1: In deep parts of the ocean fish have been without light for so long they evolve so they can no longer use their eyes.
2: plants underwater evolved to use chemosynthesis to survive.
This app still posts the answers so just quote me. Might I recommend using easybib. Also if you found this helpful make my answer the brainliest.
<h2>Exchange of Gases in the lungs</h2>
Explanation:
- Gas exchange occurs by process of <u>diffusion.</u>
- Gas exchange occurs in sac like structures called <u> alveoli.</u>
- <u>Oxygen</u> diffuses from the alveolar sacs into the blood in the capillaries.
- <u>Carbon dioxide</u> diffuses from the blood in the capillaries into the alveolar sac .
As blood passes through the lungs, it picks up oxygen and gives up carbon dioxide simply by diffusion down partial pressure gradients between blood and Alveoli,.
The blood having returned from body is relatively low in oxygen and high in carbon dioxide. On the other hand the alveolar air has higher oxygen concentration and lower carbon dioxide concentration.
Thus, when venous blood flows through pulmonary capillaries, oxygen moves from alveoli into the capillaries while carbon dioxide flows from capillaries into the alveoli.
In pea plants, tallness (T) is dominant to shortness (t). The predicted genotypic ratio of the offspring if a homozygous short plant is crossed <span>with a heterozygous tall plant is 50 percent Tt, 50 percent tt. </span>