Human diet must be varied enough to provide ____________________ of the 20 amino acids from the foods we eat
Fill in the blank(s) with correct word
9
nine
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Virulence factors of S. pyogenes include
A. hyaluronic acid capsule. B. polysaccharides on the cell wall. C. lipoteichoic acid. D. spiky M proteins. E. All of the choices are correct.
Experiments with bacteria and __________ offered
solid evidence that deoxyribonucleic acid (DNA), not protein, is hereditary material. Fill in the blank(s) with the appropriate word(s).
Closer observation reveals that these small spheres are produced on tiny extensions of the stem, each of which helps compose the strobilus. These small, spore-producing extensions of the stem are called
A) scales B) sporangia C) sporophylls D) gametangia
Ecdysone, a steroid hormone, controls ____.
A. the menstrual cycle B. molting in arthropods C. the wake-sleep cycle D. the formation of hormone receptors E. the formation of sperm