The ______ prevents food/drink from entering the respiratory tract.
a) sphincter
b) trachea
c) larynx
d) epiglottis
Ans: d) epiglottis
Biology & Microbiology
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The osmoregulatory and ionoregulatory problems facing a freshwater fish are
A. loss of water and loss of ions. B. loss of water and gain of ions. C. gain of water and loss of ions. D. gain of water and gain of ions. E. loss of urine and gain of ions.
Biology & Microbiology
An adaptation in one environment may be useless or harmful in different circulstances.
a. true b. false
Biology & Microbiology
The main role of the liver is to ________
A) absorb nutrients B) absorb water C) produce bile, which helps the process of digestion D) break large food into smaller food bits
Biology & Microbiology
Mitochondrial and chloroplast proteins are synthesized on
a. ER ribosomes. b. free cytosolic ribosomes. c. organellar ribosomes. d. Both b and c
Biology & Microbiology