How many heme groups does each hemoglobin molecule contain?
a. one
b. two
c. four
d. eight
c. four
Biology & Microbiology
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The rickettsias are divided into groups based loosely on
A) the types of clinical disease they produce. B) their insect vectors. C) taxonomy. D) their biochemical requirements.
Biology & Microbiology
If gastrulation failed to occur, which of the following structures would not be formed?
A. ectoderm B. blastocyst C. inner cell mass D. epiblast E. All of the answer options are correct.
Biology & Microbiology
The edible portion of the mushroom is the ________
A) mycelium B) hypha C) spore D) above-ground reproductive structure
Biology & Microbiology
Flimmer filaments ________.
A. function to move cells on solid surfaces B. are components of all eukaryotic flagella C. permit flagella to pull rather than push the cell D. are found on whiplash flagella
Biology & Microbiology