In the process of biological evolution, new species may evolve through exchange of genes from one species to another. This process is called
A. proteome transfer.
B. horizontal gene transfer.
C. vertical evolution.
D. vertical descent with mutation.
E. genomic sciences.
Answer: B
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Which of the following has not been considered as a "gold standard" taxonomic method applied to species designation.
A. Average nucleotide identity B. DNA-DNA hybridization (DDH) C. Microscopic cell phenotype D. Melting temperature of the DNA (a reflection of the G+C content)
Coevolution is:
A. the evolution of coenzymes B. two species reciprocally influencing each other's evolution C. random evolution not influenced by natural selection D. evolution of secondary metabolites according to fixed ratios E. coordinated evolution of sensory and motor pathways
Research using transgenic animal models of neurodegenerative diseases not only helps scientists understand the disorders, but also may lead to _____
a. new vaccines b. Drosophila genome sequencing projects c. discovery of the environmental causes of schizophrenia d. identification of the mutant gene that causes Huntington disease e. new drugs and treatments
The middle portion of a leaf that is sandwiched between the upper and lower epidermis is called the:
a.mesoderm. b. middle lamella. c. mesophyte. d. bundle sheath. e. mesophyll.