Pollination

Q. Do you think that cleistogamy is advantageous or disadvantageous to the plant? Why?

Q. a) How many ovules are present in an ovary?

Q. Which of the following is incorrect for wind-pollinated plants?

1. Well exposed stamens and stigma
2. Many ovules in each ovary
3. Flowers are small and not brightly coloured
4. Pollen grains are light and non-sticky

Q.

Define pollination?

Q. Do the animals who visit plants like Cucumber, Mango, Peepal, Coriander, Papaya, Onion, Lobia, Cotton, Tobacco, Rose, Lemon, Eucalyptus, Banana, can act as pollinators?

Q.

What is the function of the germ pore?

1. Emergence of radicle

2. Absorption of water for seed germination

3. Initiation of pollen tube

4. Release of male gametes

Q.

What are synergids?

Q.

What is chasmogamy and it is chasmogamy and cleistogamy are related with each other?

Q.

The non-motile male and female gametes produced in flowering plants are brought together for fertilisation by a mechanism called __________.

1. Pollination

2. Apomixis

3. Syngamy

4. Parthenogenesis

Q. From among the following situations, choose the one that prevents both autogamy and geitonogamy.

1. Monoecious plant bearing unisexual flowers
2. Dioecious plant bearing only male or female flowers
3. Monoecious plant with bisexual flowers
4. Dioecious plant with bisexual flowers.

Q.

Which one of the following statements in not true?

1. Honey is made by bees by digesting pollen collected from flowers

2. Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups

3. Pollen grains of some plants cause severe allergies and bronchial afflictions in some people

4. The flowers pollinated by flies and bats secrete foul odour to attract them

Q.

Entomophily is pollination by _____.

Q.

Name the process of entry of pollen tube through micropyle.

1. Porogamy

2. Mesogamy

3. Chalazogamy

4. Pseudogamy

Q.

Even in the absence of pollinating agents, the seed setting is assured in:

1. Zostera

2. Commelina

3. Salvia

4. Ficus

Q.

How is emasculation carried out in flowers?

Q.

What is the function of filiform apparatus?

Q. Why are night-blooming flowers generally white?

Q. Match the following columns and choose the correct option.
$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{A. Autogamy}& \text{i. Transfer of pollen grains from anther}\\ & \text{to the stigma of a different plant.}\\ \text{B. Xenogamy}& \text{ii. Transfer of pollen grains from the anther to}\\ & \text{the stigma of another flower of the same plant.}\\ \text{C. Geitonogamy}& \text{iii. Transfer of pollen grains from the}\\ & \text{anther to the stigma of the same flower.}\end{array}$

1. A-i, B-ii, C-iii
2. A-iii, B-i, C-ii
3. A-iii, B-ii, C-i
4. A-ii, B-iii, C-i

Q.

Which of the following is the correct sequence of events of sexual reproduction in a flower?

1. pollination, fertilization, seedling, embryo

2. seedling, embryo, fertilization, pollination

3. pollination, fertilization, embryo, seedling

4. embryo, seedling, pollination, fertilization

Q.

Which one of the following statements is correct regarding pollination?

1. Xenogamy occurs only by wind pollination

2. Cleistogamous flowers are always autogamous

3. Geitonogamy involves the pollen and stigma of flowers of different plants

4. Chasmogamous flowers do not open at all

Q. Pollen grains are carriers of male gametes in

1. pteridophytes
2. Spermatophytes
3. only Angiosperms
4. only Gymnosperms

Q. Hybrid vigour is best maintained in vegetatively reproducing plants because they are

1. Easily propagated
   
2. Resistant to diseases
3. Little liable to lose vigour due to absence of sexual reproduction
   
4. With long lifespan
   

Q. Which of the following statements is/are incorrect?
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. 1 and 4
2. 1 and 2
3. 3 and 4
4. 2 and 4

Q.

What is siphonogamy?

Q.

What are the forms of hydrophytes?

Q. How does the bee know which flower has nectar?

Q.

What is head inflorescence?

Q.

Is cucumber dioecious?

Q.

Give reasons why plant and animals depend on each other?

Q. Axis of inflorescence is :

1. Pedicel
2. Peduncle
3. Petiole
4. All