Indicate Whether the Following Statements Are True (T) Or False (F). Each Sperm is a Single Cell. ( ) - Science

True or False

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

Each sperm is a single cell. ( )


  • Ture

  • False



Each sperm is a single cell. (T)

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


NCERT Science Class 8
Chapter 9 Reproduction in Animals
Exercises | Q 4.2 | 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

What is amphimixis?

Describe the process of fertilization in human beings.

Choose the most appropriate answer.

Internal fertilization occurs

Choose the most appropriate answer.

The number of nuclei present in a zygote is

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).
A new human individual develops from a cell called gamete. ( )

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

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

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.

What are gametes?

Describe the various steps involved in the sexual reproduction in animals. Draw labelled diagrams to show the fertilisation of an ovum (or egg) by a sperm to form a zygote

The advantage that internal fertilisation has over external fertilisation is that in internal fertilisation :
(a) new off-springs are exactly like the parent
(b) production of large numbers of gametes is unnecessary
(c) copulation and fusion of gametes is passive
(d) fewer individuals are produced

The number of chromosomes in parents and offsprings of a particular species remains constant due to :
(a) doubling of chromosomes after zygote formation
(b) halving of chromosomes during gamete formation
(c) doubling of chromosomes after gamete formation
(d) halving of chromosomes after gamete formation

The correct sequence of organs in the male reproductive system for the transport of sperms is:
(a) testis → vas deferens → urethra
(b) testis → ureter → urethra
(c) testis → urethra → ureter
(d) testis → vas deferens → ureter

One of the following process does not lead to the formation of clones. This is :
(a) fission
(b) fertilisation
(c) fragmentation
(d) tissue culture

Distinguish between the following pair of terms:

Sexual reproduction and asexual reproduction.

Define the term  Implantation.

What is the function of uterus?

How does a single called fertilized egg grows into an adult human body?

Differentiate between the following:

Sperm and Ovum

Differentiate between the following:

External fertilisation and Internal fertilisation.

Define the term Puberty.

Mention the common method of reproduction in Flatworm.

Mention the common method of reproduction in Start fish.

Adolesecence is considered a critical stage in the life of boys and girls. Explain this statement.

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

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

Answer in one sentence.

Which glands contribute fluids to the semen?

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?

Long answer question.

Describe female reproductive system of human.

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?

What are the different stages of sexual reproduction?

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.

The eggshell protects the ______ from the outer environment.

Name the two ways by which fertilisation in animals takes place.

What are oviparous animals?

Explain the two types of fertilization.

Explain the formation of the embryo.

Reproduction is essentially a phenomenon that is not for survival of an individual but for the stability of a species. Justify.

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

Explain how stability of the DNA of the species is ensured in sexually reproducing organisms.


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