Chapter 1: Asexual and Sexual Reproduction in Plants — Online MCQ Test
BOTANY · CLASS 12th · Tamil Nadu State Board
Practice Chapter 1: Asexual and Sexual Reproduction in Plants with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers natural and artificial vegetative propagation methods along with sexual reproduction in angiosperms. Students study microsporogenesis megasporogenesis pollinati....
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Chapter 1: Asexual and Sexual Reproduction in Plants — Important Questions & Answers
Which of the following plants produces epiphyllous buds on its leaves, which aid in natural vegetative propagation?
- A. Solanum tuberosum
- B. Bryophyllum
- C. Zingiber officinale
- D. Allium cepa
Answer: B. Bryophyllum
Bryophyllum produces epiphyllous buds along its leaf margins. When these leaves fall on moist soil, the buds develop into independent new plants.
Bryophyllum produces epiphyllous buds along its leaf margins. When these leaves fall on moist soil, the buds develop into independent new plants.
The pollen wall layer 'exine' is highly resistant to physical and biological decomposition because of the presence of:
- A. Pectocellulose
- B. Callose
- C. Sporopollenin
- D. Sporopollenin-associated proteins
Answer: C. Sporopollenin
Sporopollenin is an extremely durable organic polymer that forms the exine layer of pollen grains, protecting them from chemical, thermal, and biological degradation.
Sporopollenin is an extremely durable organic polymer that forms the exine layer of pollen grains, protecting them from chemical, thermal, and biological degradation.
During microsporogenesis, the tapetum cells lose their walls and their protoplasts fuse to form a plasmodium in which of the following tapetal types?
- A. Secretory tapetum
- B. Glandular tapetum
- C. Amoeboid tapetum
- D. Parietal tapetum
Answer: C. Amoeboid tapetum
In the amoeboid (invasive) tapetum, the cell walls break down and the protoplasts fuse to form a multinucleate tapetal plasmodium that directly bathes the developing microspores.
In the amoeboid (invasive) tapetum, the cell walls break down and the protoplasts fuse to form a multinucleate tapetal plasmodium that directly bathes the developing microspores.
Match the following apomictic terms with their descriptions: 1. Adventive embryony - i. Embryo arises from unfertilized egg cell 2. Parthenogenesis - ii. Embryo arises directly from diploid sporophytic cells like nucellus 3. Apogamy - iii. Embryo arises from synergids or antipodals without fertilization
- A. 1-ii, 2-i, 3-iii
- B. 1-i, 2-ii, 3-iii
- C. 1-iii, 2-i, 3-ii
- D. 1-ii, 2-iii, 3-i
Answer: A. 1-ii, 2-i, 3-iii
Adventive embryony involves embryo development directly from sporophytic tissues like nucellus/integuments. Parthenogenesis is development from an unfertilized egg. Apogamy is development of embryo from gametophytic cells other than the egg.
Adventive embryony involves embryo development directly from sporophytic tissues like nucellus/integuments. Parthenogenesis is development from an unfertilized egg. Apogamy is development of embryo from gametophytic cells other than the egg.
During the development of a dicot embryo in Capsella bursa-pastoris, the basal cell divides transversely to form a 6 to 10-celled suspensor. The uppermost cell of the suspensor (nearest the micropyle) swells up to form the ________, while the lowermost cell of the suspensor acts as the ________.
- A. Hypophysis, Haustorium
- B. Haustorium, Hypophysis
- C. Radicle, Plumule
- D. Cotyledon, Hypophysis
Answer: B. Haustorium, Hypophysis
The uppermost cell of the suspensor swells up to become the haustorium (which absorbs nutrition), while the lowermost cell of the suspensor is the hypophysis, which gives rise to parts of the radicle and root cap.
The uppermost cell of the suspensor swells up to become the haustorium (which absorbs nutrition), while the lowermost cell of the suspensor is the hypophysis, which gives rise to parts of the radicle and root cap.