Summarize the nervous system's influence on the respiratory system. A. It regulates heart rate.
B. It regulates breathing rate.
C. It stimulates pathogen response.
D. It controls muscle contraction.

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Aheterozygous normal male marries a woman with a sickle cell anemia. give the genotypes and possible phenotypes of the offspring

Ineed with a hypothesis my question is can seeds sprout in different locations?