The sense organ in Figure 43-1 could be found in:
a. the semicircular canal of the human ear and in the lateral line organ of fish.
b. the cochlea of the human ear and the semicircular canal of the fish ear.
c. the semicircular canal of the human ear and the statocyst of invertebrates.
d. the utricle and saccule of the human ear and the statocyst of invertebrates.
e. the lateral line of fish and the statocyst of invertebrates
A
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Variation is usually introduced by the process of _________?
a. random fertilization
b. mutation
c. random mating
d. recombination between homologous chromosomes during meiosis
e. all of the above
In an allergic reaction, histamine is released from _______ cells found in peripheral tissues.
Fill in the blank(s) with the appropriate word(s).
Despite an international agreement signed in 1987 to phase out the production of CFCs, depletion of the ozone will continue to affect Earth and its atmosphere for at least another one hundred years
Indicate whether the statement is true or false
When conditions are inhospitable, some protists become dormant by forming ________.
Fill in the blank(s) with the appropriate word(s).