The answer is D. The ribs PROTECT the lungs and the heart. They allow you to move and they store minerals such as calcium. However it is the brain and the blood vessels that regulate the body temperature not the skeletal system.
<span>Some of the first animals to develop an endoskeleton were: echinoderms.</span>
Answer:
Hardy Weinbergs equilibrium(HWE) states genetic variation in a population will remain constant in disturbing factors absence. It also talks about the sum of frequency of both alleles being 100 percent.
In the sample given above the total s of individuals is 2,000. The result of MM+MN+NN (1,600+250+150) gives 2,000 which is a 100 percent and satisfies Hardy Weinbergs equilibrium
<span>The answer is that in these ecosystems, climax community may not occur. Ecological succession is the gradual process in which ecosystems change and develop over time, thus nothing remains the same and also the habitats are constantly changing. There are two main types of biological successions;primary succession which is an opening of a pristine habitat and the secondary succession which is a response to a disturbance.</span>
