Is it important to save the wild relatives of our current crop plants, even at great cost?
A. No
B. Yes
Answer: B
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Each cone responds primarily to a single color. What kinds of cones are present in the human retina?
a. Two cones that perceive red or blue light. b. Three cones that perceive red, blue, or green light. c. Three cones that perceive orange, green, or purple light. d. Three cones that perceive red, blue, or yellow light. e. Four cones that perceive red, blue, yellow, or green light.
If the DNA triplets were ATG and CGT, the mRNA codons would be
a. AUG and CGU. b. ATG and CGT. c. UAC and GCA. d. UAG and CGU. e. UAU and GCA.
What type of evidence shows that endocrine disruptors in the water supply can cause human reproductive problems?
A) correlative B) definitive C) statistically significant D) entirely absent
Which cells in the testes secrete testosterone?
a. Sertoli cells b. luteinizing cells c. glycoprotein cells d. interstitial cells e. sperm cells