Friction because it is the answer that I know because I am smart
<span>1. Introduction of a different environmental pressure, like an invasive species or a prolonged natural disaster.
2. Random mutation, where a gene or set of genes in an individual organism is randomly different from the normal type of that gene in the larger population. This individual may gain an advantage from this mutation and its offspring will inherit the advantageous trait.</span>
Give 50 subjects 500 milligrams a day.
Give 50 subjects 1000 milligrams a day.
Give 50 0 milligrams a day.
Answer:
A, D
Explanation:
Producers are organisms that get their energy from inorganic matter
Tall grass is a plant that gets it's energy from the sun