Human beings belong to the class:
a. chordata
b. primate
c. mammailia
d. homo
Ans: c. mammailia
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Uric acid produced by insect Malphigian tubules does not influence the movement of water from the hindgut because:
A. it is eliminated by the tubules before water reaches the hindgut. B. it precipitates due to the low pH of the fluid in the rectum and therefore does not contribute to osmotic pressure. C. water moves only in response to the osmotic pressure created by proteins and sugars in the hindgut. D. uric acid is equally concentrated in the hindgut and in the body fluids. E. None of these choices are correct.
Flimmer filaments
A. function to move cells on solid surfaces. B. are components of all eukaryotic flagella. C. permit flagella to pull rather than push the cell. D. None of the choices are correct.
Each of the following are denaturing agents except ________.
A. high pH B. high temperature C. low pH D. low temperature
_____ are hot spots for the evolution of antibiotic-resistant bacteria and their spread to humans due to excessive use of
antibiotics.
a. Hospitals b. Laboratories c. Farms d. Doctor’s offices e. Landfills