In the brain, cerebrospinal fluid flows through the
a) dura mater.
b) subarachnoid space.
c) arachnoid mater.
d) pia mater.
Ans: b) subarachnoid space.
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Excess sugars stored by high-latitude algae can
a. serve as accessory to cellulose. b. serve as antifreeze in winter. c. keep predators away. d. confuse predators with different colors. e. protect the algae from wave damage.
Sieve tubes are different from vessel members in that they:
a. carry water, not food b. are not connected to each other c. are alive d. do not require companion cells e. have pits in their walls
For a neuron with an initial membrane potential at -70 mV, an increase in the movement of potassium ions out of that neuron's cytoplasm would result in the _____
A) depolarization of the neuron B) hyperpolarization of the neuron C) replacement of potassium ions with sodium ions D) replacement of potassium ions with calcium ions
Which 3 are true of dominant and recessive traits?
What will be an ideal response?