Practice: Reproduction, Growth & Adolescence
Knowledge Check
Modes of Reproduction – Sexual, Asexual and Vegetative
Q1: Which of the following is an essential feature of asexual reproduction?
A) Involves two parents and gamete fusion
B) Involves only one parent and no gamete fusion
C) Always requires pollination
D) Produces a large number of variations in offspring
Q2: Binary fission is a type of asexual reproduction seen in:
A) Hydra
B) Yeast
C) Amoeba
D) Bryophyllum
Q3: Vegetative propagation is best defined as:
A) Reproduction using only seeds
B) Asexual reproduction using roots, stems or leaves
C) Sexual reproduction in flowers
D) Reproduction using spores formed in sporangia
Q4: Potato and ginger mainly reproduce in agriculture by:
A) Seeds only
B) Stem tubers and rhizomes respectively
C) Leaf buds
D) Root cuttings only
Q5: Which advantage of vegetative propagation is most useful for farmers and gardeners?
A) Produces highly varied offspring
B) Produces offspring slowly
C) Produces genetically similar plants with desired characters
D) Requires very complex care and equipment always
Q6: Sexual reproduction is considered better for long-term survival of a species because:
A) It always produces more offspring than asexual reproduction
B) It produces identical copies of parents
C) It produces variations in offspring
D) It does not involve gametes at all
Q7: Which of the following is correctly matched with its type of reproduction?
A) Hydra – fragmentation
B) Yeast – budding
C) Spirogyra – budding
D) Bryophyllum – spore formation only
Q8: Which statement about vegetative propagation is incorrect?
A) It can be used to raise a large number of plants quickly
B) Plants raised will be true to type (similar to parent)
C) It always needs seed formation
D) It is useful for plants that do not produce viable seeds
Q9: Asexual reproduction is more common in which type of organisms?
A) Large mammals
B) Unicellular organisms and simple multicellular forms
C) Birds and reptiles only
D) All flowering plants only
Q10: Which one of the following is a vegetative propagation method used widely in mango orchards?
A) Spore formation
B) Grafting
C) Binary fission
D) Budding in yeast
Sexual Reproduction in Plants and Seed Dispersal
Q11: The male reproductive part of a flower is called:
A) Pistil
B) Stamen
C) Sepal
D) Petal
Q12: Transfer of pollen grains from anther to stigma is called:
A) Fertilisation
B) Germination
C) Pollination
D) Dispersal
Q13: Cross-pollination occurs when pollen is transferred:
A) From anther to stigma of the same flower
B) From anther to stigma of another flower on same plant
C) Between flowers of different plants of the same species
D) Between flowers of entirely different species always
Q14: In insect-pollinated flowers, which feature is most important?
A) Very small petals and no nectar
B) Brightly coloured petals and nectar
C) Only feathery stigma
D) Very dry flowers without any scent or colour
Q15: Fertilisation in flowering plants occurs when:
A) Pollen falls on stigma
B) Pollen tube releases male gamete into ovule
C) Ovule falls from flower
D) Petals fall off after pollination only
Q16: After fertilisation, the ovary of a flower develops into:
A) Seed
B) Fruit
C) Root
D) Leaf-like structure only
Q17: Seed dispersal is important because it:
A) Causes overcrowding of plants at one place
B) Helps plants colonise new areas and reduce competition
C) Always reduces chances of plant survival
D) Stops seed germination completely
Q18: Fruits like cotton and madar (Calotropis) are mainly dispersed by:
A) Water
B) Explosion
C) Wind
D) Animals only by eating pulp
Q19: Coconut is a fruit adapted mainly for dispersal by:
A) Wind
B) Water
C) Animals
D) Explosion of pod only on land
Q20: Hooked fruits of Xanthium and Urena are dispersed by:
A) Wind
B) Water
C) Animals by attachment to fur or clothing
D) Self-explosion due to dryness only
Sexual and Asexual Reproduction in Animals, Metamorphosis
Q21: Which statement is true for sexual reproduction in animals?
A) Only one parent is involved
B) Two gametes fuse to form a zygote
C) Offspring are genetically identical to parent
D) It occurs only in unicellular animals
Q22: Hydra reproduces asexually by:
A) Binary fission
B) Spore formation
C) Budding
D) Fragmentation into many pieces
Q23: In frogs, fertilisation is:
A) Internal and takes place in uterus
B) Internal and takes place in oviduct
C) External and takes place in water
D) Asexual and takes place by budding
Q24: In which group of animals are male and female sex organs present in the same individual (hermaphrodite)?
A) Human beings
B) Earthworms
C) Frogs
D) Fishes such as rohu
Q25: Which sequence correctly represents metamorphosis in a frog?
A) Egg → adult frog → tadpole
B) Egg → tadpole → adult frog
C) Adult frog → egg → tadpole
D) Tadpole → egg → adult frog
Q26: Which is the correct order of stages in the life cycle of a butterfly?
A) Egg → larva → pupa → adult
B) Egg → pupa → larva → adult
C) Adult → egg → larva only
D) Larva → adult → egg only
Q27: Metamorphosis in animals mainly involves:
A) Only increase in body size without any change in form
B) Sudden change in body form and habit during development
C) Change only in colour of the body
D) No change at all from young to adult stage
Q28: Which of the following is not an example of asexual reproduction in animals?
A) Budding in Hydra
B) Binary fission in Amoeba
C) Regeneration in starfish
D) Internal fertilisation in cow
Q29: Which pair is correctly matched?
A) Frog – internal fertilisation
B) Human – external fertilisation
C) Fish (rohu) – external fertilisation
D) Hydra – sexual budding only
Q30: A severe loss of larval habitat (ponds for tadpoles) is likely to affect which stage of frog life cycle most?
A) Egg formation in adult frog
B) Tadpole development
C) Adult frog breathing
D) Only food of adult frog on land
Reproduction in Human (Placental Mammal) and Cloning
Q31: In humans, fertilisation normally takes place in the:
A) Ovary
B) Oviduct (fallopian tube)
C) Uterus
D) Vagina
Q32: The structure that connects developing human foetus with the mother’s body is:
A) Liver
B) Placenta
C) Kidney
D) Pancreas
Q33: Which statement about placenta is correct at school level?
A) Foetal and maternal blood directly mix in placenta
B) Placenta allows exchange of materials without mixing blood
C) Placenta is only for mechanical protection
D) Placenta stores all waste products till birth only
Q34: Which pair of hormones is mainly produced by human ovaries?
A) Insulin and glucagon
B) Adrenaline and thyroxine
C) Estrogen and progesterone
D) Testosterone and growth hormone
Q35: Cloning at school level is best described as:
A) Crossing two varieties to get hybrids
B) Producing genetically identical copies of an organism
C) Producing offspring with maximum variation
D) Natural pollination of flowers only by insects
Q36: The first mammal cloned from an adult body cell was:
A) Molly the cow
B) Dolly the sheep
C) Tomy the goat
D) Kitty the cat
Q37: Which statement about cloning is correct at school level?
A) Cloning always creates highly variable offspring
B) Cloning is same as normal sexual reproduction
C) Cloning produces offspring with same genetic material as donor
D) Cloning never raises any ethical questions in society
Q38: Identical twins in humans are a natural example of:
A) Sexual reproduction with two zygotes
B) Natural cloning from the same zygote
C) Asexual budding
D) External fertilisation in uterus only
A) Sexual reproduction with two zygotes
B) Natural cloning from the same zygote
C) Asexual budding
D) External fertilisation in uterus only
Q39: In human females, the site of implantation of the fertilised egg is:
A) Ovary
B) Oviduct
C) Uterus
D) Cervix only near vagina
Q40: A basic advantage of internal fertilisation in mammals is that:
A) Large number of eggs can be fertilised outside
B) Developing embryo gets protection inside the body
C) No care is needed for young ones
D) Development never depends on placenta at all
Reproductive Health, Birth Control Methods and Social Issues
Q41: Reproductive health mainly means:
A) Only absence of disease in reproductive organs
B) Physical, mental and social well-being related to reproduction
C) Ability to have maximum number of children
D) Knowledge only about structure of organs from textbooks
Q42: Which of the following is a spacing method of family planning?
A) Vasectomy
B) Tubectomy
C) Use of condoms
D) Removal of uterus
Q43: Which of the following is a permanent method of birth control in males?
A) Condom
B) Intra-uterine device
C) Vasectomy
D) Monthly tablets taken by female only
Q44: One important advantage of small and well-planned family is:
A) Less attention to each child
B) Better health and education facilities for children
C) Always increase in economic burden
D) No need to think about health of mother at all
Q45: Child marriage is harmful mainly because:
A) It always increases height of children
B) It affects health, education and overall development
C) It makes all families rich quickly
D) It has no relation with reproductive health at all
Q46: What is the main role of awareness programmes about reproductive health in schools?
A) To create fear among students
B) To give correct scientific information and remove myths
C) To encourage risky behaviour
D) To stop students from asking questions forever
Q47: Which of the following supports reproductive health in adolescents?
A) Balanced diet and physical exercise
B) Use of tobacco and alcohol
C) Isolation from parents and teachers
D) Ignoring basic hygiene practices
Q48: Which one is a correct school-level statement about birth control methods?
A) They are chosen only by doctors without consulting couples
B) They help protect health of mother and child by spacing births
C) They are meant to harm reproductive organs
D) They are used only after children become adults
Q49: Which of the following is a social responsibility related to reproductive health?
A) Supporting child marriage
B) Respecting laws that protect children and women
C) Spreading myths about puberty and menstruation
D) Encouraging discrimination between boys and girls
Q50: Which of these practices directly supports dignity and safety of adolescents?
A) Bullying about body changes
B) Sharing sensitive pictures without consent
C) Respecting privacy and personal boundaries
D) Ignoring school rules on safety and behaviour
Adolescence and Puberty – Changes, Hormones, Reproductive Phase
Q51: Adolescence is the period between:
A) Infancy and childhood
B) Childhood and adulthood
C) Adulthood and old age
D) Birth and first year only
Q52: The stage when sex organs mature and the body becomes capable of reproduction is called:
A) Menopause
B) Puberty
C) Cloning
D) Fertilisation stage only in uterus
Q53: During puberty, the main sex hormone produced in boys is:
A) Estrogen
B) Progesterone
C) Insulin
D) Testosterone
Q54: Which of the following is a secondary sexual character in girls?
A) Production of ova in ovaries
B) Development of mammary glands
C) Formation of placenta
D) Presence of kidneys in body
Q55: Which of the following changes occurs in both boys and girls during adolescence?
A) Broadening of shoulders only
B) Development of beard
C) Rapid increase in height
D) Development of uterus only in body
Q56: Menstruation in girls is a sign that:
A) Puberty has started and reproductive system is maturing
B) Growth of bones has stopped
C) Body temperature has permanently changed
D) Heart and lungs have stopped functioning properly
Q57: Which habit is not recommended for adolescents?
A) Getting enough sleep
B) Eating a balanced diet
C) Regular physical exercise
D) Using addictive substances like tobacco and alcohol
Q58: Which of the following helps adolescents handle emotional changes in a healthy way?
A) Keeping all worries secret
B) Discussing doubts with trusted adults and teachers
C) Believing any information from unknown online sources
D) Comparing themselves negatively with others all the time
Q59: The reproductive phase in females generally continues from:
A) Birth to 10 years
B) Around menarche to around menopause
C) 2 years to 8 years
D) 60 years to 80 years only
Q60: Why is personal hygiene specially important during adolescence?
A) Because it stops all growth
B) Because sweat and oil secretion increase and may cause infections if ignored
C) Because it completely changes genetic material
D) Because it stops all emotional changes permanently