Which one of the following statements is correct?

1. Sporogenous tissue is haploid

2. Endothecium produces the microspores

3. Tapetum nourishes the developing pollen

4. Hard outer layer of pollen is called intine

Both, autogamy and geitonogamy are prevented in:

1. Papaya

2. Cucumber

3. Castor

4. Maize

The gynoecium consists of many free pistils in flowers of:

Even in the absence of pollinating agents, seed-setting is assured in:

1. Commelina

2. Zostera

3. Salvia

4. Fig

The coconut water and the edible part of coconut are equivalent to:

1. Endosperm

2. Endocarp

3. Mesocarp

4. Embryo

Apomictic embryos in Citrus arise from:

1. synergids

2. maternal sporophytic tissue in ovule

3. antipodal cells

4. diploid egg