Which of the following have rotating shoulder joints, stereoscopic vision, and flattened nails?
a. primates
b. carnivora
c. cetacea
d. edentata
a. primates
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The three steps that take place in each cycle during PCR occur in which order?
A. DNA denaturation, annealing, and synthesis B. DNA annealing, denaturation, and synthesis C. DNA synthesis, denaturation, and annealing D. None of the choices are correct.
Imagine that you are studying a new species. As you examine the circulatory system, you note that the diameter of the vessels grows smaller and smaller as you move farther from the heart, but the blood is always contained within vessels. If you want to place this new species into a group whose membership is solely based on whether the animals included share this described type of circulatory system, which animals would be included in this group? Check all that apply.
A. fish B. housefly C. frogs D. all mollusks
Ecosystems in the United States experience seasonality because:
A) there is a predictable seasonal solar activity cycle. B) the rotation of Earth causes a rhythmic circulation of Earth's atmosphere. C) Earth is closer to the sun in summer and farther away in winter. D) Earth is tilted with respect to the orbit around the sun. E) Earth rotates on it's axis relative to the sun.
One step of the HIV infection process is the T-cell is turned into a duplication mechanism that continues to make copies of the virus.
a. true b. false