The most primitive plants are the
A. ferns.
B. flowering plants.
C. mosses.
D. pines.
C. mosses.
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When a crossover occurs within the inversion loop of a pericentric inversion, each recombinant chromatid will have (Select all that apply.)
A) a dicentric bridge. B) a duplication of some genes in the inverted region. C) a deletion of some genes in the inverted region. D) one copy of each gene, with some genes in a different order than normal. E) one copy of each gene in the normal order.
All of the following are autoimmune diseases
EXCEPT a. Graves' disease. b. multiple sclerosis. c. rheumatoid arthritis. d. AIDS. e. lupus.
One of the goals of synthetic biology is to:
A) all of these B) "custom build" a particular species of an existing organism C) develop novel life forms D) create a living cell int he laboratory
The following figure demonstrates the genotypic adaptive landscape of bacteria in me-dia lacking antibiotics
As with all adaptive landscapes, the height of the bars associated with a genotype indicate the fitness of that genotype. The R allele confers resistance to antibiotics, and the C allele compensates for the loss of fitness that the R allele confers in the absence of antibiotics. The rc haplotype lacks both compensation and resistance. Based on this landscape, why are resistance and compensation unlikely to be lost even in the absence of antibi-otics? a. A lack of mutation will prevent the haplotypes from changing. b. Epistasis will maintain haplotype frequencies. c. Haplotype frequencies do not change in Hardy–Weinberg populations. d. RC populations are stuck on a local maxima. e. Bacteria evolve slowly.