How much of your DNA is identical to the person who sits next to you in biology class?
A. 1%
B. 50%
C. 90%
D. 99.9%
E. 99%
Answer: D
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The heavier components of oil evaporate fairly quickly
Indicate whether the statement is true or false
Of the following, which is the oldest event?
a. origin of fungi b. appearance of land tetrapods c. formation of Pangea d. age of dinosaurs e. appearance of whales
Imaginal discs are:a
found in mammalian cells and control gene activation in mature somatic cells. b. paired groups of undifferentiated cells that are precursors of adult structures in Drosophila. c. found in plant cells and assist in the development of the flower. d. part of the salivary gland of Drosophila. e. found in Drosophila ovary cells and represent inactivated X chromosomes.
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.