Which activity best displays muscles using a greater number of fast twitching fibers than slow twitch fibers?
a) cycling
b) running
c) swimming
d) weight lifting

9. wind power creates pollution. water air soil noise

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.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.