True or False: The antigen-binding proteins in the adaptive immune system are part of the immunoglobulin gene superfamily
a. TRUE
b. FALSE
Answer: A
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How many identical chromatids occur in each tetrad formed during mitosis?
a. one b. two c. zero d. four
Unattached earlobes are a dominant trait in humans. Which phenotype does an individual with the genotype EE show?
A. Both earlobes are unattached. B. Both earlobes are attached. C. The right earlobe is unattached and the left earlobe is attached. D. The right earlobe is attached and the left earlobe is unattached. E. Both earlobes are extremely elongated.
Zooxanthellae are photosynthetic algae living within the tissues of reef-forming corals
Indicate whether the statement is true or false
A probable sequence of the evolution of cells was
A. autotroph ® aerobic heterotroph ® anaerobic heterotroph. B. anaerobic heterotroph ® aerobic heterotroph ® autotroph. C. anaerobic heterotroph ® autotroph ® aerobic heterotroph. D. aerobic heterotroph ® autotroph ® anaerobic heterotroph.