Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Which among the following bears smallest living cell ?
Bacterium
Mycoplasma
Virus
Yeast
Yawning occurs–
due to excess concentration of CO2 in blood
due to excess concentration of CO2 in lungs
due to excess concentration of O2 in lungs
None of these
Which among the following living being has respiratory organ but does not have brain ?
crab
starfish
blood succor
silverfish
Which vitamin helps in blood coagulation?
Vitamin-A
Vitamin-C
Vitamin-K
Vitamin-E
A substance that stimulates the production of antibodies when introduced into a living organism is known as—
carcinogen
androgen
antigen
oestrogen
