Sporopollenin is chemically

• homopolysaccharide

• fatty substance

• protein

• heteropolysaccharide

272.

During replication of DNA, Okazaki fragments are formed in the direction of

• 3' ➔ 5'

• 5' ➔ 3'

• 5'➔5'

• 3' ➔ 3'

If you want to develop hybrid seeds within a bisexual flower, the following part needs to be removed from the same flower

• stigma

• ovary

• anther

• oviduct

Xenogamy is essentially a type of

• cleistogamy

• allogamy

• autogamy

• homogamy

Megasporangium is equivalent to

• embryo sac

• fruit

• nucellus

• ovule

Seed coat is not thin, membranous in

• maize

• coconut

• groundnut

• gram

Which one of the following statement is correct?

• Hard outer layer of pollen is called intine

• Sporogenous tissue is haploid

• Endothecium produces the microspores

• Tapetum nourishes the developing pollen

Advantage of cleistogamy is

• higher genetic variability

• more vigorous offspring

• no dependence on pollinators

• vivipary

Monoecious plant of Chara shows occurrence of

• antheridiophore and archegoniophore on the same plant

• stamen and carpel on the same plant

• upper antheridium and lower oogonium on the same plant

• upper oogonium and lower antheridium on the same plant

Perisperm differs from endosperm in

• being a haploid tissue

• having no reserve food

• being a diploid tissue

• its formation by fusion of secondary nucleus with several sperms