A given medium can be either selective or differential but not both.
Answer the following statement true (T) or false (F)
False
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A testcross involves
a. two F1 hybrids. b. an F1 hybrid and an F2 offspring. c. two parental organisms. d. an F1 hybrid and the homozygous dominant parent. e. an organism of dominant phenotype but unknown genotype and an organism that is homozygous recessive for that trait.
DNA sequencing data suggest that evolutionary changes are related to an accumulation of:
a. changes in DNA nucleotide sequences. b. homologous structures. c. index fossils. d. vestigial organs. e. convergent structures.
Under what environmental conditions do yeast carry out fermentation?
A. high osmotic pressure B. low pH C. high temperature D. absence of oxygen E. All of the choices are correct.
In an atom with a neutral overall charge, the number of protons is equal to the ________.
A. number of electrons minus the number of neutrons B. atomic mass C. number of electrons plus the number of neutrons D. number of electrons