Parasitic worms, even meters-long tapeworms, are studied in microbiology because
A) they are parasites.
B) diagnosis usually involves microscopic examination of patient samples.
C) the Gram stain can be used to identify them.
D) Leeuwenhoek first discovered them.
E) no one else wants to study them.
B
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Our ability to respond to moderate heat and cold is due to
A. mechanoreceptors. B. thermoreceptors. C. nociceptors. D. electromagnetic receptors. E. chemoreceptors.
The outer coat of pollen grains is called sporopollenin, which is made of ________
a. cellulose b. an unknown substance c. protein d. glycolipid
Which of the following animals undergoes true holoblastic cleavage?
A. butterfly B. ant C. snail D. tuna E. bird
The Calvin cycle can only produce sugar if ______ can enter through the pores of the leaves.
A. water B. O2 C. CO2 D. N2 E. potassium