Why is sexual reproduction so important to many organisms? Pick the best answer from the choices below. A. It creates identical copies of organisms.
B. It creates offspring from parents.
C. It increases genetic variation.
D. It creates egg and sperm cells.

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Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.