What characteristic do a bottleneck and a founder effect have in common? both encounter a population crash. both involve a portion of a population becoming isolated. both involve a decrease in a population's genetic diversity. both affect the entire population. both are a type of natural selection.

Patricia is told by her physician that her body and brain chemistry have physically adapted to the drug and that she has become dependent on the tranquilizers prescribed for her by another doctor.

What is turgor pressure, what causes it, and what does it do for a plant?

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils