Why are viruses not considered to be living organisms?
What will be an ideal response?
ANSWER: Viruses consist only of a nucleic acid molecule surrounded by a protein coat. They are not capable of carrying out all the activities of life such as reproduction, response to external
stimuli, growth, etc.
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Which of the following substances that are carried in blood can not diffuse across endothelial cells of a capillary?
a. carbon dioxide b. proteins c. small lipid-soluble molecules d. oxygen
During fermentation, ATP can be produced per glucose, compared with theoretical a yield of by aerobic respiration.
A. 2; 6 B. 30; 6 C. 6; 30 D. 2; 36 E. 36; 2
Nitrogenous wastes are produced during normal metabolism of ________
Fill in the blank(s) with correct word
The plant in row b of Figure 38-2 demonstrates a photoperiodic response characteristic of:
a. short-day plants. b. day-neutral plants. c. long-day plants. d. long-night plants. e. intermediate-day plants.