Carbon-14 dating is best used for determining ages of ________
a. metamorphic rock samples 2 to 3 billion years old
b. carbon-containing samples less than 100 years old
c. igneous rock samples 3 to 4 billion years old
d. carbon-containing samples less than 60,000 years old
d
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The growth rate of a given species of microorganism is dependent on the composition of the medium in which it is grown.
Answer the following statement true (T) or false (F)
Darwin and Wallace's theory of evolution by natural selection was revolutionary because it _____
A) was the first theory to refute the ideas of special creation B) proved that individuals acclimated to their environment over time C) dismissed the idea that species are constant and emphasized the importance of variation and change in populations D) was the first time a biologist had proposed that species changed through time
Which of the following is NOT a principle used when constructing cladograms?
A. All species or higher taxa are placed on tips in a phylogenetic tree. B. All species or higher taxa are placed on nodes in a phylogenetic tree. C. Each cladogram branch point should have one or more shared derived characters that are common to all species above the branch point, unless the character is later modified. D. All shared derived characters appear together only once in a cladogram unless they arose independently during evolution more than once.
Differentiate between primary and secondary growth in plants, as to the result of each, and where each
type of growth would be most likely to occur. What will be an ideal response?