One year, heavy rain makes lake raymond very deep. the next year, however, rain is very light, and not much water is left in lake raymond. how will this most likely affect animal life in lake raymond? a. there will be an increase in bacterial life the second year. b. there will be more animal life the second year. c. there will be several new species of fish the second year. d. there will be less animal life the second year.

Option D, There will be less animal life the second year.

Explanation:

Lake is an ecosystem which predominantly consist of plant and animal species which are able to survive and grow in water.  

During the first year heavy rain had increased the depth of  Raymond lake and this caused more plant and animal species to grow/regrow and survive.  

While the same species faces problem when the water level in the Raymond lake decreases as there is no rain second year. The most badly affected are the species that lives at greater depth of the lake which was least exposed to sunlight or any other external environmental factor. But due to receding water level, even the species living at greater depths get affected.  

Thus, option D is the most appropriate answer

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:

one would be wind another would be water density