The notochord will serve as a template for the formation of the
a. spinal cord.
b. vertebral column.
c. brain.
d. peripheral nervous system.
e. brain stem.
B
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In a cell,
a. energy-releasing reactions are coupled to energy-absorbing reactions. b. there are many more energy-absorbing reactions than energy-releasing reactions. c. energy-absorbing reactions and energy-releasing reactions are unlinked. d. energy-absorbing reactions are coupled to energy-releasing reactions via electron carriers. e. more energy is used up than is produced.
The extent to which a particular perception is
produced is mainly due to the a. sensitivity of the receptors. b. speed of nerve transmission. c. brain area devoted to interpretation. d. transmitter substances at the synapses. e. amount of stimulus.
Which structure of the virus in the accompanying figure is the capsid?
a. 1
b. 2
c. 3
d. 4
e. 5
Most of the Earth's phosphorus is trapped in sedimentary rocks.
Answer the following statement true (T) or false (F)