Solarisation is 

• formation of chlorophyll

• destruction of chlorophyll

• utilisation of sunlight

• effects of solar light

Which is essential for root hair growth?

• Zinc

• Calcium

• Molybdenum

• Sulphur

A fern prothallus is bisexual. If fertilisation takes place between their gametes than it is known as

• cross- fertilisation

• self- fertilisation

• isogamous

• viviparous

Chicory powder which is mixed with coffee powder is obtained from

• root

• leaf

• stem

• seeds

Which of the following is not the feature of gymnosperms?

• parallel venation

• perennial plants

• distinct branches (long and short branches)

• xylem with vessels

In callus culture, roots can be induced by the supply of

• auxin

• cytokinin

• gibberelin

• ethylene

Stem cuttings are commonly used for the proprogation of

• banana

• rose

• mango

• cotton

Edible part in 'sorosis', a composite fruit, is

• cotyledons

• endosperm

• perianth and peduncle

• fleshy thalamus

39.

Which of the following is a true nut?

• Walnut

• Cashewnut

• Groundnut

• Pistachio

Most primitive member, in which roots are not present, is

• Psilotum

• Rhynia

• Lycopodium

• Selaginella