Which of the following events happens first in the development of a new organism?

a. A morula is formed.

b. A blastocyst implants into the uterine wall.

c. A sperm fertilizes an egg to form a zygote.

d. A zygote undergoes mitosis.

Question

Biology

Ainsley Thompson

6 November, 01:36

Which of the following events happens first in the development of a new organism?

a. A morula is formed.

b. A blastocyst implants into the uterine wall.

c. A sperm fertilizes an egg to form a zygote.

d. A zygote undergoes mitosis.

+2

Answers (1)

Know the Answer?

Gage Miller · Answer 1

The answer is c. A sperm fertilizes an egg to form a zygote.

The first step in the development of a new organism is a sperm fusion with an egg and formation of a zygote. The zygote then undergoes mitotic divisions and as a result a morula forms. Morula is 16-cell mass that continues to divide and forms a blastocyst, which later implants into the uterine wall.

Which of the following events happens first in the development of a new organism?a. A morula is formed.b. A blastocyst implants into the uterine wall.c. A sperm fertilizes an egg to form a zygote.d. A zygote undergoes mitosis.

Which of the following events happens first in the development of a new organism?

a. A morula is formed.

b. A blastocyst implants into the uterine wall.

c. A sperm fertilizes an egg to form a zygote.

d. A zygote undergoes mitosis.