Answer:
True
Explanation:
Because improper transfer of chromosome to next generation especialy sex chromosome can cuase serious diseases.
In a turbite bed sediments is deposited chronologically.
<span>The formation of the fertilization envelope (slow-block to polyspermy) requires an increase in the availability of </span>calcium ions.
Slow-block to polyspermy is also called cortical reaction. In this reaction, the sperm will be permanently blocked by cortical granules. The release of calcium ion will trigger this reaction.
Answer:
D
Explanation:
When a population is genetically diverse there is a higher probability for some individuals in that population to survive during harsh conditions such as drought due to their highly resistant genes.
Answer:
four haploid cells.
Explanation:
meiosis is a reduction division where the contents are equally divided in two cells and so the genetic material becomes half.
during mitosis he genetic material doubles first and then the cell divides
but for meiosis the cell divides first and the genetic material replicates later in the second phase of cell division,because two divisions take place in one cycle the result is four cells.
