The ear drum/ tymanic membrane ____ when sound waves hit it.
Fill in the blank(s) with the appropriate word(s).
Ans: vibrates
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Place the following events of fertilization in the correct chronological order.
(1) Sperm contacts the cumulus mass. (2) Proteolytic enzymes are released from the acrosome. (3) Sperm contacts the plasma membrane of the ovum. (4) Sperm passes through the zona pellucida. (5) Sperm increase ATP production. A. 5,1,2,4,3 B. 1,5,4,3,2 C. 1,2,4,3,5 D. 5,2,4,3,1 E. 3,5,2,1,4
The zona pellucida is
A) a protective layer around the secondary oocyte. B) a protective layer around the sperm. C) a bump on the head of a sperm that contains enzymes. D) the biggest constriction of a chromosome.
During dynamic equilibrium the brain is taking into account all of the following pieces of information except ________
a. both body position and motion in space b. motion in space c. body position d. rotation of the head e. angular movement of the head
A group consisting of a common ancestor and all of its descendants is a
A. order. B. phylum. C. species. D. clade. E. genus.