Comparative genome studies show that humans and _____________________ shared a common ancestor
approximately 5.4 to 6.3 million years ago. Fill in the blank(s) with the appropriate word(s).
chimpanzees
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An organism classified as a eukaryote could be which of the following?
A. a photoautotroph or a photoheterotroph B. a chemoheterotroph or a photoautotroph C. a photoheterotroph or a chemoheterotroph D. a chemoautotroph or a chemoheterotroph
During a particular period of physiological crisis, imagine that your carbon dioxide levels increase sharply, and consequently your blood pH decreases. Predict what will happen to the affinity of your hemoglobin for oxygen in this situation.
A. The affinity for oxygen by hemoglobin will increase. B. The affinity for oxygen by hemoglobin is constant-it does not change. C. The affinity for oxygen by hemoglobin will decrease.
If placed in tap water, an animal cell will undergo lysis, whereas a plant cell will not. What accounts for this difference?
A) expulsion of water by the plant cell's central vacuole B) the relative impermeability of the plant cell membrane to water C) the relative impermeability of the plant cell wall to water D) the relative inelasticity and strength of the plant cell wall
In human blood types, the alleles for A and B are said to be ________ because they are both expressed equally if present in an individual
Fill in the blank(s) with correct word