Jordan notices that the bottom part of a cliff is worn away. why is the cliff worn away the most near or under the level where the water is?

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 was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

How does a catalyst influence a chemical reaction?