Answer: Spermatogenesis begins at birth and continues throughout a man's life.
The process in which
haploid spermatozoa develop from germ cells in the seminiferous tubules of the
testis is known as Spermatogenesis. Thus, the process of spermatogenesis start
with mitotic division of the stem cells that is located close to the basement
membrane of the tubules. However, a mature male gametes known as sperm but it
is commonly known as spermatozoa.
Answer:
D. layer 8 it occurs in the core of the sun
The single mutation is in the B subunit of hemoglobin. one point mutation changed one amino acid and in malaria country the resulting trait, sickle cell trait, is very helpful to have in a heterozygous condition.
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Answer: sediment deposited by the sediment flow of mass wasting are the slowest type of mass wasting
Mass wasting is the movement of large mass of rocks, boulders, slit, soil, sediments and ice down a slope. It occurs during retreating glaciers, landslides and mudflows. Moraine is a glacier deposit that develops during a retreating glacier. It develops when a glacier melts and it leaves sediments of ice, rocks and others over an area. As, the glacier ice may melt slowly, it is a product of slowest type of mass wasting.
