Most of the medically important multicellular parasites are arthropods or helminths
Indicate whether this statement is true or false.
TRUE
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What is a characteristic of the cell walls of mature plant cells?
a. pectin b. cellulose c. glue-like polysaccharides d. lignin e. a gluey matrix containing rope-like strands
Many new species of desert lizards have arisen from a nonnative population which was introduced into the American
southwest. This example best describes:a. the effects of climatic change. b. sympatric speciation. c. allopatric speciation. d. adaptive radiation. e. microevolution.
After fermentation in human cells, lactate is converted to pyruvate in the
A) bone marrow. B) heart. C) muscles. D) lungs. E) bloodstream.
You find a wormlike, soft-bodied adult animal in a mudflat. It is bilaterally symmetrical, is segmented, has a true coelom, and has a complete digestive tract. Based on these characteristics, what phylum does the animal represent?
A) Cnidaria B) Platyhelminthes C) Nematoda D) Annelida