A healthy ecosystem contains a diverse variety of species that factor into the food web within the ecosystem. It also has varied individuals within each population. Which of the following helps to keep an ecosystem diverse?
o A
increasing population density
B
interactions among communities
с
biotic factors
D
genetic variation

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.

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c. carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit

All other things being equal the size of a population will decrease if