‘Red tide’ is caused by

 

1.  Gonyaulax
2.  Ceratium
3.  Triceratium
4.  All of these

1.  too much CO2 in the blood
2.  too much O2 in the blood
3.  very little CO2 in the blood
4.  both high O2 and very little CO2 in the blood

1.  daily phase cycle
2.  circadian rhythms
3.  biological clock
4.  photoperiodism

1.  Loop of Henle
2.  distal tubule
3.  Bowman’s capsule
4.  collecting tubule

1.  formation of lactic acid
2.  complete oxidation of food
3.  partial oxidation of food
4.  evolution of CO2 and alcohol

1.  Four pairs of spermathecae in 4-7 segments
2.  One pair of ovaries attached at intersegmental septum of 14th and 15th segments
3.  Two pairs of testes in 10th and 11th segments
4.  Two pairs of accessory glands in 16-18th segments

1.  florigen
2.  vernalin
3.  florigen and venalin
4.  auxin

1.  Rhizopus
2.  Bacterium
3.  Cycas
4.  Ricinus

1.  Cannabis compounds
2.  LSD
3.  cocaine
4.  amphetamines