Reproduction
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Compare asexual and sexual reproduction with examples in plants and animals
SubtopicCompare asexual and sexual reproduction with examples in plants and animals under Reproduction for Grade 9 CBSE.
Preview questions (no answers)
- 1.
The Carpel (or Pistil) consists of which three parts?
A.Stigma, Style, and Ovary
B.Anther, Filament, and Stigma
C.Petal, Sepal, and Stamen
D.Root, Stem, and Leaf
- 2.
A cell formed by the fusion of male and female gametes is (diploid). This cell is the:
A.Sperm
B.Egg
C.Zygote
D.Pollen
- 3.
Which of the following is true for asexual reproduction?
A.Requires gametes
B.Involves two parents
C.Produces variations
D.Offspring are identical to the parent
- 4.
Why do organisms reproduce?
A.To stay alive individually
B.To maintain the continuity of the species
C.To produce energy
D.To breathe
- 5.
The following diagram illustrates two different modes of reproduction, Mode A and Mode B. Based on the diagram, which statement provides a correct comparison of these two modes?
A.Mode A involves the fusion of specialized germ cells, making it a slower but more diverse process.
B.Mode B allows for the rapid production of offspring that are genetically identical to the parents.
C.Mode A can be more advantageous in a stable, unchanging environment because it preserves well-adapted parental traits.
D.Mode B is the primary method used by organisms like to produce spores in large numbers.
- 6.
Asexual reproduction involves mitosis, while sexual reproduction involves which type of cell division to produce gametes?
A.Mitosis only
B.Meiosis
C.Binary fission
D.Budding
- 7.
Which of the following is true for both and ?
A.They both reproduce by binary fission
B.They both can reproduce through regeneration
C.They both only reproduce sexually
D.They both lack DNA
- 8.
In the human female, if the 'Copper-T' IUD is placed in the uterus, how does it primarily prevent pregnancy?
A.By preventing the release of eggs from the ovary.
B.By acting as a physical barrier to the entry of sperm into the uterus.
C.By creating an environment that is toxic to sperm and preventing implantation of a fertilized egg.
D.By surgically cutting the fallopian tubes.
- 9.
Compare the offspring produced by through budding and through sexual reproduction. Which offspring would likely survive a sudden increase in water salinity?
A.Offspring from budding, as they are clones of a successful parent.
B.Offspring from sexual reproduction, as genetic recombination might provide salt-tolerance traits.
C.Both would have the exact same chance of survival.
D.Neither, as cannot survive changes in salinity.
- 10.
Which of the following is a potential risk or ethical concern specifically associated with 'uncontrolled' human population growth?
A.Increased genetic diversity in the species.
B.Pressure on natural resources and declining standards of living.
C.The evolution of a new human species.
D.Total extinction of the human race within 10 years.
Download the worksheet for Reproduction - Compare asexual and sexual reproduction with examples in plants and animals to practice offline. It includes additional chapter-level practice questions.
Explain pollination, fertilisation, and seed/fruit formation in flowering plants
SubtopicExplain pollination, fertilisation, and seed/fruit formation in flowering plants under Reproduction for Grade 9 CBSE.
Preview questions (no answers)
- 1.
The stalk that supports the anther is the:
A.Style
B.Filament
C.Ovary
D.Stigma
- 2.
Which of these is the correct sequence of events in plant reproduction?
A.Fertilisation -> Pollination -> Seed formation
B.Pollination -> Fertilisation -> Seed formation
C.Seed formation -> Pollination -> Fertilisation
D.Pollination -> Seed formation -> Fertilisation
- 3.
What is the primary function of a seed?
A.To produce food for the plant
B.To protect and disperse the embryo
C.To absorb water from the soil
D.To attract insects
- 4.
Which part of the flower is often scented to attract pollinators?
A.Sepals
B.Petals
C.Roots
D.Stalk
- 5.
Based on the provided flowchart representing the relationship between floral components and seed formation, what is the minimum number of pollen grains and ovules required to produce a fruit that contains exactly 10 seeds?
A.1 Pollen grain and 10 Ovules
B.5 Pollen grains and 5 Ovules
C.10 Pollen grains and 10 Ovules
D.10 Pollen grains and 1 Ovule
- 6.
The diagram shows the growth of a pollen tube from a pollen grain on the stigma towards the ovule. This directional growth, which occurs in response to chemical secretions from the ovule, is an example of which biological phenomenon?
A.Chemotropism
B.Hydrotropism
C.Thigmotropism
D.Geotropism
- 7.
The scar on the seed coat where the seed was attached to the fruit wall is called the:
A.Micropyle
B.Hilum
C.Radicle
D.Plumule
- 8.
What is the primary role of the 'Suspensor' during embryo development?
A.To store food for the embryo
B.To push the developing embryo into the endosperm for nutrition
C.To form the first leaves of the plant
D.To absorb water for germination
- 9.
Identify the 'odd one out' regarding the floral parts that wither and fall off after fertilisation in most plants.
A.Sepals
B.Petals
C.Stamens
D.Ovary
- 10.
The 'Coleorhiza' is a protective sheath covering which part of the monocot embryo?
A.Plumule
B.Radicle
C.Scutellum
D.Endosperm
Download the worksheet for Reproduction - Explain pollination, fertilisation, and seed/fruit formation in flowering plants to practice offline. It includes additional chapter-level practice questions.
Describe human reproductive systems, gamete formation, fertilisation, and embryo development
SubtopicDescribe human reproductive systems, gamete formation, fertilisation, and embryo development under Reproduction for Grade 9 CBSE.
Preview questions (no answers)
- 1.
Which of the following occurs immediately after fertilization?
A.Implantation
B.Formation of Zygote
C.Ovulation
D.Birth
- 2.
What is the main purpose of the sperm's middle piece?
A.To hold the nucleus
B.To produce energy for movement
C.To penetrate the egg
D.To detect the egg
- 3.
How many chromosomes are present in a human zygote?
A.23
B.46
C.22
D.44
- 4.
The fluid-filled sac that protects the developing foetus is the:
A.Yolk sac
B.Amniotic sac
C.Scrotum
D.Cervix
- 5.
In the human female reproductive system, the zygote travels from the fallopian tube toward the uterus. During this journey, it undergoes a transformation as shown in the flowchart below. Which of the following statements accurately describes the biological characteristics of 'Stage B'?
A.It represents the foetal stage where major body organs and limbs have become clearly identifiable.
B.It is the embryo stage, which is a multicellular structure formed by the repeated division of the zygote.
C.It is the unicellular stage where the sperm and egg nuclei have just fused but no division has occurred.
D.It is the ovulation stage where the follicle ruptures to release a mature egg into the oviduct.
- 6.
In human females, the production of eggs usually stops around the age of 45-50. This stage is called:
A.Menarche
B.Menopause
C.Adolescence
D.Puberty
- 7.
A sperm cell consists of which of the following three main parts?
A.Head, thorax, abdomen
B.Head, middle piece, tail
C.Nucleus, cytoplasm, wall
D.Cell body, axon, dendrite
- 8.
If a zygote has an XX chromosomal pair, which of the following is true?
A.The offspring will be a male
B.The offspring will be a female
C.The offspring will have 47 chromosomes
D.The zygote was formed by two sperm cells
- 9.
Which part of the female reproductive tract is lined with cilia to help move the egg towards the uterus?
A.Vagina
B.Cervix
C.Fallopian tube
D.Ovary
- 10.
What is the main advantage of sexual reproduction over asexual reproduction in terms of evolution?
A.It is a faster process
B.It produces offspring that are identical to the parents
C.It leads to genetic variation in the offspring
D.It requires only one parent
Download the worksheet for Reproduction - Describe human reproductive systems, gamete formation, fertilisation, and embryo development to practice offline. It includes additional chapter-level practice questions.
Discuss reproductive health, contraception, and safe practices
SubtopicDiscuss reproductive health, contraception, and safe practices under Reproduction for Grade 9 CBSE.
Preview questions (no answers)
- 1.
How can one maintain hygiene during adolescence?
A.Not bathing daily
B.Wearing clean clothes
C.Ignoring sweat
D.Eating only sweets
- 2.
Which of the following is a viral disease?
A.Syphilis
B.Gonorrhea
C.AIDS
D.Cholera
- 3.
Why is education about reproductive health important for teenagers?
A.To confuse them
B.To provide correct information and prevent myths
C.To stop them from growing
D.To make them surgeons
- 4.
Which method involves tying the vas deferens?
A.Tubectomy
B.Vasectomy
C.IUCD
D.Barrier
- 5.
Which of the following is an example of a barrier method used by females?
A.Condom
B.Copper-T
C.Diaphragm
D.Oral Pills
- 6.
Why is it important to complete the full course of antibiotics if prescribed for a bacterial STD like Gonorrhoea?
A.To make the medicines last longer
B.To prevent the bacteria from becoming resistant
C.To increase the cost of treatment
D.Antibiotics are not used for STDs
- 7.
Which of the following can be a symptom of a sexually transmitted infection?
A.Fever and chills only
B.Persistent cough
C.Burning sensation during urination and unusual discharge
D.Loss of appetite only
- 8.
Which hormone is primarily responsible for the thickening of the uterine lining, a process that is often manipulated by contraceptives?
A.Adrenaline
B.Progesterone
C.Insulin
D.Thyroxine
- 9.
Which of the following is an example of a viral STI that currently has no permanent cure, only management of symptoms?
A.Gonorrhea
B.Syphilis
C.AIDS
D.Chlamydia
- 10.
Why is 'Reproductive Health' considered a total well-being aspect?
A.It only refers to the absence of diseases in the reproductive organs.
B.It includes physical, emotional, behavioral, and social aspects of reproduction.
C.It is only relevant during the years of active childbearing.
D.It focuses solely on the number of children a person has.
Download the worksheet for Reproduction - Discuss reproductive health, contraception, and safe practices to practice offline. It includes additional chapter-level practice questions.
Asexual Reproduction
SubtopicAsexual Reproduction under Reproduction for Grade 9 CBSE.
Preview questions (no answers)
- 1.
Plants raised by vegetative propagation are genetically:
A.Similar to the parent
B.Different from the parent
C.Hybrids
D.Weak
- 2.
The main benefit of asexual reproduction for a plant is that it:
A.Increases genetic diversity
B.Allows for rapid colonization of an environment
C.Creates new species quickly
D.Uses more energy
- 3.
What is the primary mode of reproduction in Ginger?
A.Spore formation
B.Vegetative propagation by stem (rhizome)
C.Budding
D.Multiple fission
- 4.
In binary fission, the division of the nucleus is followed by the division of:
A.Cell wall
B.Cytoplasm
C.Ribosome
D.Vacuole
- 5.
Vegetative propagation is an asexual method where new plants grow from the vegetative parts of the parent. Although both Potato and Sweet Potato are underground storage organs, how do they differ in their method of vegetative propagation?
A.Potato is a modified stem (tuber) that grows from 'eyes', while Sweet Potato is a modified root.
B.Potato is a modified root, while Sweet Potato is a modified stem that grows from nodes.
C.Both are modified stems, but only the Sweet Potato can produce adventitious buds for reproduction.
D.Both are modified roots, but only the Potato possesses the specialized tissues needed for fragmentation.
- 6.
Binary fission is a process where a parent cell divides into two daughter cells. When comparing this process in and , which of the following is a key difference regarding their plane of division?
A.Both organisms divide in any plane, but only forms a protective cyst first.
B.can divide in any plane, while divides in a specific longitudinal plane.
C.divides in any plane, while divides only along a transverse plane.
D.undergoes multiple fission in unfavorable conditions, whereas only reproduces sexually.
- 7.
Asexual reproduction is more common in:
A.Complex animals
B.Lower plants and animals
C.Birds
D.Mammals
- 8.
Why is the progeny of an asexually reproducing organism often referred to as a 'clone'?
A.Because they are produced in a laboratory.
B.Because they are morphologically and genetically identical to the parent.
C.Because they have only half the number of chromosomes.
D.Because they can only survive in the presence of the parent.
- 9.
In , where are the 'Adventitious Buds' located?
A.On the surface of the roots.
B.In the notches along the margin of the leaf.
C.Inside the fruit.
D.At the tip of the main stem.
- 10.
Identify the incorrect statement regarding asexual reproduction:
A.It is generally faster than sexual reproduction.
B.It produces clones of the parent organism.
C.It involves the fusion of male and female gametes.
D.It is common in single-celled organisms and simple plants/animals.
Download the worksheet for Reproduction - Asexual Reproduction to practice offline. It includes additional chapter-level practice questions.
Sexual Reproduction
SubtopicSexual Reproduction under Reproduction for Grade 9 CBSE.
Preview questions (no answers)
- 1.
In the human female, if the egg is fertilized, it gets implanted in the uterus after how many days approximately?
A.1 day
B.7 days
C.14 days
D.28 days
- 2.
Which of the following is a barrier method that also protects against STDs?
A.Copper-T
B.Condoms
C.Tubectomy
D.Oral pills
- 3.
Which part of the flower receives pollen grains during pollination?
A.Style
B.Stigma
C.Anther
D.Ovary
- 4.
The process of releasing a mature egg from the ovary is called:
A.Fertilization
B.Menstruation
C.Ovulation
D.Implantation
- 5.
Sexual reproduction in many complex organisms involves the fusion of two distinct types of germ-cells. Based on the characteristics described in the diagram, which statement accurately identifies Cell and Cell ?
A.Cell is the male gamete and Cell is the female gamete.
B.Cell is the egg cell because it is highly motile to reach the food source.
C.Cell is the female gamete and Cell is the male gamete.
D.Both cells are diploid and are formed through the process of vegetative propagation.
- 6.
In flowering plants, the process of fertilization triggers specific developmental changes in various floral parts. Based on the flowchart below, identify the correct structures represented by and after fertilization has occurred.
A.: Fruit; : Seed
B.: Seed; : Fruit
C.: Embryo; : Seed
D.: Seed coat; : Ovule
- 7.
The part of the flower that often attracts insects for pollination is the:
A.Sepal
B.Petal
C.Stamen
D.Carpel
- 8.
What is the immediate product of the fusion of a male and female gamete?
A.Embryo
B.Fetus
C.Zygote
D.Spore
- 9.
Which of the following is NOT a part of the female reproductive system in a human being?
A.Ovary
B.Uterus
C.Vas deferens
D.Fallopian tube
- 10.
In the human male, the urethra serves as a common passage for:
A.Sperm and Bile
B.Urine and Sperms
C.Urine and Blood
D.Sperms and Digestive waste
Download the worksheet for Reproduction - Sexual Reproduction to practice offline. It includes additional chapter-level practice questions.
Sexual Reproduction in Animals
SubtopicSexual Reproduction in Animals under Reproduction for Grade 9 CBSE.
Preview questions (no answers)
- 1.
How many sperm cells are usually required to fertilize one egg?
A.Many
B.Two
C.One
D.None
- 2.
The time period from fertilization to birth is known as:
A.Metamorphosis
B.Gestation
C.Incubation
D.Puberty
- 3.
Which of these is an example of a viviparous animal?
A.Lizard
B.Elephant
C.Snake
D.Crow
- 4.
The zygote divides repeatedly to give rise to an:
A.Ova
B.Embryo
C.Adult
D.Organism
- 5.
In a particular species of animal, the male and female gametes (sperm and egg) each contain chromosomes. Based on the process of fertilization shown in the flowchart, how many chromosomes will be found in the resulting zygote?
A.B.C.D. - 6.
Which of these statements is FALSE regarding Dolly the sheep?
A.Dolly was a clone of a Finn Dorsett sheep
B.Dolly was born in 1996
C.Dolly was produced by the fusion of two sperm cells
D.Dolly lived for several years and produced her own offspring
- 7.
The process of releasing a mature egg from the ovary is called:
A.Fertilization
B.Ovulation
C.Implantation
D.Menstruation
- 8.
Which of the following correctly describes 'Ovoviviparity'?
A.Young ones are born alive and nourished via a placenta.
B.Eggs are laid outside and hatched after incubation.
C.Eggs are retained inside the mother's body until they hatch, but there is no placental connection.
D.The organism reproduces by splitting into two equal halves.
- 9.
In the development of a chick, the 'Hatching' process occurs when:
A.The mother bird breaks the shell with her beak.
B.The embryo is fully developed and breaks the shell using its egg-tooth.
C.The shell dissolves due to the heat of incubation.
D.The yolk is completely finished.
- 10.
During fertilization, why can usually only one sperm enter the egg (prevention of polyspermy)?
A.The egg releases a chemical that kills all other sperm.
B.The egg membrane undergoes a rapid depolarization and structural change (cortical reaction).
C.The other sperm cells run out of energy immediately.
D.The sperm cells compete and only the strongest one survives.
Download the worksheet for Reproduction - Sexual Reproduction in Animals to practice offline. It includes additional chapter-level practice questions.
Variations in Reproduction in Animals
SubtopicVariations in Reproduction in Animals under Reproduction for Grade 9 CBSE.
Preview questions (no answers)
- 1.
Which part of the human sperm contains the genetic material?
A.Tail
B.Middle piece
C.Head
D.Neck
- 2.
The wall of the uterus thickens to receive the:
A.Sperm
B.Egg
C.Embryo
D.Larva
- 3.
Which of these is a character of sexual reproduction?
A.Identical offspring
B.Single parent
C.Fusion of gametes
D.Fastest method
- 4.
Dolly the sheep was the first mammal to be:
A.Born in a lab
B.Cloned
C.Genetically modified
D.Vaccinated
- 5.
The diagram illustrates the specialized regions of a human sperm cell. What is the specific physiological role of the 'Middle Piece' during the process of fertilization?
A.It contains numerous mitochondria to produce energy for movement.
B.It houses the nucleus containing chromosomes for the zygote.
C.It releases digestive enzymes to penetrate the outer layer of the egg.
D.It acts as a sensory organ to navigate through the fallopian tube.
- 6.
In oviparous animals such as birds and reptiles, the embryo develops inside a protective egg outside the mother's body. Based on the structural flowchart below, which part is responsible for providing the primary source of nutrition to the growing embryo?
A.The hard outer shell that allows gas exchange
B.The air space that provides the first breath
C.The thick layer of albumin which provides water
D.The nutrient-rich yolk which sustains development
- 7.
How many parents are involved in sexual reproduction?
A.Only one
B.Typically two
C.Always three
D.None
- 8.
In 'Temperature-dependent Sex Determination' (TSD) Type I, what typically happens when eggs are incubated at high temperatures?
A.The majority of the offspring develop as females.
B.The majority of the offspring develop as males.
C.The offspring develop as sterile individuals with no gonads.
D.The sex ratio remains exactly 1:1 regardless of the temperature.
- 9.
Which of the following describes 'Theca Cells' in the ovarian follicle?
A.They produce androgens which are then converted to estrogens by granulosa cells.
B.They are the primary cells that undergo meiosis to form the secondary oocyte.
C.They form the protective 'Corona Radiata' that surrounds the egg after ovulation.
D.They secrete the fluid that fills the antrum of the Graafian follicle.
- 10.
How does the reproductive system of 'Marsupials' differ fundamentally from 'Eutherians'?
A.Marsupials have a very short gestation period and complete development in an external pouch.
B.Marsupials reproduce via external fertilization while Eutherians use internal.
C.Marsupials lack ovaries and produce eggs in a specialized segment of the liver.
D.Marsupials are the only animals that exhibit true 'Hablodiploidy'.
Download the worksheet for Reproduction - Variations in Reproduction in Animals to practice offline. It includes additional chapter-level practice questions.
Reproduction in Human Beings
SubtopicReproduction in Human Beings under Reproduction for Grade 9 CBSE.
Preview questions (no answers)
- 1.
A fertilized egg is also known as a:
A.Zygote
B.Embryo
C.Fetus
D.Pollen
- 2.
The and chromosomes are known as:
A.Autosomes
B.Sex chromosomes
C.Ribosomes
D.Lysosomes
- 3.
Which of the following is responsible for the transfer of characters from parents to offspring?
A.Genes
B.Plasma
C.Cytoplasm
D.Cell membrane
- 4.
Acne and pimples are common during puberty due to increased activity of:
A.Sweat and oil glands
B.Adrenal glands
C.Thyroid glands
D.Salivary glands
- 5.
The following diagram represents a simplified pathway in the male reproductive system. If a surgical procedure physically blocks the transport through 'Duct D', what will be the most likely outcome?
A.The testes will immediately stop the production of testosterone.
B.The passage of urine from the bladder will be completely obstructed.
C.Sperms will be produced but will not be present in the ejaculated fluid.
D.The production of sperm cells in the testes will cease entirely.
- 6.
The placenta is a specialized disc-like tissue that facilitates the exchange of substances between the mother and the developing embryo. Based on the direction of transport shown in the diagram, which of the following substances are represented by the arrow moving from the embryo to the mother's blood?
A.Oxygen and Glucose
B.Carbon dioxide and Urea
C.Vitamins and Minerals
D.Proteins and Antibodies
- 7.
In which part of the female reproductive system is the Copper-T placed?
A.Fallopian tube
B.Ovary
C.Uterus
D.Cervix
- 8.
In human beings, sexual reproduction involves the fusion of gametes. If gametes were produced by mitosis instead of meiosis, what would happen to the chromosome number in each subsequent generation?
A.It would remain constant at 46.
B.It would be reduced to half (23).
C.It would double in every generation.
D.It would fluctuate randomly.
- 9.
The fusion of a sperm with an egg results in the formation of a single cell called a:
A.Embryo
B.Zygote
C.Fetus
D.Ovum
- 10.
Which part of the sperm contains the genetic material?
A.Tail
B.Middle piece
C.Head
D.Acrosome
Download the worksheet for Reproduction - Reproduction in Human Beings to practice offline. It includes additional chapter-level practice questions.