When do a scientific theory change

Which of these minerals is a metal? A. sulfur B. lead C. gypsum D. halite

What comes first herbivores carnivores or producers

When did most of the major groups of animals first appear during the paleozoic era?

Classification of clouds above 10000 feet

What single cell flourished on earth

According to the medical model, select one: a. abnormal behavior can be thought of as a disease. b. all mental illnesses can be treated using drugs. c. all physical illnesses have a psychological component. d.

Which of the following would NOT contribute to the level of organization seen within a protein? 1. Temp 2. pH 3. Amino Acid sequence 4. Duration of protein 5. all of the answer choices are correct

What would happen to aquatic organisms if solid water were denser than liquid water? O A. The organisms would migrate to land. O B. The organisms would survive under the floating surface of ice during the winter. O C.

16) An increase in the amount of living material in an organism is called A) growth. B) homeostasis. C) reproduction. D) cell division.

Describe two processes through which rare alleles might become more frequent in a population