BIOLOGY HIGH SCHOOL

The atmosphere that we depend on for our survival is enriched by numerous cyanobacteria. This fact justifies which characteristic of cyanobacteria

Answers

Answer 1
Answer: A. Cyanobacteria are photoautotrophs. 

Related Questions

Darwin hypothesized that there are definite steps to natural selection. Consider the model here. Use the Roman numerals (I - III) to guide you through the steps. Which is an accurate description of Darwin's hypothesized theory of natural selection? A) Sexual reproduction of bacteria cause variation. Some bacteria survive and some do not. Over time all of the bacteria should become extinct. B) In any population, variation exists. Some bacteria are resistant to antibiotics. Most bacteria die, but the bacteria that are resistant survive and reproduce. C) In a population of bacteria that are exposed to antibiotics, some bacteria change their genetic make-up and survive. The new genetic make-up is passed on to offspring. D) There is a change in the environment: an antibiotic is added. Some of the bacteria are capable of changing to the new environment. They survive and reproduce, passing along their favorable traits.
Which is part of the biosphere? A. humans B. stratosphere C. volcanoes D. oceans
Which process helps gas exchange to occur? transfusion condensation evaporation diffusion
describe the three steps in urine formation. include a definition of the molecules involved during each step, as well as the process involved (active or passive transport)/
A dependent variable isa. directly changed by the experimenter. b. manipulated by changes to the independent variable. c. a variable that is kept constant. d. a variable that is used as a control

Most bacteria areA.
microbial predators.
B.
heterotrophs.
C.
symbionts.
D.
photoautotrophs.
E.
chemoautotrophs.

Answers

Most bacterias are heterotrophs. Meaning they can't make their one good ( sadly :3)

In an experiment, a scientist makes a radioactively labeled probe using human DNA. She then discovers that the probe hybridizes to a small segment of DNA isolated from a plant. What can she conclude from her results? A.The plant might have a gene that is similar to a human gene. B.The wrong method was used to detect radioactively labeled DNA. C.A plant cell has a cell wall, whereas a human cell does not. D.Plant DNA was accidentally used as a template to make the probe.

Answers

Answer: The correct answer is- A.The plant might have a gene that is similar to a human gene.

Probe can be described as the segment of DNA or RNA (generally 100-1000bp in length) that is designed and radioactively labelled to detect the presence of nucleotide sequences, which are complementary to it.

In this question, the probe is synthesised using sample of human DNA but it also hybridizes with the plant DNA.

This indicates that plant genome has certain DNA sequence or gene that is similar to the gene in the human DNA.

Thus, option A) is the right answer.

I believe the possible correct choice is A.

People once believed that the world was flat. What changed their minds? A) the invention of the globe B) Queen Mary decreed the world was round C) continued travel to the western hemisphere D) testing new hypotheses that generated new data

Answers

C) continued travel to the western hemisphere
 Any time a scientific theory is challenged, it means it's not a good theory. And this statement is not valid. In theoretical models, they are revisited when there are further studies and discoveries found in a certain area where they can be remodeled and reintegrated instead of disregarding its credibility. Models, theories and paradigms are not challenged but rather encouraged, they are supported in many studies since these theories and models were created in order for us to understand a certain phenomenon but it would likely help the scientific society to be updated in the new forms or spheres of improvement rather than discouragement.   

Answer:

D

Explanation:

testing new hypotheses that generated new data

The time it takes to run a mile depends on a person's running speed. Which option is the DEPENDENT VARIABLE? *running speed

time to run a mile

type of shoes worn

Answers

The time to run a mile

Choose the correct term for the following definition: a hormone secreted by the adrenal cortex. a. polydipsia
b. corticosteroid
c. epinephrine
d. glycogen

Answers

Answer:

B

Explanation:

Corticosteroid. Secretion of these hormones increases during pressure identified with nervousness and serious damage. The hormone impact a wide range of physiological procedures, including pressure reaction, regulation of irritation, starch digestion,insusceptible or immune reaction and conduct.

Final answer:

The correct term for a hormone secreted by the adrenal cortex is corticosteroid. These hormones are involved in metabolism, immune response, and maintaining the balance of water and electrolytes in the body.

Explanation:

The correct term for a hormone secreted by the adrenal cortex is b. corticosteroid. The adrenal cortex, a part of the adrenal gland, secretes several types of corticosteroids, including glucocorticoids, mineralocorticoids, and androgens. These hormones play crucial roles in metabolism, immune response, and maintaining the balance of water and electrolytes in the body. They differ from other hormones like epinephrine (c.), which is secreted by the adrenal medulla, and they are not related to glycogen (d.) or the medical condition polydipsia (a.).

Learn more about Corticosteroid here:

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What happens if both sister chromatids move to the same pole

Answers

Although many cells go through both anaphase A and B motions, occasionally one motion takes precedence over the other. Poleward migration in anaphase requires the separation of the paired sister chromatids. The components that link the chromatids at the centromere are degraded by proteolysis, which causes chromatid separation.

What both sister chromatids move to the same pole?

Synapsis is the name given to this action. Crossing over happens during synapsis. DNA is transferred between two nonsister chromatids of a homologous pair of chromosomes during crossing over.

When nondisjunction occurs, the homologous or sister chromatids are drawn to one pole of the cell because the separation does not take place.

Therefore, One daughter cell would have more chromosomes than usual, and one sister chromatid would not split equally during the anaphase of mitosis.

Learn more about chromatids here:

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You end up with two cells with aneuploidy, or abnormal chromosome number. One daughter cell will have one extra chromosome, the other daughter cell will have one less than what it should have. For example, if the normal number is 46, and this happened, you would end up with one cell with 45 and one cell with 47.
Other Questions
The venus flytrap is different from most other green plants because it _____.   a. can digest insects.   b. grows very slowly.   c. survives without much water.   d. lives off the roots of a tree.
Phenotypes are an observable expression of someone'sgenotypes personality RNA parents
Mimulus lewisii and Mimulus cardinalis are two plants that occupy the same habitat but do not interbreed in nature. However, they can be readily crossed in the laboratory to produce fertile offspring. Which of the following is a likely reason that prevents interbreeding of these plants in nature?A(They only reproduce by self–pollination.B(They have incompatible gametes.C(They show seasonal differences in flowering.
Which biome is characterized by low annual rainfall, less than 26 centimeters (about 10-11 inches) per year? A) desert B) tundra C) grassland D) tropical rain forest