The organism that is categorized by scientists is called Archaea. Asexual reproduction is the function of binary fission in prokaryotes. The straightforward method by which prokaryotes divide and multiply is known as binary fission.
The earliest single-celled microbes on Earth are prokaryotic cells. Bacteria and archaea are prokaryotes. Cyanobacteria are among the prokaryotes that carry out photosynthesis. Since a prokaryotic cell only has one membrane, all processes take place in the cytoplasm.
Numerous factors, including general similarities, colors, ecological roles, etc., can be used to categories organisms. But it is generally acknowledged that classifying organisms based on their shared evolutionary history provides scientists with the most helpful way to organize biological variety.
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a microbiologist wants to estimate the concentration of a certain type of bacterium in a waste-water sample. she puts a 0.5 ml sample of the wastewater on a microscope slide and counts 39 bacteria. estimate the concentration of bacteria, per ml, in this wastewater, and find the uncertainty in the estimate.
The uncertainty of getting bacterial concentration in wastewater is pretty low as wastewater contains more bacteria and number of bacteria in per ml is 7.8
Estimating the microbial concentration in a sample is determined by various methods like - pour plating, spread plating and serial dilution. In estimation of microbial concentration, we need nutrient broth and an inoculum (a sample from where the sample will be taken and inoculated).
In the given condition we have 0.5 ml of sample and the microscopic counts of 39 bacteria at a time.
Therefore, for the number of bacteria = 39 and
solution = 0.5ml.
39/0.5 = 7.8
Therefore, the number of bacteria per ml of solution is 7.8
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Tavon wants to conduct a survey asking parents about their spending habits for their children.
Tavon should adhere to responsible ethical practices in his research. Which one of the following behaviors must be completed?
A. Tavon must record the names and ages of the children.
B. Tavon must pay the parents with money or a gift card for their time.
C. Tavon must see the parents' bank records to make sure they are telling the truth.
D. Tavon must keep the families' names in the study confidential and private.
Answer:
D
Explanation:
A. would infringe on safeguarding and ethical grounds
B. not adhering to ethical guidelines, no guarantee for confidentiality
C. would also infringe on safeguarding and ethical grounds
What is one major difference between Semaeostome and Rhizostome jellyfish?
One significant distinction between Semaeostome and Rhizostome jellyfish is the medusa shape of the various rhizostome.
what is Medusa form?One of the two main body forms seen in members of the invertebrate animal phylum Cnidaria is the medusa in zoology. It is the jellyfish's usual shape. The bell- or umbrella-shaped medusoid body. The manubrium, a stalk-like structure with the mouth at its apex, hangs downward from the center.
Describe invertebrate?An creature without a backbone is called an invertebrate. In fact, invertebrates lack all skeletal structure. You could be familiar with invertebrates such as spider, worms, snails, lobsters, and butterflies. However, vertebrates include people and other creatures with backbones.
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which one of the following is most associated with an air-pollution disaster like the one in 1948 in donora, pennsylvania? a. high winds b. temperature inversion c. increased industrial production d. shutdown of a power plant
Temperature inversion causes air pollution disasters like the one that occurred in Donora, Pennsylvania, in 1948. (option b).
Is it comfortable or frigid at 60 degrees?Is 60 degrees warm or chilly, you might be wondering. 60 degrees is typically considered to be mid-temperature. 60 degrees is roughly in the midpoint of the US's temperature range, which extends from below negative to over one hundred.
Is 65 degrees too chilly for a home?Your apartment or home might not be warm enough just to keep you safe even if you keep it between 60°F and 65°F. If you live alone, this is a particular issue because no one else will feel how cold the house is or detect if you are showing signs of hypothermia.
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normally, proteins of large molecular size are not present in urine. increased amounts of proteins may appear as a result of kidney diseases in which the glomeruli are damaged or as a result of .
Because of high blood pressure or from injury to the glomeruli.
Why do proteins typically not appear in urine samples?There is protein in the blood, but healthy kidneys should only remove very little amounts (traces) of it through the filters into the urine (glomeruli). Protein loss in the urine is not typical.
What are the proteins found in typical urine?You typically have a very small amount of protein in your urine. If your urine contains a lot of protein (proteinuria), your kidneys may be the source of the issue. Your kidneys are a set of organs that purify surplus water and waste from your blood to create urine.
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What plant(s) are unique and/or rare in the temperate rainforest (20 points)
The Giant Water Lilies, the Rafflesia and the Nepenthes are some rare and unique plants found in the temperate rainforests.
What are these rare/ unique plants?
The great water lilies also known as the Victorian Amazonica is a type of water lily native to the rainforests of the Amazon Basin in South America. Victoria amazonica is one of the largest and most beautiful plants in the world and can reach up to 3 meters in diameter. The flowers are white with pink stripes and are about 1 meter in diameter. It is also known as ‘Queen of the Night’ as it only blooms at night and stays only for about 48 hours.
Rafflesia, also known as Corpse Flower is a flower of the parasitic plant. It contains no stems or leaves to produce food, instead growing from the vine it feeds on. This is the largest flower in the world, around three feet wide. Its survival depends on deception. It mimics a mammalian corpse, from its texture and color to its odor of rotting flesh. It is found in the rainforests of Southeast Asia, especially in Indonesia, Malaysia, Thailand and Vietnam.
Nepenthes also known as Monkey Cups, are pitcher plants, found mostly in tropical environments of the world. It is a carnivorous plant and eats small animals for nutrients, by luring them into its pitcher shaped trap by using its sweet nectar.
Other rare plants found in temperate forests are the Jabuticaba Tree, the Durian Fruit, Balsa Tree, passion flower, etc.
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(Decreases, increases)
(Under the surface, in the atmosphere)
(Decreases, increases)
(Under the surface, in the atmosphere)
When humans burn the fossil then it increases the amount of carbon that is stored under the surface and increases the amount of carbon flowing in the atmosphere, This is totally like burning of fuels and combustion.
What is combustion ?It is defined as the process which involves the burning of carbon sources and it is of two types that is complete and incomplete.
When the fossil fuels such as petroleum, natural gases and fuel with the coal as well is burned out in atmosphere then in this condition it obviously increases the amount of carbon out in nature and decreases the carbon availability down the Earth.
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nicotine acts in the brain by 1. enhancing gaba's inhibitory effects. 2. increasing serotonin reuptake. 3. first stimulating and then blocking cholinergic receptors. 4. reducing blood flow to the cerebral cortex.
Nicotine mainly shows its action through specific nicotinic acetylcholine receptors located in the brain. It stimulates presynaptic acetylcholine receptors thereby enhancing Ach release and metabolism.
The dopaminergic system is also stimulated by it and thus increasing the concentration of dopamine in nuclear accumbens. Nicotine induces GABA release by binding to excitatory nACh receptors located on presynaptic GABA neurons.
The serotonergic system may be involved in smoking behaviour because nicotine increases the brain's serotonin secretion, nicotine withdrawal decreases serotonin levels and a selective serotonin reuptake inhibitor antagonises the response to nicotine.
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Tilapia prefer water with a dissolved oxygen concentra-
tion of at least 3 ppm so that the oxygen will diffuse
from the water (higher concentration) into the fish
(lower concentration). Imagine you are an AgWorks in-
tern, and you test the dissolved oxygen level of the
tilapia tank. You read a result of 1 ppm.
Answer the following questions that describe why this
test result is a concern for the tilapia.
1. Explain if the level of dissolved oxygen level of 1 ppm
is too high or too low
2. In what direction will the oxygen will travel across the
cell membranes of the fish - from the water into the
fish-or- from the fish into the water
3. What is the type of cellular transport that is taking place
if the oxygen travels across the cell membranes from
high concentration to low concentration - simple
diffusion, active transport or osmosis
1.A 1 ppm level of dissolved oxygen is too low.
2.The oxygen will cross the cell membrane toward the direction of the fish.
3.If oxygen moves from a high concentration to a low concentration across the cell membranes, osmosis is the type of cellular transport that is occurring.
Is osmosis the same as active transport?Water molecules diffuse through a semi-permeable membrane during osmosis as they travel along a concentration gradient. Moving a substance up or down a concentration gradient is called active transport.
Osmosis is a type of passive transport where water molecules move from a high water concentration to a low solute concentration or vice versa through a membrane that is impermeable to the solute. Passive transport is referred to as "facilitated diffusion."
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How is meiosis similar to mitosis?
Both produce two daughter cells.
Both occur in somatic cells.
Both involve two divisions of a cell.
Both are forms of cell reproduction.
Answer:
both are forms of cell reproduction
Explanation:
meiosis makes 4 unidentical daughter cells
mitosis makes 2 identical daughter cells
not A
somatic only occurs in mitosis, not meiosis
not B
mitosis makes body cells, meiosis makes sperm and egg cells, both a type of cell division but mitosis does it only once, meiosis has two divisions or does it twice.
not C
meiosis is sexual reproduction
mitosis is asexual reproduction
both forms of cell reproduction therefore,
it's D :)
(can go more indepth if needed)
when observing the reactions within eukaryotic transcription you find there is a greater energy expenditure and several more enzymes and transcription factors than within prokaryotic transcription. the best explanation for this is that
The best explanation for when we observe the reactions within eukaryotic transcription as there is a greater energy expenditure and several more enzymes and transcription factors than within prokaryotic transcription.
Transcriptional elements in eukaryotes can be found far from the transcription start site because DNA is complex with chromatin in these organisms. Because transcription and translation occur at different physical locations, eukaryotic gene expression is more complex than that of prokaryotes. Eukaryotic cells can control the expression of genes at a variety of levels.
Translation starts off while the mRNA is still being created in a prokaryotic cell because transcription and translation are coupled. Although eukaryotes have a membrane-bound nucleus, prokaryotes and eukaryotes carry out transcription in essentially the same way.
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Two hundred students were surveyed to find out what color to use for the school uniform. The results of the survey are shown in the following graph. What percent of students chose the color red? A. 12% B. 8% C. 32% D. 40%
juan studies for his biology class each day. he generally reviews material covered previously as well as the new material. he does this instead of cramming the night before the test and finds he has better retention and does better on the exams. which technique is juan using?
Juan is using Ebbinghaus' retention curve technique.
The reduction in memory retention over time is predicted by the forgetting curve, also known as Ebbinghaus' retention curve. This curve illustrates how information deteriorates over time when no effort is made to keep it. The strength of memory is a related idea that describes how long memory traces last in the brain. It demonstrates how learnt knowledge gradually fades from our minds unless we take steps to keep it there. For instance, if your company has 10 customers at the beginning of the year and loses two of them, your retention rate is 80%.
Three different methods—recall, recognition, and relearning—are used by researchers to gauge forgetting and retention.
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thermogenesis refers to multiple choice the energy you require during sleep at night. shivering when hot and fidgeting. the inability to regulate body temperature. metabolic activity of brown adipose tissue, especially in hibernating animals.
The energy you require during sleep at night.
Shivering thermo genesis, a reaction to unexpected cold exposure, plays a significant role in increased heat generation. The method through which heat is produced via the calorigenic effect of nor epinephrine and epinephrine is known as no shivering thermo genesis,
What about thermo genesis?Thermo genesis, which takes place in specialized tissues such brown adipose tissue and skeletal muscle, is described as the disposal of energy through the generation of heat. The metabolic process through which organisms burn calories to produce heat is known as thermo genesis. The body generates heat through thermo genesis, to put it another way. Calorie "burning" does this. The energy required for the digestion, absorption, and elimination of consumed nutrients is known as thermo genesis or the thermic effect of food. The process through which organisms produce heat is known as thermo genesis. All warm-blooded creatures experience it, and a few thermogenic plant species like the Eastern skunk cabbage, the Voodoo lily (Sauromatum venosum), and the enormous water lilies of the genus Victoria also experience it. When combined with a healthy lifestyle, consuming a diet that contains these substances can aid in weight loss. In fact, studies suggest that taking thermogenic compounds can accelerate fat-burning by 10-16% and raise metabolic activity by 4-5%. For thermo genesis, energy balance, and metabolism, thyroid hormones (TH) are crucial. Simply told, you may assist your body burn more calories by enhancing thermo genesis, which also helps you increase your metabolism's rate. Increasing your daily energy expenditure is essential if you want to lose weight, maintain your current weight, or lose a few pounds.Learn more about thermo genesis here:
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in parts of asia, many fruit crops are pollinated by hand using feathers. this human method of pollination is used because
In parts of Asia, many fruit plants are pollinated by hand using feathers. This method of human pollination is used because the excessive use of pesticides has greatly reduced the bee population.
Pesticides are one of the results of modern technology that has an important role in improving people's welfare. Its use appropriately and safely is an absolute thing that must be done considering that pesticides are toxic substances. The wrong use of pesticides or their unwise management can have negative impacts, both directly and indirectly, on human health and the environment
The negative impact of excess pesticides can become dangerous pollutants for aquatic and terrestrial biota. Various wanted species were poisoned and then died. Different species of animals have different immunity. Some are sensitive, some are resistant. Young animals and larvae are animals that are sensitive to pollutants. Some animals can adapt so that they are immune to contaminants and some are not. Although animals are capable of adaptation, it must be recognized that there is a limit to the degree of adaptation of animals. If this limit is exceeded, the animal will die.
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you have discovered an organism that lives inside the gastrointestinal tract and does not contain a nucleus. based on what you know of cellular respiration, how does it obtain its energy?
an organism that lives inside the gastrointestinal tract and does not contain a nucleus. Based on cellular respiration, it obtains its energy through glycolysis.
Glycolysis is a series of reactions that converts glucose into two molecules of pyruvate, each with three carbons. Glycolysis is a metabolic pathway that has been around for a very long time and is used by the great majority of living things on the earth today.
In living things, the process of cellular respiration begins with glycolysis. However, since glycolysis doesn't require oxygen, a lot of anaerobic organisms—organisms that don't use oxygen—also have this pathway.
The complete question is:
You have discovered an organism that lives inside the gastrointestinal tract and does not contain a nucleus. Based on what you know of cellular respiration, how does it obtain its energy?
a. glycolysis and the citric acid cycle
b. photosynthesis and the citric acid cycle
c. glycolysis
d. photosynthesis
e. glycolysis, the citric acid cycle, and the electron transport chain
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explain how two similar species of birds are able to inhabit the same area and even nest in the same tree without occupying the same niche.
Two similar species employ mostly non-overlapping resources as a result of this type of evolution, and as a result, they occupy different niches. Resource partitioning is the term for this.
What does the word obstruct mean?blocked; prevented; prevents. transitive verb: to forbid doing anything; to maintain control: repress. : to prevent from free or unrestrained activity, especially by use of internal psychological forces or external social pressures.
What makes a person inhibited?Behavior, appearance, social relations, or a discussion topic are all examples of social inhibition. Social assessment worries, social anxiety, social avoidance, & withdrawal are related processes that address social inhibition.
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which of the following correctly describes one of the muscle types? a. cardiac muscle includes the heart and all of the muscles that the heart has an effect on. b. smooth muscle is the type of muscle that allows us to flex our limbs. c. hard muscle is the type of muscle responsible for contracting and extending. d. skeletal muscle is the type of muscle most people are most familiar with. submit
The sort of muscle that most people are most accustomed to is skeletal muscle. Skeletal muscles make up 30–40% of your body's overall mass.
What is the main function of skeletal muscle?Skeletal muscles are used by humans to move around and perform daily activities. They are essential to breathing mechanics and help maintain balance and posture. Additionally, they protect the vital organs of the body.
What is the composition of skeletal muscle?A single skeletal muscle might be made up of hundreds and even thousands of muscle fibers that have been bundled together and wrapped in connective tissue. Each muscle is covered by the epimysium, a sheath of connective tissue. Fascia, a connective tissue, surrounds and separates the muscles outside of the epimysium.
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a substance or part of a substance (living or nonliving) that is recognized as foreign by the immune system, activates the immune system, and reacts with immune cells or their products is a/an:
A substance or part of a substance that is recognized foreign by the immune system, activates the immune system, and reacts with immune cells or their products is antigen.
What are antigens?Any substance that the immune system can recognize and that can stimulate an immune response are called antigens. B lymphocytes are white blood cells that generate antibodies specific to the antigen that stimulated their production.
Antigen is a substance that is capable of stimulating an immune response, hence activating lymphocytes that are the body's infection-fighting white blood cells. Two main divisions of antigens that are recognized are: foreign antigens and autoantigens.
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what nerve stimulates the masseter and temporalis muscles to elevate the mandible during mastication and swallowing?
The mandible is raised during digestion and swallowing thanks to the Trigeminal Nerve's stimulation of the masseter muscles.
What causes a swallowing problem?a disease that affects your neurological system, such as dementia, multiple sclerosis, head injuries, or stroke. cancer, such as oesophageal or mouth cancer. Stomach reflux disease (GORD) is characterized by oesophageal reflux of stomach acid.
How do you fix swallowing problems?Consider taking shorter, more frequent meals. Eat less slowly, thoroughly digest your meal, then cut it into small pieces. There really are similar products that thickening drinks if you have problems swallowing liquids. experimenting with different food textures to find which ones make you feel more uncomfortable.
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foreign material that invades the body: a.granulocytes b.macrophages c.antigens d.antibodies e.neutrophils
Foreign material that invades the body is c. antigens.
In the field of science, an antigen can be described as a foreign material that infects the body of a person. In response to an antigen, the immune system gets activated to attack it.
Antibodies are those proteins that the body of a person makes in response to an antigen. An antigen can be any disease-causing microorganism such as a bacteria or virus.
Some antigens may be more infectious than others.
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for hfr conjugation, of the rolling cycle replication takes one gene per second to transfer, what is the result of the recipient after a 3 second conjugation?
For hfr conjugation, of the rolling cycle replication takes one gene per second to transfer, what is the result of the recipient after a 3 second conjugation then There is a copy of that in the recipient cell.
Bacterial conjugation, often known as bacterial sex, is a key method of horizontal gene transfer in which DNA is directly transferred from a donor bacterium to a receiver bacterium. The typical form of a recipient cell is aplasma or some chromosomal D. N. A. One of the components of donor cells is the H. F. R. F. DNA from chromosomes and plasmids will be transferred to a recipient cell.
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19.in the context of molecular genetics, how does one reconcile the terms overlapping genes and nonoverlapping code?
A DNA sequence can contain many gene products (overlapping genes), but no one nucleotide can be used by more than one codon at a period (i.e., genetic code is non overlapping).
What does mean by overlapping?1: to cross or surpass and encompass a portion of There are gaps between the roof shingles. 2: to share a characteristic with the baseball season, which begins in September and ends with the football season. unchanging verb. 1: to partially occupy the same space The two towns are adjacent.
What is overlapping explain their types?The overlapping orbitals sigma () and pi () are of two different sorts. Two orbital angular momentum, one on each atom, that overlap to produce both bonds.
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A long string of codons for amino acids, uninterrupted by a stop codon is called?.
Answer:
A long string of codons for amino acids, uninterrupted by a stop codon is called an open reading frame.
Explanation:
An open reading frame is a portion of a DNA molecule that, when translated into amino acids, contains no stop codons.
In metabolism, energy is transformed several times. Which of the following represents an example of a transformation of energy that occurs in both photosynthesis and aerobic respiration? The conversion of the kinetic energy of light to the potential energy of electrons stored in chemical bonds The conversion of the potential energy of an electrochemical gradient to the potential energy stored in ATP The conversion of the potential energy stored in chemical bonds to the potential energy of an ion gradient
During the light-dependent reactions, chlorophyll absorbs solar energy and converts it into chemical energy that is subsequently stored.
What does the term "electrochemical" mean?The field of chemistry termed as electrochemistry is concerned with the investigation of the relationship between chemical changes and electrical fuels. Electric currents can be generated or introduced during electrochemical processes.
What use does electrochemistry serve?Electrochemistry has many common applications in daily life. All sorts of batteries, even those that power lamps, calculators, and automobiles, primarily generate electricity through chemical processes. Electricity is required for the plating of objects with decorative precious metals such as gold and chromium.
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sometimes tectonic plates shift past each other in____ directions at their boundary
sometimes tectonic plates shift past each other in divergent directions at their boundary
What is a tectonic plate?A tectonic plate or lithospheric plate is a massive, irregularly shaped solid rock composed of both continental and oceanic lithosphere.
The Plate size can vary greatly that is from a few hundred to thousands of kilometers across the Pacific and Antarctic Plates and the Plate thickness also varies greatly.
Continental crust is made up of granitic rocks which contain relatively lightweight minerals such as quartz and feldspar where as oceanic crust is made up of basaltic rocks, which are much denser and heavier.
Most of the boundaries between the plates is not seen, because they are hidden beneath the oceans and oceanic plate boundaries can be mapped accurately.
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What is the difference between active and passive transport?
A. Active transport can only move SMALL molecules.
B. Active transport does NOT use energy.
C. Active transport uses DIFFUSION to move molecules across the cell membrane.
D. Active transport USES energy.
condition associated with sideropenia, causing deficient production of hemoglobin: a.iron deficiency anemia b.pernicious anemia c.hemolytic anemia d.thalassemia e.aplastic anemia
Condition associated with sideropenia, causing deficient production of hemoglobin "aplastic anemia".
People having pernicious anemia frequently have extremely low hemoglobin levels but little hemoglobin-related symptoms, like exhaustion. Additionally, they can have low numbers of platelets, which are necessary to clot blood as well as stop bleeding, and white blood cells, which are crucial in fighting infections.
Megaloblastic anaemia can have a variety of reasons, but the most frequent one in children is a folic acid or vitamin B-12 deficiency. These are some additional sources of megaloblastic anaemia: intestinal ailments Megaloblastic anaemia can be caused by specific lower digestive tract illnesses.
Therefore, the correct answer will be (e)
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in an actively contracting skeletal muscle cell, what would cause a decrease in the rate of glucose diffusion into the cell?
Hexokinase would cause a decrease in the rate of glucose diffusion into the cell in an actively contracting skeletal muscle cell.
What is the Hexokinase?Hexokinase is a glycolytic enzyme that is able to decrease the rate of glucose diffusion into the cell because catalyzes the generation of glucose 6 phosphate from glucose, and therefore it decreases its level in the cell.
Therefore, with this data, we can see that the rate of glucose diffusion into the cell can be influenced by the Hexokinase enzyme which uses glucose to generate glucose 6 phosphate.
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a 40-year-old black man is in the office for his annual physical. which statement regarding the prostate-specific antigen (psa) blood test is true, according to the american cancer society? the psa:
The Prostate-Specific Antigen (PSA) blood test is true according to the American Cancer Society if should be done at age 45 years.
What are the American Cancer Society recommendations for Prostate-Specific Antigen (PSA)?The Аmericаn Cаncer Society (АCS) recommends thаt men hаve а chаnce to mаke аn informed decision with their heаlth cаre provider аbout whether to be screened for prostаte cаncer.
Аge 50 for men who аre аt аverаge risk of prostаte cаncer аnd аre expected to live аt leаst 10 more yeаrs.Аge 45 for men аt high risk of developing prostаte cаncer. This includes Аfricаn Аmericаns аnd men who hаve а first-degree relаtive (fаther or brother) diаgnosed with prostаte cаncer аt аn eаrly аge (younger thаn аge 65).Аge 40 for men аt even higher risk (those with more thаn one first-degree relаtive who hаd prostаte cаncer аt аn eаrly аge).Your question is incomplete, but most probably your full choices were
A) should be done with this visit.
B) should be done at age 45 years.
C) should be done at age 50 years.
D) is only necessary if there is a family history of prostate cancer.
Thus, the correct option is B.
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