Seeds offer several advantages to angiosperms. Seed formation is more dependable because:
1. Seeds have better adaptive strategies for dispersal
2. Reproductive processes become independent of water
3. Hard seed coat provides protection to the young embryos
4. They generate new genetic combinations leading to variations
The asexual production of seeds is called as:
1. Adventition
2. Fragmentation
3. Self-fertilization
4. Apomixis
The following diagram shows:
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Which layer of the anther wall helps in its dehiscence?
1. | A | 2. | B |
3. | C | 4. | D |
Consider the following statements:
I: | A monoecious plant bears either male or female flowers. |
II: | In monoecious plants, autogamy may be prevented but not geitonogamy. |
III: | Cucurbits and coconuts are monoecious plants. |
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
Flowers, which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
(1) water
(2) bee
(3) wind
(4) bat
Functional megaspore in an angiosperm develops into
(1) ovule
(2) endosperm
(3) embryo sac
(4) embryo
Wind pollination is common in
(1) lilies
(2) grasses
(3) orchids
(4) legumes
Unisexuality of flowers prevents
(1) autogamy, but not geitonogamy
(2) Both geitonogamy and xenogamy
(3) geitonogamy, but not xenogammy
(4) autogamy and geitonogamy