A scientist noticed that the number of salamanders in ponds in the Rocky Mountains was declining. This was a (n)

a. hypothesis.

c. observation.

b. theory.

d. control.

Which of the following are NOT common invertebrates with exoskeletons? A) Anemone B) Crustaceans C) Insects D) Spiders

L In the common garden pea (pr um sativum), the gene for red flower color (R) is_dominant to the gene for white flower color (i).

Why is it thought that advances such as agriculture, literacy, and urbanization have not been accompanied by additional increases in brain size? a.? the earliest homo sapiens were as intelligent as contemporary humans. b.

What impact do nuclear power plants have on water resources?

What consumer is the one that eats animals that eat plants

What percentage of the offspring have sickle cell anemia

How does a large complex system like the earth system operate

How many poops does he average human take

What describes the long history of earth

A Ligustrum plant cell is exposed to an aqueous solution having sodium and chloride concentrations higher than the sodium and chloride concentrations of the cell interior.