Which is not true of placoderms?
a. They gave birth to live young.
b. They had jaws.
c. They had teeth.
d. They had paired pelvic fins.
e. They had paired pectoral fins
C
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Why must T cell activation take place outside the thymus?
A. An activated T cell could destroy the other maturing T cells. B. An activated T cell could then destroy the thymus gland itself. C. Many T cells are self-reactive and must be eliminated in the thymus before any possibility of activation. D. Other cell types might be accidentally activated in the thymus.
The resurrection plant
a. is a species of Selaginella. b. grows in the desert Southwest of the United States. c. is a member of the phylum Lycophyta. d. all of the above.
____ help(s) unfolded or misfolded proteins achieve their proper three-dimensional conformation
A) ribonuclease B) molecular chaperones C) endoplasmic reticulum D) ribosomes
Glucocorticoids (i.e., cortisol, prednisolone, dexamethasone) have a diverse number of functions. They include glucose mobilization during stress, development of lung tissue, and therapies to reduce inflammation.
Answer the following statement true (T) or false (F)