Telophase begins when( ).
A: chromatids line up in the middle of the cell
B: the nuclear envelope breaks down
C: chromatin condenses
D: daughter chromosomes arrive at opposite poles of the cell
E: centrioles reach opposite poles of the cell
A: chromatids line up in the middle of the cell
B: the nuclear envelope breaks down
C: chromatin condenses
D: daughter chromosomes arrive at opposite poles of the cell
E: centrioles reach opposite poles of the cell
举一反三
- Which of the following descriptions about anaphase is CORRECT?() A: The<br/>kinetochore microtubules are shortened by de-polymerization B: Microtubules<br/>attach to kinetochore of chromosomes C: The<br/>separated chromatids move to opposite spindle poles D: The<br/>shape of cell is stretched during the latter part of anaphase
- Mitosis is the normal process (by which) a cell divides, (each) new cell (ending) up with (a) same number of chromosomes as the parent cell.（） A: by which B: each C: ending D: a
- Complex<br/>of DNA and proteins that makes up the chromosomes in a eukaryotic<br/>cell is called ______ .
- The same properties of spirochete to bacterium is A: cell wall B: nuclear material C: spiral cell D: two division E: motion lively
- The envelope of an animal virus is derived from the____of its host cell.( ) A: cell wall B: cell membrane C: glycolyx D: receptors