How do mutations lead to variation?
a.
by signaling proteins to be synthesized
b.
by producing changes in the genetic code
c.
by giving organisms new features for survival
d.
by providing a source of energy for cells
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Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

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.