[单选题]
The micrograph shows a sperm cell. Whic
jc,r ko2k, mam:h9jjqn* /b1dgankz,2 r- f;ph part contains enzymes t
u;r*a a 0f6ofio break down the zona pel
0;*orf6f aaiu lucida of the egg cell?
A.
B.
C.
D.
参考答案:
A
本题详细解析:
Arrow A is pointing to the acrosome, which is found at the front of the sperm head. The acrosome contains enzymes that break down the zona pellucida around the egg. Choice A is correct.
Choice B is pointing to the mid-piece, the site of the mitochondria which produce ATP to power the movement of the cell. Choice C is pointing to the nucleus, which contains the genetic information. Choice D is pointing to the tail of the sperm cell which propells the cell forward.
