The arrangement of the nuclei in a normal embryo sac in the dicot plants is

• 2+4+2

• 3+2+3

• 2+3+3

• 2+3+3

An enzyme that can stimulate germination of barley seeds is

• α-amylase

• lipase

• protease

• protease

In a cereal grain the single cotyledon of embryo is represented by

• coleorhiza

• scutellum

• prophyll

• prophyll

Double fertilization is exhibited by

• Gymnosperms

• Algae

• Fungi

• Fungi

Attractants and rewards are required for

• Anemophily

• Entomophily

• Hydrophily

• Hydrophily

A dioecious flowering plant prevents both:

• Autogamy and xenogamy

• Autogamy and geitonogamy

• Geitonogamy and xenogamy

• Geitonogamy and xenogamy

67.

Coconut fruit is a

• Drupe

• Berry

• Nut

• Nut

Functional megaspore in an angiosperm develops into

• Ovule

• Endosperm

• Embryo sac

• Embryo sac

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by

• Water

• Bee

• Wind

• Wind

Double fertilization is

• Fusion of two male gametes of a pollen tube with two different eggs

• Fusion of one male gamete with two polar nuclei

• Syngamy and triple fusion

• Fusion of two male gametes with one egg