1. ^^Savanna is not a continent.
2. Antarctica is not mostly desert at all. Its cold.
3. Answer: Africa...
Answer:
Mutation plays an important role in evolution. The ultimate source of all genetic variation is mutation. Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele.
Answer:
Oxygen debt is a physiological phenomenon in which a person consume oxygen at fater rate that it replaced by new oxygen molecules.
As shown in the graph, oxygen debt occurs just after the end of exercise because oxygen is consumed at faster rate during exercise that leads to increased respiration and body attempts to replace the used oxygen.
To overcome the problem of oxygen debt, a person should take rest that allows the body to replenish its oxygen supply.
DNA is replicated during the “S” phase (synthesis).
Answer:
D
Explanation:
All the body's systems are linked together in some way. They all interact to produce a fully functioning organism.
A is not correct, becomes hormones are part of the endocrine system, not the immyne system.
B is not correct, because they are not explicitly involved in homeostasis
C is incorrect, all the systems are always working in the background.
The correct answer is D, one way in which the two systems are linked is that the cells of the immune system need to circulate around the body. The circulatory system is incredibly important for this, ensuring that the cells can reach their target sites
