Topic-wise MCQs – Reproduction in Animals
1. Basic Concepts and Modes of ReproductionFundamentals
Questions on definition of reproduction, its importance and basic modes in animals.
Reproduction in animals mainly helps in:
Correct Answer: (b)
Explanation: The main purpose of reproduction is to produce new individuals of the same kind so that the species does not disappear from the Earth. Other processes like digestion and energy production are covered by nutrition and respiration, not reproduction.
Which of the following is the correct definition of reproduction?
Correct Answer: (c)
Explanation: Reproduction is defined as the biological process in which living organisms give rise to new individuals similar to themselves, ensuring continuation of the species.
Why is reproduction not considered essential for the survival of an individual organism?
Correct Answer: (b)
Explanation: An individual can survive if its basic life processes like nutrition and respiration work properly, even if it does not reproduce. But without reproduction, the species cannot continue for long.
Which of the following is not a mode of reproduction in animals?
Correct Answer: (d)
Explanation: Sexual and asexual reproduction (including binary fission) are reproductive methods. Photosynthesis is a mode of nutrition in plants, not a mode of reproduction.
In sexual reproduction in animals, which of the following is always true?
Correct Answer: (b)
Explanation: Sexual reproduction requires two parents – one male and one female. They produce gametes which fuse to form a zygote. Asexual reproduction involves only one parent.
Asexual reproduction in animals is usually seen in:
Correct Answer: (b)
Explanation: Simple organisms such as Amoeba, Hydra and yeast reproduce by methods like binary fission and budding, which are forms of asexual reproduction. Higher animals generally reproduce sexually.
Which of the following pairs is correctly matched?
Correct Answer: (d)
Explanation: Reproduction is responsible for the formation of new individuals. Fusion of gametes is a part of reproduction, not nutrition; excretion and respiration are different life processes.
Offspring produced by asexual reproduction are called “clones” because:
Correct Answer: (c)
Explanation: In asexual reproduction, only one parent is involved and there is no mixing of genetic material. So the offspring have the same genetic makeup as the parent and are called clones.
2. Human Male Reproductive SystemStructures & Functions
Questions based on parts and functions of the male reproductive system and sperm structure.
Which of the following organs produce sperms in humans?
Correct Answer: (c)
Explanation: The testes are the primary male reproductive organs. They produce male gametes called sperms and also secrete male hormones.
Testes are located in a pouch of skin outside the abdominal cavity. This pouch is called:
Correct Answer: (b)
Explanation: The testes lie in a sac-like structure called the scrotum. This keeps them slightly cooler than body temperature, which is important for proper sperm formation.
The tube that carries sperms from testes to the urethra is known as:
Correct Answer: (c)
Explanation: The sperm duct, also called vas deferens, transports sperms from testes to the urethra, where they can be released out of the body.
Which of the following correctly describes a sperm?
Correct Answer: (b)
Explanation: A sperm is a tiny, motile cell with a head, middle piece and a long tail. The tail helps it swim towards the ovum for fertilisation.
The head of the sperm mainly contains:
Correct Answer: (c)
Explanation: The head of the sperm has a nucleus that carries the father’s hereditary information. This genetic material combines with that of the ovum during fertilisation.
Why is the tail of the sperm important?
Correct Answer: (b)
Explanation: The long tail of a sperm moves like a whip and enables it to swim through the female reproductive tract to reach the ovum for fertilisation.
3. Human Female Reproductive SystemStructures & Functions
Questions on ovaries, oviducts, uterus, vagina and functions of ovum.
Which organ produces ova (eggs) in human females?
Correct Answer: (c)
Explanation: The ovaries are the primary female reproductive organs. They produce female gametes called ova and also secrete female hormones.
The oviduct in the female reproductive system is also known as:
Correct Answer: (b)
Explanation: The oviduct is commonly called the fallopian tube. It carries the ovum from the ovary to the uterus and is usually the site of fertilisation.
Which part of the female reproductive system provides a place for development of the embryo?
Correct Answer: (b)
Explanation: The uterus is a pear-shaped, muscular organ where the embryo gets attached to the soft lining and develops into a baby. It provides protection and nourishment.
The passage through which the baby is born and which also receives sperms is:
Correct Answer: (c)
Explanation: The vagina is a muscular tube that receives sperms during mating and acts as the birth canal during the birth of the baby.
In humans, how often is usually one mature ovum released from an ovary?
Correct Answer: (b)
Explanation: In a healthy human female, usually one ovum is released approximately once in 28 days in a process called ovulation.
Which of the following correctly compares sperm and ovum in humans?
Correct Answer: (b)
Explanation: In humans, the sperm is tiny and moves with the help of a tail, while the ovum is comparatively large, round and non-motile.
The main function of the ovum is to:
Correct Answer: (b)
Explanation: The ovum not only carries half of the genetic information from the mother but also contains cytoplasm and stored nutrients that support the initial development of the zygote.
4. Fertilisation and Zygote FormationCore Concepts
Questions on gametes, fertilisation, internal vs external fertilisation and zygote.
Fusion of the nucleus of sperm with the nucleus of ovum is called:
Correct Answer: (b)
Explanation: Fertilisation is the process of fusion of male and female gametes, resulting in the formation of a zygote.
The cell formed immediately after fertilisation is known as:
Correct Answer: (c)
Explanation: The zygote is the first cell of a new individual, formed when the sperm and ovum nuclei unite.
In humans, fertilisation usually occurs in the:
Correct Answer: (b)
Explanation: In humans, the sperm meets the ovum and fertilisation usually takes place in the oviduct, not in the uterus or ovary.
Fertilisation that takes place inside the body of the female is called:
Correct Answer: (b)
Explanation: In internal fertilisation, gametes fuse inside the female’s body, as occurs in humans, cows, dogs and many other animals.
Frogs show which type of fertilisation?
Correct Answer: (c)
Explanation: In frogs, eggs and sperms are released in water and meet outside the body, so they show external fertilisation.
Why do animals with external fertilisation generally release a large number of eggs?
Correct Answer: (b)
Explanation: In external fertilisation, many eggs are eaten by predators or washed away, so producing more eggs increases the chance that some will be fertilised and survive.
Which statement about zygote is correct?
Correct Answer: (c)
Explanation: The zygote is the first cell formed after fertilisation and has combined genetic material from both parents. It later divides to form the embryo.
Which sequence shows the correct order of events?
Correct Answer: (c)
Explanation: The correct developmental order is: zygote (single cell) → divides to form embryo → grows and develops body parts to become foetus.
5. Embryo, Foetus, Placenta and BirthDevelopment
Questions based on development inside uterus, placenta and birth.
The stage of development when the zygote divides into many cells is called:
Correct Answer: (b)
Explanation: After repeated cell divisions, the zygote changes into a multicellular ball of cells called the embryo.
When the body parts of the developing baby become distinctly visible, it is called:
Correct Answer: (c)
Explanation: When structures like hands, legs, head and eyes are clearly seen, the developing baby is termed a foetus.
The special tissue connection between mother and foetus is called:
Correct Answer: (b)
Explanation: The placenta is a tissue that connects the foetus to the mother’s uterus and allows exchange of oxygen, nutrients and waste products between their blood.
How does the developing foetus receive nourishment from the mother?
Correct Answer: (c)
Explanation: The foetus is attached to the placenta by the umbilical cord. Nutrients and oxygen from the mother’s blood pass through the placenta to the foetus.
Which statement about the uterus is correct?
Correct Answer: (c)
Explanation: The uterus provides the space, protection and blood supply needed for the embryo and foetus to grow until birth.
Birth of a baby is the result of:
Correct Answer: (c)
Explanation: At the time of birth, strong muscular contractions of the uterus push the fully developed baby out through the cervix and vagina.
6. Oviparous and Viviparous AnimalsClassification
Questions on animals that lay eggs and animals that give birth to young ones.
Animals that lay eggs are called:
Correct Answer: (b)
Explanation: Oviparous animals, such as frog and hen, lay eggs from which young ones hatch.
Animals that give birth to young ones are called:
Correct Answer: (b)
Explanation: Viviparous animals, like humans, cows and dogs, give birth to fully formed young ones instead of laying eggs outside the body.
Which of the following is an example of an oviparous animal?
Correct Answer: (c)
Explanation: Hen lays eggs, so it is oviparous. Humans, cows and dogs are viviparous animals.
Which of the following is not correctly matched?
Correct Answer: (d)
Explanation: Cat gives birth to young ones, so it is viviparous, not oviparous. Other options are correctly matched.
Viviparous animals usually produce fewer young ones because:
Correct Answer: (c)
Explanation: In viviparous animals, the embryo develops inside the mother’s body and young ones usually receive parental care, so fewer offspring are enough to continue the species.
7. Metamorphosis in FrogLife Cycle
Questions based on life cycle, tadpole and adult frog adaptations.
The larval stage of a frog is called:
Correct Answer: (c)
Explanation: A tadpole is the larval stage of a frog that lives in water and looks very different from the adult frog.
Which of the following is the correct sequence in the life cycle of a frog?
Correct Answer: (c)
Explanation: In frogs, eggs laid in water hatch into tadpoles, which later undergo metamorphosis to become adult frogs.
Metamorphosis in frog refers to:
Correct Answer: (c)
Explanation: Metamorphosis is a sudden and major change in body form. In frogs, the fish-like tadpole changes into an adult frog with legs and lungs.
How does a tadpole breathe?
Correct Answer: (c)
Explanation: The tadpole lives in water and breathes by using gills, similar to fish. Adult frogs mainly use lungs and moist skin for breathing.
Why is an adult frog called an amphibian?
Correct Answer: (c)
Explanation: Adult frogs can live on land as well as in water, so they are called amphibians. Their lungs and moist skin help them breathe in both habitats.
8. Asexual Reproduction – Amoeba, Hydra and YeastAsexual Mode
Questions on binary fission, budding and features of asexual reproduction.
Amoeba reproduces asexually by:
Correct Answer: (c)
Explanation: Amoeba reproduces by binary fission, in which its nucleus divides into two and then the cytoplasm splits, forming two daughter Amoebae.
Hydra reproduces asexually by:
Correct Answer: (b)
Explanation: Hydra reproduces by budding. A small outgrowth (bud) appears on the parent body, grows and eventually detaches as a new Hydra.
Which of the following reproduces by budding and is used in baking?
Correct Answer: (c)
Explanation: Yeast is a unicellular fungus used in baking and brewing. It reproduces asexually by forming buds on the parent cell.
Which of the following statements about asexual reproduction is correct?
Correct Answer: (c)
Explanation: In asexual reproduction, only one parent is involved; there is no gamete fusion, so the offspring are genetically identical to the parent.
Which of the following pairs is correctly matched with its method of reproduction?
Correct Answer: (c)
Explanation: Yeast reproduces by budding. Amoeba reproduces by binary fission, Hydra by budding, and frog by sexual reproduction with external fertilisation.