Why are carbon and nitrogen cycles important to ecosystems? a. they supply the energy needed for living processes. b. they are needed to release the energy stored in food. c. they provide materials organisms need to build their bodies. d. they ensure that matter only moves within a nonliving environment.

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?