Which of the following is not a characteristic of echinoderms?
A. They have radial symmetry in adults.
B. They have spiny skin.
C. They exhibit cephalization.
D. They have bilateral symmetry in larvae.
E. They have a complete digestive tract.
C. They exhibit cephalization.
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The nitrogenous waste in mollusks is removed by
A. flame cells. B. Malpighian tubules. C. flagella. D. nephridia. E. incurrent siphon.
Pituitary dwarfism is caused by:
a. hypersecretion of thyroxine during childhood. b. hyposecretion of thyroxine during childhood. c. hypersecretion of growth hormone during childhood. d. hyposecretion of growth hormone during childhood. e. hypersecretion of epinephrine during childhood.
Which is mismatched?
What will be an ideal response?
Which of the following is not a main goal of inflammation?
A) produce localized heat and swelling in an effort to denature key bacterial proteins B) limit the spread of infectious agents C) recruit immune defenses to the injured tissue D) transport chemical factors essential for tissue recovery E) deliver oxygen and nutrients