All plants we see today had ancestors that lived in the water. one of the reasons plants began to live on land was decreased exposure to fish that eat plants. decreased competition from other plants. increased exposure to oxygen. decreased exposure to salt in the ocean water.

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

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