4. Why do some marine scientists specialize in single-celled organisms? (1 poi A. There are very few species to choose from
B. Single-celled organisms are the least understood in the ocean.
c. Many of them are poisonous, so they endanger other creatures.
d. Single-celled organisms form the foundation of life in the ocean.
5. Chemical oceanographers often study pollution because (1 point)
A. most pollution occurs in the ocean.
B. pollution creates chemical changes.
C. no other field examines the implications of pollution
D. only chemical oceanography uses the scientific method.

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.

Which characteristics are typical of a human population in the postindustrial stage?

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?