How do fossils provide evidence of evolutionary history?
A. Fossils provide an accurate account of the
number of species that exist at any particular
time.
B. Older fossils are an excellent source of
DNA from which we can construct molecular
phylogenies.
C. Fossils provide a record of extinct species.
D. Fossils provide complete information on
extinct species.
C
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How are the tails and heads of membrane phospholipids oriented in their environment?
A. The hydrophobic heads are oriented towards each other and the hydrophillic tails are oriented towards the extracellular fluid and the intracellular fluid. B. The hydrophillic tails are oriented towards each other and the hydrophobic heads are oriented towards the extracellular fluid and the intracellular fluid. C. The hydrophobic tails are oriented towards each other and the hydrophillic heads are oriented towards the extracellular fluid and the intracellular fluid. D. The hydrophillic heads are oriented towards each other and the hydrophobic tails are oriented towards the extracellular fluid and the intracellular fluid.
The products of the Krebs cycle include
A) ATP only. B) carbon dioxide and energy carriers only. C) carbon dioxide only. D) energy carriers only. E) ATP, carbon dioxide, and energy carriers.
How do ascomycetes differ from glomeromycetes?
What will be an ideal response?
In order for a eukaryotic gene to be engineered into a bacterial colony to be expressed, what must be included in addition to the coding exons of the gene?
A. eukaryotic tRNAs B. a bacterial promoter sequence C. the introns D. eukaryotic ribosomal subunits E. eukaryotic polymerases