Which of the following are most likely to have teeth adapted for grinding and/or tearing?
A) suspension feeders
B) mass feeders
C) deposit feeders
D) fluid feeders
Answer: B
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What processes are included in the treatment of wastewater in industrial plants of developed countries?
A) removing excess nutrients, such as phosphates and nitrates B) removing semisolid wastes C) discharging untreated wastewater into waterways D) burning semisolid wastes for energy
What makes certain red algae appear red?
A) They live in warm coastal waters. B) They possess pigments (phycoerythrin) which reflects and transmits red light. C) They use red light for photosynthesis. D) They lack chlorophyll. E) They contain the water-soluble pigment anthocyanin.
Plants that are exactly alike genetically are
A. homozygous. B. mutants. C. clones. D. highly genetically diverse.
The total number of existing cases of disease within a defined population is the _________.
A) incidence B) prevalence