Infectious agents vary in their size and shape. Which infectious agent tends to be the smallest?

A.

parasite

B.

bacteria

C.

viruses

D.

fungi

How do you do 1/4 and 7/8

What role do animal preserves play in maintaining ecosystem biodiversity?

What are crayfish burrows called?

What is pH? A.) How basic a solution is B.) The concentration of hydrogen ions in solution C.) How acidic a solution is D.) The concentration of potassium ions in solution

Cultured mammalian cells grown in thymidine for many generations were allowed to undergo replication in the presence of bromodeoxyuridine (BrdU), which replaces thymidine in DNA. After one round of replication, what does the DNA look like?

An experiment was conducted to determine which type of fruit attracts the most fruit flies. Equal sized pieces of apple, pear, and banana were placed in separate containers at different areas around the school.

In the F2 generation of Mendel's crosses, A. all plants had the dominant trait. B. half of the plants had the dominant alleleC. all plants had both the dominant and recessive alleles. D. one in four plants had two alleles for the recessive trait.

In a population, when the birthrate becomes higher than the death rate, the population's growth rate A) decreases. B) increases. C) slows to a stop. Eliminate D) levels off and remains constant.

Types of calcareous marine microorganisms

Which of the following are examples of the first specialized tissues? A. antennae B. eyes C. kidneys D. tentacles