The calcium that triggers muscle contraction is stored in synaptic vesicles. the motor neuron. the mitochondria. the endoplasmic reticulum.

Which of the following statements best describes the relationship between the environment and human health? a. the environment is the only factor that affects human health. b. many aspects of the environment can have an impact on human health. c. human health is impacted by changes in climate. d. the environment has no impact on human health. select the best answer from the choices provided

Before the can be observed by using a transmission electron microscope, cells are sliced into very thin sections. what disadvantage does this procedure present in the study of cellular parts

Which of the following explains why a tree is often used as a model to represent the principle of common descent