What are the tympanum and stapes in tetrapods used for?

a. smelling
b. heat sensing
c. tasting
d. hearing


Ans: d. hearing

Biology & Microbiology

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Why is it important to have a slow block to polyspermy?

A. The fast block doesn't work well. B. The slow block creates a permanent barrier. C. The fast block is actually slower than the slow block. D. It prohibits the acrosomal reaction. E. All of the choices are correct.

Biology & Microbiology

Artificial selection and hybridization can demonstrate the __________ basis of behavior.  

A.  cognitive B.  operant C.  genetic D.  associational E.  endogenous

Biology & Microbiology

What occurs during stage 3 of labor?

A. The amniotic sac ruptures. B. The cervix dilates. C. Effacement occurs. D. The placenta is expelled. E. The baby is born.

Biology & Microbiology

Which of the following is a high-resolution light microscope technique for detecting interactions between proteins?

a. FRAP (fluorescence recovery after photobleaching) b. FRET (fluorescence resonance energy transfer) c. MPEM (multi-photon excitation microscopy) d. TIRF (total internal reflection)

Biology & Microbiology