Which of the following is responsible for closing off the airway during swallowing?

a. the larynx
b. the epiglottis
c. the pharynx
d. the intercostal muscles


Ans: b. the epiglottis

Biology & Microbiology

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In a typical eudicot seed, most of the nutrients are stored in ____

a. the seed coat b. endosperm c. cotyledons d. coleoptiles e. hypocotyls

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Which of the following is characteristic of REM sleep?

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In a cross between a true-breeding plant bearing smooth, yellow seeds and a true-breeding plant with

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