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Define Niche.
Concept: Population Interactions
What is Red Data Book?
Concept: Biodiversity
List any three major causes of loss of biodiversity.
Concept: Loss of Biodiversity
What is symbiosis?
Concept: Reproduction in Organisms
Explain the term perianth.
Concept: Reproduction in Organisms
Give the biological name of the following:
Baker’s yeast
Concept: Types of Reproduction > Asexual Reproduction
The following question(s)/statement(s) has four suggested answers. Choose the correct option in the following case.
After fertilisation, the integuments of an ovule develop into : __________.
Concept: Sexual Reproduction in Animals > Pre-fertilisation Events in Organisms
What are seasonal breeders? Give an example.
Concept: Sexual Reproduction in Animals
How is the chromosome number maintained in sexually reproducing organisms?
Concept: Sexual Reproduction in Animals
State two advantages of vegetative propagation.
Concept: Types of Reproduction > Asexual Reproduction
Give two differences between heartwood and sapwood.
Concept: Reproduction in Organisms
Define perisperm.
Concept: Sexual Reproduction in Animals > Pre-fertilisation Events in Organisms
| Fertilisation is the key process in sexually reproducing organisms and it acts as a vital link between two generations. Flowering plants adopt a unique pattern of sexual reproduction as compared to other organisms. |
- Explain the process of fertilisation in angiosperms.
- What is the precise location and function of filiform apparatus in the embryo sac of angiosperms?
- Fruits and seeds are generally formed due to fertilisation. Name the process involved in the production of the following without fertilisation:
- Fruits
- Seeds
Concept: Sexual Reproduction in Animals > Pre-fertilisation Events in Organisms
Why is non-cyclic photo phosphorylation considered as a non-cyclic pathway?
Concept: Introduction of Sexual Reproduction in Flowering Plants
Triple Fusion involves:
(i) Fusion of one male, gamete with female gamete
(ii) Fusion of tube nucleus with generative nvcleus
(iii) Fusion of two polar nuclei.
(iv) Fusion of second male gamete with two polar nuclei
Concept: Fertilization Process
With the help of diagrams, name and describe the different types of placentation seen in angiosperms.
Concept: Introduction of Sexual Reproduction in Flowering Plants
Define Racemose inflorescence
Concept: Flower - a Fascinating Organ of Angiosperms
Give reasons for the following:
Secondary growth does not occur in monocot stems.
Concept: Parts of Flower > Essential Parts of Flower: Androecium
Describe the different types of vascular bundles.
Concept: Parts of Flower > Essential Parts of Flower: Androecium
If the haploid number of chromosomes in a plant species is 20, how many chromosomes will be
present in the cells of the shoot tip?
Concept: Introduction of Sexual Reproduction in Flowering Plants
