Which of the following assumptions or observations is not part of Darwin's idea of natural selection?
A) Whether an organism survives and reproduces is almost entirely a matter of random chance.
B) Heritable traits that promote successful reproduction should gradually become more common in a population.
C) Populations produce more offspring than their environment can support.
D) Organisms compete for limited resources.
Answer: A
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Which stage of syphilis is characterized by a skin rash?
A. Primary B. Secondary C. Latent D. Tertiary
The easiest method of preventing sea stars from moving is to
A. plug their madreporite. B. lay them on their arboreal side. C. squeeze the tube feet as they are extended from the body. D. cut off two of their arms. E. None of these actions would prevent a sea star from moving.
Light-harvesting pigments in the chloroplast include chlorophyll and the yellowish accessory pigments called ________
Fill in the blank(s) with correct word
Mobile bits of DNA that can jump from one location on a chromosome to another location and do not code for a protein are called
A. transposons. B. exons. C. introns. D. pseudogenes. E. simple sequence repeats.