The pH of human blood is approximately 7.4 and the body temperature is approximately 37 °C. Which of the following best describes a human pathogen?
A) neutrophiles & acidophiles
B) acidohphiles & thermophiles
C) neutrophiles & mesophiles
D) thermophiles & mesophiles
Ans: C) neutrophiles & mesophiles
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Which plant cells are the most common and the least specialized?
A. epidermis B. collenchyma C. sclerenchyma D. parenchyma E. meristem
Gene sequences that evolve at a constant rate can be used to ____
a. index the time of divergence between two species b. calculate speciation rates across lineages c. calculate speciation rates within different lineages d. index the number of extinct species within a lineage e. calculate extinction rates across lineages
What is the frequency of the B allele?
A) 0.001 B) 0.002 C) 0.100 D) 0.400 E) 0.600
Loci that are far apart:
A. have less attraction than close loci. B. influence the phenotype to a lesser degree than loci that are close together. C. have a higher recombination rate than loci that are close together. D. exhibit a recombination frequency of greater than 50%. E. always segregate together in meiosis.