1. What is meant by heterospory? Mention the two types of spores developed in an angiospermic plant.
A: Production of two types of spores by a plant is called heterospory. Microspores and megaspores.
2. Which of the following are monoecious and dioecious organisms?
a) Date palm b) Coconut c) Chara d) Marchantia
A: Date palm - dioecious
Coconut - monoecious
Chara - monoecious
Marchantia - dioecious
3. What do the following parts of a flower develop into after fertilization?
a) ovary b) stamens c) ovules d) calyx
A: Ovary - fruit
Stamens - fall off
Ovules - seeds
Calyx - falls off ( In plants like Solanum it is persistent after fertilization)
4. Define vivipary with an example.
A: Vivipary is the germination of the seeds while still attached to the mother plant.
Ex: Rhizophora (mangrove).
5. Name the component cells of the egg apparatus in an embryosac.
A: One egg cell. Two synergids.
6. Name the common functions that cotyledons and nucellus perform.
A: Both cotyledons and nucellus contain abundant food materials. The cotyledons provide food and energy to the germinating seed. The nucellus provides food for the growing embryo.
7. Name the parts of pistil which develop into fruit and seeds.
A: Ovary develops into fruit. Ovule develops into seed.
8. Which are the three cells found in a pollen grain when it is shed at the three celled stage?
A: One vegetative cell and Two male gametes.
9. What is self-incompatibility?
A: The inability of pollen to germinate on the stigma of the same flower is called self incompatibility or self-sterility. Ex: Abutilon
10. Name the parts of an angiosperm flower in which development of male and female gametophyte take place.
A: Male gametophyte - pollen grain.
Female gametophyte (embryosac) - nucellus of the ovule.
11. What is meant by scutellum? In which type of seeds it is present?
A: The cotyledon of a monocot embryo is called scutellum. It is present in monocot seeds Ex: Grasses.
12. Define with examples endospermic and non-endospermic seeds.
A: Endospermic seeds - castor and coconut. Non endospermic seeds -
groundnut, beans and peas.
13. What is Omega Taxonomy?
A: The taxonomy which uses information from other sources like embryology, cytology, palynology, phyto chemistry, serology etc. along with morphological features is known as Omega Taxonomy.
14. What is natural system of plant classification? Name the scientists who followed it.
A: The system of classification that considers all possible morphological characters and their natural relationships is called natural system of classification. Bentham and Hooker followed this system.
15. Give the technical description of anthers of Allium cepa.
A: Anthers of Allium cepa are dithecous, basifixed, introrse and show longitudinal dehiscence.
16. What is geocarpy? Name the plant which exhibits this phenomenon.
A: Production of fruit inside the soil is called geocarpy. Arachis hypogea (groundnut).
17. Name the type of pollination mechanism found in members of Fabaceae.
A: Piston mechanism.