In which phase does the spindle apparatus appear?
What will be an ideal response?
Metaphase II
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Simple diffusion is defined as the movement of
What will be an ideal response?
Refer to the accompanying figure. Which best describes the red blood cells in Figure B?
a. These red blood cells have been placed in an isotonic solution.
b. These red blood cells have swollen in response to a hypertonic external solution.
c. These red blood cells have swollen in response to a hypotonic external solution.
d. These red blood cells have shrunken in response to a hypertonic external solution.
e. These red blood cells have shrunken in response to a hypotonic external solution.
Which statements about the Lake Victoria cichlid fishes are true? Check all that apply.
A. The adaptive radiation of the Lake Victoria cichlids may have resulted from a key evolutionary innovation. B. Many of the Lake Victoria cichlids have very specialized adaptations that allow them to occupy diverse habitats within the lake. C. Speciation of the Lake Victoria cichlids was mainly sympatric. D. The diversity of the Lake Victoria cichlids continues today because the lake is devoid of predators. E. The adaptive radiation of the estimated 300 species of cichlid fish was very rapid and took place during the last 200,000 years.
A lipid-soluble cofactor that can diffuse freely in the membrane of the electron transport chain and carry electrons across the membrane is ________.
A) ubiquinone (Q) B) Fe-S C) cytochrome c D) FADH2