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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


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


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


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


structures and behaviors for finding food, protection, and for moving from place to place are an organisms ____________to its environment


In order for the red-eyed tree frog to produce fertile offspring, it should mate with its own species, which is


scientists esstimate that Earth is 4.6 billion years old. this is plenty of time for


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


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


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


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

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