Which of the following is an example of a postmating mechanism that limits formation of a hybrid offspring?
a. temporal isolation
b. ecological isolation
c. hybrid inviability
d. geographic isolation
e. behavioral isolation
Answer: c. hybrid inviability
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A selectively ________ membrane is one that allows some molecules to pass through but not others.
Fill in the blank(s) with the appropriate word(s).
Match the item to its definition.
A) collection of dendrites B) collection of axons C) discontinuous insulation of the dendrite D) process that sends electrical signals toward from the cell E) excess of positive charge within the cell and excess of negative charge outside the cell F) discontinuous insulation of the axon G) region of nerve cells where the myelin sheath is incomplete H) gap between adjacent nerve cells I) excess of negative charge within the cell and excess of positive charge outside the cell body J) process that sends electrical signals away from the cell body 1) dendrite 2) nerve 3) myelin sheath 4) nodes of Ranvier 5) resting membrane potential 6) axons 7) synapse
Which of the following animals does NOT have electroreceptors?
A. bony fish B. sharks C. duck-bill platypus D. skates E. pit viper snakes
The protozoal disease known as (cutaneous/mucocutaneous/visceral) leishmaniasis is potentially fatal.
Fill in the blank(s) with the appropriate word(s).