How often does oxygen cycle through the atmosphere

Aboy with an extra x chromosome probably has which of the following syndromes?

About __ of the mass of the cell is water

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.