Imagine you are studying a population of finches over time and observe an increase in average beak size over many generations. This is an example of ______________ selection.
Fill in the blank(s) with the appropriate word(s).
directional
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What term refers to wealth or resources invested in business with the intent of producing a profit?
A. the modern world system B. industrialization C. an open class system D. socioeconomic stratification E. capital
Which is the single greatest obstacle to slowing climate change?
A. the growing population of the poorer nations in the world B. having scientists decide on a definition of climate change C. proper climatic changes D. a lack of data portraying the effects of climate change E. meeting energy needs, particularly in energy-hungry countries such as the United States, China, and India
A recessive allele __________
a. needs to be present on only one chromosome to be expressed b. is never expressed c. needs to be present on both chromosomes to be expressed d. occurs as a regulatory gene only
A(n) ________ is an implement made from the core of a rock nodule
Fill in the blank(s) with correct word