Some flatworms feed on termites, but are not always successful. Which of the following procedures do they use to solve this problem?
a. They position themselves to chemically attract termites and use their head with mucus and suction to capture termites.
b. They position themselves to visually attract termites and use their head with mucus and suction to capture termites.
c. They position themselves to visually attract termites and use their whole body with mucus and suction to capture termites.
d. They position themselves to chemically attract termites and use their whole body with mucus and suction to capture termites.
Ans: b. They position themselves to visually attract termites and use their head with mucus and suction to capture termites.
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At night, assuming no artificial lights, primarily ____
a. Pr absorbs red light and is converted to Pfr b. Pr absorbs far-red light and is converted to Pfr c. Pfr absorbs red light and is converted to Pr d. Pfr absorbs far-red light and is converted to Pr e. Pfr is converted to Pr
Many forest plants and animals have been found to have chemicals in them that can be used for medicines. Which of the following is least helpful in preserving this resource?
A) encouraging paper and wood recycling B) limiting new housing developments C) promoting nut tree growing D) eating more hamburgers
The former kingdom Prokaryotae has been divided into two (domains/phyla/classes) in the current taxonomy.
Fill in the blank(s) with the appropriate word(s).
How can you tell the difference between the sound of a tuba and that of a flute?
A. Each part of the spiral organ is sensitive to different wave frequencies. B. Lower pitches activate all three bones of the middle ear, while higher pitches only activate one or two. C. The cochlear nerve fires more frequently for higher pitches and less frequently for lower pitches. D. The brain interprets pitches based on the strength of the sound waves. E. Lower pitches cause the tympanic membrane to vibrate, while higher pitches vibrate the vestibular canal.