Masses of pollen grains, i.e., pollinia is found in

• Gramineae

• Solanaceae

• Orchidaceae

• Malvaceae

Morphine, which is used as an analgesic is obtained from

• Taxusbrevifolia

• Berberisnilghiriensis

• Cinchona officinalis

• Pa paver somniferum

Darwin’s finches are an excellent example of

• Adaptive Radiation

• Seasonal migration

• Brood parasitism

• Connecting links

Vascular tissues in flowering plants develop from

• Phellogen

• Plerome

• Periblem

• Dermatogen

A mature pollen grain of Pinus has

• 2 cells

• 3 cells

• 4 cells

• 5 cells

156.

Green potatoes are toxic due to

• Phytoalexins

• Solanin

• Triazine

• Hormones

Which is a useful product of epidermal origin?

• Saffron

• Cotton Fibres

• Clove

• Jute

A monocarpic plant is one, which

• has only one carpel

• Flowers once in a life-time

• Produces only one seed

• Produces only one fruit

The rupture and fractionation do not usually occur in water column in vessel/tracheids during the ascent of sap because of

• Lignified thick walls

• Cohesion and adhesion

• Weak gravitational pull

• Transpiration pull

Viscum album grown on trees. This is an example of

• Symbiosis

• Parasitism

• Commensalism

• Predation