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Sveta_85 [38]
3 years ago
10

After fertilization, the cells of the zygote divide many times producing a solid ball of cells called a _____.

Biology
2 answers:
lawyer [7]3 years ago
6 0

Answer:

The correct answer will be option D (morula).

Explanation:

After fertilization or fusion of egg and sperm cells, zygote starts first cleavage division after 24 hours and form a solid ball of 10-30 cells called "morula" which can be seen after 96 hours or 4-days.

Morula cells do not show much growth as they are formed inside pellucid zone which cannot expand. This is the final stage formed prior to the formation of a fluid filled blastocoel cavity which further grows to form early blastocyst. The blastomeres on the surface of the morula fom extra-embryonic parts of the embryo while inside the morula develop into the embryo.

Thus, option D (morula) is the correct answer.

Alona [7]3 years ago
4 0
The correct answer is d. morula.
<span>
A morula is a stage in early development, formed 3–4 days after fertilization. It is a 16-cell mass which forms a solid ball contained within the zona pellucida. A morula develops into a blastocyst.</span>
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