Which of these factors make hydrogen fuel cells a better option than burning fossil fuels? select all correct answers

a. hydrogen fuel cells have a higher energy efficiency.
bhydrogen fuel cells create less pollution.
c. burning fossil fuels relies on outdated devices and technology.
d. pure hydrogen is more readily available than fossil fuels.
e. hydrogen fuel cells are more expensive than fossil fuels.

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.