On reaching the oocyte, a human sperm cell must pass through what layer(s) before it can fuse with the plasma membrane of the egg?
What will be an ideal response?
the corona radiata
the zona pellucida
Biology & Microbiology
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Free energy change is related to the equilibrium constant for a specific reaction.
Answer the following statement(s) true (T) or false (F)
Biology & Microbiology
Ascomycete yeasts evolved from multicellular ancestors
A. true B. false
Biology & Microbiology
Which factor is important for maintaining the different germ cell layers in the developing embryo? [Hint: without this molecule the embryo would be a ball of cells with no distinct germ cell layers.]
A. activin B. noggin C. Spemann's organizer D. Hox gene E. cadherins
Biology & Microbiology
Sensory information is acted upon by the ____, which sends signals to muscles and glands to effect a response
a. skin b. ears c. intestinal organs d. brain e. heart
Biology & Microbiology