ch. 7 quiz Flashcards
the distribution of different organisms over the surface of the earth
offers evidence for evolution
Lamarck believed
- that evolution was a strive to become more perfect
- in the inheritance of acquired characteristics
- that giraffes’ necks elongated in response to stretching
- that environmental pressures bring about changes in organisms
which theory was helpful to Darwin in the formulation of his theory of evolution?
populations produce more offspring than the environment can support
the place Darwin visited on his trip around the world that had the greatest impact on his thinking was
the Galapagos islands
Darwins idea of fitness depends upon the fact that
some individuals have a better chance to produce more offspring
Darwins idea of fitness depends upon the fact that
some individuals have a better chance to produce more offspring
new genes (alleles) arise from
mutation
directional selection occurs when
the organisms on one extreme of the population have a better chance to survive than those on the other extreme
the difference in the appearance of the male and the female is known as
sexual dimorphism
the introduction of a small population onto an island that results in a limited gene pool for a population is an examples of the ____
founder effect
the wings of a bird and the wings of a butterfly are ___ and show morphological ____.
- analogous
- convergence
