Abiotic Agents for Cross Pollination

Q.

Mention a few characteristics of insect-pollinated flowers.

Q.

List the characteristic features of flowers pollinated by wind and by insects.

Q.

Differentiate between wind pollinated and insect pollinated.

Q. Choose the correct statements from the following.
I) Both wind and water pollinated flowers are very colourful and produce nectar.
II) Wind-pollinated flowers have large feathery stigma to easily trap air-borne pollen grains.
III) Flies are the dominant biotic pollinating agents.
IV) Pollination by water is quite rare in flowering plants and is limited to about 30 genera, mostly monocotyledons.

1. II and IV are correct
2. I and IV are correct
3. II and III are correct
4. I and III are correct

Q. Select the incorrect statement about pollen grains.

1. Pollen grains are rich in nutrients
2. Its consumption increases the performance of athletes and race horses
3. It can be stored for years in liquid nitrogen
4. Pollen grains possess non-sticky covering called pollen kitt

Q. The plant-animal interactions often involve co-evolution of the mutualists. Which among the following is a very good example of mutualism and coevolution?

1. Interaction between phytophagous insects and plants
2. Interaction between prickly pear cactus and cactus feeding moth
3. Interaction between fig plant and female wasp
4. Both a and b

Q.

Which of the following is mostly pollinated by wind?

1. Sunflower

2. Vallisneria

3. Maize

4. Hibiscus

Q. Assertion: Fig and wasp cannot complete their life cycle without each other
Reason: It is mutualistic relationship

1. Both assertion and reason are true and reason is the correct explanation of assertion
2. Both assertion and reason are true but reason is not the correct explanation of assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false

Q. Both wind and water pollinated flowers are not very colourful and do not produce nectar. What would be the reason for this ?

Q. Assertion: In opposite phyllotaxy two leaves are borne on the opposite sides of a single node.

Reason: Opposite phylotaxy is seen in china rose and oleander.

1. If both assertion and reason are true and reason is the correct explanation of assertion
2. If both assertion and reason are true but reason is not the correct explanation of assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false

Q.

Pollination by bats is called as

Q. Light and dry pollen is a characteristic feature of flowers pollinated by ____.

1. wind

2. water

3. insect

4. birds

Q. Explain the process of pollination in Vallisneria. How is it different in water-lily, which is also an aquatic plant? [3]

Q. What are the favourable conditions for spore formation? Explain with reasons.

Q.

Name one flower pollinated by wind.

Q.

Can flowers pollinate in the complete absence of wind?

Q. Choose the correct statement(s) regarding pollen grains.
I. Pollen grains are the male gametes of the flowering plant.
II. Pollen grain has a prominent two-layered wall.
III. The outer thick wall of pollen grain is called exine and the inner thin wall is called intine.
IV. The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic materials known.

1. I, II and IV are correct
2. II, III and IV are correct
3. I, II and III are correct
4. All are correct

Q.

Why are pollen grains produced in enormous quantity in maize?

Q. Choose the correct option from the brackets:​

(i) Vallisneria is pollinated by (water, insect, wind, birds)​

Q.

Differentiate between the following:

Insect pollinated and wind pollinated flowers

Q. In which of the following is pollinia found?

1. Mango
2. China rose
3. Calotropis
4. Rose

Q. Yucca is pollinated by.

1. Honey Bee
2. Butterfly
3. Pronuba Moth
4. Bumble Bee

Q. Write ‘True’ or ‘False’ for the statement given below:
In $Vallisneria,$ the male flowers are released in air.

Q. Pollination occurs through water current in:
[0.7 mark]

1. Oxalis
2. Viola
3. Water hyacinth
4. Zostera

Q. Explain the following term : Elephophily.

Q. _______ flowers have very light weighted pollen grains.

1. Insect pollinates
2. Wind pollinated
3. Water pollinated
4. Animal pollinated

Q.

Assertion (A): Plants pollinated by abiotic agents produce enormous amounts of pollen as compared to plants pollinated by biotic agents.

Reason (R): Pollen grains coming in contact with stigma is a chance factor in anemophily and hydrophily.

1. Both A and R are true and R is the correct explanation to A.

2. A is true and R is false.

3. Both A and R are false.

4. A is false and R is true.

Q. What is malacophily?

Q. Wind-pollinated flowers are

1. Small, producing large number of dry pollens
2. Large, producing abundant nectar and pollen
3. Small, brightly coloured, producing large number of pollen grains
4. small producing nector and dry pollen

Q. Winged pollen grains are found in

1. Cycas
2. Selaginella
3. Pinus
4. Dryopteris