MCQ
Larynx open into pharynx by:
- AGullet
- BGlottis
- CEpiglottis
- DNone of the above
Explanation:
The lowest part of pharynx is the laryngopharynx. It has two apertures, the anterior slit is 'glottis', through which it opens into the larynx and the posterior slit is 'gullet', which leads to the oesophagus.
Thus, larynx opens into the pharynx by glottis. The glottis bear a leaf-like a cartilaginous flap, called the 'epiglottis'. Epiglottis cover the glottis during swallowing, to prevent the entry of food into it.
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$a\ \ b\ \ c\ \ d$
$a -$ Nuclear envelope assembles around chromosomes clusters.
$b -$ Spindle fibers attach to kinetochores of chromosomes.
$c-$ Condensation of chromosomes.
$d -$ Centromeres split and chromatids separate.