1. why are goblet cells necessary for gi tract function? was there a difference in the amount of goblet cells in the stomach, duodenum, ileum, and large intestine? explain why this difference occurs or does not occur.

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.