Which statement about resting potential is true?
A) A resting membrane allows much more sodium than potassium to diffuse across it.
B) The concentration of sodium is much higher inside the cell than outside.
C) The resting potential exists because of differences in glucose concentration inside and outside the cell.
D) The sodium-potassium pump contributes to the resting membrane potential.
Answer: D
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In 2013, scientists in Europe discovered a new organelle in grapes that they named the tannosome. This discovery was the result of creative microscopy. If looking to discover a new organelle, which are located inside the cell, what kind of microscope must be used?
a. brightfield microscope b. scanning electron microscope c. transmission electron microscope d. compound light microscope.
Name two factors that will influence the composition of aquatic communities
What will be an ideal response?
According to the biological species concept, the evolution of reproductive barriers is the key to the origin of new species.
a. true b. false
The substance that is secreted by a bacterial pathogen is known as ___________.
A. exotoxin B. siderophores C. endotoxin D. chlamydia E. Coxiella