What does animals store energy as

Animals store some energy as a more stable complex of many glucose molecules called glycogen. Animals also store some energy as fat, which has more energy for its weight than starches, and therefore is easier to carry around. Energy is broken down from its stored forms into glucose to be transported through the body.

it has one origin of replication, but it proceeds in two directions - d)

the organisms are not adapted to live in some communities or habitats.