341971
Match the columns I and II. Column I Column II A Pollen bank P \(\left( { - {{196}^o}C} \right)\) B Generative cell Q Abudant food reserve C Vegetative cell R Spindle shaped cell D Parthenium S Carrot grass
1 A – R, B – P, C – Q, D – S
2 A – Q, B – R, C – P, D – S
3 A – P, B – R, C – Q, D – S
4 A – Q, B – P, C – R, D – S
Explanation:
A – P, B – R, C – Q, D – S
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341972
Number of meiotic divisions required to obtain 200 microspores
1 25
2 50
3 100
4 200
Explanation:
One microspore mother cell undergoes meiosis to give rise to 4 microspores, so to produce 200 microspores 50 meiotic divisions will be required.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341973
The number of pollen grains, produced by each head inflorescence of family Asteraceae having 10 actinomorphic flowers (if each anther produces 20 pollen grains), are
1 500
2 300
3 1000
4 800
Explanation:
Each flower has 5 Anthers and therefore there are 50 Anthers, each anther produces 20 pollen grains. So total pollen grain will be\(10 \times 5 \times 20 = 1000\)
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341974
Pollen grain exine has prominent apertures called _______and it helps in the movement of __________ through the exine
1 Stomata, pollen tubes
2 Micropores, pollen tube
3 Germ spores, pollen tube
4 Germ pores, pollen tube
Explanation:
Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent and it helps in the movement of pollen tube through the exine.
341971
Match the columns I and II. Column I Column II A Pollen bank P \(\left( { - {{196}^o}C} \right)\) B Generative cell Q Abudant food reserve C Vegetative cell R Spindle shaped cell D Parthenium S Carrot grass
1 A – R, B – P, C – Q, D – S
2 A – Q, B – R, C – P, D – S
3 A – P, B – R, C – Q, D – S
4 A – Q, B – P, C – R, D – S
Explanation:
A – P, B – R, C – Q, D – S
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341972
Number of meiotic divisions required to obtain 200 microspores
1 25
2 50
3 100
4 200
Explanation:
One microspore mother cell undergoes meiosis to give rise to 4 microspores, so to produce 200 microspores 50 meiotic divisions will be required.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341973
The number of pollen grains, produced by each head inflorescence of family Asteraceae having 10 actinomorphic flowers (if each anther produces 20 pollen grains), are
1 500
2 300
3 1000
4 800
Explanation:
Each flower has 5 Anthers and therefore there are 50 Anthers, each anther produces 20 pollen grains. So total pollen grain will be\(10 \times 5 \times 20 = 1000\)
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341974
Pollen grain exine has prominent apertures called _______and it helps in the movement of __________ through the exine
1 Stomata, pollen tubes
2 Micropores, pollen tube
3 Germ spores, pollen tube
4 Germ pores, pollen tube
Explanation:
Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent and it helps in the movement of pollen tube through the exine.
341971
Match the columns I and II. Column I Column II A Pollen bank P \(\left( { - {{196}^o}C} \right)\) B Generative cell Q Abudant food reserve C Vegetative cell R Spindle shaped cell D Parthenium S Carrot grass
1 A – R, B – P, C – Q, D – S
2 A – Q, B – R, C – P, D – S
3 A – P, B – R, C – Q, D – S
4 A – Q, B – P, C – R, D – S
Explanation:
A – P, B – R, C – Q, D – S
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341972
Number of meiotic divisions required to obtain 200 microspores
1 25
2 50
3 100
4 200
Explanation:
One microspore mother cell undergoes meiosis to give rise to 4 microspores, so to produce 200 microspores 50 meiotic divisions will be required.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341973
The number of pollen grains, produced by each head inflorescence of family Asteraceae having 10 actinomorphic flowers (if each anther produces 20 pollen grains), are
1 500
2 300
3 1000
4 800
Explanation:
Each flower has 5 Anthers and therefore there are 50 Anthers, each anther produces 20 pollen grains. So total pollen grain will be\(10 \times 5 \times 20 = 1000\)
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341974
Pollen grain exine has prominent apertures called _______and it helps in the movement of __________ through the exine
1 Stomata, pollen tubes
2 Micropores, pollen tube
3 Germ spores, pollen tube
4 Germ pores, pollen tube
Explanation:
Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent and it helps in the movement of pollen tube through the exine.
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BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341971
Match the columns I and II. Column I Column II A Pollen bank P \(\left( { - {{196}^o}C} \right)\) B Generative cell Q Abudant food reserve C Vegetative cell R Spindle shaped cell D Parthenium S Carrot grass
1 A – R, B – P, C – Q, D – S
2 A – Q, B – R, C – P, D – S
3 A – P, B – R, C – Q, D – S
4 A – Q, B – P, C – R, D – S
Explanation:
A – P, B – R, C – Q, D – S
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341972
Number of meiotic divisions required to obtain 200 microspores
1 25
2 50
3 100
4 200
Explanation:
One microspore mother cell undergoes meiosis to give rise to 4 microspores, so to produce 200 microspores 50 meiotic divisions will be required.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341973
The number of pollen grains, produced by each head inflorescence of family Asteraceae having 10 actinomorphic flowers (if each anther produces 20 pollen grains), are
1 500
2 300
3 1000
4 800
Explanation:
Each flower has 5 Anthers and therefore there are 50 Anthers, each anther produces 20 pollen grains. So total pollen grain will be\(10 \times 5 \times 20 = 1000\)
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341974
Pollen grain exine has prominent apertures called _______and it helps in the movement of __________ through the exine
1 Stomata, pollen tubes
2 Micropores, pollen tube
3 Germ spores, pollen tube
4 Germ pores, pollen tube
Explanation:
Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent and it helps in the movement of pollen tube through the exine.
