Which one of the followings in birds, indicates their reptilian ancestry?

• Scales on their hind limbs

• Four chambered heart

• Two special chambers crop and gizzard in their digestive tract

Endosperm is consumed by developing embryo in the seed of 

• coconut

• castor

• pea

• pea

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

• lignified thick walls

• cohesion and adhesion

• weak gravitational pull

• weak gravitational pull

The blood calcium level is lowered by the deficiency of 

• parathormone

• thyroxine

• calcitonin

• calcitonin

Which one of the following is heterosporous? 

• Dryopteris 

• Salvinia

• Adiantum

• Adiantum

Dry indehiscent single-seeded fruit formed from bicarpellary syncarpous inferior ovary is 

• Caryopsis

• cypsela

• Adiantum

• Adiantum

The fleshy receptacle of  syconus of fig encloses a number of 

• achenes

• samaras

• berries

• berries

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

• Bacterial leaf blight of rice

• Downy mildew of grapes

• Loose smut of wheat

• Loose smut of wheat

The length of different internodes in a culm of sugarcane is variable because of

• shoot apical meristem

• position of axillary buds

• size of leaf lamina at the node below each internode

• size of leaf lamina at the node below each internode

20.

Which one of the following is the correct difference between rod cells and cone cells of our retina? 

• Features	Rod cells	Cone cells
  Visual acuity	High	Low

• Features	Rod cells	Cone cells
  Visual Pigment contained	Iodeosin	Rhodopsin

• Features	Rod cells	Cone cells
  Overall function	Vision in poor light	Colour vision and detailed vision in bright light

• Features	Rod cells	Cone cells
  Overall function	Vision in poor light	Colour vision and detailed vision in bright light