Give two reasons why it is better for human muscle cells to produce energy through aerobic respiration rather than anaerobic respiration. (Think about amount of energy produced per glucose molecule and the products of each type of respiration)

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error?

Why do we perceive objects as retaining their brightness under different lighting levels?

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium