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Test: Pollination - NEET MCQ


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15 Questions MCQ Test Biology Class 12 - Test: Pollination

Test: Pollination for NEET 2024 is part of Biology Class 12 preparation. The Test: Pollination questions and answers have been prepared according to the NEET exam syllabus.The Test: Pollination MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Pollination below.
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Test: Pollination - Question 1

The plant shown in the given diagram is most likely to be pollinated by:

 

Detailed Solution for Test: Pollination - Question 1

The plant in the diagram is likely pollinated by wind.

Here's why:

- The plant has feathery structures resembling stigmas, which catch pollen.
- The lack of showy petals or nectar suggests a reliance on wind.
- Wind-pollinated plants typically have lightweight pollen that can be carried by ai
Therefore, based on its characteristics, wind is the most likely pollination method for this plant.

Test: Pollination - Question 2

The diagram of NCERT given below shows two types of flowers in a certain plant:

Statement I:Cleistogamous flowers have an advantage and a disadvantage over chasmogamous flowers.

Statement II:Seed set is assured even in the absence of pollinators but the amount of genetic variations is less in cleistogamous flowers when compared to the chasmogamous flowers.

Detailed Solution for Test: Pollination - Question 2

The correct answer is: D: Statement I is correct; Statement II is correct and Statement II explains Statement I.

- Explanation:
- Cleistogamous flowers have an advantage and a disadvantage over chasmogamous flowers.
- Seed set is assured even without pollinators, but genetic variations are less in cleistogamous compared to chasmogamous flowers.
- This means that cleistogamous flowers ensure seed production without external help, but with limited genetic diversity, which is explained by the second statement.

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Test: Pollination - Question 3

From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

Detailed Solution for Test: Pollination - Question 3

To prevent both autogamy and geitonogamy, the correct choice is C:

Dioecious plant bearing only male or female flowers. Here's why:

- Dioecious plants have separate male and female individuals, reducing the likelihood of self-pollination.
- By having only male or female flowers on each plant, cross-pollination between different plants is necessary for fertilization, preventing both autogamy (self-pollination) and geitonogamy (pollination between different flowers of the same plant).

Test: Pollination - Question 4

In which of the following is pollination autogamous?

Detailed Solution for Test: Pollination - Question 4
  • Cleistogamy is autogamous pollination.
  • Cleistogamous flowers are those that stay close together to avoid cross pollination and have adaptations to assist self pollination.
  • Self-pollination Or Autogamy:

    Fig: Cleistogamous Flowers (inside unopened buds)
  • Geitonogamy is the transfer of pollen grains from the anther to the stigma of another flower of the same plant.
  •  Xenogamy is the transfer of pollen grains from anther to the stigma of a different plant.
  • Chasmogamous flowers which are similar to flowers of other species with exposed anthers and stigma. It helps in both self and cross pollination of flowers.

Hence, the correct option is A

NCERT Reference: Topic “Pollination” of chapter "Sexual Reproduction in Flowering Plants" of NCERT

Test: Pollination - Question 5

What is emasculation, and why is it necessary in artificial hybridization?

Detailed Solution for Test: Pollination - Question 5

Emasculation is the process of removing the anthers from the flower bud to prevent self-pollination. It is necessary in artificial hybridization to ensure that only the desired pollen is used for pollination and to avoid contamination with unwanted pollen.

NCERT Reference: Topic “Outbreeding devices” of chapter "Sexual Reproduction in Flowering Plants" of NCERT

Test: Pollination - Question 6

Choose the correct statement from the following:

Detailed Solution for Test: Pollination - Question 6

Correct Answer: D

- Autogamy refers to the process where a flower is self-pollinated, ensuring fertilization without needing another flower.
- Cleistogamous flowers are self-pollinating flowers that never open, ensuring autogamy.
- Therefore, it is accurate to say that cleistogamous flowers always exhibit autogamy as they are designed to self-pollinate without the need for external agents like insects or wind.

Test: Pollination - Question 7

Which of the following is/are a marine plant pollinated by water?

Detailed Solution for Test: Pollination - Question 7

Zostera is mainly called as marine eelgrass and pollinated by water method . This process is known as Hydrophily. Vallisneria is epihydrophily which occurs through the surface of the water.

So, the correct option is C.

Test: Pollination - Question 8

Wind pollination is common in:

Detailed Solution for Test: Pollination - Question 8
  • Wind pollination is common in grasses.
  • Grasses produce a large amount of pollen which by the help of wind reach to the stigma for reproduction.

How Flowers Make Seeds: Part I POLLINATION

Hence, the correct option is C
NCERT Reference: Topic “Agents of Pollination” of chapter Sexual Reproduction in Flowering Plants of NCERT

Test: Pollination - Question 9

When pollen is transferred from the anther of one flower to the stigma of another flower of the same plant, pollination is referred to:

Detailed Solution for Test: Pollination - Question 9
  • In self-pollinating plants, there is less dependence on external factors to cause pollination.
  • These plants depend on wind or other smaller insects that visit the flower regularly.
  • In self- pollinating flowers, the anthers, and stigma are of similar lengths to facilitate the transfer of pollen.

Self -pollination can be further divided into two types:

  1. Autogamy– In this type of self-pollination, the pollen is transferred from the anthers of one flower to the stigma of the same flower.
  2. Geitonogamy– In this type of self- pollination, the anthers are transferred from the anthers of one flower to the stigma of another flower but on the same plant.

Self Pollination:
Define Geitonogamy. | Biology Questions

Hence, the correct option is A

NCERT Reference: Topic “Pollination” of chapter "Sexual Reproduction in Flowering Plants" of NCERT

Test: Pollination - Question 10

What is the role of the filiform apparatus in the ovule, and how does it guide the entry of the pollen tube?

Detailed Solution for Test: Pollination - Question 10

The filiform apparatus, present at the micropylar part of the synergids, guides the entry of the pollen tube into the ovule. It plays a crucial role in ensuring that the pollen tube reaches the female gametophyte within the ovule for fertilization to occur.

NCERT Reference: Topic “Pollination” of chapter "Sexual Reproduction in Flowering Plants" of NCERT

Test: Pollination - Question 11

The type of pollination that brings genetically different types of pollen grains to the stigma of a plant is

Detailed Solution for Test: Pollination - Question 11
  1. Geitonogamy is a type of self pollination in which pollen is transferred from the anther of one flower to the stigma of another flower of the same plant.
  2. Xenogamy is the cross-pollination between the flowers of different plants. It produces hererozygosity because two genetically different parents are involved.
    Cross-pollination is the transfer of pollen grains from anther to stigma of different flower
  3. Chasmogamy is the condition in which bisexual flowers have exposed anthers and stigma. Both self-pollination and cross pollination can occur in these flowers.
  4. Autogamy is a type of self-pollination in which pollen is transferred from the anther to the stigma of the same flower.

Thus, it's xenogamy that can bring genetically different pollen grains to the stigma of a plant.

Hence, the correct option is B
NCERT Reference: Topic “Pollination” of chapter "Sexual Reproduction in Flowering Plants" of NCERT

Test: Pollination - Question 12

Wind-pollinated flowers are characterized by the following, except

Detailed Solution for Test: Pollination - Question 12

Wind-pollinated flowers are characterized by traits facilitating pollination by wind.

The exception is D: Many ovules in each ovary. its actually Wind pollinated flowers often have a single ovule in each ovary and numerous flowers packed into an inflorescence; a familiar example is the corn cob – the tassels you see are nothing but the stigma and style which wave in the wind to trap pollen grains.Here's why:

- Wind-pollinated flowers typically have:
- Large, often-feathery stigma to catch airborne pollen effectively.
- Light and non-sticky pollen grains that can be carried by the wind.
- Well-exposed stamens for easy dispersal of pollen.
- Having many ovules in each ovary is not a characteristic related to wind pollination; it's more about seed development after pollination.

Test: Pollination - Question 13

The diagram shows:

Detailed Solution for Test: Pollination - Question 13

The correct answer is D: Pollination by water in Vallisneria.

- Vallisneria is a submerged aquatic plant that relies on water for pollination.
- It has separate male and female flowers on different plants.
- Male flowers detach and float on the water surface, releasing pollen.
- The pollen is then carried by water currents to reach the female flowers for pollination.
- This method ensures successful fertilization in underwater environments.

Test: Pollination - Question 14

What are the three types of pollination based on the source of pollen?

Detailed Solution for Test: Pollination - Question 14

Pollination can be categorized into three types based on the source of pollen: autogamy (pollination within the same flower), geitonogamy (pollination between flowers of the same plant), and xenogamy (pollination between flowers of different plants).

 

NCERT Reference: Topic “Types of Pollination” of chapter "Sexual Reproduction in Flowering Plants" of NCERT

Test: Pollination - Question 15

Assertion : Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation.
Reason : Sporopollenin is absent in the region of germ pores.

Detailed Solution for Test: Pollination - Question 15

- Both the assertion and reason are true.
- Assertion: Exine of a pollen grain is made of sporopollenin, resistant to extreme conditions.
- Reason: Sporopollenin absence at germ pores is unrelated to its resistance.
- Sporopollenin's durability doesn't depend on its presence at germ pores.
- Choice B: Both statements are accurate, but the reason doesn't directly explain the assertion's resistance properties.

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