Bacteria growing at lower temperatures have more saturated fatty acids in their membranes.
Answer the following statement true (T) or false (F)
False
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Transfection is:
A. the artificial introduction of viral DNA into a bacterial cell. B. the artificial introduction of viral DNA into a eukaryotic cell. C. the first step (attachment) of a viral infection using a recombinant virus. D. facilitated by treatment of cells with calcium chloride and heat shock. E. useful when recombinant DNA is not introduced via infection by a viral vector.
An animal breeder asks your advice about which of a number of traits could most effectively be selected for in his herd. Which would you most correctly suggest?
A) a trait with high VE B) a high VA relative to VP C) a high VP relative to VG D) a low h2 value E) a low selection coefficient
In a bacterium that possesses antibiotic resistance and the potential to persist through very adverse conditions, such as freezing, drying, or high temperatures, DNA should be located within, or be part of, which structures?
1. nucleoid region 2. endospore 3. fimbriae 4. plasmids A) 1 and 2 only B) 1 and 4 only C) 2 and 4 only D) 1, 2, and 4
Parental care of the young is usually associated with species with a type ________ survivorship curve.
A. I B. II C. III D. I or II (depending on the sex ratio) E. I or III (depending on whether the reproductive strategy is iteroparous or semelparous)