Chapter 1: Sexual Reproduction in Flowering Plants — Online MCQ Test
BIOLOGY · CLASS 12 SECOND PUC · Karnataka State Board
Practice Chapter 1: Sexual Reproduction in Flowering Plants with a free chapter-wise online MCQ test.
This chapter covers: Flower Morphology Microsporogenesis Megasporogenesis Pollination Double Fertilisation Embryo Sac Pollen Grain Seed Formation Fruit Development Angiosperms.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 1: Sexual Reproduction in Flowering Plants — Important Questions & Answers
What is the functional unit of sexual reproduction in flowering plants?
- A. Leaf
- B. Flower
- C. Stem
- D. Root
Answer: B. Flower
The flower is the reproductive organ of flowering plants and contains both male and female reproductive structures.
The flower is the reproductive organ of flowering plants and contains both male and female reproductive structures.
Which of the following is NOT a part of the flower's male reproductive system?
- A. Anther
- B. Filament
- C. Carpel
- D. Pollen grain
Answer: C. Carpel
Carpel is the female reproductive part of the flower; anther, filament, and pollen grain are parts of the male stamen.
Carpel is the female reproductive part of the flower; anther, filament, and pollen grain are parts of the male stamen.
In a typical polygonum-type embryo sac, how many nuclei are present at maturity?
- A. Three
- B. Five
- C. Seven
- D. Nine
Answer: C. Seven
The mature polygonum-type embryo sac typically contains 7 nuclei arranged as: 3 in the egg apparatus, 2 polar nuclei, and 2 antipodal cells.
The mature polygonum-type embryo sac typically contains 7 nuclei arranged as: 3 in the egg apparatus, 2 polar nuclei, and 2 antipodal cells.
Which statement correctly describes the relationship between fruit and seed formation?
- A. Fruits develop before seeds form
- B. Seeds develop independently of fruit formation
- C. Fruit develops from the ovary after fertilization; seeds develop from ovules
- D. Fruits and seeds are the same structure
Answer: C. Fruit develops from the ovary after fertilization; seeds develop from ovules
After double fertilization, the ovary wall develops into the fruit (pericarp) while ovules mature into seeds containing the embryo and endosperm.
After double fertilization, the ovary wall develops into the fruit (pericarp) while ovules mature into seeds containing the embryo and endosperm.
A botanist observes that in a particular angiosperm species, the megaspore mother cell undergoes meiosis to produce four spores, but only one develops into a functional embryo sac. The three others degenerate. This pattern is most likely due to:
- A. Mutation during meiosis
- B. Nutritional competition where the developing megaspore suppresses others through differential nutrient allocation
- C. Random genetic events
- D. Chromosomal abnormalities in three megaspores
Answer: B. Nutritional competition where the developing megaspore suppresses others through differential nutrient allocation
This is a developmental pattern where the first-formed megaspore receives maximum nutrient allocation from the nucellus, while others degenerate due to limited resources.
This is a developmental pattern where the first-formed megaspore receives maximum nutrient allocation from the nucellus, while others degenerate due to limited resources.