What is the role of bacteria and lightning in the nitrogen cycle ?

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.

49 ! how are energy cycles and growth cycles related?

What are the three different shapes or structures shapes or structure of carbon-based molecules?