What is the coelum?
a. the space between the ectoderm and mesoderm
c. the space between the two layers of the endoderm
b. the space between the mesoderm and endoderm
d. the space between the two layers of the mesoderm?

Write a 150-word essay describing the effect of people's activities on the environment in the region.

While most people who lived in ancient egypt and the middle east avoided settling in nearby deserts, those regions protected them from their enemies. why do you think this was true?

All of the following are reasons why deserts extremely susceptible to wind erosion except a. they lack major root systems b. they contain thin, dry soil c. they have very few plants and trees d. they are extremely hot and lack water