the correct answer is D) The photovoltaic cells absorb light energy from the sun, then the energy is stored as chemical potential energy in the battery where it can be transferred to electrical energy.
He is incorrect because a catalyst is a substance that speeds up a chemical reaction so if there is no reaction to begin with a catalyst will not due anything.
Animals that use echolocation. Bats, whales, dolphins, a few birds like the nocturnal oilbird and some swiftlets, some shrews and the similar tenrec from Madagascar are all known to echolocate.
C, because it protects the cell from the outside environment
The mitochondria is the powerhouse, or in a sense the brain of the cell. The plant would be unable to (a) carry out respiration
