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science Ch. 7

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natural selection
Although Darwin did not realize it, the variations he observed among the individuals of a population of finches were caused by
Natural selection and genetic variation
the theory of evolution combines the principles of
sedimentary
fossils are commonly found in
skeletal structures
A human's arm, a cat's front leg, a dolphin's front flipper and a bat's wing
they all deserved from a common organism
the fact that all organisms have DNA as their genetic material is evidence that
the beak
what body part of the Galapagos finches appears to have been Most modified by natural selection
fossils
the solidified remains or imprint of a previsously existing organism is called a
natural selection
individuals in a population that have traits or abilities that give them a competitive advantage over other population members are more likely to survive and reproduce. this principle is called
they multiply quietly
many insects can adapt very quickly to pesticides because
evolved
fossils of whale ancesstors show that present-day whales are distant cousins to a land-dwelling mammal called Mesonychid. these fossils provide evidence that organisms
adaption
structures and behaviors for finding food, protection, and for moving from place to place are an organisms ____________to its environment
adapation
In order for the red-eyed tree frog to produce fertile offspring, it should mate with its own species, which is
evolution
scientists esstimate that Earth is 4.6 billion years old. this is plenty of time for
mesonic
we call the time before the Paleozoic era
fossil record
to date, scientis have described and named about 300,000 fossil species from which they can compile a historical sequence of life, called
provides a historical sequence of life
the fossil record can supply evidence about
species need special conditions to fossilize
which of the following is the most likely reason that there are gaps in the fossil record
vestial structures
whales have remnants of hind-limb bones embedded deep inside their bodies. these remnants of once-useful structures are called
it lives in the water
prozeuglodon eventually lost its hind legs,. probably because
evolution
comparing differenet organisms' skeletal structures, DNA and embryonic structures all provide evidence that supports the theory of
natural selection
during his voyage on the HMS Beagle, Charles Darwin made observations that became the foundation for his theory of evolution by
the large ground finch is to dig hard seeds. the catus finch is to cactus/similiar, but not identical/genetic variation
Darwin obserbed that, compared ti tge abunaks and plants on the nearby South American mainland, the animals and plants on the Galapagos Islands were
selectively breed
over the past 12,000 years, dogs have been ______to produce more than 150 different breeds.
Darwin thought that population or organisms changed very slowly requiring a lot of time
why was Lyell's Principles of Geology important to Darwin
Because Darwin realized that the offspring of the survivors inherit traits that help them survive in their environment
why was Malthus' Essay on the Principal of Population important to Darwin
Overproduction, Genetic Variation, Struggle to Survive, Successful Reproduction
According to Darwin, the four steps in natural selections are
The process by which organisms with favorable traits survive and reproduce at a higher rate than organisms without the favorable trait
Which of the following best decribes natural selection
industrial revolution or environment change
Agter 1850, dark peppered moths became more abundant than pale peppered moths. which of the following factors influenced this change
Adaption, Division and separation
the three steps of speciation are
adaption
natural selection is part of which step of speciation
different species
the finches of the Galapagos Islands can no longer interbreed. this means that they have
new canon, mountain range, or lakes
which of the following would cause a population to become separated
survive
Organisms with traits well suited to the environment will
human embryos and animal embryos have vertebrates that are similur. This is evidence that all vertibrates sheare a common ancestor
compare the embryonic structures below and anser the questions that follow