What did Crick describe about the direction of each nucleotide strand? A. They were parallel, but were oriented in opposite directions.
B. They were perpendicular to each other.
C. One wrapped around the other.
D. They were parallel, in the same direction.

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger

These are groups of reproducing populations that are insulated from other groups

When a plant is genetically identical to its parent plant what is this called