What is a possible cause of the decline in amphibians on the planet?

A. pollution

B. predators

C. lack of water

D. loss of land

An "organism" is considered the highest level of organization of cells, yet it is also found at the lowest level of cellular organization. True False

suggest reasons for the fact that there are several ways to produce the amino acids that build hemoglobin

The frequency of a certain trait in a population will increase over many generations if which of the following is true? A) The trait is carried by all members of the population, but expressed only in a few.

What is a carnivore?

What phrase best describes a gene

Why the plants in a space are grown in enclosed containers

What affects about 1% of chronic alcoholics and involves a defect in remembering recent events?

What is the most common method used to count a large species population? A. Estimating B. Sampling C. Guessing D. A pencil and paper

Which of the following is true about DNA mutations? A. Mutations can only occur in the body cells of an organism. B. Mutations can only be caused by environmental factors such as radiation. C. Mutations can spontaneously occur during DNA replication.

How is a door hinge like the joint in your knee