Chapter Practice

cut pieces of the two Planaria worms could

PART 1

regenerate to form the complete worm ?

Objective Questions

●

Multiple Choice Questions

1. Which of the following statement is correct

regarding DNA copying?

I. It is a basic event in reproduction.

(I)

(II)

II. Two copies of DNA are produced in a reproducing

(a) Only P

cell.

(b) R and S

III. Copies generated are always identical.

IV. It is accompanied by the creation of an additional

(d) P, Q, R and S

cellular apparatus.

Codes

Identify the organisms A and B and mode of asexual

(a) I, II and IV

(b) I, II and III

reproduction exhibited by them.

(d) II and IV

The diagram given below shows

(a) A—Bryophyllum, Vegetative propagation

B—Plasmodium, Multiple fission

(b) A—Plasmodium, Multiple fission

B—Bryophyllum, Vegetative propagation

(a) binary fission in Amoeba

(b) multiple fission in Plasmodium

B—Plasmodium, Binary fission

(d) A—Hydra, Budding

(d) binary fission in Leishmania

B—Rhizopus, Spore formation

Asexual reproduction takes place through budding

Observe the diagram of pistil of a flower.

(NCERT)

(a) Amoeba

(b) Yeast

(d) Leishmania

An organism which can completely regenerate from

its cut body parts is

(a) Paramecium

(b) Amoeba

(d) Rhizopus

A Planaria worm is cut horizontally from the middle

into two halves P and Q. Another Planaria worm is

cut vertically into two halves R and S. Which of the

Match the labelling referred in Column I and

correlate with the function in Column II.

Column I

Column II

Column I

Column II

1. Female germ cell.

1. Produce ovum

2. Receptor of pollen grains.

2. Site of fertilisation

3. Pollen grain travels through it.

3. Site of implantation

4. It ripens as fruit.

4. Blood and mucus comes out

Codes

A B C D

(a)

(b)

(c)

(d)

(c)

12.

Eggs are produced in ovary

(d)

Carefully study the diagram of flower with labels A to

Released in Fallopian tube

D. Select the option which gives correct identification

and main function and/or characteristic.

Fertilised

Unfertilised

Identify the correct option from the given table which

represents the correct fate of egg occurring at X and Y,

respectively.

Pregnancy Menstruation

(a)

(a) A—Anther-Formation of ovules

(b) "

(b) B—Stigma-Receives pollen grains

(c)

(d) "

(d) D—Filament-Lifts anther to disperse pollen grains

13.

The figure given below shows male reproductive

In a flower, the parts that produce male and female

system with labels (i) to (iv).

gametes (germ cells) are

(NCERT Exemplar)

Identify the correct label with its functions.

(a) stamen and anther

(b) filament and stigma

(d) stamen and style

(i)

10.

Which of the following is not a secondary

(ii)

reproductive organ?

(iii)

(a) Fallopian tube

(b) Uterus

(d) Vagina

11.

The figure given below shows a female reproductive

(iv)

system in humans with labels A to D.

(a)

(i) Bladder-It is essential for the mobility of sperms

(b) (ii) Scrotum-It transfers sperm into the vagina of female

(c)

(iii) Urethra-It is a common passage for both the sperm

and urine

(d) (iv) Testis-Its secretion form 20-30% of semen

14.

Which of the following option contains male

reproductive organs of humans?

(a) Seminal vesicle, uterus and penis

(b) Prostate gland, penis and vas deferens

(d) Cervix, scrotum and seminal vesicle

15.

Which of the following is not the function of

21. Assertion The uterus prepares itself every month to

testosterone?

receive a fertilised egg.

(a) Regulation of characters of puberty in boys

Reason The ovary releases one egg every month.

(b) Regulation of production of sperms

22. Assertion AIDS is an incurable and a fatal bacterial

infection.

(d) Regulation of metabolism for body growth

Reason It suppresses the immune system of the

16.

What happens to a man, when the labelled part X is

body.

cut?

^● Case Based MCQs

23.

Read the following and answer the questions from (i)

to (v) given below

Farmers, gardeners and horticulturists have

developed various artificial methods of vegetative

propagation for growing plants in gardens and

nurseries. A very simple method of propagation

involves a piece of the parent plants stem with nodes

(a) Sperm ejaculation stops

and internodes is placed in moist soil.

(b) Testosterone production stops

This grows into a new plant. In grafting, the cutting

of a plants are attached to the stem of a rooted plant.

(d) Semen formation stops

The attached cutting becomes a part of the rooted

17.

Which among the following diseases is not sexual

plant, draws nutrition from it and grows roots at the

transmitted?

(NCERT Exemplar)

joint.Now if it isseparated,it growsinto a new plant.

(a) Syphilis

In layering, one or more branches of the parent plant

(b) Hepatitis

are bent close to the ground and covered with moist

soil. The covered portions grow roots and develop

(d) Gonorrhoea

into new plants.

^● Assertion-Reasoning MCQs

(i) Which part of plant is more suitable for vegetative

propagation?

Direction (Q. Nos. 18-22) For given questions, two

(a) Stem

(b) Leaves

statements are given, one labelled Assertion (A) and

(d) Bulbils

the other labelled Reason (R). Select the correct

(ii) Choose the odd one out.

answer to these questions from the codes (a), (b), (c)

(a) Potato

(b) Sugarcane

and (d) as given below.

(d) Wheat

(a) Both A and R are true and R is the correct explanation

(iii) In which type of artificial propagation, stock and

of A

scion are involved?

(b) Both A and R are true, but R is not the correct

(a) Tissue culture

explanation of A

(b) Cuttings

(d) A is false, but R is true

(d) Layering

18. Assertion Individuals produced by asexual

(iv) Which of the following statement is correct about

reproduction are known as clones.

artificial vegetative propagation of plants?

Reason They are known as clones because they are

(a) We get seedless plants by this method

genetically identical.

(b) The new plants produced by this method are similar

19. Assertion Ureter forms the common passage for both

to the parent plants

the sperms and urine.

(d) All of the above

Reason It never carries both of them at the same

(v) Which of the following method is suitable for

time.

combining the desirable characters of two plants

20. Assertion Vagina is also called as birth canal.

together in a single plant?

Reason During birth, the baby passes through the

(a) Layering

(b) Cutting

vagina.

(d) All of these

24.

Read the following and answer the questions from (i)

What is a clone? Why do offspring formed by asexual

to (v) given below

reproduction exhibit remarkable similarity?

(NCERT Exemplar)

The uterus or womb is a hollow, pear-shaped organ

in a women’s lower stomach between the bladder and

Colonies of yeast fail to multiply in water, but multiply

rectum. It sheds the lining each month during

in sugar solution. Give one reason for this.

menstruation. A fertilised egg becomes implanted in

(NCERT Exemplar)

the uterus and the foetus develops.

Illustrate with example, the division and fragmentation

method of reproduction in living organisms.

List two advantages of vegetative propagation over other

modes of reproduction.

Name a plant in which layering produces a new plant.

Write one main difference between asexual and sexual

mode of reproduction. Which species is likely to have

comparatively better chances of survival, the one

reproducing asexually or the one reproducing sexually?

Give reason to justify your answer.

(CBSE 2018)

(i) Name the parts labelled as A and C.

In tobacco plant, the male gametes have twenty four

(a) Umbilical cord and placenta

chromosomes. What is the number of chromosomes in

(b) Umbilical cord and uterine wall

the female gamete? What is the number of

chromosomes in the zygote?

(NCERT Exemplar)

(d) Cytoplasm and umbilical cord

10.

Differentiate between self-pollination and cross-

(ii) What determines the sex of a child?

pollination.

(a) Chromosome content of the ovum

(b) Chromosome content of the sperm

11.

In a bisexual flower inspite of the young stamens being

removed artificially, the flower produces fruit. Provide

(d) Number of days between fertilisation and implantation

a suitable explanation for the above situation.

(iii) Which of the following is embedded in the uterine

(NCERT Exemplar)

wall ?

12.

Differentiate between unisexual and bisexual flowers

(a) Zygote

(b) Embryo’s head

and give one example of each.

(d) Eggs

13.

(i) List two reasons for the appearance of

(iv) Which of the following is a temporary method of

variations among the progeny formed by sexual

family planning ?

reproduction.

(a) Vasectomy

(b) Tubectomy

(ii)

(d) Both (a) and (b)

(v) Union of male and female gametes take places in

(a) uterus

(b) ovary

(d) oviduct

PART 2

Subjective Questions

(CBSE 2016)

^● Short Answer Type Questions

(a) Name the part marked as A in the diagram.

1. What is the importance of DNA copying in

(b) How does A reach part B?

reproduction?

(NCERT)

2. Why is variation beneficial to the species, but not

(d) What happens to the part marked as D after

necessary for the individual?

fertilisation is over?

14.

(i) Draw a diagram showing germination of pollen on

28. If a woman is using a copper-T, will it help in

stigma of a flower and mark on it the following

protecting her from sexually transmitted diseases ?

organs/parts

(CBSE 2020)

(NCERT)

29. Write a short note on family planning.

(a) Pollen grain

(b) Pollen tube

(d) Female germ cell

30.

(i) ‘Use of a condom is beneficial for both the sexes

(ii) State the significance of pollen tube.

involved in a sexual act.’ Justify this statement

giving two reasons.

(iii) Name the parts of flower that develop after

fertilisation into

(ii) How do oral contraceptives help in avoiding

pregnancies?

(a) Seed

(b) Fruit

(iii) What is sex selective abortion? How does it

15. Why cannot fertilisation take place in flowers if

affect a healthy society? (State any one

pollination does not occur?

(NCERT Exemplar)

consequence).

(CBSE 2020)

16. How are general growth and sexual maturation different

31. What are the various ways to avoid pregnancy?

from each other?

(NCERT Exemplar)

Elaborate any one method.

(NCERT Exemplar)

17. Draw the human female reproductive system and label

the following parts

^● Long Answer Type Questions

(i) Which organ produces ovum?

32.

Reproduction is essentially a phenomenon that is

(ii) Where does fertilisation take place?

not for the survival of an individual, but for the

(iii) Where does implantation of embryo take place?

stability of a species. Justify.

(NCERT Exemplar)

(CBSE 2015, 2019)

33.

‘Reproduction helps in providing stability to

18. List two functions of ovary of female reproductive

population of a species’. Justify this statement.

system.

(CBSE 2016)

34.

(i) Name the mode of reproduction of the

19. A newly married couple wants to conceive as quickly

following organisms and state the important

as possible. What is the first sign of pregnancy shown

feature of each mode

by the woman ?

(a) Planaria

(b) Hydra

20. What changes are observed in the uterus if fertilisation

does not occur?

(NCERT Exemplar)

(ii) We can develop new plants from the leaves of

21. How does the embryo get nourishment inside the

Bryophyllum. Comment.

mother’s body?

(NCERT, CBSE 2015)

35.

Explain the fertilisation process in plant with the

22. What is the function of the umbilical cord ?

help of a labelled diagram of a longitudinal section of

a flower.

23. Why are testes located outside the abdominal cavity?

36.

Define pollination. Explain the different types of

24. Trace the path of sperm during ejaculation and mention

pollination. List two agents of pollination. How does

the glands associated with the male reproductive system

suitable pollination lead of fertilisation? (CBSE 2019)

and their functions.

(NCERT Exemplar)

37.

Distinguish between pollination and fertilisation.

25. What would be the ratio of chromosome number

Mention the site and product, of fertilisation in a

between an egg and its zygote? How is the sperm

flower. Draw a neat, labelled diagram of a pistil

genetically different from the egg?

showing pollen tube growth and its entry into the

26. State any two methods of contracting an STD other

ovule.

(NCERT Exemplar)

than the sexual contact.

38.

Trace the change that takes place in a flower from

27. How can people practice safe sex to avoid contracting an

gamete formation to fruit formation.

(CBSE 2020)

STD ?

39. Based on the given diagram answer the questions

43. Give reasons.

given below.

(i) Placenta is extremely essential for foetal

development.

(ii) Blocking of vas deferens prevents pregnancy.

(iii) Wind acts as a pollinating agent.

Bladder

(iv) Use of condoms prevents pregnancy.

(v) Blocking of Fallopian tubes prevents pregnancy.

44. List four points of significance of reproductive health

in a society. Name any two areas related to the

reproductive health which have improved over the

past 50 years in our country.

^● Case Based Questions

45.

Read the following and answer the questions from

(i) to (v) given below

Salman soaked a few seeds of Bengal gram (chana)

and kept them overnight. Next morning, he drained

Testis

the excess water and covered the seeds with a wet

(i)

Label the parts A, B, C and D.

cloth. He then left the seeds for a day.

(ii)

Name the hormone secreted by testis and

After one day, he opened the seeds into two parts

mention its role.

and carefully observe the different parts.

(iii)

State the functions of B and C in the process of

reproduction.

(CBSE 2020)

40.

(i)

Identify the given diagram. Name the parts

labelled as A to E.

(CBSE 2019)

(i) Which part of the flower develops into seed?

(ii) Where do the energy required for germination of

seeds come from?

(iii) Which part of the seed emerges out the first?

(iv) Define germination.

(v) What are the necessary conditions for seed

germination?

(ii)

What is contraception? List three advantages of

46.

Read the following and answer the questions from (i)

adopting contraceptive measures.

to (v) given below

41.

(i)

Write the function of following parts in human

As soon as boys and girls reach adolescent age,

female reproductive system.

certain changes start happening in their bodies

(a) Ovary

(b) Oviduct

under the influence of sex hormones produced in

their bodies. These changes are mostly related to

(ii)

Describe in brief the structure and function of

height, size, voice pitch, physical attributes, etc.

placenta.

(CBSE 2018)

The table below shows the average height of boys

42. Trace out the movement and fate of egg in female

and girls upto the age of 18 years.

body.

Age/Years

Average Height / cm

Testicles are also part of the endocrine system.

Boys

Girls

(at birth)

103

110

118

117

125

122

131

128

(i) Name the organ that acts as both endocrine and

135

133

exocrine gland?

(ii) How is the sperm genetically different from the egg?

141

140

(iii) What is semen?

145

146

(iv) A man wants a surgical operation for family planning.

150

153

Which part of his reproductive system needs to be

156

158

operate?

164

161

(v) What would be the ratio of chromosome number

169

162

between an egg and its zygote?

172

162

48.

Read the following and answer the questions from

174

162

(i) to (v) given below

175

162

The term Sexually Transmitted Disease (STD) refers to a

condition passed from one person to another through

(i)

State the changes happening in adolescent boys

sexual contact. However, it is not the only way STDs can

and girls.

be transmitted.

(ii)

When does the most rapid growth take place?

An STD develops without any symptoms early on, or if

(iii)

The increase in height in girls almost ceases at

any symptoms appear they are often dismissed as regular

what age?

infections.

(iv)

Significant spurt in increase of height of boys

occurs at what the age?

At present, there are several type of STDs known which

are caused by different type of pathogens.

(v)

What are the changes that are common in both

boys and girls at the age of adolescence?

Some of these STDs are curable, while other are not. The

only full proof way of avoiding an STD is to practice safe

47. Read the following and answer the questions from

sex.

(i) to (v) given below.

(i) Give two examples of STDs.

The male has reproductive organs or genitals

(ii) Do you think like viruses, bacteria can also cause an

that are both inside and outside the pelvis. The

STD? Give an example.

male genitals include the testicles, the duct

(iii) Name a method of contraception which protects us from

system, accessory glands and the penis.

acquiring sexually transmitted diseases?

In male who has reached sexual maturity, the

(iv) What are IUCD? Given one example.

two oval-shaped testicles make and store

millions of tiny sperm cells.

(v) Emergency contraceptives may prevent pregnancy if

used within 72 hrs of …, … .