CH 15 Review Evolution

Disasters such as earthquakes, floods kill victims unselectively & alter allelic frequency.

Evolution of elephants is an example of ____.

Darwin studied _______ that had different beaks for different foods.

Species originate through gradual, slow change (EX-horse).

One ancestral species evolves into many species to fit diverse habitats (finches).

The _________of plants and animals that Darwin saw first suggested evolution to Darwin.

Occurs when members of similar populations no longer interbreed to produce fertile offspring.

Any variation that helps an organisms’ chance for survival.

Body parts do not have common evolutionary origin but have similar function.

Vertebrate embryos with similarities like tails and gill slits suggests _______.

Has unique species animals.

The fossil record is incomplete.

Distantly related organisms evolve similar traits.

Selection against both extremes, favoring average & reducing variation.

Enables one species to resemble another species.

Natural selection acts on variations which are controlled by ____.

Both homologous and analogous structures provide evidence all organisms have common ancestor.

Number of specific allele divided by Total number of alleles is ____.

When allelic frequencies remain constant, a population is in genetic equilibrium.

Both extremes are favored & leads to evolution of 2 species.

Having similar arrangement, or function, or both.

All the genes of a population..

Fossils,Anatomy,Embryology, Biochemistry,Geo. Distribution,Adaptations are ___ of evolution.

Speciation relatively quickly (10, 000 years) & long periods of no evolution (gene equilibrium)

Wallace had the same ideas about evolution as _______.

Mutations, genetic drift, gene flow, nonrandom mating, & natural selection cause changes in __.

Beautiful tail of mail peacocks makes the organism a greater target for predators showing ___.

When few individuals colonize an isolated area (Darwin’s finches).

Theory of Natural Selection ...

Fertilization is possible between a tiger and a lion but the offspring is sterile.

____ are a record of early life.

Evolution of one species affects the evolution of the other species (EX-mouth parts).

Evolution is intimately linked with climate and geological forces.

In sympatric speciation, a species evolves into a new species without _____.

Enables species to blend in with surroundings so that they are not easily found by predators.

Favors one extremen & can lead to rapid evolution.

Branch of science that studies the world distribution of organisms.

Natural selection acts on phenotypes. Organisms with ______ survive & pass on traits.

Islands, lava flows, rock slides, (allopatric speciation) lead to evolution of 2 species.

The theory of ___ is supported by natural selection and explains the diversity of life.

______ said the human species grows faster than food supply.

Evolution occurs as a population’s _______ & their frequencies change over time.

Biochemistry compares RNA, DNA, and ______ to provide evidence of evolution.

Considering the conditions of Hardy-Weinberg Principle, populations are usually in equilibrium.

Some mutations are helpful & new allele or gene becomes part of the population’s gene pool.

He had a job as naturalist on HMS Beagle.

The human appendix and little toe are examples of _______.

Populations NOT _________ evolve.

Genetic & behavioral differences between organisms lead to ___.

According to RNA evidence, there are ____ domains of organisms.