The part of an eye which acts like a diaphragm of a photographic camera is
pupil
iris
lens
cornea
B.
iris
The iris of the eye is the thin, circular structure made of connective tissue and muscle that surrounds the pupil. The color of our eyes is determined by the amount of pigment in the iris apart from this the iris acts like the diaphragm of a camera and controls the size of the pupil. One muscle within the iris constricts the pupil in bright light (full sunlight, for example), and another iris muscle dilates (enlarges) the pupil in dim lighting and in the dark.
The crystal of lead zirconate is a key component of
sonography
electrocardiography
electroencephalography
magnetoencephalography
'Climacteric' is
a phenomenon related to fruit ripening
the condition of a plant when all its fruits are almost ripe
the condition of a plant when most of its leaves have turned yellow
none of the above
The dendrite carries impulses
towards the cyton
away from cyton
across the body
from one neuron to another
Antibiotic flavicin is obtained from
Aspergillus flavus
Aspergillus clavatum
Streptomyces grieseus
Streptomyces fradiae
Cochlea of mammalian internal ear is concerned with
hearing
balance of body posture
both (a) and (b)
perception changes of atmospheric pressure
Cerebrospinal fluid is present
beneath the pia mater
between piamater and arachnoid
between arachnoid and duramater
between duramater and cranium
