Which statement describes how this experiment relates to how organisms obtain
and use energy?
The snail uses energy to release oxygen
for the elodea.
Elodea uses light energy to create
B
chemical energy for the snail.
Elodea releases carbon dioxide while the
snail releases oxygen.
The snail provides kinetic energy to the
D system while the elodea provides
potential energy

Explanation:

A

the sphincter muscles at the end of the digestive tract is the anus.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.