L100_Quiz4_ans

L100_Quiz4_ans - L100 Quiz #4 --- ANSWER KEY 1. (a) Explain...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: L100 Quiz #4 --- ANSWER KEY 1. (a) Explain the difference between analogous and homologous characters. (1pt) Analogous characters are characters that are similar due to common ecology pressures and not common descent. The similarities are superficial and not due to similarities in the underlying genes. Homologous characters are characters that are shared among individuals with a common line of descent. Species share the characters because their ancestors had it; differences are due to divergent evolution over time. (b) Which of the following sets of figures are analogous structures and which set homologous structures? (1pt) Analogous Homologous 2. Explain how the fossil record provides evidence for evolution (1pt). Fossils are formed as dead organisms are buried under sediment. Since the fossils are covered up as they die, and newer ones are laid down on top of already buried ones, the layers of fossil reflects a time sequence of once living organisms. If the fossils are examined, there is an obvious change in the distribution and types of organisms found at the various strata (layers of sediment). The changes in the morphological structures across the layers reflect changes in form and function over evolutionary time. structures across the layers reflect changes in form and function over evolutionary time....
View Full Document

This note was uploaded on 01/18/2012 for the course L 100 taught by Professor Dr.susanhengeveld during the Fall '11 term at Indiana.

Page1 / 3

L100_Quiz4_ans - L100 Quiz #4 --- ANSWER KEY 1. (a) Explain...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online