The accompanying image is the product which type of microscope?

a. phase-contrast light microscope

b. Nomarski differential interference microscope

c. transmission electron microscope

d. scanning electron microscope

e. confocal fluorescence microscope


d

Biology & Microbiology

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In humans, there are _______ autosomal linkage groups, plus an X and Y chromosome linkage group

A. 23 B. 46 C. 22 D. 92

Biology & Microbiology

The mutation that causes SCD causes what kind of change in the structure of hemoglobin?

A) decreases heme-binding ability B) fewer chains of amino acids (trimeric rather than tetrameric structure) C) a single amino acid substitution that alters the structure of the tetramer D) addition of a single amino acid that causes a longer protein subunit E) loss of a single amino acid that causes a frameshift and premature stop codon

Biology & Microbiology

Which of the following is NOT related to genetic drift?

A. Bottleneck effect B. Neutral variation C. Non-Darwinian evolution D. Founder effect E. Sexual selection

Biology & Microbiology

Nationwide, over 100,000 patients a year die form septic shock. This is due to

A. the presence of lipopolysaccharide in the outer membrane. B. lipoteichoic acid in the cell wall. C. a cytotoxin similar to the diphtheria toxin. D. coagulase. E. a neurotoxin similar to botulin.

Biology & Microbiology