Based on the structural similarity of vertebrate limbs, we can conclude that these structures are examples of ____
a. biogeography
b. mutations in master genes
c. analogous structures
d. morphological convergence
e. morphological divergence
ANSWER: e
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If an individual carries a mutation that results in a complete lack of MHC class I proteins, how would the individual's immune response be affected? Select all correct choices
A. Memory cell antibodies would not be able to attach to antigen epitopes. B. Cytotoxic T cells would not be able to target (and destroy) infected cells. C. Helper T cells would not be able to interact with antigen-presenting cells. D. Plasma cell antibodies would not be able to attach to antigen epitopes.
Eyes with single lenses that respond to light and darkness are found in many arthropods; these are the
A. compound eyes. B. ocelli. C. apposition eyes. D. ommatidia. E. superposition segments.
What key conclusion did Riesch and Schlupp draw from the life history data of the Atlantic mollies?
A. More energy is invested in producing larger offspring when the populations live in environmentally stressful habitats. B. The populations exposed to H2S are able to use the toxic molecule for metabolic energy. C. Genetic regulation in the species results in production of equal sizes of offspring whether exposed to stressful environments or not. D. More energy is invested in producing many more offspring when the populations live in environmentally stressful habitats. E. The populations are only able to survive and reproduce when in stressful environments of either darkness or H2S.
What are the cells that make up the liver?
A) fibroblasts B) osteocytes C) chondrocytes D) hepatocytes