'Adaptation' of eyes in dark is due to
depletionof vision pigment in rods
depletion of vision pigment in cones
repletion of vision pigment in rods
repletion of vision pigment in cones
C.
repletion of vision pigment in rods
Two types of photoreceptor cells are present in retina, ie, rods and cones.
(i) Rods : These cells are active in dark rhodopsin, a vision pigment is present in rods. In strong light, rhodopsin is bleached due to splitting of its two components, ie, scotopsin and retinal.
(ii) Cones : These cells are active in strong light. Iodopsin a pigment is present in cones. These cells produce hare coloured image in bright light.
The blood of cockroach contains no respiratory pigment. It means that
respiration is anaerobic
cockroach does not respire
oxygen goes directly into tissues by diffusion
oxygen goes into tissue by intracellular capillary system
Which part of an animal virus is not reproduced in multiple copies?
Capsid
Protein
Envelope
Ribosome
Which of the following vitamins is water soluble as well as an antioxidant?
Vitamin- B1
Vitamin-A
Vitamin-D
Vitamin-C
Follicle Stimulating Hormone is secreted by
anterior lobe of pituitary
hypothalamus
gonads
poterior lobe of pituitary
