A common way that humans pollute water is through the addition of nutrients (fertilizers and sewage) to water as nonpoint source pollution. These added materials are full of nitrogen and phosphorus, two nutrients that encourage the growth of aquatic producers, such as algae.
High pitch sounds make it close to oval window. low pitch further up basilar membrane near apex of cochlea<span>.</span>
Answer;
He conducted an experiment with breeding pigeons.
Explanation;
The pigeons provided the perfect animal to test his theory of selection for quite a number of reasons including its trait diversity from wing structures to color patterns to size to flight patterns. From these experiments he concluded that by natural selection of randomly occurring traits that make species better suited for survival and reproduction, evolve in the astounding diversity of organisms on Earth today.
Answer:
The endocrine functions of the pancreas and liver coordinate efforts to maintain normal blood glucose levels.
A control group is important for an experiment because it allows the experiment to minimize the changes in all other variables except the one being tested.
