Which of the following can NOT be used to estimate a phylogenetic tree?
A. DNA sequences
B. Homoplasies
C. Fossil records
D. Synapomorphies
Ans: B. Homoplasies
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The backbone of the DNA molecule is formed by ________
A. peptide bonds B. ribose sugars C. nitrogenous bases D. phosphodiester bonds
Methanogens, thermophiles, and halophiles characterize many members of this taxonomic group of microbes
a. Eukarya b. Archea c. Bacteria d. None of the above
Animal groups differ in the mechanisms by which heartbeats are initiated. Most arthropods have a
A. neurogenic heart while vertebrates have a myogenic heart. B. myogenic heart while vertebrates have a neurogenic heart. C. neurogenic heart while vertebrates have a cardiogenic heart. D. cardiogenic heart while vertebrates have a myogenic heart. E. autonomous heart while vertebrates have a neurally controlled heart.
Corn, rice, wheat, fleshy fruits such as apples and berries, and many spices are all produced by
A) gymnosperms. B) ferns. C) angiosperms. D) seedless plants.