19.
15. During respiration, the energy within the bonds
of a glucose molecule is released in small amounts
in a step-by-step, enzyme-controlled reaction. In
this process, the energy released is used to
(1) synthesize ATP
(2) control the process of diffusion
(3) synthesize more glucose
(4) produce oxygen molecules

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.