- Well exposed stamens and stigma
- Many ovules in each ovary
- Flowers are small and not brightly coloured
- Pollen grains are light and non-sticky
What is the function of the germ pore?
Emergence of radicle
Absorption of water for seed germination
Initiation of pollen tube
Release of male gametes
What are synergids?
What is chasmogamy and it is chasmogamy and cleistogamy are related with each other?
The non-motile male and female gametes produced in flowering plants are brought together for fertilisation by a mechanism called __________.
- Monoecious plant bearing unisexual flowers
- Dioecious plant bearing only male or female flowers
- Monoecious plant with bisexual flowers
- Dioecious plant with bisexual flowers.
Which one of the following statements in not true?
Honey is made by bees by digesting pollen collected from flowers
Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups
Pollen grains of some plants cause severe allergies and bronchial afflictions in some people
The flowers pollinated by flies and bats secrete foul odour to attract them
Entomophily is pollination by _____.
Name the process of entry of pollen tube through micropyle.
Even in the absence of pollinating agents, the seed setting is assured in:
How is emasculation carried out in flowers?
What is the function of filiform apparatus?
- A-i, B-ii, C-iii
- A-iii, B-i, C-ii
- A-iii, B-ii, C-i
- A-ii, B-iii, C-i
Which of the following is the correct sequence of events of sexual reproduction in a flower?
pollination, fertilization, seedling, embryo
seedling, embryo, fertilization, pollination
pollination, fertilization, embryo, seedling
embryo, seedling, pollination, fertilization
Which one of the following statements is correct regarding pollination?
Xenogamy occurs only by wind pollination
Cleistogamous flowers are always autogamous
Geitonogamy involves the pollen and stigma of flowers of different plants
Chasmogamous flowers do not open at all
- only Angiosperms
- only Gymnosperms
- Easily propagated
- Resistant to diseases
- Little liable to lose vigour due to absence of sexual reproduction
- With long lifespan
Statement 1: Fusion of egg with male gamete is called apogamy and the resultant structure is haploid
Statement 2: Primary endosperm nucleus (PEN) is a diploid structure
Statement 3: Synergids are haploid
Statement 4: Synergids bears filiform apparatus
- 1 and 4
- 1 and 2
- 3 and 4
- 2 and 4
What is siphonogamy?
What are the forms of hydrophytes?
What is head inflorescence?
Is cucumber dioecious?
Give reasons why plant and animals depend on each other?