Answer: B.
Explanation:
Arrows point to penguin, fish, krill, and other birds.
Answer: During the day, photosynthesis is dominant, so there is a net release of oxygen. At night, photosynthesis stops but respiration continues, so there is a net consumption of oxygen.
Explanation:
If the DNA strand is mutated it can cause genetical and physical defects. Just as an extra chromosome can cause Trisomy 21 which cause Down Syndrome.
