How have cactuses adapted to the fact that it almost never rains in the desert?

A

They're covered in spikes.

B

They have thick, pleated stems.

C

They have big, waxy leaves.

D

They're camouflaged.

Which of the following can increase genetic variation during meiosis

What is the main reason that governments create natural areas called reserves? A. to provide natural areas for land development B. to create parks where people can see wildlife C. to build habitats for unique plants and animals D.

In paracrine communication a chemical signal acts within the tissue that produced it; in endocrine communication the signal reaches the target cells by way of the circulation. Are these two statements true or false?

What would happen to an ecosystem if an energy level disappeared? This is meaning in a pyramid.

Which of the following is a social consequence of global fuel dependence? a. rising costs of oil b. increase in atmospheric pollution levels c. poverty causing lack of access to fossil fuel resources d. an increase in the production of fossil fuels

During the process of RNA transcription, which of the following steps is not included?

What is the odd one out of breathing, sweating, respiration and why?

Which surface of the ocean current has the warmest water a. peru current b. north atlantic drift c. brazil current d. canary current

A forest habitat contains a great deal of plant and animal life. Using the forest habitat as a model, explain the difference between species richness and relative abundance. Discuss how each affects the survival and fitness of populations.

Sort the bones based on whether they belong to the appendicular skeleton or the axial skeleton.