A cat strolls across your backyard. An hour later, a dog with its nose to the ground follows the trail of the cat. Explain what is going on from a molecular point of view.
A. The cat is leading the dog into a trap.
B. The dog is smelling molecules from the cat.
C. The dog is following the areas of increased density of the Earth.
D. The dog is smelling atoms from the cat.
Answer: B
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In eukaryotes which of the following is true?
A) Transcription never occurs in the nucleus. B) Translation always occurs in the nucleus. C) Translation sometimes occurs in the nucleus. D) Translation never occurs in the nucleus.
Which of the following is not a typical stage in the evolution of a Basin and Range type region?
A) Water erodes the mountains and deposits sediment in the adjacent basins. B) Sediment slowly moves downhill to the sea where it is ultimately deposited. C) Alluvial fans and bajadas form along the mountain fronts. D) Salt flats or playas and occasional playa lakes form.
Streams preferentially erode ________ and ________ valleys where rock is most easily eroded
A) deep, wide B) deep, narrow C) shallow, wide D) shallow, narrow
The major export from the Middle East is
A) energy. B) textiles. C) manufactured goods. D) agricultural products. E) computer software.