In performing a Gram's staining techniques, the counterstain is
A. Methylene blue
B. Crystal violet
C. Safranin
D. Malachite green
E. Gram's iodine
Ans: C. Safranin
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Answer: c
Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will most directly affect the _____
A) splitting of water B) flow of electrons from photosystem II to photosystem I C) synthesis of ATP D) reduction of NADP+
Bats contain brown fat between their shoulder blades. How could this brown fat be an adaptation to torpor?
A) Brown fat has many mitochondria, so it can produce more ATP. B) Brown fat can produce heat and ATP through fermentation. C) The mitochondria in brown fat can produce heat without making ATP. D) It is not an adaptation; white fat is what they need to produce heat.
Most evolutionary "branches" on the tree of life can read like the story of stepwise challenge and evolutionary innovation. For example, a cuticle solved the problem of maintaining moisture in the first terrestrial plants. Outline and explain the steps
in the evolution of terrestrial vertebrates that lead to the evolution of mammals. What will be an ideal response?