Which one of the following group of animals is homeothermic?
Reptiles
Amphibians
Birds
Fishes
C.
Birds
Birds, humans and other mammals can maintain their body temperature irrespective of external temperature variation, i.e. they are warm blooded (homeothermic) animals. While, all reptiles, insects, amphibians and fishes are cold-blooded (poikilothermic) animals. These animals cannot control their body temperature, i.e. their body temperature varies considerably.
Which one of the following matching pairs is incorrect?
Mollusca - Pseudocoel
Cnidaria - Nematocyst
Annelida - Chloragogen cells
Echinodermata - Water vascular system
An allosteric inhibitor of the enzyme acts by binding to the
substrate
product
catalytic site of the enzyme
non-catalytic site of the enzyme
Necrosis (die-back) ofthe tip of young leaves is caused due to the deficiency of
iron
manganese
zinc
copper
Which one of the following enzymes is responsible for the conversion of norepinephrine to epinephrine?
Catecholamine-O-methyltransferase
Phenylalanine-N-methyltransferase
DOPA decarboxylase
Monoamine oxidase
Nitrogenase enzyme is a
magnesium-iron protein
molybdenum-iron protein
iron-copper protein
nickel-iron protein
Which one of the following matching pairs is incorrect?
Shell fish - Pisces
Silver fish - Arthropoda
Cuttle fish - Mollusca
Star fish - Echinodermata
Guttation is a process of loss of water in
liquid form containing dissolved minerals
liquid form without dissolved minerals
vapour form with minerals
vapour form without minerals
