BIOLOGY HIGH SCHOOL

Each enzyme produced by the body isA. specific—meaning it is only able to catalyze a reaction with a certain molecule.
B.incomplete—meaning it requires other parts before it is able to bind to a molecule.
C. immature—meaning it cannot catalyze a reaction until many years later.
D. open—meaning it is able to catalyze a reaction with any molecule.

Answers

Answer 1
Answer: A an enzyme is very specific
Answer 2
Answer:

Answer:

A. specific—meaning it is only able to catalyze a reaction with a certain molecule.

Explanation:

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Microscopic organisms that are disease-causing agents are calleda. toxins. b. carcinogens. c. pathogens. d. antibodies.
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Agriculturists have developed some varieties of vegetables from common wild mustard plants, which reproduce sexually. Which statement best explains the development of these different varieties of vegetables? a. Different species can develop from a single species as a result of the effect of similar environmental conditions.
b. Different varieties can develop from a single species as a result of the recombination of genetic information.
c. Variations in a species will increase when the tate of mitosis is decreased.
d. Mutations will occur in the genes of a species only if the environment changes.

Answers

The answer is b. Different varieties can develop from a single species as a result of the recombination of genetic information. 

Varieties are a taxonomic level below subspecies, which is below species. They develop from a single species as a result of the recombination of genetic information. For example, Brassica oleracea is wild cabbage. From wild cabbage developed some varieties, in binomial nomenclature marked with var: Brassica oleracea var. oleracea - cabbage, Brassica oleracea var. italica - broccoli, Brassica oleracea var. botrytis - cauliflower.
They are all very similar because they are developed as the result of genetic recombination.

The statement that best explains the development of these different varieties of vegetables is as follows: Different varieties can develop from a single species as a result of the recombination of genetic information.

What is a variety?

The variety of a species of crop is a rank in a taxonomic classification, below species and subspecies.

According to this question, agriculturists have developed some varieties of vegetables from common wild mustard plants, which reproduce se*ually.

This suggests that the different varieties of vegetables can develop from a single species as a result of the recombination of genetic information.

Learn more about variety at: brainly.com/question/12685192

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What is combustion and how does it affect the carbon cycle

Answers

Combustion is the burning of fossil fuels such as coal, natural gas, oil, etc. It affects the carbon cycle because it adds much more carbon to the air. That then causes phenomenon's like global warming. Therefore, it is bad for our environment and ozone layer.

Complete the sentence. Choose the best answer from the choices provided. Based on the myths “The Maori: Genealogies and Origins in New Zealand” and “The Raven and the First Men: The Beginnings of the Haida,” one way the Maori culture most differs from the Haida culture is that the Maori cultureA. cares for the earth.
B. is made up of fierce warriors.
C. worships supernatural beings.
D. has a strong sense of community.

Answers

"Is made up of fierce warriors" is the statement among the choices given in the question that is the best answer from the choices provided. The correct option among all the options that are given in the question is the second option or option "B". I hope the answer has come to your great help.

b..is made up of fierce warriors

The major virulence factor produced by C. diphtheriae is diphtheria toxin. The production of diphtheria toxin during infection is controlled by a repressor, DtxR. The activity of DtxR is regulated by iron, which acts as a corepressor. During an infection, the levels of iron available in the tissues for use by C. diphtheriae are low. What effect will the decreased iron availability have on the production of diphtheria toxina. The lack of corepressor binding to DtxR will lead to a loss of repression and an increase in the production of toxin.
b. The corepressor will not be able to interact with the operator and will cause an increase in the production of toxin.
c. The repressor will not be active, therefore toxin production will decrease.
d. Without the compressor to interact with the operator, the repressor will stay bound to the promoter leading to a decrease in the amount of toxin.

Answers

Answer:

The answer to the question: What effect will the decreased iron availability have on the production of diphteria toxin, would be, A: The lack of co-repressor binding to DtxR will lead to a loss of repression and an increase in the production of toxin.

Explanation:

Diphteria is a very serious disease that is caused by the gram-negative bacteria Corynebacterium Diphtheriae, which attacks the upper respiratory tract, especially the throat, and causes a thick lining to form, complicating the normal respiratory function. In order to accomplish such a feat, this bacteria produces a toxin that attacks human cells. But the toxin will not be produced if there is a high availability of iron in the area where the bacteria intends to infect, because if that is the case, then iron will work as a co-repressor with DtxR to prevent the expression of the bacterial gene that codes for the toxin. A co-repressor means that iron will work as a coadjuvant for DtxR and will not allow the genes of the bacteria to produce the toxin. In the case of this question, the answer is A because we have a lack of iron availability, which means that DtxR will not be enough to stop the toxin from being produced.

Bones act as a frame to which _____ are attached for movement.cartilage
organs
striated muscles
cardiac muscles

Answers

The three types of muscular tissue are skeletal, smooth and cardiac. Skeletal muscles are muscles which are attached to the bone. Their main function is to help with skeletal movements. The smooth muscles are also known as involuntary muscles. We are unable to control their movements. It is found in the walls of organs such as the stomach and the bronchi. Lastly, the cardiac muscle is the heart muscle. It is only found in the walls of the heart. Structurally, it is a combination of the skeletal muscle type as well as the smooth muscle type

i know this is late but the correct answer is the cardiac muscles

The largest mass extinction event in the history of the Earth occurred at the end of the _______ period. A. Ordovician B. Devonian C. Permian D. Cambrian

Answers

Answer is C. The Permian saw the enhancement of the early amniotes into the genealogical gatherings of the well evolved creatures, turtles, lepidosaurs, and archosaurs. The world at the time was ruled by two landmasses known as Pangaea and Siberia, encompassed by a worldwide sea called Panthalassa.
The largest mass extinction event in the history of the Earth occurred at the end of the Permian period. This time period spans 46.7 million years, in this extintion nearly 90% of marine life and 70% of terrestrial beings died out. It took a lot of time to recover from this mess.
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