evhOELUTION

which species was best adapted for survival in changing environmental conditions

E

directional selection ******

Form of natural selection in which the entire curve moves

which species are least likely to be vital parts of a present day environment

H and J

a population of white moths lives in a forest near a factory. this factory burns coal and pollutes the air with black dust. over time, this dust has settled on the trees in the area, making them darker. this could result in

a decrease of the white moth population

which characteristics of a population would most likely indicate the lowest potential for evolutinary change in that population

asexual reproduction and few mutations

when a particular white moth lands on a white birch tree, its color has a high adaptive value. if the birch trees become covered with black sot caused by air pollution, the white color of this particular moth in this environment would mostlikely

decrease in adaptive value

the fossil record of ancient life forms provides scientific evidence of

evolutionary changes

the crucian carp, a Scandinavian fish, thrives in shallow ponds that freeze ove during winter. while other creatures in the pond die from lack of oxygen, these carp are able to obtain energy through a biochemical pathway that does not require oxygen. this characteristic is an example of

favorable adaptive trait that has led to an increased survival

according to the heterotroph hypothesis, what is the proper order of life on earth?****

heterotrophs-autotrophs-oxygen-arobic respiration

similar structures but different functions

homologous structures

fossils of trilobites allow the relative dating of rocks within a narrow time span. trilobites are examples of

index fossils

the fossils found in layer B resemble the fossils found in layer A, this similarity suggests that

modern forms of life may have evolved from earlier forms of life

by which biological process did the insect initially develop a resistance to the insecticide

mutations

Studies of finches in the Galapagos islands show

natural selection occurs when there are scarce rescources and intense compitition

which statement is most closely related to the modern theory of evolution?

organisms best adapted to a changing environment are more likely to reproduce and pass their genes to offspring

earths primitive atmosphere consisted of all but this

oxygen

which statement best illustrates a rapid biological adaptation that has actually occured

pesticide-resistant insects exist in certain environments

domestic horses have a greater diversity of coat colors than that of wild horses. the process that led to a greater variations of coat colors in domestic horses is

random mutations

the type of dating shown is

relative dating

in order for a species to evolve, it must be able to

reproduce successfully

which situation would most likely result in the highest rate of natural selection?

reproduction of organisms exhibiting genetic differences due to mutations and genetic recombinations in a changing environment

evidence that best supports the theory of biological evolution was obtained from the

study of fossil records

speciation occurs when the variations of a population are so great from other populations

that they can no longer interbreed

examination of ancient rock layers at a certain location revels many different fossils. which conclusion can be drawn concerning the species that formed these fossils?

they had many variations due to mutations

of the six main points of Darwin's theory of natural selection, which one couldn't darwin explain?

variation

the appendix is an example of what kind of structure

vestigial