Which sentence describes a disadvantage of using nuclear fision to produce electricity?
A. Fission changes one type of atom into another type of atom,
B. Fission produces only a small amount of energy
c. Uncontrolled fission reactions can result in dangerous explosions,
O D. Fission requires conditions that exist only in the cores of stars.
Answer is C

a. the production of carbon dioxide through the process of photosynthesis

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).

the answer is a) cell division.

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before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.