Which cytoskeleton protein takes part in the formation of contractile ring during cytokinesis?
A.microtubule
B.microfilament
C.IF
D.spindle body
- · 有4位网友选择 B,占比40%
- · 有3位网友选择 D,占比30%
- · 有2位网友选择 A,占比20%
- · 有1位网友选择 C,占比10%
A.microtubule
B.microfilament
C.IF
D.spindle body
B.Regulator gene
C.Operator gene
D.Promoter gen
E.Noncoding region
It is now universally accepted that children should be encouraged to do as much as they can for themselves in order to develop their brains and muscles, but so few people today seem to have time to allow the elderly the same means of keeping their minds and muscles active. They perform. innumerable services for the old that they would be much better left to do, even with a struggle, for themselves.
Convenient flats, "motherly" visitors, or organized entertainments cannot make up for the fundamental need which must be satisfied the need to retain to the end of life human dignity and the respect of one's fellows.
Many people are not aware that it is rather rude to ______.
A.talk casually about old people in front of them as if they were not there
B.show sympathy for the old
C.take care of the old when they are not ill
D.pat the faces of the contemporaries
A、The production cost of the item has been falling.
B、The selling price of the item has been rising.
C、The item is becoming obsolete.
D、Demand for the item is increasing.
A、is a ceremony held in Buckingham Palace
B、takes place at 11:30 every day
C、dates back to 1660
D、lasts half an hour each time
A、G1
B、G2
C、S
D、M
A、interphase
B、prophase
C、metaphase
D、anaphase
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