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Georgia [21]
3 years ago
6

A,B,C, or D :( pls help

Biology
2 answers:
Tcecarenko [31]3 years ago
8 0
It is A. That’s what I believe
SOVA2 [1]3 years ago
7 0
B because when the positive feedback happens it increases the temperature and when the negative feedback occurs the temperature lowers itself
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Describe what happens to the air in the lungs when we breathe. What happens to the concentration of
Otrada [13]

When we breathe in, oxygen enters our lungs and enters small sacs in our lungs called the alveoli. In the alveoli, the oxygen diffuses INTO the bloodstream through small blood vessels, called capillaries, that surround these alveoli. The oxygen is now in our bloodstream instead of our lungs and is used in cell respiration etc.

Oppositely, carbon dioxide is diffused FROM the bloodstream TO the alveoli, also through these capillaries. The carbon dioxide is now in the lungs instead of the bloodstream and when you breathe out, the carbon dioxide is breathed out out of your lungs.

Hope this helped, even if it helped a tiny bit. :)

6 0
3 years ago
Which condition is NOT a requirement of the Hardy-Weinberg equilibrium?
Bumek [7]
D; Hardy- Weinberg requires a very large population size so that genetic drift can be insignificant.
6 0
3 years ago
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4. Which of the following statements best describes how the traits of an organism are determined
butalik [34]

Answer Choices:

DNA provides the energy needed for an organism to grow and function

DNA is copied into mRNA, which controls cellular functions

DNA codes for proteins, which allow an organism to grow and function

DNA unzips and each strand codes for a different amino acid

Answer:

DNA codes for proteins, which allow an organism to grow and function

Explanation:

DNA provides the energy needed for an organism to grow and function  - this is false. DNA does not provide energy. A molecule called ATP, mostly produced by cellular respiration, provides energy for the cells to grow and function.

DNA is copied into mRNA, which controls cellular functions  - this is false. While it is true that DNA is copied into mRNA, mRNA does not directly control cellular functions. Instead, mRNA is translated into proteins.

DNA codes for proteins, which allow an organism to grow and function  - <u>this is true, as indicated above, DNA is transcribed to mRNA which is translated into proteins. Proteins carry out essentially all the functions in the cell</u>

DNA unzips and each strand codes for a different amino acid - this is false, DNA is transcribed into mRNA. Each mRNA codon (three bases) codes for a different amino acid

6 0
3 years ago
What is the nature of the majority of the water on Earth?
kvv77 [185]

Answer:

D: salty

Explanation:

The Majority of the earth is made of the ocean

i'm not sure this is correct tho

7 0
3 years ago
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HURRY PLZ WILL MARK BRAINLIEST
Bumek [7]

Answer:

The answer is 'D'- Their arm bones have the same structure, but not function. These are homologous structures.

Explanation:

Homologous structures are those which share a basic common structure but perform different function. The hand of a human performs functions like <em>writing, cutting, washing, chopping</em> etc. The wings of a bat are used for the purpose of <em>flying</em>.

Also, <em>a dolphin's flippers, a bird's wing, a cat's leg</em> are all <u>homologous structures</u>. The structures which are homologous have the following features:

  1. They share a <em>common origin</em>
  2. Their <em>anatomy</em> is similar
  3. They have a <em>similar pattern of development</em>.

4 0
3 years ago
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