Answer:
A
Explanation:
a. contain checkpoints that determine if the cycle will continue.
b. help move chromosomes to the new daughter cells.
c. produce more chromosomes before the cell divides.
d. grow and produce enough cytoplasm to fill two cells.
<em />
<em>The correct answer would be that G1 and G2 contain checkpoints that determine if the cycle will continue or otherwise.</em>
The cell cycle generally has three checkpoints that happen at G1, G2, and M phase of the cycle.
At G1 checkpoint, the integrity of the DNA of the cell is assessed to ensure that there are no damages and other conditions such as size and energy reserve are checked.
At G2 checkpoint, the cell is assessed for proper chromosome duplication to ensure that there are no mistakes or damages. The size of the cell and the amount of protein are also checked to ensure that the cell is ready for the active division phase.
At M checkpoint, correct attachment of the spindle fiber to the kinetochore of the chromosomes is checked. This checkpoint is also known as the spindle checkpoint and it happens towards the concluding phase of the metaphase stage.
<u>The correct option is therefore, A.</u>
DNA replication occurs in interphase.
C
A convergent boundary is where two or more tectonic plate collides. One plate, the denser one and usually the oceanic plate, is subducted under the less dense plate, usually the continental plate.
Explanation:
There is enormous stress in a convergent boundary due to enormous frictional stress as the plates try to slip past each other. In the process, the plates will acquire fissures. As the subducted plate dives into the mantle, it begins to melt and the molten rock rises forcing its way up through the fissures with enormous pressure. When this molten rock breaches the surface, the great pressure releases and the magma is spewed violently into the atmosphere.
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Answer:
66 beats per minute.
Explanation:
The resting heart rate occurs after and before the exercise, it is when the students body rests after the period of exercise
