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A.Cytoplasm
B.Mitochondria
C.Nucleus
D.Membrane
A.The sheep was chosen as an ideal subject because of its genetic development, not for its precedence as a research subject.
B.The human embryo comes to rely upon its own genetic code at an earlier stage of development than the mice embryo.
C.The unfertilized sheep egg acquires a limitless supply of protein from the mother' s ovary.
D.The earlier the foreign nucleus assumes genetic control of the embryo, the more successful it will likely be.
E.The foreign nucleus transplanted to an embryo may be consider "older" than the nucleus it replaced.
A、pontine nucleus
B、nucleus of facial nerve
C、abducens nucleus
D、inferior salivatory nucleus
A、ambiguous nucleus
B、superior salivatory nucleus
C、inferior salivatory nucleus
D、facial nucleus
E、solitary nucleus
After the egg is fertilized the nucleus begins dividing.
A.Right
B.Wrong
C.Not mentioned
The proton (the nucleus of a hydrogen) has a mass of 1.67×10-24g. Suppose that its diameter is 1.00×10-13cm. Calculate the density of the nucleus, assuming it is spherical in shape.
A、suprachiasmatic nucleus
B、anterior nucleus of the hypothalamus
C、supraoptic nucleus
D、lateral nucleus of the hypothalamus
E、arcuate nucleus
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