<span>The primordial germ cell in the embryo undergoes mitosis to produce a spermatogonial stem cell.
The spermatogonial stem cell undergoes mitosis. The new cells could either be stem cells or spermatogonium cells.
The spermatogonium undergoes mitosis to generate a primary spermatocyte.
*** Up until this point, all cells are diploid ****
The primary spermatocyte (diploid) undergoes MEIOSIS I to generate TWO haploid secondary spermatocytes.
Each secondary spermatocyte undergoes MEIOSIS II to generate a total of FOUR early spermatid.
The spermatid mature in the seminiferous tubule, and once they are completely mature they are released into the lumen.
Now called sperm cells, they pass into the epididymis, where they are stored until time to be released during ejaculation
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The cell would dissolve in water
He developed and proposed a theory about evolution. Which is humans and animals changing to suit their environment over years
Answer:
5. Dead animals sink to the sea floor and decompose, leaving their skeletons.
2. Mud and said fall to the seated, heat and pressure cover the sediment to rocks.
1. the skeleton is buried by sediment and slowly mineralized to stone.
3. Erosion takes place, expending the fossils.
6. The sea retreats of the rock beds we pushed up and are expened
4. The process repeats itself as more sediment falls and more animals die.
Explanation:
This is just my best guess, so please take it with a grain of salt! :')
gl on whatever assignment you happen to be completing, btw :3
Answer:
Identical twins are also known as monozygotic twins. They result from the fertilization of a single egg that splits in two. Identical twins share all of their genes and are always of the same sex. In contrast, fraternal, or dizygotic, twins result from the fertilization of two separate eggs during the same pregnancy.
Explanation:
Hope that helps!
