As the snow melts from atop mountains in the spring, the river below begin to flood. what type of disturbance is this?
a. primary
b. secondary
c. cyclical
d. small

During the process of meiosis, special cells called gametes are formed. gametes only have half the number of chromosomes that the other cells in the body have. what form of reproduction do organisms that produce gametes use?

What are two examples of conduction that we use everyday

Crossing over is a method of (blank)?