EAMCET Botany Important Questions with Key

1) The condition where Pollengrains of one flower reach the stigma of the another flower of another plant belonging to the same species is calledäéπ
1. Self pollination 2. Autogamy 3. Geitonogamy 4. Xenogamy

2) Cleistogamous flowers are underground and Chasmogamous flowers are developed aerially in
1. Helianthus
2. Cestrum nocturnum
3. Commelina benghalensis
4. Scrophularia

3) In Gossypium Self pollination is prevented by one of the following conditioní
1. Dicliny 2. Protandry 3. Protogyny 4. Herkogamy

4) Assertion (A): The type of pollination which occurs in gymnosperms is called direct pollination.
Reason (R): In gymnosperms pollengrains fall on the Stigma.
1. Both A and R are true. R is the correct explanation of A.
2. Both A and R are true. R is not the Correct explanation of A.
3. A is true and R is false
4. A is false and R is true

5) Assertion (A): The flowers of Scrophularia though they are bisexual cross pollination is favoured and self pollination is avoided.
Reason (R): Flowers of Scrophularia exhibit protogyny.
1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true and R is not the correct explanation of A.
3. A is true and R is false
4. A is false and R is true

6) The arrangement of male and female reproductive organs at different levels in a bisexual flower is called-
1. Dichogamy 2. Protogyny 3. Herkogamy 4. Self sterility

7) Dimorphic flowers are seen in one of the following pair
1. Lythrum and Oxalis
2. Lythrum and Passiflora
3. Oxalis and Gloriosa
4. Primula and Oldenlandia

8) Pollen of the some plants may cause poison which may leads to the withering of flowers is seen in one of the following
1. Mimulus 2. Oldenlandia 3. Orchids 4. Hibiscus

9) Study the following lists.
List-1 List-2
A. Dicliny I. Helianthus
B. Protandry II. Lythrum
C. Protogymy III. Vallisneria
D. Triheterostyly IV. Solanum
V. Passiflora
The correct match is:
A B C D
1. II, V, III, I
2. III, I, IV, II
3. V, IV, III, II
4. I, III, IV, V

10) Pick out the correct statement from the following
1. In flowers of Hibiscus stigmas and stamens bend in opposite direction.
2. Flowers of Oldenlandia exhibit pollen prepotency
3. In flowers of Caltha stamens and ovary mature at the same time.
4. The flowers of Martynia are associated with self sterility.

11) Identify the correct match from the following
1. Self Sterility - Abutilon
2. Sensitive Stigmas - Primula.
3. Protandry - Solanum
4. Pollen Prepotency - Martynia.

12) The condition where the stigmas bend in opposite direction to the stamens in a flower is seen in-
1. Gossypium 2. Solanum 3. Dolichos 4. Gloriosa

13) It is one of the mechanism seen in bisexual flowers where the
reproductive organs mature at different times to promote cross pollination by preventing self pollination is-
1. Herkogamy 2. Dichogamy 3. Homogamy 4. Pollen Prepotency

14) Species of Ranunculus are characterised by the presence of one of the following contrivance which favour the self pollination.
1. Self sterility 2. Dichogamy 3. Homogamy 4. Herkogamy

15) Self pollination is prevented and cross fertilization is favoured in flowers of Dolichos by
1. Self sterility 2. Pollen prepotency 3. Herkogamy 4. Homogamy

16) Study the following lists.
List-1 List-2
(Pollination) (Taxon)
A. Anemophily I. Begnonia
B. Epihydrophily II. Zostera
C. Hypo hydrophily III. Vallisneria
D. Ornithophily IV. Oryza
V. Aroids
The correct match is:
A B C D
1. IV, III, II, I
2. III, II, I, V
3. V, IV, III, II
4. I, IV, II, III

17) Which of the following contrivance favours the self pollination in disc florets of Tridax when cross pollination fails to occur?
1. Homogamy 2. Safety Mechanism 3. Cleistogamy 4. Dicliny

KEY : 1.4 2.3 3.2 4.3 5.1 6.3 7.4 8.3 9.2 10.3 11.1 12.4 13.2 14.3 15.2 16.1 17.2

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