Decide Whether the Pair of Lines Is Parallel, Perpendicular, or Neither

question 79

Multiple Choice

Decide whether the pair of lines is parallel, perpendicular, or neither.
-The line through (-1, 6) and (-7, -10) and the line through (-7, -10) and (-4, -18)

• A)Parallel
• B)Neither
• C)Perpendicular

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Definitions:

Directional Selection

Directional selection favors individuals on one end of the distribution of phenotypes present in a population.

Paralogs

Genes within the same organism that have evolved by duplication and may have different functions.

Gene Family

A group of genes sharing a common origin that typically encode proteins with similar functions.

Molecular Clock

A method used to determine time based on base pair substitutions. Molecular clocks use the rates of molecular change to deduce the divergence time between lineages in a phylogeny, for example. They work best when they can be “calibrated” with other markers of time, such as fossils with known ages and placements.