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Until the middle of the nineteenth century, all peppered moths (biston betularia) observed around manchester, england, were light in color. in 1845, a single black peppered moth was reported. as manchester became more industrialized and dark soot began to cover the bark of the trees, the frequency of black moths increased greatly. the change in proportion of light and dark forms resulted
select one:
a. disruptive selection.
b. directional selection.
c. stabilizing selection.
d. genetic drift.
e. increased mutation
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Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?
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Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?
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5points what is term for the process of gathering information through images taken at a distance? o a. global positioning o b. topography o c. remote sensing o d. cartography submit
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Until the middle of the nineteenth century, all peppered moths (biston betularia) observed around ma...
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