Natural selection relies on natural variations in organisms that make them more likely to survive. Where do these natural variations come from? A. programmed genetic changes to an individual
B. specific behavioral changes taught to an individual
C. random genetic changes in an individual
D. Random behavioral changes learned by an individual

The unique structure of the neuron is dedicated to the efficient and rapid transmission of neural signals. the relationship between neurons, the spinal cord, and the brain constitutes an elaborate communication system throughout the human body. all but one of the functions listed below are a result of this interaction.

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

What are the four stages of cell signaling?