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krok68 [10]
3 years ago
11

Plz help right now !!!!!!!!!!!

Biology
1 answer:
djverab [1.8K]3 years ago
6 0

Answer:

Crossing over during meiosis creates genetic variation.

Explanation:

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What do you think that some atroids tumble over end through space while other asteroids rotate around their axis
quester [9]
Different masses and gravity?

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3 years ago
Explain how your body uses ATP and list the three parts of the molecle
Vinil7 [7]
ATP is a source of energy

adenosine triphosphate
Adenine
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Match the word to the definition
Leno4ka [110]

1 prokaryotic- a cell that lacks a nucleus and membrane-bound organel

2 eukaryotic-a cell that has a nucleus

3. Cell theory the theory that states that the cell is the basic unit of life and that cells come only from existing cells

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6 0
3 years ago
How is it that the same tertiary structure of a protein can result from different primary structures? Select one: a. Any protein
slamgirl [31]

Answer:

I believe that the best answer to the question: How is it that the same tertiary structure of a protein can result from different primary structures? Would be, B: None of the above.

Explanation:

This is probably the best choice from all the ones in the list simply because due to specific portions of the other answers they make the statement incorrect.

It will help to remember this: proteins have primary, secondary and tertiary structures because when they first emerge from the trascription process from mRNA, they are a simple string where the most important factor is the sequence of aminoacids. It is this sequence which will determine the folding factor. However, there is another factor that must always be kept in mind; environmental factors (temperature, medium where the protein is, as well as location where it is being produced) will also play a role on how the folding will happen and on which of the aminoacids.

The evolvement of a protein chain from its primary, to its secondary and then tertiary shape (the only functional, or known as native state) depends on which of the aminoacids in a specific sequence has the necessary elements to form bonds (hydrogen bonds) with others and thus start the folding process.

7 0
3 years ago
Under which circumstances should we try to control the population numbers of Pfiesteria?
zvonat [6]

Answer:

Pfiesteria species generally found in estuaries, the population of which are needed to be controlled only when they becomes toxic. Presence of large of fish triggers toxicity in Pfiesteria.

Explanation:

Pfiesteria are known to be associated with fish kills as for example large fish kill in the seas of North Carolina. It also causes blooming of algae in enormous numbers thus make the water bodies, hostile for survival of fishes and other marine lives. It affects human too by release of toxins in air and water often resulting in respiratory problems, infections of gastrointestinal system, headaches and fatigue. In this type of grave circumstances, leading to outburst of population of Pfiesteria, there is an urgent need to control.

8 0
3 years ago
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