Brody studied the geologic time scale and became interested in the sorts of life that existed in each era.

He learned that scientists dated life in this era using the law of superposition and radioactive dating. Which of the following characterizes the Cambrian period? Choose the three that apply.

A.
all life lived in the sea

B.
invertebrates developed

C.
single-celled life

D.
dinosaurs flourished

E.
organisms with shells and outer skeletons developed

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.