Stramenopiles are unique in that they possess:
A. calcium carbonate crystals
B. flexible protein ribbons beneath the plasma membrane
C. hairy flagella
D. double plastids
E. alveoli
Answer: C
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Metanephridia differ from protonephridia in all of the following ways except:
A. the urine produced in both systems is more dilute than the body fluids. B. metanephridia are surrounded by an extensive capillary network, whereas protonephridia are not. C. selective reabsorption of materials occurs via cells lining the tubules in protonephridia and via capillaries in metanephridia. D. fluid enters metanephridia through a funnel -shaped opening. E. fluid from the body cavity enters protonephridia without first being filtered.
Which specialized stem structure does not have nodes?
a. bulbs b. stolons c. corms d. tubers e. rhizomes
Lewis had a hereditary disorder that caused his cochlear hair cells to progressively die, beginning with those nearest to the oval window and then on to the rest of the hair cells. What will be the earliest problem noticed?
A) high-frequency deafness B) anosmia C) vertigo D) color blindness
Plants first colonized the land during the Mesozoic Era
a. true b. false