Leydig cells within the developing testis secrete _______ .
a. (AMH)- Anti-Mullerian Hormone
b. (GnRH)- Gonadotropin-releasing hormone
c. testosterone
d. progesterone
c. testosterone
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In a pond, tadpoles eat algae and fish eat the tadpoles. Above the pond, grasshoppers eat grass and, at night, are preyed upon by bats. Other bats eat the fish that eat the tadpoles. In this community, the tadpoles are:
A. primary producers. B. primary consumers. C. secondary consumers. D. tertiary consumers. E. detritivores.
In which of the three vertical intertidal zones is biodiversity the highest? Why?
What will be an ideal response?
Which of the following statements about the electron transport chain is true?
a. Protons are pumped out of the mitochondria by the complexes of the electron transport chain. b. The proton gradient established during electron transport is a form of potential energy. c. The electron transport chain can be found in the mitochondria of aerobic bacteria and other cells. d. The movement of protons down a concentration gradient is an endergonic process. e. ATP synthesis associated with the electron transport chain is an example of substrate level phosphorylation.
During which process do gametes fuse together?
A) embryonic development B) fertilization C) meiosis D) mitosis