Epidermal cells secrete a ____ to reduce water loss
a. trichome
b. cuticle
c. oily substance
d. upper epidermis
e. stipules
b
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What is the function of the nodes of Ranvier?
a. regenerate resting membrane potential after an action potential b. reduce current leakage from unmyelinated axon regions c. speed up action potential propagation by salutatory conduction d. store excess sodium and potassium ions between action potentials
The ultimate energy source for food production for most life on earth is
a. the atmosphere. b. the soil. c. autotrophs. d. the sun. e. heterotrophs
In a population characterized by type III survivorship, the probability of survival ____ with age
a. increases
b. decreases c. does not change d. first decreases then increases e. first increases then decreases
List and describe three virulence factors associated with bacteria that cause gastroenteritis
What will be an ideal response?