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30
Questions
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Marking
Q1. 1. A cutting from a rose plant grows into a new plant, whereas a cut-off leaf does not (unlike Bryophyllum). This is because the cutting (stem) contains:
Apical buds
Spores
Gametes
Seeds
Q2. 2. What is the key difference between fragmentation (like in Spirogyra) and regeneration (like in Planaria)?
Fragmentation is sexual; Regeneration is asexual.
Fragmentation is a normal mode of reproduction; Regeneration is primarily a survival mechanism that can lead to reproduction.
Fragmentation occurs in animals; Regeneration occurs in plants.
Fragmentation requires spores; Regeneration requires buds.
Q3. 3. (HOTS) DNA copying is an essential part of reproduction. What is the primary significance of minor inaccuracies (variations) during this copying process?
They always lead to the death of the cell.
They are the basis for the evolution of a species.
They only occur in asexual reproduction.
They stop the organism from reproducing.
Q4. 4. Which of the following correctly traces the path of pollen after pollination?
Stigma -> Style -> Ovary -> Ovule
Anther -> Stigma -> Ovary -> Style
Stigma -> Ovule -> Style -> Ovary
Ovule -> Ovary -> Stigma -> Style
Q5. 5. In the human male, why are the testes located outside the abdominal cavity in the scrotum?
To protect them from physical injury.
Sperm formation requires a temperature lower than the normal body temperature.
To store the testosterone hormone.
Sperm formation requires a temperature higher than the normal body temperature.
Q6. 6. (HOTS) A plant produced by vegetative propagation (e.g., a cutting) is genetically:
Different from the parent plant, showing variation.
Identical to the parent plant.
A hybrid of two different plants.
Weaker than the parent plant.
Q7. 7. What is the function of the fluid secreted by the seminal vesicles and the prostate gland in the human male reproductive system?
It kills the sperm to control population.
It provides nutrition to the sperm and makes their transport easier.
It triggers the production of ova in the female.
It blocks the path of urine during ejaculation.
Q8. 8. The plumule and radicle are parts of the:
Embryo (within the seed)
Flower (stamen)
Pollen grain
Ovary
Q9. 9. Which of the following STDs are both caused by bacteria?
HIV and Warts
Syphilis and Gonorrhoea
HIV and Syphilis
Warts and Gonorrhoea
Q10. 10. Which event marks the beginning of the thickening of the uterine wall (endometrium) during the menstrual cycle?
Menstruation (bleeding)
Fertilization of the egg
Ovulation (release of the egg)
Implantation of the embryo
Q11. 11. A Spirogyra filament breaks into three pieces. Each piece grows into a new, complete filament. This is an example of:
Budding
Fragmentation
Regeneration
Spore formation
Q12. 12. In a flower, which parts are directly involved in the process of sexual reproduction?
Sepals and Petals
Petals and Stamens
Stamens and Pistil (Carpel)
Sepals and Pistil
Q13. 13. The ability of a cell to divide and differentiate into a whole organism (as seen in Planaria) is called:
Totipotency
Pollination
Fertilization
Menstruation
Q14. 14. A Copper-T (IUCD) is a contraceptive device. How does it primarily work?
It stops the ovaries from releasing eggs (prevents ovulation).
It acts as a physical barrier, stopping sperm entry.
It prevents the im plantation of the fertilized egg in the uterus.
It destroys the sperm as soon as they enter.
Q15. 15. In Amoeba and Leishmania, the parent cell divides to form two daughter cells. The key difference is that Amoeba divides in any plane, while Leishmania divides:
In multiple planes (multiple fission).
Longitudinally (in a definite plane).
Horizontally (in a definite plane).
Only when it forms a bud.
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