Which of the following streptococci is associated with dental caries?
A) viridans streptococci
B) Streptococcus pyogenes
C) Streptococcus pneumoniae
D) Streptococcus equisimilis
E) Streptococcus arginosus
A
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Most members of the subphylum ______ are carnivorous and have an open circulatory system in which blood is pumped into the hemocoel by a dorsal heart.
a. Chelicerata b. Hexapoda c. Myriapoda d. Crustacea
Which of the following nitrogenous waste products is secreted by organisms that live in water and have body surfaces in direct contact with water?
A. urea B. uric acid C. ammonia D. All of the answers are correct. E. No answer is correct.
During the final events of cellular respiration, oxygen combines with ________ to form ________
A) energy-depleted electrons and carbon; CO2 B) carbon only; CO2 C) hydrogen ions only; water D) energy-depleted electrons and hydrogen ions; water E) energy-depleted electrons only; water
Why are most plants green?
A) Chlorophyll a reflects green light. B) Chlorophyll a absorbs green light. C) Chlorophyll b primarily uses green light as the source of energy for photosynthesis. D) Green helps plants blend into their environment as a sort of camouflage.