The elements carbon, hydrogen, oxygen, and nitrogen make up which percentage of the human body?
O 50%
O 69%
78%
O 96%
Question 6
4 pts

What role do bacteria play in the carbon cycle

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

How does the study of genetic disorders such as pku biologists understand normal alleles?