How do tadpoles and birds develop and get born without a placenta?

9. wind power creates pollution. water air soil noise

Suppose you were the commissioner of corrections for your state. which correctional activities might come within your domain? which mostly would not

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.