Which of the following is not part of a simple reflex?
a. sensory neuron
b. interneuron
c. brain
d. motor neuron

Contrast how pollination is different among gymnosperms and angiosperms.

Which must be kept in mind when determining if an explanation is correct? check all that apply.which must be kept in mind when determining if an explanation is correct? check all that apply.

What are the student's observations and inferences before he starts his investigation?