The eukaryotes first appear in the fossil record
about ____ million years ago.
a. 1.8
b. 2.2
c. 2.7
d. 3.6
e. 1.5
A
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Which kind of sterilization procedure takes advantage of the size of microorganisms?
A. Open flame B. Use of chemicals C. Filtration D. Autoclaving
True or false: The sequence of amino acids in a protein is referred to as its primary structure
A. true B. false
Whales are believed to be products of divergent evolution sharing a common terrestrial ancestor with the modern hippopotamus. One piece of evidence that supports this theory that they were previously terrestrial is the presence of small bones in the tale of the whale believed to be leftovers from a time when whales had hips and lower limbs. What would we call these hips?
a. whale girdles b. homologous structure c. vestigial structures d. archetype features
You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. All of the F1 are pink. What can you say about the alleles for the parental traits?
A. Red and white show incomplete dominance. B. Pink is dominant, whereas red and white are recessive. C. Both red ad white are recessive. D. Red is dominant.