Theories must A. Be supported by data
B. Be verified by other experiments(Lots of testing )
C. Subject to review by peers (other scientists)
D. May be modified or expanded if additional data is found
E. All of the above.

b. the carbon cycle ensures living things have a source of hydrogen

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.

the answer is definitely a