Speciation cannot take place without
A. homologous structures.
B. disruptive selection.
C. geographic isolation.
D. reproductive isolation.

What is the function of the somatic nervous system? connects the brain and the spinal cord to the rest of the body carry signals to the muscles and glands includes all nerves controlling the muscular system and external sensory receptors controls internal organs like the heart and bladder

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

If there are 350 trout found in 200 square feet of a pond measuring 1000 square feet what is the estimated trout population of the pond? a. 1350 b. 1550 c. 1750 d. 2000