The first plant to grow in new environments are usually
a. ferns and horsetails
b. grasses
c. liverworts
d. mosses and ferns

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Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as