Which of the following questions could best be explored using a scientific investigation?
a. how many seeds are in an apple?
b. how many pebbles are at the bottom of a river?
c. why are there insects on earth?

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Amoeba sisters video recap pedigrees

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.