Which of the following is false with regard to the extracellular matrix?
A) These structures are external to the cell membrane, but are still an integral component of cell function.
B) Extracellular matrices are only found in association with eukaryotic cells.
C) Extracellular matrices play a role in determining the shape of a cell.
D) Bone and cartilage are examples of cells that have specialized extracellular matrices associated with their function.
E) Extracellular matrices play a role in determining the mechanical properties of tissues and organs.
B) Extracellular matrices are only found in association with eukaryotic cells.
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To conduct a phylogenetic analysis, we need an outgroup to:
A. decide which characters are analogous and which are homologous. B. determine which character states are ancestral and which are derived. C. determine which characteristics to include in our analysis. D. decide which molecular data to use. E. All of the answer options are correct.
During the first emergence of life, the atmosphere was ____.
A. high in oxygen, high in carbon dioxide B. high in hydrogen, low in oxygen C. changing from anaerobic to aerobic D. aerobic E. high in oxygen, low in carbon dioxide
A small group of mice are released on an island without mice but with abundant food for mice and no predators. Initially, the growth of the mouse population will be limited mainly by what?
A. only density-dependent factors B. only density-independent factors C. the biotic potential D. the carrying capacity
Oral lesions called Koplik's spots are seen in patients with
A. influenza. B. croup. C. rubella. D. measles (rubeola). E. mumps.