Gİ EXERCISE

Biology

1 answer:

patriot [66]2 years ago

3 0

Answer:

1) To form a multicellular organism, a zygote must divide into 16 cells which produces ball structure called a morula. After that, morula is converted into a structure called blastula.

2) Adult stem cells are responsible for the maintenance of tissues and repair the damage tissues in the body. It is also called somatic stem tissue. It increase in number through cell division.

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Answer:

The correct answer will be- Homo neanderthalensis

Explanation:

The closest ancestor of modern humans which evolved in the Pleistocene age which was around 7 lakh to 3 lakh years is the Homo neanderthalensis or Neanderthals.

The Neanderthals became extinct around 12,000-10,000 years ago by competitive Homo sapiens.

The specimens of Neanderthals are collected from the central and Western Asia and parts of Europe and showed approximately the same cranial capacity which is around 1450-1500 cc.

Thus, Homo neanderthalensis is the correct answer.

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Answer:

second division nondisjunction

Explanation:

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2 years ago

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