Which one of the followings is the functional unit of hearing?
Utricle
Organ of Zuckerkandl
Organ of Corti
Vestibular apparatus
C.
Organ of Corti
The organ of Corti is the functional unit of hearing and contains the sound receptors that convert mechanical vibration into nerve impulses. It contains the receptors that transform mechanical vibrations into nerve impulses. These are located in the basilar membrane of the organ of corti thus making it the functional unit of hearing.
Which one of the following statements is incorrect?
Insects have one pair of antenna
Millipeds possess two pairs of appendages in each segment of the body
Prawns have two pairs of antenna
Animals belonging to the phylum- Porifera have nematocys
Which of the followings does not occur in the interphase of eukaryotic cell division?
Increase of ATP synthesis
Increase of DNA synthesis
Increase of RNA synthesis
Reduction in cell size
Which one of the followings is not a characteristic feature of mammals?
Diphyodont tooth
Ten pairs of cranial nerves
Seven cervical vertebrae
Left aortic arch in the circulatory system
TCA cycle enzymes are located in
cristae
outer membrane
mitochondrial matrix
mitochondrial intermembrane space
Vernalisation promotes flowering by
low temperature
high temperature
prolonged photoperiod
short photoperiod
Which one of the followings is not a refractive medium of the eye?
Lens
Vitreous humour
Aqueous humour
Pupil
The eukaryotic cells have all of the followings except
peptidoglycan in the cell wall
the 80 S ribosome
nuclear membrane
mitochondria
C4 pathway is advantageous over C3 pathway in plants as it
occurs in relatively low CO2 concentration
uses more amount of water
occurs in relatively low O2 concentration
is less efficient in energy utilisation
