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161.

If a dihybrid without genic interaction is selfed the following ratio is obtained in F2:

A.	1:1:1:1	B.	9:3:3:1
C.	9;7	D.	9;6;1

162.

If a membrane allows the passage of both solvent and solute molecules it is said to be:

A.	Non-permeable	B.	Impermeable
C.	Semi-Permeable	D.	Permeable

163.

If dissolved sugar in pure water the resulting solution will have osmotic potential than that of pure water:

A.	Equal	B.	More positive
C.	More negative	D.	Difficult to measure

164.

If more solute is added to a saturated solution, it settles down but if heated the excess amount also gets dissolved. Such a solution said to be:

A.	Unsaturated	B.	Saturated
C.	Super saturated	D.	Crystalloid

165.

If parents differ in ten gene pairs, no selection is done; six back crosses will produce a population having ______ per cent homozygous and identical individuals to recurrent parent at all ten loci:

A.	65	B.	75
C.	85	D.	95

166.

If the cells of a plant root tip contain chromosomes will be found in its pollen grains?

A.	4	B.	8
C.	16	D.	32

167.

If the particles of dispersed phase have an affinity towards the particles of the dispersion medium the colloidal system is known as:

A.	Lyophobic	B.	Hydrophobic
C.	Lyophilic	D.	None of the above

168.

In ______, pollen dispersal is poor and seed set is likely to be low on male sterile plants:

A.	Tomato	B.	Cauliflower
C.	Broccoli	D.	Carrot

169.

In ______ , the first studies on artificial hybridization for which yields were reported were those of Beal during the period between 1877 and 1882:

A.	Sorghum	B.	Pearlmillet
C.	Maize	D.	Carrot

170.

In Angiosperms:

A.	Sporophyte is complex and gametophyte incospicuous	B.	Sporophyte simple and gametophyte complex
C.	Sporophyte and gemetophyte complex	D.	Sporophyte and gametophyte incospicuous