How might a plant population be affected by the construction of a road through a forest? In your answer, consider how things such as pollution from automobiles, runoff from roadways, or an increase in sunlight might affect the plant populations that live in the forest.

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%