____________________ secrete hormones into blood. Fill in the blank(s) with the appropriate word(s)
ANSWER: Endocrine glands
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All components of a muscle have ____ orientation, resulting in ____
a. the same; a concerted pull in the same direction b. the same; a concerted push in the same direction c. a random; a dispersion of force d. a random; a concentration of force in the center of the muscle e. the same; a concentration of force in the center of the muscle
If a plant were grown in a nutrient solution containing all known essential elements except one, this
would be an example of: a. agriculture. b. mutualism. c. weathering. d. hydroponics. e. salinization.
Which of the following characteristics is present in all chordates?
A. gills B. notochord C. vertebrae D. All of the above are correct.
When a protein is denatured, which level of protein structure is unaffected?
A. primary B. secondary C. tertiary D. quaternary