<span>It was then understood that sea otter were <u>a keystone species</u> <u>i</u>n the ecosystem. This term refers to a species which seems to be dominant in a biome - once that species is gone, its prey will explode in number, meaning there will be a lot more of them, and a lot less of the keystone species. This, as you can see, happened here in this case. </span>
The digeorge syndrome is a genetic disorder, which caused by the deletion in the chromosome number 22. This disease is characterized by the congenital heart disease, immunodeficiency, and hypocalcemia.
In this case, the most frequent clinical manifestation is hypocalcemia. Hypocalcemia is the condition, in which the blood calcium level would be declined to a significant level.
Answer:
It's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variable. When possible, control variables should be identified, measured, and recorded.
Animals depending on others for food. Food Web-A system of interlocking or interdependent food chains