How many independent variables should exist in a well designed experiment

A desert area has many species of cactus and brush as well as birds, snakes, lizards, and rodents. This desert is an example of a what: climax community, pioneer species, disturbance, secondary succession.

Which best compares habitat preservation and laws that protect biodiversity

Genetic disorders can result one sister, tides fail to separate properly. during which phase is this problem most likely to occur? A.) G0 phase B.) Cytokinesis C.) G1 phase D.) mitosis

Suppose 2 scientists r trying to perform an experiment that involves dangerous chemicals. How might their safety be affected by not using a common measurement?

Which outcome occurs when bonds between atoms are broken or formed? A. a physical change B. an element increasing in size C. a chemical change D. a change of state

Which of the following is NOT a red flag about your alcohol consumption?

What is the final energy source that the muscles need in order to move? fat sugar ATP glycogen

During ages six to eleven, Freud's latency period, what do experts believe happens to the libido? A. That it is channeled into self-development B. That it is only seen in small, private groups with peers C.

Name the four classes of organic compounds containing carbon

Arnold is a weightlifter being retested for after his urinalysis was positive for anabolic steroids. What kind of test is being used?