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Katena32 [7]
3 years ago
7

The tundra is characterized by___.

Biology
1 answer:
blagie [28]3 years ago
6 0
Answer: 1. extremely cold temperatures.
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Diffusion is a passive process that accounts for the movement of respiratory gases across the capillary membranes of alveoli.
strojnjashka [21]

Answer:

True

Explanation:

Diffusion is a passive process (no energy required) in which the substance such as liquid and gases moves from an area of high concentration to an area of low concentration.

During respiration, carbon dioxide diffuses from the blood into the alveoli and oxygen diffuses from alveoli to blood across the respiratory membrane. The partial pressure of oxygen is low in the blood of the pulmonary capillaries and high in the alveoli. so diffusion allow movement of oxygen across the respiratory membrane from the alveoli into the blood.

Hence, the given statement is true.

4 0
3 years ago
Supposed a biologist design an experiment to study the effect of water pollution on the reproduction rate f salmon.what is the d
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The dependant variable would be the salmon, because they depend on the water and pollution levels to give a result.
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3 years ago
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Look at the graphs and choose the correct statement describing the relationship between BMR (basal metabolic rate) and body mass
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Small mammals have lower BMR, but use more calories per kilogram than large mammals.

7 0
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WHAT IS THE SEQUENCE OF A-T-G-G-C-A,
ehidna [41]

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It is the nucleoid and amino acid sequence

Explanation:

7 0
3 years ago
Freshwater fish need water near pH7.these fish prefer
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A. Neutral water

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More than 7 is alkaline (which has more than 7 letters). Alkaline = basic

7 is neutral

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