A(n) BLANK protein is a transport molecule that binds
with a diffusing substance to carry it across a cell membrane.

What effect does plate tectonics have an organic evolution

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

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.