With reference to the development of the embryo in humans, consider the following statements: 1. The embryo gets embedded in the wall of the uterus for further development. 2. The stage where body parts like hands and eyes can be identified is called the zygote. 3. The embryo completes its full development into a baby within the fallopian tube. Which of the statements given above is/are correct?

The correct option is (a). Explanation In human sexual reproduction, the fusion of gametes leads to the formation of a zygote. This single cell undergoes repeated division to form an embryo, which travels to the uterus for implantation and subsequent development into a foetus. Statement-wise Analysis - Statement 1 is Correct: After fertilization occurs in the fallopian tube, the zygote divides repeatedly to form a ball of cells known as the embryo. The embryo moves down to the uterus and embeds itself in the thick, vascular wall of the uterus. This process is called implantation, which is essential for further growth and development. - Statement 2 is Incorrect: The zygote is the unicellular product of fertilization. As the embryo continues to grow, cells differentiate into tissues and organs. The stage of development where specific body parts (such as hands, legs, eyes, etc.) can be clearly identified is called a foetus. - Statement 3 is Incorrect: The fallopian tube (oviduct) is the site where fertilization takes place. However, the embryo does not complete its development there. It migrates to the uterus (womb), where the foetus develops fully over the gestation period until birth. Key Takeaway: The developmental sequence in humans is Zygote → Embryo → Foetus. Fertilization occurs in the fallopian tube, while implantation and full fetal development occur in the uterus.

With reference to the development of the… - NCERT Class 8 Science MCQ

NCERT Class 8 Science — Chapter 3: Reproduction in animals

mcqeasy

With reference to the development of the embryo in humans, consider the following statements:

The embryo gets embedded in the wall of the uterus for further development.
The stage where body parts like hands and eyes can be identified is called the zygote.
The embryo completes its full development into a baby within the fallopian tube.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 8 · Page 70

Options

A1 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (a).

Explanation

In human sexual reproduction, the fusion of gametes leads to the formation of a zygote. This single cell undergoes repeated division to form an embryo, which travels to the uterus for implantation and subsequent development into a foetus.

Statement-wise Analysis

Statement 1 is Correct: After fertilization occurs in the fallopian tube, the zygote divides repeatedly to form a ball of cells known as the embryo. The embryo moves down to the uterus and embeds itself in the thick, vascular wall of the uterus. This process is called implantation, which is essential for further growth and development.
Statement 2 is Incorrect: The zygote is the unicellular product of fertilization. As the embryo continues to grow, cells differentiate into tissues and organs. The stage of development where specific body parts (such as hands, legs, eyes, etc.) can be clearly identified is called a foetus.
Statement 3 is Incorrect: The fallopian tube (oviduct) is the site where fertilization takes place. However, the embryo does not complete its development there. It migrates to the uterus (womb), where the foetus develops fully over the gestation period until birth.

Key Takeaway: The developmental sequence in humans is Zygote → Embryo → Foetus. Fertilization occurs in the fallopian tube, while implantation and full fetal development occur in the uterus.

Your note

More from Chapter 3: Reproduction in animals

With reference to the social organisation in a honey bee hive, consider the following statements: 1. The queen bee is responsible for building the hive. 2. Worker bees are females responsible for building the hive. 3. Drones are male bees that develop from unfertilised eggs. Which of the statements given above is/are correct?

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Consider the following statements about the female reproductive system: 1. Oviducts are also known as fallopian tubes. 2. The uterus is a paired structure located on either side of the abdomen. 3. Fertilisation usually takes place in the oviduct. Which of the statements given above is/are correct?

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Consider the following statements about "Binary Fission": 1. It is a method of asexual reproduction. 2. It is observed in multicellular organisms like Hydra. 3. It involves the division of the body followed by the division of the nucleus. Which of the statements given above is/are correct?

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In the context of hen reproduction, consider the following statements: 1. Hens undergo internal fertilisation. 2. The hard shell of the egg is formed after the egg is laid. 3. The embryo takes about 3 weeks to develop into a chick. Which of the statements given above is/are correct?

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Consider the following statements regarding asexual reproduction: 1. It involves only a single parent. 2. Hydra reproduces by a method called binary fission. 3. Amoeba reproduces by a method called binary fission. Which of the statements given above is/are correct?

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