Ribozymes
A. are complexes of ribosomes and RNA.
B. are self-catalytic RNA.
C. suggest that nucleic acids evolved before proteins.
D. are enzymes that degrade RNA and therefore have potential for clinical applications.
E. are self-catalytic RNA AND suggest that nucleic acids evolved before proteins.
E
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A life cycle that regularly alternates between haploid and diploid stages is found in all of the following EXCEPT
A. dogs B. the bacterium E. coli C. alfalfa plants D. the mold N. crassa
Sea cucumbers and sedentary annelid worms share all but which in common?
a. both can be deposit feeders. b. both have oral structures to collect detritus. c. similar body segmentation. d. digestive tract is a straight tube
Which of the following is a class of molecules that encompasses all of the other molecules listed?
a. triglycerides d. steroids b. fatty acids e. lipids c. waxes f. phospholipids
Which of the studies below provide evidence linking genes and behavior? (Check all that apply)A) Fruit flies that are mutant for the genes dunce or rutabaga have impaired learning.B) Mice that are lacking either the ephrinB3 or the EphA4 gene cannot walk normally, but instead hop like a kangaroo.C) Two lines of fruit flies were created by repeatedly selecting for high or low aggressive behavior. After multiple generations, the high line was reliably more aggressive than the low line.D) Twin studies comparing monozygotic and dizygotic twins have found a high heritability for height, although environmental influences like nutrition also play a role.
What will be an ideal response?