A taproot system lacks
(a) lateral roots.
(b) a taproot.
(c) both of the above.
(d) none of the above.
(d) none of the above.
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Interaction of a pathogen-associated molecular pattern (PAMP) with a pattern recognition receptor (PRR) results in
A) formation of transmembrane pores that cause cell lysis. B) transmembrane signal transduction that initiates transcription of genes involved in phagocytosis, inflammation, and pathogen killing. C) molecular activation of the adaptive immune system. D) a superantigen reaction that can cause septic shock.
Which of the following allows cells to recognize each other?
a. Glycolipids b. Protein channels c. Carbohydrates d. Cholesterol
When you feel threatened, the
neurotransmitter, ___, is released from ___ neurons and your response is to fight or flee.
a. acetylcholine--sympathetic b. acetylcholine--parasympathetic c. norepinephrine--sympathetic d. serotonin--sympathetic e. serotonin--parasympathetic
Which layer of the digestive tract is in direct contact with digested food?
a. mucosa b. circular muscle c. longitudinal muscle d. submucosa e. serosa