Biotic Agents for Cross Pollination

Q. Which of the following characteristics indicates that a flower is hydrophilous?
(i) It produces pollen grains in large numbers.
(ii) Some pollen grains have specific gravity that is very similar to that of water.
(iii) Some plants have male flowers floating on the water surface till they meet the female flowers.
(iv) Vallisneria is a water-pollinated flower.

1. (ii), (iii), and (iv)
2. (ii) and (iv)
3. All of the above
4. (i), (ii), and (iii)

Q.

Statement 1: Ornithophilous flowers secrete large quantities of nectar.

Statement 2: Ornithophilous flowers are tubular in shape and mostly of scarlet color.

1. Both statements are true. Statement 2 is the correct explanation of Statement 1.

2. Both statements are true. But Statement 2 is not the correct explanation of Statement 1.

3. Statement 1 is false. Statement 2 is true.

4. Statement 1 is true. Statement 2 is false.

Q.

Explain the following terms :
(a) Ornithophily.
(b) Elephophily.
(c) Artificial pollination.

Q. Match the following pollinating agents with the names of methods.
$\begin{array}{cccc}1.& Entomophily& a.& Pollinationbysnails\\ 2.& Ornithophily& b.& Pollinationbywater\\ 3.& Anemophily& c.& Pollinationbyinsects\\ 4.& Malacophily& d.& Pollinationbybirds\\ 5.& Hydrophily& e.& Pollinationbywind\end{array}$

1. 1-a, 2-b, 3-c, 4-d, 5-e
2. 1-b, 2-e, 3-a, 4-d, 5-c
3. 1-c, 2-d, 3-e, 4-a, 5-b
4. 1-d, 2-c, 3-e, 4-b, 5-a

Q.

How does honey bee help in cross fertilization ?

Q.

The chief pollinating agent for maize plants is___.

Q.

Describe the nectar feature of entomophilous flowers.

Q.

Biotic pollinators are preferred over abiotic pollinators.

1. True

2. False

Q.

Which of the following are not biotic pollinators?

1. Air

2. Insects

3. Water

4. Birds

Q. Circinate vernation in leaves is caused due to

1. Epinasty
2. Hyponasty
3. Apostrophe
4. None of the above

Q.

Entomophilous flowers are larger compared to Anemophilous flowers.

1. True.

2. False

Q.

Among the following, which are forms of biotic pollination?

1. Ornithophily

2. Elephophily

3. Entomophily

4. Anemophily

Q.

Give five features of water pollinated flowers .

Q. Lodicules are

1. Bracteoles
2. Perianth
3. Petals
4. Bracts

Q.

Match the following
$\begin{array}{cccc}A.& \text{Zoophily}& 1.& \text{Pollination by birds}\\ B.& \text{Ornithophily}& 2.& \text{Pollination by insects}\\ C.& \text{Entomophily}& 3.& \text{Pollination by bats}\\ D.& \text{Chiropterophily}& 4.& \text{Pollination by animals}\end{array}$

1. A – 3, B – 2, C – 1, D – 4

2. A – 1, B – 2, C – 3, D – 4

3. A – 4, B – 1, C – 2, D – 3

4. A – 4, B – 2, C – 1, D – 3

Q. Which of the following mammalian character has no exception?

1. External ears
2. Diaphragm
3. Enucleated RBC
4. Corpus callosum

Q. The flowers that have bright coloured petals and tubular flowers are pollinated by:

1. Wind
2. Water
3. Birds
4. Bees

Q. Which of the following is/are the important consideration(s) for a good quality and yield of honey?

1. Foraging pattern
2. Quantity of pasturage
3. Location of apiary
4. Quality of pasturage

Q.

Mention the types of adaptation found in cross pollinated plants.