Which one of the following is NOT a cause of acid precipitation? a. sulfur dioxide from burning coal b. nitrogen oxides from car exhaust c. destruction of the ozone layer Please select the best answer from the choices provided A B C

Nteractions between organisms and their environment impact the organism’s overall population. oahu amakihi and kauai amakihi are two closely related species of hawaiian honeycreepers. they have a common ancestor, eat small insects and nectar, and like to nest in koa trees. however, one species is found on the island of oahu, and the other is found on the island of kauai. which concept shows the relationship between oahu amakihi and kauai amakihi?

The number of living organisms in a particular area is

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis