Which of the following describes the limb anatomy of australopithecines?
A. walked on all fours and used their tails for balance
B. walked on all fours, forelimbs longer than hindlimbs
C. walked upright, forelimbs longer than hindlimbs
D. walked on all fours, hindlimbs longer than forelimbs
E. walked upright, hindlimbs longer than forelimbs
Answer: C
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One interesting and surprising finding regarding the regulation of the ara operon is that it is under both positive and negative control. What protein is responsible for the dual action of this operon?
A) AraC is responsible for both the positive and negative control of the ara operon. B) RNA polymerasse is responsible for both the positive and negative control of the ara operon. C) AraD is responsible for both the positive and negative control of the ara operon. D) DNA polymerase is responsible for both the positive and negative control of the ara operon. E) AraBAD is responsible for both the positive and negative control of the ara operon.
When a neuron membrane potential becomes less negative, it is said to be ____
a. depolarized b. hyperpolarized c. repolarized d. damaged e. activated above the threshold potential
Helicobacter pylori has been associated with ____
a. irritable bowel syndrome b. duodenal ulcers c. peptic ulcers d. HPV e. GERD
Capillary action depends upon the force of
A. adhesion only B. cohesion only C. both transpiration and adhesion D. both adhesion and cohesion