A marine biologist wishes to test the hypothesis that heavy grazing by snails causes the alga Ulva to stay short rather than grow upright. Which of the following variables could be manipulated successfully at the seashore to test this hypothesis?
A) Add nutrients to the nearby ocean waters to see if the algae grow taller
B) Put a small cage around the algae to keep snails from eating them and then see if the protected algae are taller than unprotected ones
C) Change the light intensity to see if this causes the algae to stay short
D) Redirect ocean waves to see if wave shock causes the algae to stay short
B) Put a small cage around the algae to keep snails from eating them and then see if the protected algae are taller than unprotected ones
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The ________ allows for flexibility in the codon:anticodon interaction at the third position.
Fill in the blank(s) with the appropriate word(s).
The type of contraception that works because
ovulation is prevented is a. the rhythm method. b. tubal ligation. c. birth control pills. d. a diaphragm. e. a condom.
The behavioral response tested using the models in Figure 51-1 is:
a. classical conditioning. b. habituation. c. imprinting. d. insight. e. a sign stimulus
The study of algae is referred to as ________.
A. mycology B. phytology C. phycology D. None of the choices are correct.