Various modifications in leaves can make plants better adapted to their habitats. Which of the following is not an evolutionary modification of leaves?
A. floral leaves
B. fruit-bearing leaves
C. reproductive leaves
D. spines
E. insectivorous leaves
Answer: B
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Bacterial isolates from post surgical infections of several patients on the same hospital floor demonstrate an increase in resistance to similar antibiotics. The pattern of antibiotic resistance in these cases is most likely due to vertical gene transfer among bacteria that carry resistance genes to bacteria that lack those genes.
Answer the following statement true (T) or false (F)
A wooded area is converted to a housing development and strip mall. Predict and briefly describe three (3) ways this change in land use could affect atmospheric carbon dioxide levels.
What will be an ideal response?
The number of species on an island depends on the size of the island and its distance from a mainland. This statement would most likely be made by _____
a. an explorer b. a biogeographer c. a geologist d. a philosopher
The neutralization of toxin molecules by antitoxins accomplishes all of the following except
A. Prevents attachment to specific molecules on the cell surface B. Inactivates the toxin molecule C. Lessens the ability of toxins to diffuse through the tissues D. Increases the activity between toxins and interleukins E. Masks the toxicity of toxin molecules