What idea is shared by both Lamarck's and Darwin's theories of evolution?
A. Traits acquired during an individual's lifetime can be inherited by their offspring.
B. Adaptation is driven by differences in survival and reproductive success.
C. Evolution involves a continuous increase in complexity.
D. Environmental changes can lead to the modification of traits.
Answer: D
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In a hypertonic environment, an animal cell will do which if the following?
a. swell b. stay the same size c. shrink d. cannot be determined
In E. coli, ? DNA integrates into which site on the bacterial chromosome?
A) ori B) trp C) bio D) gal E) att
A chromosome library is a collection of all of the DNA:a
that occurs in one species. b. contained in one chromosome. c. that would be found in the chromosomes of a typical cell of a particular organism. d. in a recombinant gene. e. that codes for functional enzymes in a chromosome of a particular organism.
Why are epithelial membranes not very thick?
A. Epithelial tissues can only reach a certain thickness because their growth is constrained by microtubules inside the cell membrane. B. Thick epithelial tissues would collapse due to the drying effect of the environment. C. Epithelial tissues are required to support other cells growing on top of the tissue. D. Epithelial tissues are programmed to stop dividing after only a few cell cycles. E. Epithelial tissues play a critical role in transport, and must be thin to allow diffusion to occur.