Chapter Exam

Chapter 7: How do Organisms Reproduce? — Online MCQ Test

Q: In Amoeba, reproduction usually takes place by which method?

Answer: A. Binary fission — Amoeba is a unicellular organism that divides into two daughter cells by binary fission.

Q: The transfer of pollen grains from the anther to the stigma is called:

Answer: B. Pollination — Pollination is the process in which pollen grains are transferred from the anther to the stigma of a flower.

Q: Which part of the flower produces pollen grains?

Answer: C. Anther — The anther is a part of the stamen and produces pollen grains containing male gametes.

Q: The fusion of male and female gametes is known as:

Answer: B. Fertilisation — Fertilisation is the fusion of the male gamete with the female gamete to form a zygote.

Q: A gardener wants to grow a plant that has the same desirable traits as the parent plant. Which method is most suitable?

Answer: B. Vegetative propagation by cuttings — Vegetative propagation produces plants genetically similar to the parent, helping maintain desirable traits.

Q: A student observes that a single-celled organism first divides its nucleus many times and then divides its cytoplasm to form many daughter cells at once. Which process is most likely occurring?

Answer: B. Multiple fission — In multiple fission, the nucleus divides repeatedly and many daughter cells are produced simultaneously, as seen in Plasmodium.

Q: In a flowering plant, pollen grains reach the stigma successfully, but the pollen tube fails to grow. Which process will be directly prevented?

Answer: B. Movement of male gamete to the ovule — The pollen tube carries male gametes from the stigma through the style to the ovule; without it, fertilisation cannot occur.

SCIENCE · CLASS 10th · Karnataka State Board

Practice Chapter 7: How do Organisms Reproduce? with a free chapter-wise online MCQ test for Karnataka State Board CLASS 10th SCIENCE. This chapter covers: Asexual reproduction Sexual reproduction Binary fission Budding Vegetative propagation Pollination Fertilisation Embryo Puberty Reproductive health. AI-generated questions from basic to board-exam level, with instant results and explanations.

Questions

20m

Time Limit

Attempts Left

10 random questions from this chapter (mixed difficulty)
Questions you've seen before won't repeat until the pool resets
You have 20 minutes — exam auto-submits when time is up
Maximum 3 attempts per chapter
Results and explanations shown immediately after submission

New here? Register free — includes 3 free chapter exams.

Chapter 7: How do Organisms Reproduce? — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 10th SCIENCE — Chapter 7: How do Organisms Reproduce?, with answers and explanations. These are sample questions; the exam has its own separate question set.

In Amoeba, reproduction usually takes place by which method?

A. Binary fission ✓
B. Budding
C. Fragmentation
D. Spore formation

Answer: A. Binary fission
Amoeba is a unicellular organism that divides into two daughter cells by binary fission.

The transfer of pollen grains from the anther to the stigma is called:

A. Fertilisation
B. Pollination ✓
C. Germination
D. Implantation

Answer: B. Pollination
Pollination is the process in which pollen grains are transferred from the anther to the stigma of a flower.

Which part of the flower produces pollen grains?

A. Stigma
B. Style
C. Anther ✓
D. Ovary

Answer: C. Anther
The anther is a part of the stamen and produces pollen grains containing male gametes.

The fusion of male and female gametes is known as:

A. Pollination
B. Fertilisation ✓
C. Menstruation
D. Regeneration

Answer: B. Fertilisation
Fertilisation is the fusion of the male gamete with the female gamete to form a zygote.

A gardener wants to grow a plant that has the same desirable traits as the parent plant. Which method is most suitable?

A. Growing from seeds after cross-pollination
B. Vegetative propagation by cuttings ✓
C. Allowing random pollination
D. Using only fertilised ovules

Answer: B. Vegetative propagation by cuttings
Vegetative propagation produces plants genetically similar to the parent, helping maintain desirable traits.

Which statement correctly compares asexual and sexual reproduction?

A. Asexual reproduction always involves two parents, while sexual reproduction involves one parent.
B. Asexual reproduction produces more variation than sexual reproduction.
C. Sexual reproduction involves fusion of gametes, while asexual reproduction does not. ✓
D. Sexual reproduction occurs only in unicellular organisms.

Answer: C. Sexual reproduction involves fusion of gametes, while asexual reproduction does not.
Sexual reproduction involves the fusion of male and female gametes, whereas asexual reproduction does not involve gamete fusion.

A student observes that a single-celled organism first divides its nucleus many times and then divides its cytoplasm to form many daughter cells at once. Which process is most likely occurring?

A. Binary fission
B. Multiple fission ✓
C. Budding
D. Regeneration

Answer: B. Multiple fission
In multiple fission, the nucleus divides repeatedly and many daughter cells are produced simultaneously, as seen in Plasmodium.

Which sequence correctly represents events after pollination in a flowering plant?

A. Pollen tube formation → fertilisation → zygote formation → seed formation ✓
B. Fertilisation → pollination → pollen tube formation → seed formation
C. Seed formation → pollination → fertilisation → zygote formation
D. Zygote formation → pollination → pollen tube formation → fertilisation

Answer: A. Pollen tube formation → fertilisation → zygote formation → seed formation
After pollination, a pollen tube grows through the style, male gametes reach the ovule, fertilisation occurs, and the ovule develops into a seed.

A plant produced by vegetative propagation and a plant produced by sexual reproduction are compared. Which statement is most accurate?

A. Vegetatively propagated plants are usually genetically similar to the parent, while sexually produced plants may show more variation. ✓
B. Vegetatively propagated plants always have more variation than sexually produced plants.
C. Sexually produced plants never contain DNA from parents.
D. Both methods always produce genetically identical offspring.

Answer: A. Vegetatively propagated plants are usually genetically similar to the parent, while sexually produced plants may show more variation.
Vegetative propagation is asexual and generally produces clones, while sexual reproduction creates variation through fusion of gametes.

In a flowering plant, pollen grains reach the stigma successfully, but the pollen tube fails to grow. Which process will be directly prevented?

A. Transfer of pollen to stigma
B. Movement of male gamete to the ovule ✓
C. Formation of petals
D. Development of anther

Answer: B. Movement of male gamete to the ovule
The pollen tube carries male gametes from the stigma through the style to the ovule; without it, fertilisation cannot occur.

← Previous Chapter

Chapter 6: Control and Coordination

Next Chapter →

Chapter 8: Heredity and Evolution