The first level of compaction of dna consists of:

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

Eutrophication caused by human nutrient pollution.

Nucleic acids offer variability because they contain alternate forms of genes called .