Leaves on green plants contain openings called stomates, which are opened and closed by specialized cells allowing for gas to exchange between the leaf and outside environment. which phrase best represents the net flow of gases involved in photosynthesis into and out of the leaf through these openings on a sunny day? a) carbon dioxide moves in; oxygen moves out b) carbon dioxide and oxygen move in; ozone moves out c) oxygen moves in; nitrogen moves out d) water and ozone move in; carbon dioxide moves out

Variety of living organisms; includes genetic, species, and ecological types.

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.

Which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea. c. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. d. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated.