Which of the following factors is most strongly reduced with increased forest size?
A) density of nymphs
B) percent nymphs infected
C) density of infected nymphs
D) density of deer infected
C
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Which of the following was observed by Erwin Chargaff?
A. Base composition of DNA does not vary from one species to another. B. The DNA isolated from different tissues of the same species all have the same base composition. C. Base composition changes as the organism ages. D. In all species, the number of adenines equals the number of guanines. E. In all species, A + T = G + C.
The bivalves and worms have red flesh due to presence of:
a. pigments absorbed from their prey items. b. hemoglobin. c. chromatophores. d. pigments similar to other deep-sea organisms due to a lack of light. e. structural colors for camouflage.
The evolution of populations due to chance is
A. natural selection. B. genetic drift. C. gene flow. D. has more effect in large populations than in small populations. E. genetic variation.
In cells, RNAs that can act like enzymes are called __________.
A. microRNAs B. peroxisomes C. ribozymes D. lysosomes