What are the two components of the cardiovascular system?
A. veins and heart
B. arteries and veins
C. capillaries and veins
D. heart and blood vessels
E. arteries and heart
Answer: D
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The simultaneous use of both organic and inorganic forms of carbon is called ________.
A. metatrophy B. osmotrophy C. omnitrophy D. mixotrophy
Below are partial results of chemical sampling of one stream. What do these results tell you about the suitability of this stream as fish habitat? What are likely causes for these values?
What will be an ideal response?
If cell walls or are not perforated,
a. xylem and phloem will not be able to function as vascular tissue. b. gas exchange will not occur across the stomata. c. water will not enter the epidermal cells of the root. d. the terminal bud will not cause the stem to elongate. e. all of these will occur.
Which of the following is a cause of interrupted
breathing? a. a tumor in the brain near the medulla oblongata b. lung cancer c. high altitude sickness d. low red blood cell count e. none of these