341674
The pollen grains mature before the stigma becomes receptive.
1 Herkogamy
2 Protogyny
3 Self incompatibility
4 Protandry
Explanation:
Protandry - The pollen grains mature before the stigma becomes receptive.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341675
In castor and maize plants:
1 Autogamy is prevented but not geitonogamy
2 Both autogamy and geitonogamy are prevented
3 Male and female flowers are borne by different plants
4 The anthers and stigma are placed at different positions to encourage cross pollination
Explanation:
If a plant bears both male and female flowers on the same plant, it is called monoecious (e.g., cucurbits, maize, castor). In such cases, autogamy is prevented but geitonogamy can take place.
KCET - 2014
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341676
Match the columns I and II. Column I Column II A Protogyny P Anther matures first B Protandry Q Mechanical barrier C Herkogamy R Stigma matures first D Self incompatibility. S Genetic mechanism to prevent self pollen
1 A – R, B – P, C – Q, D – S
2 A – S, B – R, C – P, D – Q
3 A – P, B – R, C – Q, D – S
4 A – Q, B – P, C – R , D – S
Explanation:
A – R, B – P, C – Q, D – S
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341677
Dioecy is the mechanism for some plants to
1 Promote autogamy
2 Promote cross pollination
3 Promote Xenogamy
4 Both (2) & (3)
Explanation:
In several species such as papaya, male and female flowers are present on different plants, that is each plant is either male or female (dioecy). This condition prevents both autogamy and geitonogamy.It promotes crosspollination/ xenogamy.
341674
The pollen grains mature before the stigma becomes receptive.
1 Herkogamy
2 Protogyny
3 Self incompatibility
4 Protandry
Explanation:
Protandry - The pollen grains mature before the stigma becomes receptive.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341675
In castor and maize plants:
1 Autogamy is prevented but not geitonogamy
2 Both autogamy and geitonogamy are prevented
3 Male and female flowers are borne by different plants
4 The anthers and stigma are placed at different positions to encourage cross pollination
Explanation:
If a plant bears both male and female flowers on the same plant, it is called monoecious (e.g., cucurbits, maize, castor). In such cases, autogamy is prevented but geitonogamy can take place.
KCET - 2014
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341676
Match the columns I and II. Column I Column II A Protogyny P Anther matures first B Protandry Q Mechanical barrier C Herkogamy R Stigma matures first D Self incompatibility. S Genetic mechanism to prevent self pollen
1 A – R, B – P, C – Q, D – S
2 A – S, B – R, C – P, D – Q
3 A – P, B – R, C – Q, D – S
4 A – Q, B – P, C – R , D – S
Explanation:
A – R, B – P, C – Q, D – S
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341677
Dioecy is the mechanism for some plants to
1 Promote autogamy
2 Promote cross pollination
3 Promote Xenogamy
4 Both (2) & (3)
Explanation:
In several species such as papaya, male and female flowers are present on different plants, that is each plant is either male or female (dioecy). This condition prevents both autogamy and geitonogamy.It promotes crosspollination/ xenogamy.
341674
The pollen grains mature before the stigma becomes receptive.
1 Herkogamy
2 Protogyny
3 Self incompatibility
4 Protandry
Explanation:
Protandry - The pollen grains mature before the stigma becomes receptive.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341675
In castor and maize plants:
1 Autogamy is prevented but not geitonogamy
2 Both autogamy and geitonogamy are prevented
3 Male and female flowers are borne by different plants
4 The anthers and stigma are placed at different positions to encourage cross pollination
Explanation:
If a plant bears both male and female flowers on the same plant, it is called monoecious (e.g., cucurbits, maize, castor). In such cases, autogamy is prevented but geitonogamy can take place.
KCET - 2014
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341676
Match the columns I and II. Column I Column II A Protogyny P Anther matures first B Protandry Q Mechanical barrier C Herkogamy R Stigma matures first D Self incompatibility. S Genetic mechanism to prevent self pollen
1 A – R, B – P, C – Q, D – S
2 A – S, B – R, C – P, D – Q
3 A – P, B – R, C – Q, D – S
4 A – Q, B – P, C – R , D – S
Explanation:
A – R, B – P, C – Q, D – S
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341677
Dioecy is the mechanism for some plants to
1 Promote autogamy
2 Promote cross pollination
3 Promote Xenogamy
4 Both (2) & (3)
Explanation:
In several species such as papaya, male and female flowers are present on different plants, that is each plant is either male or female (dioecy). This condition prevents both autogamy and geitonogamy.It promotes crosspollination/ xenogamy.
341674
The pollen grains mature before the stigma becomes receptive.
1 Herkogamy
2 Protogyny
3 Self incompatibility
4 Protandry
Explanation:
Protandry - The pollen grains mature before the stigma becomes receptive.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341675
In castor and maize plants:
1 Autogamy is prevented but not geitonogamy
2 Both autogamy and geitonogamy are prevented
3 Male and female flowers are borne by different plants
4 The anthers and stigma are placed at different positions to encourage cross pollination
Explanation:
If a plant bears both male and female flowers on the same plant, it is called monoecious (e.g., cucurbits, maize, castor). In such cases, autogamy is prevented but geitonogamy can take place.
KCET - 2014
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341676
Match the columns I and II. Column I Column II A Protogyny P Anther matures first B Protandry Q Mechanical barrier C Herkogamy R Stigma matures first D Self incompatibility. S Genetic mechanism to prevent self pollen
1 A – R, B – P, C – Q, D – S
2 A – S, B – R, C – P, D – Q
3 A – P, B – R, C – Q, D – S
4 A – Q, B – P, C – R , D – S
Explanation:
A – R, B – P, C – Q, D – S
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341677
Dioecy is the mechanism for some plants to
1 Promote autogamy
2 Promote cross pollination
3 Promote Xenogamy
4 Both (2) & (3)
Explanation:
In several species such as papaya, male and female flowers are present on different plants, that is each plant is either male or female (dioecy). This condition prevents both autogamy and geitonogamy.It promotes crosspollination/ xenogamy.
