Nuclear fuels are highly efficient sources of energy. What is an environmental impact of the use of nuclear fuels?

A. Nuclear fuel is easily exhausted.
B. Nuclear waste disposal is hazardous.
C. They decrease the pollution of fresh water resources.
D. They increase the emission of greenhouse gases.

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis. b. the primary role of microbes on the planet involves causing disease in animals and humans. c. microbes produce vitamins in the intestines. d. microbes play a role in breaking down waste and decomposing dead organisms.

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast