Hormones turn on, turn off, speed up, or slow down the activities of organs and tissues.
true or false

What causes darkening of the skin as melanin production increases

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.

Which of the following forest management practices is best for reestablishing areas of forest?