In which type of microscopy do the specimens appear to be three-dimensional (3-D), allowing their external features to be viewed best?
a. Scanning electron microscopy (SEM)
b. Transmission electron microscopy (TEM)
c. Phase-contrast microscopy
d. Darkfield microscopy
Answer: a. Scanning electron microscopy (SEM)
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Match the choice on the left with the choice on the right
A) spatial structure B) linear structure C) AMP D) monosaccharide E) adenine F) quaternary structure G) starch H) cytosine I) collagen J) amino acid K) enzyme L) steroids M) guanine 1) monomer of protein 2) polymer of glucose 3) pyrimidine 4) nucleotide 5) multimeric complex 6) Haworth projection 7) a fibrous protein
Discuss adaptations for terrestrial life seen in land plants. What will be an ideal response?
Carbon first becomes part of a living thing as a result of
A. nitrogen-fixing bacteria. B. decomposer organisms. C. photosynthesis. D. aerobic respiration.
Which of the following may have cell walls containing teichoic acids?
A) Gram-negative bacteria only B) Gram-positive bacteria only C) archaea D) both Gram-positive and Gram-negative bacteria E) all prokaryotes