A lipid molecule primarily is used as a storage mechanism for the cell as ATP doesn't last very long before degenerating.
The scientist can conclude that the plants that were used in this experiment contained both a dominant and recessive allele. That the plants were hybrids which causes the off springs to have a 3:1 ratio.
Pigment molecules absorb light energy.
Earthworms have rings of circulatory muscles in each segment that help them move.