Practicing Class 9 Science MCQ and Class 9 Science Exploration Chapter 11 MCQ Online Test with Answers Reproduction How Life Continues daily helps in time management.
Class 9 Science Chapter 11 Reproduction How Life Continues MCQ
Reproduction How Life Continues MCQ
Class 9 Science Chapter 11 MCQ online test
Question 1.
Which of the following is NOT a method of vegetative propagation?
(a) Cutting
(b) Grafting
(c) Budding in Hydra
(d) Layering
Answer:
(c) Budding in Hydra
Question 2.
Spores in Rhizopus are produced inside:
(a) Roots
(b) Stems
(c) A sac-like structure on the hyphae
(d) Leaves
Answer:
(c) A sac-like structure on the hyphae
Question 3.
The type of cell division involved in asexual reproduction is
(a) Meiosis
(b) Mitosis
(c) Both
(d) Neither
Answer:
(b) Mitosis
Question 4.
Which of the following plants is propagated by its leaves?
(a) Potato
(b) Ginger
(c) Bryophyllum
(d) Sugarcane
Answer:
(c) Bryophyllum
Question 5.
Which of the following is the correct sequence in sexual reproduction in plants?
(a) Fertilisation, Pollination, Seed formation
(b) Pollination, Fertilisation, Seed formation
(c) Seed formation, Pollination, Fertilisation
(d) Pollination, Seed formation, Fertilisation
Answer:
(b) Pollination, Fertilisation, Seed formation
Question 6.
A flower that contains both stamens and pistil is called:
(a) Incomplete flower
(b) Unisexual flower
(c) Bisexual (complete) flower
(d) Sterile flower
Answer:
(c) Bisexual (complete) flower
Question 7.
Meiosis reduces the chromosome number of a parent cell from:
(a) Haploid to diploid
(b) Diploid to haploid
(c) Diploid to triploid
(d) Haploid to haploid
Answer:
(b) Diploid to haploid
Question 8.
After fertilisation, the ovary of a flower develops into a:
(a) Seed
(b) Fruit
(c) Petal
(d) Sepal
Answer:
(b) Fruit
Question 9.
Which of these plants shows wind pollination?
(a) Hibiscus
(b) Sunflower
(c) Wheat
(d) Marigold
Answer:
(c) Wheat
Question 10.
External fertilisation is commonly seen in:
(a) Mammals
(b) Birds
(c) Fish and frogs
(d) Reptiles
Answer
(c) Fish and frogs
Question 11.
Which of these groups produces the largest number of eggs at a time?
(a) Birds
(b) Mammals
(c) Frogs
(d) Reptiles
Answer:
(c) Frogs
Question 12.
Reptiles and birds lay eggs that are rich in:
(a) Water
(b) Yolk
(c) Salt
(d) Air
Answer:
(b) Yolk
Question 13.
The inner lining of the uterus sheds during:
(a) Ovulation
(b) Fertilisation
(c) Pregnancy
(d) Menstruation
Answer:
(d) Menstruation
Question 14.
Sperm cells are produced in the:
(a) Ovary
(b) Testes
(c) Uterus
(d) Vagina
Answer:
(b) Testes
Question 15.
How many chromosomes are there in a human sperm cell?
(a) 46
(b) 23
(c) 22
(d) 44
Answer:
(b) 23
Question 16.
Copper-T is an example of a/an:
(a) Oral pill
(b) Intra-Uterine Device (IUD)
(c) Condom
(d) Surgical method
Answer:
(b) Intra-Uterine Device (IUD)
Question 17.
The sex chromosomes of a human male are:
(a) XX
(b) XY
(c) YY
(d) XO
Answer:
(b) XY
Reproduction How Life Continues Class 9 Assertion and Reason Questions
Directions:
For Questions number (i) to (vii), two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true, but Reason (R) is false.
(d) Assertion (A) is false, but Reason (R) is true.
Question 1.
Assertion (A): Asexual reproduction leads to genetic variations in offsprings.
Reason (R): Asexual reproduction involves only mitosis and a single parent.
Answer:
Assertion (A) is false, but Reason (R) is true.
Explanation:
Assertion is false because asexual reproduction produces genetically identical offsprings (clones), not variations. Reason is true: it involves only one parent and mitosis.
Question 2.
Assertion (A): Cross-pollination produces more genetic variations than self-pollination.
Reason (R): In cross-pollination, pollen comes from a different plant of the same species.
Answer:
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
Explanation:
Combining genes from two different plants creates more variations than self-pollination.
Question 3.
Assertion (A): Human sperm cells have 23 chromosomes.
Reason (R): Sperms are formed by meiosis, which reduces the chromosome number to half.
Answer:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
Explanation:
Meiosis halves the chromosome number from 46 to 23 in gametes.
Question 4.
Assertion (A): Animals with internal fertilisation generally produce fewer eggs than those with external fertilisation.
Reason (R): Internal fertilisation provides better protection to the developing embryo.
Answer:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
Explanation:
With better protection and higher survival, fewer eggs are enough to keep the population going. The Reason correctly explains the Assertion.
Question 5.
Assertion (A): Menstruation occurs because the egg has been fertilised.
Reason (R): The uterine lining sheds when it is no longer needed.
Answer:
(d) Assertion (A) is false, but Reason (R) is true.
Explanation:
Assertion is false: Menstruation occurs when the egg is not fertilised.
Reason is true: The uterine lining sheds because it is no longer needed to nourish an embryo.
Question 6.
Assertion (A): Wind-pollinated flowers are usually small and dull coloured.
Reason (R): Wind pollination does not depend on attracting animals.
Answer:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
Explanation:
Both are true. Since wind, not animals, carries their pollen, these flowers save energy by not producing colourful petals or nectar. The Reason correctly explains the Assertion.
Question 7.
Assertion (A): The sex of a human baby is determined by the father.
Reason (R): The mother contributes only an X chromosome, while the father can contribute either an X or a Y.
Answer:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
Explanation:
Both are true. The Reason correctly explains why the father determines the sex: his Y chromosome produces a boy, his X chromosome produces a girl.
Reproduction How Life Continues Class 9 Fill in the Blanks
1. New plants that grow from the vegetative parts of a plant are produced by _______.
Answer:
vegetative propagation
2. Asexual reproduction produces offsprings that are called _______.
Answer:
clones
3. In Hydra, a small outgrowth on the parent body is called a _______.
Answer:
bud
4. Spores of fungi are light and are carried by _______.
Answer:
air current
5. The basic cell division behind all asexual reproduction is _______.
Answer:
mitosis
6. The transfer of pollengrains from the anther to the stigma is called _______.
Answer:
pollination
7. The fusion of male and female gametes is called _______.
Answer:
fertilisation
8. The male part of a flower is the _______.
Answer:
stamen
9. The female part of a flower is the _______.
Answer:
pistil
10. After fertilisation, the ovule develops into a _______.
Answer:
seed
11. In frogs and fish, fertilisation is _______.
Answer:
external
12. In mammals, the zygote develops inside the _______body.
Answer:
mother’s
13. The intermediate feeding stage in the life cycle of butterflies is called the _______ stage.
Answer:
larva
14. Mammals feed their young ones with _______ after birth.
Answer:
breast milk
15. Survival of young ones is higher in _______ fertilisation.
Answer:
internal
16. The release of a mature egg from the ovary is called _______.
Answer:
ovulation
17. Pregnancy in humans is divided into three _______.
Answer:
trimesters
18. The scrotum keeps the testes slightly _______ than body temperature.
Answer:
cooler
19. The narrow passage that connects the uterus to the vagina is called the _______.
Answer:
cervix
20. The full form of IVF is _______.
Answer:
In-Vitro Fertilisation
Reproduction How Life Continues Class 9 True or False
1. Asexual reproduction produces offsprings that are genetically different from the parent.
Answer:
False.
Reason: Asexual reproduction involves only one parent and mitosis, so the offsprings are genetically identical to the parent (clones).
2. Bryophyllum reproduces through its leaves.
Answer:
True.
Reason: Tiny plantlets sprout from the leaf margins and grow into new plants.
3. Tissue culture is an example of sexual reproduction.
Answer:
False.
Reason: Tissue culture is a form of vegetative propagation and is therefore asexual reproduction.
4. Wind-pollinated flowers usually have large, sticky pollen grains.
Answer:
False.
Reason: Wind-pollinated flowers have small, light pollen produced in very large numbers. Large, sticky pollen is typical of insect-pollinated flowers.
5. Meiosis helps create genetic variation in sexually reproducing organisms.
Answer:
True.
Reason: During meiosis, chromosomes are randomly sorted into gametes, producing many different combinations.
6. In self-pollination, pollen is transferred between flowers of different plants.
Answer:
False.
Reason: In self-pollination, pollen is transferred within the same flower or between flowers of the same plant. Transfer between different plants is cross-pollination.
7. In internal fertilisation, the chances of survival of young ones are lower than in external fertilisation.
Answer:
False.
Reason: In internal fertilisation, the embryo is better protected inside the female body, so survival is higher.
8. Bird eggs contain more yolk than fish eggs.
Answer:
True.
Reason: Bird eggs contain enough yolk to nourish the embryo until hatching, while fish eggs have very little yolk.
9. A butterfly goes through a larva stage before becoming an adult.
Answer:
True.
Reason: The larva (caterpillar) is a feeding stage that later transforms into a pupa and then the adult butterfly.
10. The sex of a baby is determined by the mother.
Answer:
False.
Reason: The mother always gives an X chromosome. The father gives either an X (making a girl: XX) or a Y (making a boy: XY). So the father determines the sex of the baby.
11. Menstruation occurs when the egg is fertilised.
Answer:
False.
Reason: Menstruation occurs when the egg is not fertilised. The thickened uterine lining is shed because it is no longer needed.
12. Prenatal sex determination is legal in India.
Answer:
False.
Reason: Prenatal sex determination is strictly prohibited by law in India to maintain a healthy sex ratio in society.
Reproduction How Life Continues Class 9 Match the Following
Question 1.
Match the following items given in Column A with that in Column B:
| Column A | Column B |
| (i) Budding | (a) Fungi like Rhizopus |
| (ii) Spore formation | (b) Potato and ginger |
| (iii) Vegetative propagation | (c) Transfer of pollen to stigma |
| (iv) Pollination | (d) Yeast and Hydra |
| (v) Fertilisation | (e) Release of a mature egg from ovary |
| (vi) Ovulation | (f) Fusion of male and female gametes |
Answer:
| Column A | Column B |
| (i) Budding | (d) Yeast and Hydra |
| (ii) Spore formation | (a) Fungi like Rhizopus |
| (iii) Vegetative propagation | (b) Potato and ginger |
| (iv) Pollination | (c) Transfer of pollen to stigma |
| (v) Fertilisation | (d) Fusion of male and female gametes |
| (vi) Ovulation | (e) Release of a mature egg from ovary |
Question 2.
Match the following items given in Column A with that in Column B:
| Column A | Column B |
| (i) Testes | (a) Narrow passage connecting uterus to vagina |
| (ii) Ovary | (b) Production of sperms |
| (iii) Uterus | (c) Carries sperms from testes towards urethra |
| (iv) Vas deferens | (d) Bag – like organ where foetus develops |
| (v) Fallopian tube | (e) Production of eggs and female hormones |
| (vi) Cervix | (f) Usual site of fertilisation |
Answer:
| Column A | Column B |
| (i) Testes | (b) Production of sperms |
| (ii) Ovary | (e) Production of eggs and female hormones |
| (iii) Uterus | (d) Bag – like organ where foetus develops |
| (iv) Vas deferens | (c) Carries sperms from testes towards urethra |
| (v) Fallopian tube | (f) Usual site of fertilisation |
| (vi) Cervix | (a) Narrow passage connecting uterus to vagina |
MCQ On Reproduction How Life Continues Class 9 for Practice
Choose the correct option in the following questions
Question 1.
Which of the following is an example of asexual reproduction?
(a) Seed germination
(b) Cross-pollination
(c) Fertilisation
(d) Budding in Hydra
Question 2.
The part of the flower that develops into a fruit is:
(a) Sepal
(b) Petal
(c) Anther
(d) Ovary
Question 3.
Meiosis produces:
(a) Two identical cells
(b) Four cells with half the chromosome number
(c) Two cells with double chromosomes
(d) Four identical cells
Question 4.
Which is the usual site of fertilisation in human females?
(a) Uterus
(b) Ovary
(c) Oviduct
(d) Vagina
Question 5.
Pollen grains of wind-pollinated flowers are:
(a) Large and sticky
(b) Brightly coloured and fragrant
(c) Small, light, and produced in huge numbers
(d) Heavy and spiny
Question 6.
The number of chromosomes in a human egg cell is:
(a) 46
(b) 23
(c) 44
(d) 22
Question 7.
Copper-T is an example of a/an:
(a) Oral pill
(b) IUD
(c) Condom
(d) Surgical method
Question 8.
Bryophyllum reproduces through its:
(a) Roots
(b) Stems
(c) Leaves
(d) Seeds
Question 9.
The menstrual cycle in human females typically repeats every:
(a) 7 days
(b) 14 days
(c) 21 to 35 days
(d) 50 days
Question 10.
Which of these animals shows external fertilisation?
(a) Human
(b) Bird
(c) Frog
(d) Lizard
Assertion-Reason Questions
Directions: For Questions number (i) to (v), two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true, but Reason (R) is false.
(d) Assertion (A) is false, but Reason (R) is true.
Question 1.
Assertion (A): Vegetatively propagated plants are more vulnerable to diseases.
Reason (R): They lack genetic variations because they are clones of the parent plant.
Question 2.
Assertion (A): Flowers pollinated by insects usually have brightly coloured petals.
Reason (R): Bright colours help attract insect pollinators.
Question 3.
Assertion (A): The sex of a baby is determined by the father.
Reason (R): The father contributes either an X or a Y chromosome.
Question 4.
Assertion (A): Condoms help prevent both pregnancy and STIs.
Reason (R): Condoms act as a physical barrier.
Question 5.
Assertion (A): Fish produce hundreds to thousands of eggs at a time.
Reason (R): Fish has internal fertilisation.
Fill in the Blanks
1. The offsprings produced by asexual reproduction are called _______.
2. In flowering plants, the male gametes are present inside the _______.
3. The narrow passage connecting the uterus to the vagina is called the _______.
4. The developing embryo from the ninth week of pregnancy onwards is called a _______.
5. Cross-pollination leads to more _______ than self-pollination.
6. The pair of sex chromosomes in a human female is _______.
7. The tube that carries sperms from the testes towards the urethra is called _______.
State whether the statements given below are True or False
1. Grafting is a method of sexual reproduction in plants.
2. Human egg cells are as motile as sperms.
3. Ovulation occurs around day 14 in a typical 28-day menstrual cycle.
4. Reptiles show external fertilisation.
5. The scrotum keeps the testes at normal body temperature.
6. All offsprings produced by sexual reproduction are exactly alike.
7. A zygote is formed by the fusion of two gametes.
Match the columns
Question 1.
Match the following flower parts with their functions:
| Column A (Flower parts) | Column B (Functions) |
| 1. Sepal | (a) Produces pollen grains |
| 2. Petal | (b) Contains ovules |
| 3. Anther | (c) Protects the flower bud |
| 4. Ovary | (d) Attracts pollinators |
| 5. Stigma | (e) Receives pollen grains |
Question 2.
Match the following animal with its reproductive feature:
| Column A (Animal) | Column B (Reproductive Feature) |
| 1. Frog | (a) Internal fertilisation |
| 2. Bird | (b) Budding |
| 3. Yeast | (c) External fertilisation |
| 4. Human | (d) Spore formation |
| 5. Fungus | (e) Lays eggs with plenty of yolk |