The transition zone between biomes is called a(n) ecotone. Indicate whether the statement is true or false
True
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Despite the invariance of the peptidoglycan backbone's structure, there are more than 100 different types of peptidoglycan
Indicate whether the statement is true or false.
Wilting of a plant occurs
a. if the plant is placed in an isotonic solution. b. if there is a rise in turgor pressure. c. as a result of facilitated diffusion. d. if the plant is placed in a hypertonic solution. e. if the plant is placed in a hypotonic solution
Certain small towns in the western United States have remained isolated and inbred since their settlement many years ago. Some alleles are more common in these communities as compared to the rest of the population. This effect is known as
A. disrupting selection. B. Hardy-Weinberg principle. C. founder effect. D. artificial selection. E. directional selection.
Which of the following best explains why bacteria have the greatest biomass of any other plant or animal on earth?
a. Bacteria are able to live essentially anywhere—soil, air, water, ice, etc. b. Some bacteria can make their own food. c. Some bacteria can survive and thrive with or without oxygen. d. There is one dominant species of bacteria that has a greater molecular weight than other bacteria, accounting for the high biomass. e. The first three choices are correct.