How do sex cells differ from other cells in an animal's body?
a. they are usually much larger.
b. they are always moving.
c. they do not need energy to perform their functions.
d. they have half the number of chromosomes.

How can active reading strategies you? o a. they can you get into better physical shape. o b. they can you read fewer science articles. o c. they can you understand what you read. o d. they can you avoid reading altogether.