The F2 generation is determined by using a dihybrid cross mating between two individuals that are each for gene (genes).
A. homologous; two
B. heterozygous; one
C. homozygous; one
D. homozygous; two
E. heterozygous; two
E. heterozygous; two
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A protist such as Chlamydomonas may switch to sexual reproduction when:
A) there is little nutrition. B) hormones from nearby members of the species are detected. C) there are numerous predators. D) a 90-day cycle is completed.
What type of skeleton is found in annelids?
A) dermal skeleton B) endoskeleton C) exoskeleton D) notochords E) hydrostatic skeleton
Which of the following is not a reason why Clostridium difficile is an increasing concern in healthcare settings?
A) antibiotic misuse and overuse in the population B) antibiotic resistance C) emerging superstrains that make a third type of toxin D) the bacterium can naturally escape drugs and disinfectants by retreating into a resistant spore state E) additional modes of transmission have occurred in several isolated cases
A redox reaction involves the transfer of
A) an electron. B) carbon dioxide. C) a hydrogen ion. D) water. E) oxygen.