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Romashka [77]
4 years ago
8

_______ are structures that evolve in one context but become co-opted for a different functions ?

Biology
1 answer:
emmasim [6.3K]4 years ago
8 0

Answer:

a. Exaptations

Explanation:

An exaptation is a structure of an organism that originally evolved as a feature to provide adaptation to a certain condition, but which, once consolidated (for example, several million years later) begins to be used and perfected in pursuit of a new purpose, which, sometimes, is not related at all to its original function.

An example is the feathers of birds.  Feathers are an exaptation becasue they  were originated to maintain body temperature more efficiently. However, feathers became later fundamental as a flying structure.

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Where would you expect to find genetic material in a prokaryotic cell?
Alexxx [7]

Answer:

The answer is Option B the nucleus

Explanation:

Genetic information in prokaryotic cells is carried on a single circular piece of DNA which is attached to the cell membrane and in direct contact with the cytoplasm. There is no enclosing membrane, so there is no true nucleus, but simply a concentration of DNA known as a nucleoid.

and DNA is present in the nucleus. Therefore option B is correct

hope this helped you

please mark as the brainliest (ㆁωㆁ)

7 0
4 years ago
__________identify antigens and then multiply and trigger the production of other kinds of immune cells.
solong [7]

<u>Helper t-cells</u> identify antigens and then multiply and trigger the production of other kinds of immune cells.

<h3>What are helper T-cells?</h3>

Helper T-cells are one of the main types of immune cells. They detect infections and activate other immune cells to fight the infection.

Your thymus develops helper T-cells. The thymus is a small gland in the front of your chest. The other types of T-cells include:

  • Cytotoxic T-cells, which fight infections.
  • Regulatory T-cells, which regulate or suppress other immune cells when needed.
  • NKT-cells, which can enhance immunity in general.

<h3>What are the subtypes of helper T-cells?</h3>

When helper T-cells detect an infection, they form into one of two subtypes:

  1. TH1 helper cells release a molecule that activates a type of cell called a macrophage. Macrophages are specialized cells that help eliminate foreign substances from your body. TH1 cells also activate cytotoxic T-cells.
  2. TH2 helper cells release molecules that activate B-cells. B-cells create antibodies. They also release cells that cause coughing, sneezing or diarrhea to help your body get rid of foreign substances. This group of T-cells helps generate allergy antibodies.

Learn more about helper T-cells

brainly.com/question/14902979

#SPJ4

5 0
2 years ago
A student designed an experiment to show how water is recycled through the atmosphere. The steps of the experiment are shown bel
Kipish [7]
3. water vapor condenses easily on cold surfaces
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4 years ago
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zhuklara [117]

Answer:

They viewed the Panther with fear and set out on a mission to exterminate it.

Explanation:

The first Spanish conquistador to ever sight a Panther was Alvar Nunez Cabeza de Vaca in 1513. When he saw the panther which he referred to as a lion, he was fearful of the animal. He and other Europeans set out on a mission to exterminate all Panthers. This was also necessary as they had to clear the bushes for them to reside.

In 1821 when Florida officially became a part of the United States, and people had to relocate there, a $5 dollar bounty was placed on every Panther killed. The Panthers relocated farther into the wild. As of 1990, the population of the Panther was just around 50. Panthers have since been named an endangered species.

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3 years ago
Why do we call menstruation a "cycle"?
atroni [7]
Because it repeats the same process over and over again.
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4 years ago
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