Kerala SSLC · Biology · Class 10

Reproduction: Important Questions with Answers

These are 10 important multiple-choice questions from the Kerala SSLC Biology chapter “Reproduction” (Kerala SCERT syllabus). Each one shows the correct answer and a short explanation of why it is right. Try answering before you read the answer. ExamSummary has 10 practice questions on this chapter in total.

  1. Q1.After fertilization in a flowering plant, which part of the flower develops into the fruit?

    • A)The stamen
    • B)The ovary
    • C)The petal
    • D)The sepal

    Answer: B) The ovary

    Following fertilization, the ovary matures and enlarges to form the fruit, while the ovules inside develop into seeds. The other parts like petals and sepals usually wither away.

  2. Q2.In the human female reproductive system, where does the fertilization of the egg typically take place?

    • A)The uterus
    • B)The ovary
    • C)The oviduct
    • D)The cervix

    Answer: C) The oviduct

    Fertilization occurs when the sperm meets the egg in the oviduct (fallopian tube). Afterward, the zygote travels to the uterus for implantation.

  3. Q3.Which of the following describes the primary mechanism of barrier contraceptive methods like condoms?

    • A)They prevent ovulation by altering hormones.
    • B)They destroy sperm chemically within the vagina.
    • C)They physically block sperm from entering the uterus.
    • D)They remove the ovaries surgically.

    Answer: C) They physically block sperm from entering the uterus.

    Barrier methods work by creating a physical obstacle that prevents sperm from reaching the egg or entering the uterus. This avoids hormonal changes or surgical intervention.

  4. Q4.Why is sexual reproduction considered advantageous compared to asexual reproduction in changing environments?

    • A)It requires less energy to produce offspring.
    • B)It produces offspring that are genetically identical to the parent.
    • C)It introduces genetic variation among the offspring.
    • D)It allows organisms to reproduce without a mate.

    Answer: C) It introduces genetic variation among the offspring.

    Sexual reproduction involves the combination of genetic material from two parents, leading to variation. This variation helps populations adapt better to environmental changes and diseases.

  5. Q5.Bryophyllum is a plant known for its ability to propagate vegetatively. From which part does new growth originate in this species?

    • A)Roots
    • B)Stems
    • C)Leaves
    • D)Flowers

    Answer: C) Leaves

    Bryophyllum reproduces vegetatively through buds that develop along the margins of its leaves. When these leaf buds fall onto moist soil, they grow into new plants.

  6. Q6.What is the main function of the placenta during human pregnancy?

    • A)To produce eggs for fertilization.
    • B)To connect the mother and fetus for nutrient and waste exchange.
    • C)To protect the fetus from all external sounds.
    • D)To determine the gender of the baby.

    Answer: B) To connect the mother and fetus for nutrient and waste exchange.

    The placenta acts as a bridge between the mother and the developing fetus, facilitating the transfer of nutrients and oxygen while removing waste products. It also secretes hormones necessary for maintaining pregnancy.

  7. Q7.Menstruation occurs in the female reproductive cycle when which of the following conditions is met?

    • A)Fertilization has successfully occurred.
    • B)The uterine lining breaks down due to lack of fertilization.
    • C)The ovaries stop releasing eggs permanently.
    • D)Sperm cells enter the uterus in large numbers.

    Answer: B) The uterine lining breaks down due to lack of fertilization.

    If an egg is not fertilized, the thickened lining of the uterus is shed along with blood and tissue. This periodic discharge is known as menstruation.

  8. Q8.What is the term for the single diploid cell formed immediately after the fusion of a sperm and an egg?

    • A)Embryo
    • B)Zygote
    • C)Gamete
    • D)Fetus

    Answer: B) Zygote

    The fusion of haploid gametes results in a diploid zygote, which contains the complete set of chromosomes. The zygote then undergoes division to form an embryo.

  9. Q9.In Amoeba, reproduction occurs through binary fission. What is the direct result of this process?

    • A)Four genetically different daughter cells.
    • B)Two genetically identical daughter cells.
    • C)One larger parent cell and one smaller bud.
    • D)Spores released into the environment.

    Answer: B) Two genetically identical daughter cells.

    Binary fission involves the nucleus dividing first, followed by the cytoplasm, resulting in two equal-sized, genetically identical daughter cells. This is a form of asexual reproduction.

  10. Q10.Why are the testes located in the scrotum outside the abdominal cavity in human males?

    • A)To allow easier access for medical examination.
    • B)To maintain a lower temperature required for sperm production.
    • C)To prevent the sperm from mixing with urine.
    • D)To increase the size of the reproductive organs.

    Answer: B) To maintain a lower temperature required for sperm production.

    Spermatogenesis requires a temperature slightly lower than the normal body temperature. The scrotum provides this cooler environment necessary for viable sperm production.

All Kerala SSLC Biology chapters →