Sexual Reproduction in Flowering Plants · Question 19

In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are :

1. Antipodals, synergids, and primary endosperm nucleus
2. Synergids, Zygote and Primary endosperm nucleus
3. Synergids, antipodals and Polar nuclei
4. Synergids, Primary endosperm nucleus and zygote

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

Identify the incorrect statement related to Pollination:

1. Pollination by water is quite rare in flowering plants
2. Pollination by wind is more common amongst abiotic pollination
3. Flowers produce foul odours to attract flies and beetles to get pollinated
4. Moths and butterflies are the most dominant pollinating agents among insects

Which part of the fruit, labelled in the given figure makes it a false fruit? [Figure]

1. A Mesocarp
2. B Endocarp
3. C Thalamus
4. D Seed

The residual persistent part which forms the perisperm in the seeds of beet is

1. Integument
2. Calyx
3. Endosperm
4. Nucellus

To ensure that only the desired pollens fall on the stigma in artificial hybridization process Choose the correct answer from the options given below

1. A, D and E only
2. A, B and C only
3. B, C and D only
4. B, C and E only

In general the egg apparatus of embryo sac in angiosperm consists of

1. One egg cell, two synergids, two antipodal cells, two Polar nuclei
2. One egg cell, two synergids, three antipodal cells, two Polar nuclei
3. One egg cell, two synergids, two antipodal cells, three Polar nuclei
4. One egg cell, three synergids, two antipodal cells, two Polar nuclei

Which of the following can be expected if scientists succeed in introducing apomictic gene into hybrid varieties of crops?

1. There will be segregation of the desired characters only in the progeny
2. Polyembryony will be seen and each seed will produce many plantlets
3. Seeds of hybrid plants will show longer dormancy
4. Farmers can keep on using the seeds produced by the hybrids to raise new crop year after year

The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is :

1. Cleistogamy
2. Xenogamy
3. Geitonogamy
4. Chasmogamy

A typical angiosperm embryo sac at maturity is :

1. 8-nucleate and 8-celled
2. 8-nucleate and 7-celled
3. 7-nucleate and 8-celled
4. 7-nucleate and 7-celled