A test for metal toxicity looks at the amount of metal present in the red blood cell membrane. How long ago could metal poisoning have occurred and still be found in the cell membrane?
A. a few days
B. a week
C. 6 months
D. 3 months
E. a month
Answer: D
Biology & Microbiology
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Which one of the following is NOT associated with phloem tissues?
A. sieve tubes B. companion cells C. tracheids D. parenchyma cells E. plasmodesmata
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The surface of a plant root is called the ________.
What will be an ideal response?
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What type of tissue consisting of a single layer of cells containing cilia lines the throat and nasal passages?
a. simple epithelium b. simple squamous epithelium c. stratified columnar epithelium d. pseudostratified epithelium e. compound epithelium
Biology & Microbiology