A normally functioning muscle cell is in which stage of its cycle?
A. G2
B. anaphase
C. G0
D. cytokinesis
C. G0
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The myoglobin protein, which carries oxygen in muscle cells, has only the first three levels of protein structure. What can you infer about myoglobin?
A. Myoglobin is made of nucleic acids B. Myoglobin lacks hydrogen bonds C. Myoglobin is made of only one polypeptide chain D. Myoglobin is not helical or pleated
Which of the following was not present on Earth when mitochondria first evolved?
a. archaeans b. bacteria c. protists d. animals
What ecosystem services do wetlands perform?
What will be an ideal response?
What type of immunity results from the transfer of antibodies from the mother to the fetus?
a. naturally acquired active immunity b. naturally acquired passive immunity c. artificially acquired active immunity d. artificially acquired passive immunity