A free-swimming jellyfish has a body form known as a
(a) polyp.
(b) strobila.
(c) medusa.
(d) hydra.
(c) medusa.
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Which of the following correctly lists structures in order starting at the outer ear?
a. cochlea, eardrum, ear canal, hair cells b. ear canal, eardrum, stapes, cochlea c. incus, stapes, ear canal, cochlea d. eardrum, hair cells, ear canal, stapes
Which of the following statements is false?
a. Lizards are a very small component of the present-day reptiles. b. Lizards gave rise to the snakes. c. Some lizards are not predators. d. Lizards have over lapping scales on their bodies. e. All lizards are roughly the same size
What is the name of an extracellular messenger protein that is named for its ability to kill tumor cells and also serves as an apoptotic stimulus?
a) tumor death factor b) tumor angiogenesis factor c) tumor necrosis factor d) tumorigenic factor e) necromancer factor
Which antibodies in tears, saliva, and mucus help protect mucosal surfaces from many pathogens?
a) IgD b) IgA c) IgG d) IgM