A person will gain weight if he/she consumes food with more calories than he/she needs to provide the energy for body activities. Which explanation is correct? • The amount of ADP builds up in fat cells and muscle cells.
• Excess calories (energy) in the food are converted to fat molecules and stored in fat cells.
• Food molecules that are not needed for cellular respiration are converted to fat molecules and stored in fat cells.

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.

Environmental impacts on evolution : mastery test

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.