Epiphytes are non-parasitic plants that grow on other plants
a. True
b. False
ANSWER: True
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The waxy polymer on the leaves of vascular plants that protects them from pathogens is called
A. lignin. B. cutin. C. chitin. D. cellulose. E. sporopollenin.
Which statement accurately describes the properties of sound?
a. The frequency of a sound determines the loudness. b. The amplitude of a sound determines its pitch. c. The amplitude of a sound is the number of waves per second. d. A soft sound has a greater amplitude than a loud sound. e. A high note and a low note with the same amplitude are equally loud.
B cell receptors are:
What will be an ideal response?
A patient antibody titer which shows an increasing level of IgM but very little IgG would likely indicate that
A) the patient is currently a nursing mother. B) the patient has nearly recovered from the infection. C) the patient is having an allergic reaction. D) the patient is in the early stages of developing an immune response. E) the patient was vaccinated against this pathogen rather than having the infection.