Indicate Whether the Following Statements Are True (T) Or False (F). a Zygote is Formed as a Result of Fertilization. ( ) - Science

True or False

Indicate whether the following statement is True (T) or False (F).

A zygote is formed as a result of fertilization. ( )


  • True

  • False



A zygote is formed as a result of fertilization. (T)

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Chapter 9: Reproduction in Animals - Exercises [Page 110]


NCERT Science Class 8
Chapter 9 Reproduction in Animals
Exercises | Q 4.9 | Page 110


Which mode of reproduction gives rise to variation?

Give the importance of variation in survival of species.

Complete the following table to get the differences between asexual and sexual reproduction:

Characteristics Asexual Reproduction Sexual Reproduction
Number of parents involved ........................... ..............................
Type of cells involved Somatic cells Germ cells
Type of cell division ............................ Meiosis and mitosis

What is meant by sexual reproduction?

Name two main processes of sexual reproduction

List six specific characteristics of sexual reproduction.

What is the effect of DNA copying, which is not perfectly accurate, on the reproduction process? How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?

How do organisms, whether reproduced asexually or sexually maintain a constant chromosome number through several generations? Explain with the help of suitable example.

What is amphimixis?

Describe the process of fertilization in human beings.

Choose the most appropriate answer.

Internal fertilization occurs

Indicate whether the following statements are True (T) or False (F).

Oviparous animals give birth to young ones. ( )

Indicate whether the following statement is True (T) or False (F).

Each sperm is a single cell. ( )

Indicate whether the following statement is True (T) or False (F).
A new human individual develops from a cell called gamete. ( )

Indicate whether the following statement is True (T) or False (F).
An embryo is made up of a single cell. ( )

Give two differences between a zygote and a foetus.

In which female reproductive organ does the embryo get embedded?

Differentiate between internal fertilization and external fertilization.

Complete the crossword puzzle using the hints given below.


1. The process of the fusion of the gametes.

6. The type of fertilization in hen.

7. The term used for bulges observed on the sides of the body of Hydra.

8. Eggs are produced here


2. Sperms are produced in these male reproductive organs.

3. Another term for the fertilized egg.

4. These animals lay eggs.

5. A type of fission in amoeba.

What is the name of sex cells (other than gametes)?

What is formed when two gametes fuse?

 Write the various steps involved in the sexual reproduction in plants.

Give reason for the following:

The parents and off-springs of organisms reproducing sexually have the same number of chromosomes.

Distinguish between a gamete and a zygote.

Put a tick mark (✓) against the correct alternative in the following statement:

Amoeba is most commonly reproduced by:

Put a tick mark (✓) against the correct alternative in the following statement:

Which one of the following represents the correct sequence in the life history of a butterfly ?

  1. Egg → Larva → Adult → Pupa
  2. Egg → Pupa → Adult → Larva
  3. Egg → Larva → Pupa → Adult
  4. Egg → Pupa → Larva → Adult

Define the term  Implantation.

What is the function of uterus?

Multiple choice question. Tick (✓) the correct choice:

Butterfly in its development from larva to an adult shows

  1. multiplication
  2. metamorphosis
  3. fertilisation
  4. none of the above

Find the odd one out, give reason:

Testes, epididymis, uterus, vas deferens

Differentiate between the following:

External fertilisation and Internal fertilisation.

Define the term Puberty.

Mention the common method of reproduction in Flatworm.

Name the organ involved in the following:

Fertilisation of ovum by tile sperm.

Describe the various stages in the life cycle of a butterfly.

What is sexual reproduction? List its four significances.

Sketch and label the diagram showing self- and cross-pollination.

In the sexual mode of reproduction, greater diversities are generated.

Answer in one sentence.

Name the endocrine glands involved in maintaining the sex characteristics of males.

Answer in one sentence.

Enlist the external genital organs in the female.

Explain the histological structure of testis.

Answer the following question.

Explain the histological structure of ovary in human.

Answer the following question.

Which is the function of male accessory glands?

Answer the following question.

Explain the following parts of male reproductive system along with labelled diagram showing these parts- Testis, vasa deferentia, epididymis, seminal vesicle, prostate gland and penis.

Describe the histology of testis with help of labelled diagram.

Identify the labels from the given diagram.

Write an account of the seminal vesicle and bulbourethral gland in the male reproductive system.

Which are the components of pollination?

Animals which give birth to young ones directly are named as ______.

Which organs/glands produce eggs and sperms?

In an ovule, meiosis occurs in ______

Due to presence of which of the following chemical component, pollen grains can remain well preserved in fossil?

Testosterone is produced by ____________.

Which of the following is the male accessory gland?

Identify the INCORRECT statement.

Match column -1 with column - II and select the correct option.

  Column - I   Column - II
1. Seminal vesicles a. Membranous urethra
2. Scrotum b. Thermoregulatory
3. Tunica vaginalis c. Fibro muscular pouches
4. Cowper's gland d. Peritoneal covering

Characters that are transmitted from parents to offspring during reproduction show ______ 

______ is the first stage of sexual reproduction.

______ fertilisation takes place in frogs and fish.

The zygote divides repeatedly into a group of cells, which develops into different tissues and organs constituting a full body. This structure is known as ______.

Animals in which an embryo develops outside the body are called ______ animals.

______ lay thousands and sometimes millions of small, soft eggs in water.

The eggshell protects the ______ from the outer environment.

In ______ animals, the development of the embryo takes place inside the body.

What is external fertilisation?

What are oviparous animals?

Which is a better mode of reproduction, sexual or asexual? Why?


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