Which of the following are in the class Anthozoa?
A. Hydra
B. Obelia
C. Cyanea
D. corals
E. jellyfish
D
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What is the difference between mutualism and synergism?
A. In a synergistic relationship, both organisms benefit, but in a mutualistic relationship both organisms are harmed. B. In a mutualistic relationship, the organisms are dependent upon each other. C. In a synergistic relationship, the organisms cannot survive without each other. D. In a mutualistic relationship, both organisms benefit, but in a synergistic relationship both organisms are harmed.
Immediately inside the epidermis of a eudicot stem is the pith
____________________ Indicate whether the statement is true or false.
The specialized cells in the nervous system that serve to conduct a signal are known as
A. neuroglia. B. dendrocytes. C. Schwann cells. D. astrocytes. E. neurons.
The finding that MSH (melanocyte-stimulating hormone) causes frog skin cells to darken when added to the interstitial fluid but has no effect on color when injected into the cells supports which of the following ideas?
a. MSH is a tropic hormone. b. MSH is a neurohormone. c. MSH binds to cell surface receptors. d. MSH is a steroid hormone. e. MSH is a steroid hormone and binds to cell surface receptors.