Answer:
In humans, both sperms and ova contain 23 chromosomes.
Explanation:
During fertilization, the diploid chromosome number 46 is regenerated in the zygote. After 24 hours of fusion, human zygote starts to divide by mitosis, commencing the embryonic period. The zygote is divided into 2-cells, 4-cells, 8- cells and then 16-cells
<span>C. Weathering breaks down rock and other material</span>
Answer: D. Extinctions occur at higher rates during times of ecological stress when populations and species are poorly adapted.
Answer:
Four cell processes that all living cells need energy for include:
Cell Division
Synthesis
Transport
Breakdown of Nutrients
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False, each sex cell has one allele so when it combines with the opposing sex cell (depending on the gender) it fills in the gap.