When we speculate about the origin of life from inorganic material it seems logical that several events or steps were necessary. Which of the following is not a part of these ideas?
A. Organic molecules must first be formed from inorganic molecules.
B. Basic organic molecules form RNA that can serve as the genetic material and catalyze other reactions.
C. RNA becomes self-replicating.
D. The inorganic molecules must be collected together and segregated from other molecules by a membrane.
D. The inorganic molecules must be collected together and segregated from other molecules by a membrane.
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Which statement about diversity in eye development is not correct?
A. Planaria have the simplest eyes, which are basically pit-shaped cells containing photoreceptors. B. Evolution of the spherical lens improved images as animals evolved. C. Both squids and vertebrates have singlelens eyes, but they are very different in their development, anatomy, and physiology. D. The percentage of living animals possessing true eyes that can produce an image is small. E. Compound eyes consist of hundreds of small lenses arranged on a convex surface.
Which animal does not employ protective armor for predator defense?
A) armadillo B) beetle C) scorpion D) porcupine
You would predict to see the fewest amino acid sequence substitutions in a protein between a human and a(n) ________.
A. bird B. bacterium C. fish D. snake E. orangutan
For measuring water quality, which of the following LTB tubes should be subcultured?
A) Tubes that exhibit gas production B) Tubes that do not exhibit gas production