An expected meiotic pairing configuration in a ________ would be a trivalent
A) monosomic individual
B) diploid
C) triploid
D) trisomic individual
E) monoploid
Answer: C
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The oldest well-documented flowering plant fossils are Archaefructus, dating to about
a. 1.5 billion years ago. b. 420 million years ago. c. 250 million years ago. d. 125 million years ago. e. 17 million years ago.
In nearly all cases, the one-way flow of energy through the biosphere starts with energy input from:
a. aerobic respiration b. the sun c. deoxyribonucleic acid d. ATP
A common source of antibiotics is
A. Acetobacter. B. Aspergillus oryzae and Lactobacillus. C. Lactoccocus cremoris. D. Streptococcus thermophilus. E. Streptomyces.
The figure below shows phenotypic measures for fossils that have been taxonomically classified as belonging to two different species. Which of the following scenarios are possible explanations for the observed pattern?
a. several extinction events (taxonomic classification underestimates number of species) b. one extinction event (taxonomic classification matches the number of species) c. no extinction event (taxonomic classification overestimates the number of species) d. All of the above