Which of these is a common characteristic of cnidarians?

A. They have four legs.

B. They have tentacles with stinging cells.

C. They live only in the oceans.

D. They live only at the surface of the water.

Which of the following is not a characteristic of all living organisms? A) energy utilization B) complex yet organized C) capable of self-reproduction D) composed of multiple cells

How did earth cool down enough to sustain life

Which planet do most known extrasolar planets most resemble? A. Pluto B. Mercury C. Mars D. Jupiter

Which of these is not currently a source of usable energy? A The sun B The moon Heat from within the earth's crust D Running water

Complete the sentence to describe the function of the immune system. The main function of the immune system is to provide to the body, which is defined as the body's ability to protect itself from pathogens it is exposed to.

Which of the following best describes what Einstein's theories tried to explain? A) the creation of the universe B) evolution and human development C) how the physical world functions D) the possibility of time travel

An important group of peripheral membrane proteins are enzymes such as the phospholipases that cleave the head groups of phospholipids. What properties must these enzymes exhibit?

The wall that separates the two lower chambers of the heart is called

What does a reviewer do during peer-review? Repeat the experiments in the article. Check for mistakes and bias. Focus only on mistakes in spelling. Change data to support results.

The term srimulus comes from the latin word stimulare, which means "to goad, prod, or urge." Explain how this meaning relates to stimulus