In a typical dicotyledonous embryo, the cylindrical portion below the level of cotyledons is _________ that terminates at its lower and in the ____________

1. Epicotyl, plumule

2. Epicotyl, radicle

3. Hypocotyl, radicle

4. Hypocotyl, plumule

Pollination by water is

1. Limited to about 30 families of dicots

2. Very common in  flowering plants

3. More common in monocots than dicots

4. More common abiotic method of pollination

The lower end of the embryonal axis in maize has the radicle and root cap enclosed in

1. An extension of scutellum

2. A structure called coleoptile

3. A differentiated sheath

4. A structure called coleorrhiza

Mark the incorrect statement

1. Hybrid seeds have to be produced every year

2. Production of hybrid seeds is costly

3. If the seeds collected from hybrids are sown, the progeny do not maintain hybrid characters

4. Cultivation of hybrids has decreased productivity

Male and female plants are not separate in case of

1. Papaya and date-palm

2. Mulberry and papaya

3. Date-palm and mulberry

4. Castor and maize

In Polygonum type of embryo sac, polar nuclei

1. Are haploid

2. Can serve as a precursor of PEN

3. Occur in the large central cell

4. More than one option is correct

Endosperm development precedes embryo development because

1. It is  a product of triple fusiony

2. It provides nutrition to developing embryo

3. It is larger than embryo

4. Its development mostly occurs by free nuclear division in PEN

Viability of seeds

1. Maybe lost within a few months

2. Is 1000 years in Lupinus arcticus

3. Recorded in Phoenix is 10000 years

4. Can be tested by 0.1% solution of TTC

Pollen grains lose viability within 30 minutes of their release in the members of family

1. Rosaceae

2. Solanaceae

3. Poaceae

4. Leguminosae

Endosperm persists in the mature seeds of

1. Pea

2. Groundnut

3. Gram

4. Maize