Which of the following is a characteristic feature of asexual reproduction in plants?
Answer: B
Asexual reproduction produces genetically identical clones of the parent plant without involving meiosis or gamete fusion.
Q.2Easy
The number of megaspores produced from a megasporocyte after meiosis is:
Answer: D
Meiosis in a megasporocyte produces four megaspores, though typically only one survives (functional megaspore).
Q.3Easy
Which structure in the flower is responsible for producing pollen grains?
Answer: B
The anther is the male reproductive organ that produces and contains pollen grains.
Q.4Easy
Vegetative reproduction through runners is observed in:
Answer: C
Strawberry reproduces vegetatively through runners (stolons) that develop new plants at nodes.
Q.5Easy
The mature male gametophyte in flowering plants is represented by:
Answer: B
A pollen grain is the mature male gametophyte consisting of two cells: vegetative and generative cell.
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Q.6Easy
In potato plants, the vegetative propagule is:
Answer: B
Potato propagates vegetatively through tubers, which are modified stems with nodes capable of producing new plants.
Q.7Easy
Which of the following is NOT a function of the filament in a stamen?
Answer: C
The filament supports and elevates the anther. Pollen production occurs in the anther's microsporangia, not in the filament. The filament conducts nutrients and water.
Q.8Easy
In the double fertilization process of angiosperms, one sperm nucleus fuses with the egg nucleus. What is the ploidy level of the resulting zygote?
Answer: B
When a haploid sperm (n) fuses with a haploid egg cell (n), the resulting zygote is diploid (2n), which develops into the embryo.
Q.9Easy
The ovule integument develops into the seed coat. How many integuments do most dicot plants possess?
Answer: B
Most dicotyledonous plants have bitegmic ovules (two integuments), which develop into the seed coat layers.
Q.10Easy
Which of the following plants reproduces primarily through runners or stolons?
Answer: B
Strawberry reproduces vegetatively through runners (stolons) that produce new plants at nodes, enabling rapid vegetative propagation.
Q.11Easy
Which stage of the plant life cycle shows dominance of the diploid phase in angiosperms?
Answer: B
In angiosperms, the sporophytic phase (diploid multicellular plant body) is dominant, while the gametophytic phase is reduced and represented by pollen and embryo sac.
Q.12Easy
Which of the following is true about microsporogenesis in plants?
Answer: B
Microsporogenesis is the meiotic division of the microspore mother cell (diploid) in the anther, producing four haploid microspores.
Q.13Easy
The embryo sac in angiosperms is typically a seven-celled, eight-nucleate structure. Which cells are located at the micropylar end?
Answer: A
The micropylar end of the typical embryo sac contains the egg apparatus consisting of one egg cell flanked by two synergids that help guide pollen tube growth.
Q.14Easy
Double fertilization in angiosperms results in the formation of:
Answer: B
Double fertilization involves one sperm nucleus fusing with the egg cell to form a diploid zygote, while the second sperm nucleus fuses with the two polar nuclei to form a triploid primary endosperm nucleus.
Q.15Easy
In the typical angiosperm flower, after anther dehiscence, pollen grains are released in which stage of pollen development?
Answer: B
In most angiosperms, pollen is released at the two-celled stage (bicellular pollen) consisting of a large vegetative cell and smaller generative cell. Second mitosis occurs after pollination.
Q.16Easy
The integuments of an ovule serve primarily to:
Answer: B
Integuments are the outer layers of the ovule that develop into the seed coat (testa) after fertilization, providing protection to the seed.
Q.17Easy
The ovule of a typical angiosperm is attached to the placenta through which structure?
Answer: B
The funiculus (also called funicle) is the stalk that attaches the ovule to the placenta. The raphe is a ridge formed by the fusion of funiculus with the integument in some ovules.
