Answer:
B. The population must be very large.
Explanation:
The frequency of spear grasses in different locations of an abandoned field is 40 After throwing a quadrant 80 times. Calculate its population size using a quadrant dimension of 1 square meter.
Answer:
40
Explanation:
The population size refers to the total number of individuals in a population. It can be obtained by counting the total number of individuals in a population. In a typical plant field where it is almost impossible to count the number of individuals, the population size can be mathematically estimated using the quadrat method:
Population size = (A/a) x n,
where A = area of the field, a = area of quadrat, and n = number of plants per quadrat.
In the illustration, the area of the abandoned field was not given. Hence, it is assumed that the area of the field is equivalent to the number of quadrat thrown. Since the size of the quadrat is 1 square meter:
Area of the field = 80 x 1 = 80 square meters.
Number of plant per quadrat = 40/80 = 0.5
Population size = 80/1 x 0.5 = 40
Therefore, the population size is 40 spear grasses.
Answer:
40
Explanation:
The cholera bacterium was first identified as a disease-causing agent through the groundbreaking work of Dr. John Snow in London in 1854. Dr. Snow mapped the incidence of disease and found that it clustered around a particular water pump. How did he make the causal connection between that pump and the disease
Answer:
Dr. John Snow in London in 1854 discovered that the water where the cholera outbreak was prevalent was the same water used in other places. He came to a conclusion that it must be as a result of the pipes transporting the water. The pipes were found to have sewage surrounding them which made the water contaminated.
When the pipes were removed from the sewage surroundings the contamination, sickness and death rates reduced drastically.
Why are legumes self sufficient when it comes to nitrogen?
A. They have a different way of creating proteins that does not require nitrogen.
B. They have an organic process for using atmospheric nitrogen.
C. They have nitrogen fixing bacteria in their roots that converts nitrogen to nitrates for them.
D. They have bacteria that make them immune to eutrophication.
Answer:
It's c. They have nitrogen fixing bacteria in their roots
that converts nitrogen to nitrates for them.
Explanation:
Legumes are sufficient when it comes to nitrogen because they have nitrogen-fixing bacteria in their roots that convert nitrogen to nitrates for them. Thus, the correct option is C.
What are Legumes?Legumes may be defined as a plant that has fruit or seed, is utilized for food, and belongs to the family of legumes such as pea and bean.
Legumes plants have an excess of nitrogen-fixing bacteria in their roots which assists them with a sufficient amount of nitrogen by converting the organic nitrogen into inorganic nitrates that are easily consumed by plants.
Therefore, the correct option for this question is C.
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What are the missing products in this model? Check all that apply. 2 ATP 4 ATP 2 pyruvic acid 2 NAD+ CO2
The given question is incomplete as the model is missing from the question, however, the correct model is attached with the answer :
Answer:
The correct answer is - 2 ATP and 2 pyruvic acids.
Explanation:
The given model represents the glycolysis pathway which is the first of the key metabolic step of cellular respiration. It helps in producing the energy in form of ATP through breaking down a glucose molecule into 2 molecules of pyruvic acid and with a series of enzymatic reactions.
This process also releases energy in the form of 2 molecules of ATP and NADH. The pyruvate or pyruvic acid molecules then moves to the link reaction, where acetyl-CoA is produced.
Thus, the correct answer is - 2 ATP and 2 pyruvic acids.
Answer:
2 ATP 2 pyruvic acid
Explanation:
edge 2020
what is photosynthesis
Answer:
Photosynthesis happens in the leaves of a plant.
This is a chemical reaction, which takes place inside a plant, producing food for the plant to survive. For photosynthesis to take place, carbon dioxide, water and light are needed.
I HOPE THIS HELPED YOU :)
Answer:
Photosynthesis is the process by which plants make their food.
Explanation:
photosynthesis in plants involve the green pigment called chlorophyll and generates oxygen as by-product.
When asked to analyze a sample of marine life, you notice the animal has an incomplete digestive tract, stinging cells, and swims by propeling water through itself. You conclude that you are observing a cnidarian polyp. True or False
Answer:
The correct option is;
True
Explanation:
The digestive system of Cnidarians is incomplete having only one single opening which is the gastrovascular cavity the representing the anus and the mouthof the Cnidarians
The hollow body of the Cnidarian polyp which allows water through has tentacles at the top bearing cells meant for stinging
A prey caught by the tentacles is drawn in to the mouth and ingested
The Cnidarians are able to attach to surface due to their attachment adapted lower end
The correct option is therefore true.
What's an electrochemical gradient?
The electrochemical gradient is the charge of an ion that is unevenly distributed across a membrane. For example potassium.
A small number of birds arrive on an island from a neighboring larger island. This small population begins to adapt to the new food plants available on the island, and their beaks begin to change. About twice a year, one or two more birds from the neighboring island arrive. What effect do these new arrivals have
Answer:
The environmental variation
Explanation:
Environmental variation has a big role for their beaks to change in a size and shape , that means if the birds like the condition of the place specially birds like to eat cactus fruits that is the reason for their beak rapid change
The Process of Photosynthesis. A sunflower is growing with roots below the ground. Water enters the soil to the roots. Sunlight and an element labeled A enter the plant. Sugars and an element labeled B exit the plant. As a natural resource, the atmosphere's interactions with the biosphere play a large role in cycling gases. This is mostly accomplished through photosynthesis and respiration.
Answer:
Element A: carbon dioxide
Element B: oxygen
Explanation:
When something is_____ it is
used to make something else.
it is processed and then
Answer:
Old/damaged
Explanation:
There is a variety of reasons why something can be turned into something else.
After about two minutes of exercise, muscles require oxygen to continuously produce energy. Carbon dioxide is a byproduct of energy production and must be removed from the muscles to maintain homeostasis.
Answer:
When exhaling and inhaling, respiratory homeostasis occurs, exchanging gases at the level of the pulmonary alveolus.
This process is in charge of removing carbon dioxide from the muscles and their subsequent oxygenation.
Explanation:
Hemoglobin is in charge of associating carbon dioxide and delivering oxygen to the muscle that suffered physical activity.
Excess carbon dioxide is pathological, causing muscle acidosis in the muscle and even its possible denaturation since it is highly contained by proteins.
If you were assigned the task of constructing a cladogram representing the evolutionary relationship between amphibians, turtles, lizards, snakes, crocodiles, birds, and mammals, what feature could you use as the shared derived trait
Answer:
Four Limbs
Explanation:
Answer:
The four limbs
Explanation:
A shared derived trait involves shared characters that lineages have in common, which have evolved in the lineages leading up to a clade and that sets members of that clade apart from other individuals.
The four limbs is found in virtually all amphibians, turtles, lizards, snakes, crocodiles, birds, and mammals. It might not be seen in snakes now, but historically it is believed that ancient snakes once possessed limbs. This feature is a shared derived trait that exist among the selected clade.
Pick the best one! U.S. international trade policies are designed to ______ the U.S. free enterprise system. A. change B. ignore C. restrict D. benefit
Answer:
C. Restrict
Explanation:
Let's be honest, it obviously can't be B even if you have no knowledge on this topic. Nor can't it be D. Which leaves A or C, however, change is a strong word for the government to basically do whatever they want. Which leaves C as the correct answer. Restrict, meaning that the government keeps the number of goods/cargo imported into a country under control. So C is the best answer choice.
If you feel that this is the incorrect answer choice, feel free to correct me!
Which statement best describes a cause and its effect that occurs during the process of muscle contraction?
Answer:
Muscle contraction can be explained by sliding filament theory.
1. Activation of muscles: the motor nerve generates an impulse to transfer signals from neurons to neuromuscular junction. This stimulates sarcoplasmic reticulum to release calcium into the muscle cells.
2.Contraction of muscles: calcium in the muscle cells binds with troponin causes actin and myosin to bind. Actin and myosin in the muscle binds and contract by utilizing ATP as a source of energy.
You are in your room listening to music and, realize you are thirsty, you can feel that your soda is no longer cold, and you decide to invite a friend over. What parts of the central nervous system would be primarily involved in each of these italicized behaviors
Answer:
Internal region of the brain and the hypothalamus are related to the sensation of thirst.
Thalamus is involved with the perception that the soda is not colder.
Explanation:
The central nervous system is the body system responsible for making your body receive information and respond appropriately, promoting full bodily functioning. It is formed by the brain, spinal cord and the components that form them.
Regarding the activities shown in the question above, we can say that some components of the brain are related. For example: The innermost part of the brain and the hypothalamus are related to feeling thirsty. This is because the inner part of the brain is responsible for making the brain understand how the organism is functioning, if something is missing or if there is any discomfort that needs to be resolved. The hypothalamus, in turn, is responsible for the release of hormones that signal that your body's homeostasis is unbalanced. With the interaction of these two structures you realize that you are thirsty.
In addition, the thalamus is responsible for allowing your body to receive sensory messages. It is this structure that allows you to realize that your soda is not cold when you touch the glass, or take a sip of it.
The predatory bacterium Bdellovibrio bacteriovorus drills into a prey bacterium and, once inside, digests it. When the predatory bacterium attacks the gram-negative bacterium, what are the first structures penetrated by B. bacteriovorus on its way into the prey's cytoplasm
Answer:
The outer membrane, a peptidoglycan layer, periplasm, and cell membrane
Explanation:
The predatory bacterium will have to penetrate the cell wall and the cell membrane of the gram-negative bacterium before getting access to the cytoplasm.
In order to penetrate the cell wall of a gram-negative bacterium, the predatory bacterium will have to penetrate the components of the cell wall which consists of an outer membrane, a thin peptidoglycan layer, and a gel-like matrix known as the periplasm.
Thereafter, the predatory bacterium will have to penetrate the cell membrane before eventually getting access into the cytoplasm of the prey bacterium.
The peptidoglycan layer or the outer membrane will be the first structure penetrated by the B. bacteriovorus.
The attack of the predatory bacterium on the other bacterium:In the given case, the predatory bacterium, that is, B. bacteriovorus needs to penetrate the cell wall and the membrane of the gram-negative bacterium prior of getting within the cytoplasm of the host bacterium.
To penetrate the cell wall of a gram-negative bacterium, the predatory bacterium have to infiltrate the cell wall components comprising,
An outer membranePeriplasm, that is, the gel-like matrixA thin peptidoglycan layerThus, the predatory bacterium will first have to penetrate the peptidoglycan layer of the gram-negative bacterium.
Find out more information about the attack of the predatory bacterium on the other bacterium here:
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Please help me.. ty if you do
Chloe is studying the effect a certain kind of fungus has on bacteria. Which of the following could be her hypothesis?
"I notice that when a certain fungus is present in a bacterial culture, the bacteria do not grow".
"Based on my tests, I realize that this fungus kills bacteria".
"I predict that the bacterial cultures in which I place this fungus will not grow".
"I propose that this fungus somehow kills bacteria."
Answer:
I propose that this fungus somehow kills bacteria
Explanation:
you rule out 2,3 because a hypotheses has not yet been proven therefore it is not certain
while in 1 in some cases the bacteria can also over power and kill the fungi using genes
but I chose 4 since fungi lack chloroplasts so they feed of ready made food and bacteria can be autotrophic therefore can manufacture food and so the fungi digests the bacteria in the process of trying to acquire the food since they don't have cell walls I guess
16. During the signal transduction process, the signal often triggers a signal transduction cascade. For example, a single activated receptor can activate hundreds of protein A molecules. Each activated protein A molecule activates hundreds of protein B molecules, and so on, until a cellular response occurs. What purpose does this cascade serve
Answer:
The cascade amplifies the signal.
Explanation:
The purpose of the cascade is to transmit a signal to other components in the shortest time possible and do it massively, so when a receptor is activated, this affects a high number of receptors. By doing a cascade reaction, the information travels very fast, achieving the objective quickly, and without a significant loss of energy, in other words, is an efficient method.
. There are different methods of sowing the seeds. Which one of the methods given below is not the methods of sowing seeds used by the farmer?
Answer:
A) Broadcasting B) Seed-drill
Explanation:
Options of sowing seeds are given below.
A) Broadcasting B) Seed-drill C) Transplanting D) Scattering E) None of these
Farmers used two methods for sowing of seeds such as broadcasting and seed drilling. Broadcasting is a method of seed sowing in which seeds are scattered in the field by hands or machines while seed drill is another method of sowing in which a device or machine is used which bury the seed at certain depth and at proper position in the field. In seed drilling method, seeds are sowing in lines while in broadcast, seeds are sown in every part of the field.
Which of the following is a primary function of carbohydrates?
Choose ONE answer:
A. Acting as a long-term energy source.
B. Speeding up chemical reactions.
C. Storing genetic information.
D. Providing short-term energy storage.
Answer: For me providing short - term energy storage is C so whatever providing short - term energy storage is on yours that's the correct answer. :D have a nice day.
Explanation: Carbohydrates are the main energy source of cells.
They provide a quick energy supply for all types of cellular activities.
The correct answer is
Providing short-term energy storage
The correct answer is option D. Providing short-term energy storage.
What Do Carbohydrates Do to Your Body?Carbohydrates are the main source of energy for your body: they help fuel your brain, kidneys, myocardium, and central nervous system. For example, fiber is a carbohydrate that aids digestion gives you a feeling of fullness, and lowers blood cholesterol levels.
Carbohydrate Function
Energy supply and blood sugar regulation.Gentle use of protein to generate energy.Degradation of fatty acids and prevention of ketosis.Biological recognition process.flavors and sweeteners.fiber.Learn more about carbohydrates here: https://brainly.com/question/336775
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A person has a sex-linked inheritable disease. Which statement is true about the set of chromosomes which are likely to carry the genes for this disease?
1-The gene is present on a single pair of chromosomes.
2-The gene is present multiple pairs of chromosomes.
3-The gene is always present on an X chromosome.
4-The gene is always present on a Y chromosome.
The statement is true about the set of chromosomes that are likely to carry the genes for this disease is the gene is present multiple pairs of chromosomes.
What is an example of autosomal?An autosomal recessive disorder needs two copies of the altered gene to compel the disease.
For example the Huntington's disease.
Thus, option "B" is correct, The gene is present multiple pairs of chromosomes.
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Answer:
b
Explanation:
In this project, you will analyze claims about the causes of inherited genetic variation. You will then make your own claim based on prior knowledge. Next, you will defend your claim by conducting research to gather information that supports it. Finally, you will present your claim and defense in a typewritten paper.
Answer:
The two major causes of the inherited genetic variation are 1-mutations during DNA replication and 2-crossing over during meiosis
Explanation:
The mutations are changes in the genetic information that may be inherited when they occur in germline cells (i.e. sperms and ova). Mutations include single nucleotide polymorphisms (SNPs), insertions and deletions (collectively named indels), and major chromosome arrangements such as, for example, aneuploidy, centric fusion, duplications, etc. On the other hand, the crossing over or recombination is the exchange of genetic material between non-sister chromatids of homologous chromosomes during Prophase I of Meiosis. Recombination is a phenomenon that generates new genetic combinations in the gametes and thus increase genetic diversity. Both germline mutations and crossing over events increase genetic variation in the offspring of the next generation, thereby these phenomena represent sources of inherited variation.
Geologists might study everything except for a. the moon. b. fossils. c. minerals. d. hurricanes.
Geologists are trained professionals that might study everything except for the moon (Option a).
Who are Geologists?Geologists are professionals who study the features of rocks and fossils that formed during natural processes.
Geologists also study the periods of time in which these fossils can have appeared on the Earth.
In conclusion, geologists are trained professionals that might study everything except for the moon (Option a).
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What is produced at divergent plate boundaries?
a. Mountains
b. Oceans
c. New seafloor
d. Earthquakes
Answer:
new seafloor
Explanation:
In some parts of Africa, the frequency of heterozygosity for the sickle cell anemia allele is unusually high, presumably because this reduces the frequency of malaria. Such a relationship is related to which of the following?
a) Mendel's law of independent assortment
b) Mendel's law of segregation
c) Darwin's explanation of natural selection
d) Darwin's observations of competition
e) The malarial parasite changing the allele
Answer:
The correct option is C.
Explanation:
According to Darwin's Law of Natural Selection, a gene that benefits the organism and helps it produce healty offspring so that it can survive is supported by natural selection and will receive a positive feedback over.
The fact that the heterozygosity for sickle cell anemia helps with the survivability of malaria, which is a deadly disease, suggests that the heterozygosity is favored by the law of natural selection.
I hope this answer helps.
A new species of aquatic chordate is discovered that resembles an ancient form. It has the following characteristics: external armor of bony plates, paired lateral fins, and a bony skeleton. In addition to these, it will probably have which of the following characteristics?
a) legs
b) metamorphosis
c) an amniotic egg
d) no jaws
Answer:
a) legs
Explanation:
Based on these characteristics it can also be said that this species would have legs. This is due to this new species having paired lateral fins. That is because paired lateral fins refer to the pectoral and ventral fins, which are corresponding to the fore and hind legs of the higher animals. Meaning that this new species would have had to have legs if they had paired lateral fins, and a bony skeleton would help corroborate this finding.
Answer:
no jaws
hope this helped :)
Which statement best describes genetic material?
A. A single gene contains hundreds of proteins that have the code for
making more genes.
B. Chromosomes are sections of DNA that have the codes for amino
acids
C. Genes are made up of chromosomes that are packaged tightly in
DNA
D. A single gene has the code for the series of amino acids that
makes a protein.
Answer:
D. A single gene has the code for the series of amino acids that
makes a protein.
Explanation:
Genes are functional units of heredity and they are made of DNA that is packaged in components called chromosomes.
Each gene carry a genetic code which codes for the series of amino acid creating a specific protein. In general, the genetic code specifies 20 standard amino acids that form proteins.
Hence, the best statement describes genetic material is "D" and other given options are incorrect.
DNA sequence into RNA: AATGCATATGCA
Answer: UUACGUAUACGU
Explanation:
In DNA to RNA Adenine(A) binds with Uracil(U), Thymine(T) binds to Adenine(A), Guanine(G) binds to Cytosine(C), Cytosine(C) binds to Guanine(G).
Hope it helps <3
What is difference between paranchyma tissues and sclernchyma tissues ?
Answer:
Parenchyma cells are the abundant cells that make up ground tissues in plants.They are flat at point of contact.they have thin primary cell walls and have large vacuoles for storage of food.In leaves they are called mesophyll and are sites of photosynthesis.In other parts they are sites for respiration and protein synthesis.
Sclerenchyma cells are cells with rigid secondary cell walls.Their cell walls are hardened with lignin which is the main chemical component of wood.Mature sclerenchyma cells cannot elongate and most of them are dead.
Explanation:
which characteristic of living things best describes why birds fly south for the winter?
Answer:
This is the few living things characteristic;
a.Growth and development
b.Response to the environment
c.Ability to reproduce
Living things respond to their environment when the season alters.
