MCQ
Mark the vitamin present in Rhodopsin:
- AVit A.
- BVit B.
- CVit C.
- DVit D.
Explanation:
The rods contain a purplish red protein called the rhodopsin. It is a photosensitive compound in eye that is composed of opsin (a protein) and retinal (an aldehyde of vitamin-A), whereas vitamin-B, C and D not directly related with vision.
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$(A)$ Inliverworts,mossesandferns gametophytes are freeliving.
$(B)$ Gymnosperms and some ferns are heterosporous.
$(C)$ Sexual reproduction in Fucus, Volvox andAlbugo is oogamous.
$(D)$ The sporophyte in liverworts is more elaborate than that in mosses.
$(E)$ Both, Pinus and Marchantia are dioecious. How many of the above statements are correct?
$I.$ Stretch receptors on the wall of urinary bladder send signal to the $CNS$
$II.$ The bladder fills with urine and becomes distended
$III.$ Micturition
$IV.$ $CNS$ passes on motor messenger to initiate the contraction smooth muscles of bladder and simultaneous relaxation of urethral sphincter
The correct order of steps for urination is