If you were to view a sample of animal tissue under a light microscope and notice an extensive extracellular matrix surrounding a tissue, which tissue type would you most suspect?
A) connective
B) cardiac muscle
C) epithelial
D) nervous
E) striated muscle
Answer: A
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It could be said that today's Australian marsupials and today's placental mammals have
A. undergone divergent evolution. B. undergone selective advantage. C. undergone heterozygote advantage. D. undergone convergent evolution. E. developed homologous structures.
An enzyme is active in the stomach of an animal but quickly loses its activity when it leaves the stomach. This example illustrates that enzymes are
A) specific to the organs in which they are produced. B) inactivated by movement. C) sensitive to changes in pH. D) inactivated by inhibitors in the small intestine. E) consumed by the quantities of substrate in the small intestine.
Which bacterium is capable of withstanding doses of radiation that are several times higher than human cells can tolerate?
A) Staphylococcus aureus B) Saccharomyces cerevisiae C) Deinococcus radiodurans D) Escherichia coli E) Conus magus
Ciliated gills in clams, sharks continuously swimming with their mouths partly open, countercurrent flow of blood and water in fish gills, and the use of air sacs to effect unidirectional flow of air through bird lungs are all adaptations that optimize what factor in the formula for Fick's law of diffusion?
A. A B. d C. ?p D. D