Oxygen combines with nitrogen to form what types of chemicals that are used by plants?

How does photosynthesis show the conservation of mass and energy?

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 are the pros and cons of quadrat sampling?