Exam 20: The Development of Evolutionary Thought

Describe Lamarck's four most important ideas that influenced Darwin's evolutionary theory.

Due to their similarities to fossilized glyptodonts, Darwin hypothesized that armadillos were ____ glyptodonts. ​

The notion of orthogenesis is no longer supported because we now know that evolution proceeds as an ongoing process of dynamic adjustment, not toward any fixed goal. ​

In the early twentieth century, ____ discovered that genes are carried on chromosomes.

The concept of ____, the view that slow and continuous physical processes, acting over long periods of time,produced Earth's major geological features, was proposed by ____.

Fossils in the deepest layers of sedimentary rocks are typically ____ compared to fossils in the more shallow layers.

Before Darwin, ____. ​

Which structure(s)grow(s)just in front of animal tissues where only the Hoxc6 geneis expressed? ​

Recent advances in molecular techniques allowed paleobiologists to sequence DNA that was preserved in a woolly mammoth that died ____ years ago.

Upon Darwin's return from his voyage on the H.M.S Beagle , he spent time breeding ____.

Darwin's inference that individuals within a population compete for limited resources was based on which observation(s)?

Evolutionary studies that use comparative morphology to analyze the structures of related organisms are primarily based on comparisons of homologous traits.

Lamarck argued that long-legged wading birdsare descended from short-legged ancestors that stretched their legs to stay dry while feeding in shallow water, and consequently produced offspring with slightly longer legs. Which mechanism did he use to support this argument?

Molecular techniques have revealed that ____ caused the loss of forelimbs in snakes.

When insect populations exposed to insecticides develop resistance to these toxic chemicals over time, it is an example of natural selection ____. ​