During a knee-jrk reflex the nerve impulse is received by the
a. thalamus.
b. brain.
c. spinal cord.
d. spinal cord then the brain.

Agroup of plant cells was exposed to radiation, which damaged the chloroplasts and caused them to lose function. if the mitochondria were unharmed, what would happen to the overall function of the plant cells? a. the cells would not be able to make food, but would be able to release energy from biomolecules. b. the cells would not be able to replicate dna, but would be able to break down waste. c. the cells would not be able to break down waste, but would be able to replicate dna. d. the cells would not be able to release energy from biomolecules, but would be able to make food.

What is responsible for the uneven heating between the poles and the equator on any given day

Identify the structures ! 20 points