Which of the following would increase the rate of flow in blood vessels?
A. decreasing the length and increasing the
diameter of the blood vessels
B. increasing the length and diameter of the
blood vessels
C. decreasing the length and diameter of the
blood vessels
D. increasing the length and decreasing the
diameter of the blood vessels
E. None of the answer options would
increase flow rates.
A
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Unusually shaped viruses, such as lemon-shaped and spindle-shaped, have recently been discovered in
A) Archaea. B) Bacteria. C) Archaea and Bacteria. D) Eukarya.
An artificial vesicle composed of a lipid bilayer is mixed with several peripheral membrane proteins and analyzed by freeze-fracture electron microscopy. What will be seen in the resulting image?
A. bumps will be visible on both layers B. bumps will be visible only in the extracellular face (E face) C. bumps will be visible in the protoplasmic face (P face) D. No bumps will be visible in either face
Answer the following statements true (T) or false (F)
1.Oceanic currents help to determine coastal climates based on the temperature of the water which they carry. 2.When a traveling companion says that the light seems dimmer in Canada than it did in the Caribbean, and points to the differences in the kinds of plants in the two places, you answer that it is due to the curvature of Earth, spreading the same amount of light over a greater area as you travel north. 3.If you were taking a long trip and wanted to describe the different biomes which you encountered, you would note things like temperature, precipitation, kinds of plants, and kinds of animals. 4.Studies in the Southern Hemisphere have shown that plants that shifted biomes between generations usually migrated to a biome similar to the one that they left. 5.Studies of modern biomes and changes in them can help us understand the history of biomes earlier in evolution.
Which of the following is NOT true about reverse transcriptase?
A. In RNA viruses it uses a DNA intermediate to make more RNA B. It does not enable HIV to infect the cells C. It can be found in DNA and RNA viruses D. It is a type of polymerase E. In DNA viruses it uses an RNA intermediate to make more DNA