Answer:
The correct answer is option A.
Explanation:
Cell cycle checkpoints are regulating mechanism that ensures the presence and viability of the cellular components essential for cell division.
There are three major checkpoints one G1 second at M phase and third is G2 checkpoint. M phase checkpoint ensures for chromosome spindle attachment. G1 checkpoint checks the nutrients, DNA damage and growth.
Thus, the correct answer is option A.
Semiconservative replication<span> would produce two copies that each contained one of the original strands and one new strand. Conservative </span>replication<span> would leave the two original template </span>DNA<span> strands together in a double helix and would produce a copy composed of two new strands containing all of the new </span>DNA<span> base pairs.</span>
4. Peas gave characteristics that have two forms
High in the atmosphere, air pressure decreases. ... A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.
