Members of the Porifera phylum have

a. no skeleton.

b. an exoskeleton.

c. an endoskeleton.

d. either an exoskeleton or endoskeleton, depending on the species.

A particular species of unicellular organism inhabits the intestines of termites, where the unicellular organisms are protected from predators.

Tides are a result of a. strong winds in the equatorial regions b. friction caused by the earths rotation c. the gravitational attraction of the sun and moon d. currents in the ocean

What draws water back to the earth

You are a scientist who discovers three new species of beetles in the jungles of South America. Describe, in detail, how a protein found in each of these beetles can be used to determine which species are more closely related.

Which of these statements correctly describes the results of mitosis? A. Mitosis results in two exact copies of the parent cell's genetic information B. Mitosis results in four exact copies of the parent cell's genetic information. C.

How should we properly understand human nature?

Which molecule would be the most affected by limited nitrogen

Where does the energy come from to make ATP at the cloroplast

According to condensuon theory, the most important factor for the formation of our plant was

Which of the following are functions of lipids? Choose three correct answers. A. forming the exoskeletons of insects B. forming waxy leaf coverings C. forming bones and cartilage D. storing energy in fat cells E. forming cell membranes F.