What external changes are visible after the last moult of a cockroach nymph?
Mandibles become harder
Anal cerci develop
Both fore wings and hind wings develop
Labium develops
C.
Both fore wings and hind wings develop
In cockroach, development is paurometabolous. The nymph grows by moulting about 13 times to reach the adult form. The next to last nymphal stage has wing pads but only adult cockroaches have wings. Anal cerci are a pair of jointed filamentous structures in 10th segment of both sexes. Labium is a lover lip and a pair of mandibles are present in mouthparts of cockroach.
Which group of animals belong to the same phylum?
Malarial parasite, Amoeba, mosquito
Earthworm, pinworm, tapeworm
Prawn, scorpion, Locusta
Sponge, sea anemone, starfish
Which of the following are correctly matched with respect to their taxonomic classification?
Flying fish, cuttlefish, silverfish - Pisces
Centipede, millipede, spider, scorpion - Insecta
House fly, butterfly, tse-tse fly, silverfish - Insecta
Spiny anteater, sea urchin, sea cucumber - Echinodermata
Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins?
Glucose-6-phosphate
Fructose 1, 6-bisphosphate
Pyruvic acid
Acetyl Co-A
Which of the following are likely to be present in deep sea water?
Archaebacteria
Eubacteria
Blue-green algae
Saprophytic fungi
Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?
Bacteria - Lysozyme
Plant cells - Cellulase
Algae - Methylase
Fungi - Chitinase
The H-zone in the skeletal muscle fibre is due to
the absence of myofibrils in the central portion of A-band
the central gap between myosin filaments in the A-band
the central gap between actin filaments extending through myosin filaments in the A-band
extension of myosin filaments in the central portion of the A-band
