A function of white blood cells is to

A. carry carbon dioxide

B. fight disease

C. form blood clots

D. carry oxygen

How is the ecosystem related to a biome?

What causes air to move between the equator and the poles?

What tool could you use to determine who is the fastest swimmer in your class

Under the microscope, a cell shows formation of centrosomes and spindle microtubules.

Black hair in rabbits is determined by a dominant allele, B, and white hair by homozygosity for a recessive allele, b. Two heterozygous rabbits mate and produce a litter of seven offspring.

Do opposites attract or do birds of a feather flock together

Which drug is contraindicated in a pregnant client diagnosed with bipolar disorder?

What would be a good science experiment for a 5th grader to do?

The human digestive system cannot break down

Which statement about the effect of sunlight on the earth is true?