An organic nutrient that cannot be synthesized by the organism and must be provided is called a(n) ________.
A. element
B. macronutrient
C. growth factor
D. compound
E. trace element
Answer: C
Biology & Microbiology
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Bioluminescence occurs as a result of
a. luminescent organs. b. symbiotic bacteria. c. conversion of protein luciferin into light energy d. both a and b e. both b and c
Biology & Microbiology
The best treatment for acute diarrhea is oral replacement of electrolytes and water.
Answer the following statement true (T) or false (F)
Biology & Microbiology
Which of these enzymes is NOT an exoenzyme?
A. collagenase B. penicillinase C. elastase D. streptokinase E. ATP synthase
Biology & Microbiology
Melanin is produced in ____
a. connective tissue b. muscle tissue c. the integumentary system d. epithelial tissue e. the circulatory system
Biology & Microbiology