Respiration involves the breakdown of sugar. this process results in the production of energy for the cell. in order for cells to produce the most energy, what gas should be present?
a) oxygen
b) nitrogen
c) water vapor
d) carbon dioxide

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.