What are the signs of skin cancer that distinguish it from other skin irregularities?
What will be an ideal response?
Look for the ABCDs: A reminds us of asymmetry, or an irregular shape; B stands for a diffuse border; C is for an uneven color; and D helps us to remember to look for a diameter greater than 5 mm (approximately 0.2 inch).
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Which one of the following scientists tested the hypothesis that microorganisms can arise by spontaneous generation?
A. Elena and Lenski B. Redi C. Pasteur D. Darwin E. Alvarez
Scorpions have a prosoma, pedipalps that are modified into claws, and chelicerae. Which taxonomic group are they a member of?
A. Chelicerata B. Hexapoda C. Crustacea D. Myriapoda
Which of the following occurs during a nerve impulse?
A. Sodium ions flow out of the cell. B. Sodium ions flow into the cell. C. Potassium ions are pumped into the cell. D. Potassium ions are pumped out of the cell.
Mineralization refers to ________.
A. the incorporation of inorganic material into organic materials B. the utilization of minerals as energy sources C. the breakdown of organic materials to inorganic materials D. the release of various minerals from ores