Which of the following is a harmless bacterium, in which mutated strains may cause toxic shock syndrome, inhabits your skin?
A) Aeromonas hydrophila
B) Streptococcus pyogenes
C) Clostridium tetani
D) Vibrio cholerae
E) Staphylococcus aureus
E
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Explain how the resulting phenotypic ratios from Mendel's dihybrid cross assisted him in framing his Second Law
What will be an ideal response?
A polysome is ____
a. the combination of a large and a small ribosomal subunit b. the complex where mRNA splicing occurs c. the promoter assembly at the site of transcription initiation d. an mRNA transcript to which multiple ribosomes are attached e. the complex that adds a poly(A) tail onto an mRNA
All chemoautotrophs and photoheterotrophs are ____
a. archaea only b. bacteria only c. eukaryotes only d. prokaryotes and eukaryotes e. prokaryotes
Answer the following statements true (T) or false (F)
1. Natural selection is random because no individuals are eliminated from reproducing due to different environments. 2. Evolution occurs in individuals, not populations. 3. In an evolutionary sense, fitness refers to an organism's contribution to the next generation's gene pool. 4. Since the conditions needed for the Hardy-Weinberg principle do not occur in real populations, this principle has no importance in population studies. 5. Nonrandom mating, gene flow, and genetic drift are mechanisms of microevolution.