growth factors that are unique to each bacterium and required for its growth must be added.
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describe the system of lymph vessels (flow of lymph). explain how lymph is kept moving in the vessels.
The lymphatic system is an interconnected system of tissues, blood arteries, and organs that transports lymph, a colorless, watery fluid, back into your circulatory system. At the intersection of the left internal jugular and subclavian veins, the lymphatic fluid finally empties.
There are microscopic tubes called lymph capillaries, also known as lymphatic capillaries, all over your body. A capillary is a small tube with a hair-thin inner diameter. Similar to blood capillaries, lymphatic capillaries differ in that they are larger in diameter and have closed ends. Lymph capillaries function similarly to blood capillaries, however they do not let fluid to leave the cell via the cell walls. It is only capable of progress. Your lymphatic system includes lymphatic capillaries. Nearly every organ in your body has lymphatic tissue, organs, and veins that collect surplus fluid. Lymph capillaries assist in maintaining your body's overall fluid balance. Interstitial fluid, which is fluid that fills the crevices between cells, seeps into your tissues from blood capillaries all throughout your body.
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The complete question is:
Describe the system of lymph vessels. Explain how lymph is kept moving in these vessels. Into which veins is lymph emptied?
Which pair of molecules are products of aerobic and anaerobic cell respiration in some organisms?
A. oxygen, pyruvate
B. lactate, adenosine triphosphate
C. carbon dioxide, glucose
D. adenosine triphosphate, carbon dioxide
D). Adenosine triphosphate (ATP), carbon dioxide.
correct option is d
Adenosine triphosphate (ATP), carbon dioxide are the products of both aerobic and anaerobic cell respiration in some organisms.
During aerobic respiration, glucose is oxidized with the help of oxygen, producing ATP and carbon dioxide as the end products.
In contrast, anaerobic respiration takes place in the absence of oxygen, and the end products are ATP and either lactic acid (lactate) or ethanol and carbon dioxide, depending on the organism.
The type of respiration that takes place in a cell depends on the availability of oxygen, the metabolic needs of the cell, and the physiological adaptations of the organism.
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Specialized horizontal underground stem found in ferns. What is a rhizome?
Answer:
It is an specialized horizontal underground stem found in ferns.
Explanation:
Answer
horizontal underground plant stem capable of producing the shoot and root systems of a new plant.
