You want to obtain the strongest phototropic response from a shoot. Which wavelength of light should you use?
a. less than 500 nm
b. 660 nm
c. 730 nm
d. 800 nm
e. more than 800 nm
ANSWER: a
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If an organism has two copies of each chromosome, it is
A. aneuploidy. B. diploid. C. haploid. D. tetraploid. E. polyploidy.
"Vertebrates" refers to animals that possess
a. hair. b. mammary glands. c. the ability to give birth to live young. d. lungs. e. a backbone.
The relation between the variation in a phenotypic trait and the variation in an environmental variable?in other words, the pattern of phenotypic plasticity in a trait?is called a ________. [two words]
Fill in the blank(s) with correct word
Which of the following is the cause of goiter in a patient with hypothyroidism?
a. depressed levels of PTH b. depressed levels of calcitonin c. elevated levels of TSH d. elevated levels of iodine e. elevated levels of thyroxine