Which property does a supermassive black hole exhibit? A. It is usually found in the spiral arms of galaxies. B. It can be easily detected. C. It has a very small amount of mass. D. It exerts a very strong gravitational pull.

Ineed to know why d is the correct answer asap

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.

What is the main fuel source for the work of the cell