Our natural daily patterns of waking and sleep are called – rhythms. exposure to daylight or darkness causes the hypothalamus to signal the – gland, which regulates the amount of – in the bloodstream, so that production of this hormone is – during daylight hours than at night.

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.

9. the history of life on earth is recorded in

Identify the structures ! 20 points