Answer:
Animal Waste and Fertilizers
Explanation:
Animals, like humans, obtain nitrogen from consuming foods. The foods that the animals consume get digested and with time, the animals release the extra undigested foods and nutrients in forms of urine and feces. Like wise, fertilizers are typically made with animal waste.
The natural selection process applies majorly inside back species wether than between species.
Hormones
The endocrine system includes various glands in the body that are responsible for secreting hormones into the bloodstream. Hormones are chemical substances produced by the body that regulate certain functions of cells and organs. Hormones can regulate sleep, sex, growth, stress, huger, metabolism, etc.
D. DNA replication
DNA always forms proteins
The answer to this question would be letter C because a dependent variable depends on the project. For instance, If there is a scientist trying to see which plant will grow the fastest just using water. The plant depends on the water. hope this helps!
