Broad scale regions dominated by similar types of ecosystems are called
A) communities.
B) biospheres.
C) biomes.
D) landscapes.
C
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A patient of yours is injured in a car accident. The surgeon reports that while there is damage to the dorsal roots, the spinal cord and nerves otherwise appear intact. What functions would you expect to be affected in the patient?
A. The patient may lose somatic function, but should retain autonomic function. B. The patient may lose motor function, but should retain sensory perception. C. The patient may lose some sensory perception, but should retain motor function. However, lack of proprioceptive input may make muscle control difficult. D. The patient may lose parasympathetic function, but should retain sympathetic function. They should avoid stressful situations.
Both mitochondria and chloroplasts are thought to have evolved by the process of ____
a. endosymbiosis b. viral reassortment
c. transformation d. decomposition e. nitrogen fixation
The third line of defense against foreign invaders can be described as having ________ and ________.
A. diversity; barriers B. complexity, versatility C. surveillance; complexity D. specificity; memory
Which one of the following occurs with each cycle of the sodium-potassium pump?
A) Sodium is moved into the cell, creating a net negative charge outside the cell. B) The net effect is removal of one osmotic particle and one positive charge from inside the cell. C) The net effect is removal of one osmotic particle and one negative charge from inside the cell. D) The inside of the cell becomes more negative as potassium is pumped out. E) Two potassium ions and three sodium ions are pumped out of the cell.