Biodiversity and Evolution

All are causes of animal and plant extinction except______.

• over grazing

• experimental for research

• deforestation and glaciation

• pollen particulates as air pollutant

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Which category of land use is increasing most rapidly that contributes plant and animal extinction?

• urbanization

• wildlife habitat destruction

• loss of agriculture lands

• increased amount of pollution

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Which category of land use is increasing most rapidly that contributes to plant and animal extinction

• Variation of members of a species

• Gene flow

• Variation within a species

• genetic traits

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A technique to determine the age of fossilized organisms.

• Radioisotope dating

• Carbon dating

• ionization process

• potassium iodine process

What type of evidence when there is a similar appendages

• Embryology

• vestigial

• homologous

• genetics

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Geographic isolation is _____.

• a part of allopatric speciation

• a part of sympatric speciation

• required for species recognition

• all of these are correct

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Population A varies slightly from population B. A taxonomist should designate them as separate species if _______.

• they are geography isolated

• they differ in appearance

• they do not interbreed when the opportunity arises

• gene flow has been observed

Selection is obvious when certain members of species_____.

• reproduce more than others

• grow long necks to reach food

• need not work as hard

• become prettier

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Mutation are _________.

• the sole source of variation in asexually reproducing organisms

• the ultimate source of variation in sexually reproducing organisms

• both genetic and chromosomal in nature

• All of these are correct

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How is genetic drift like natural selection?

• They both depend upon the founder effect.

• Both usually bring about adaptation to the environment.

• They both cause gene frequency changes.

• All of these are correct.

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