A group of cells that are similar in structure and work together to perform a common function are referred to as a(n)
A) organ system.
B) tissue.
C) organ.
D) community.
E) organism.
B
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The leaves of ginkgo trees have:
A. unbranched veins B. forked veins C. multiply branching veins D. veins in a netlike pattern E. veins only around the edges
The main phenomenon that increases the efficiency of gas exchange in fish gills is the
A. countercurrent exchange mechanism. B. co-current exchange mechanism. C. high degree of oxygen saturation of water. D. back-and-forth movement of water that maximizes oxygen uptake. E. very high blood pressure found in the circulatory system of fishes.
In what way do fungi reproduce?
a. asexually by spores only b. budding of the parent body only c. sexually by gametes only d. asexually by spores and budding of the parent body only e. asexually by spores, budding of the parent body, and sexually by gametes
The individual credited with coining the term cancer is
A) Paget. B) Hippocrates. C) Folkman. D) Rous. E) Aristotle.