Discuss the term- ( i) Vernalization (ii) Senescence (iii) Phytochrome (iv) Hypogeal germination.

Define the terms (i) Crystalline solids (ii) Frenkel defects (iii) n-type semi-conductors.

Seminal plasma, the fluid part of semen, is contributed by (i) seminal vesicle (ii) prostate (iii) urethra (iv) bulbourethral gland

Define the terms (i) F-centres (ii) n-type semi-conductors (iii) Ferrimagnetism.

Flame cells of flatworms help in (i) Osmoregulation (ii) Digestion (iii) Reproducation (iv) Excretion (v) Biouminesence

Which of these interactions has negative effets? (i) predation (ii) mutualism (iii) commensalism (iv) parasitism

Explain briefly the following term with suitable example :- (i) protonema (ii) antheridium (iii) archegonium (iv) diplontic (v) sporophyll (vi) isogamy

Name the source glands of the following hormones. (i) TSH (ii) Secretin (iii) Gastrin (iv) Cholesystokinin

Discuss the characteristic properties of the transition elements with special reference to : (i) enthalpy of atomisation, (ii) variable oxidation state, (iii) formation of complex compounds, (iv) formation of coloured ions.

Write brief notes on (i) Amensalism (ii) Parasitism (iii) Symbiosis (iv) Commensatism.

Define (i) Natality, (ii) Mortality, (iii) Population density, (iv) Sex ratio, (v) Immigration.