Environmental Science
A term biotype means

all individual with different phenotype
all individuals with different genotype
all individuals having same phenotype
all individuals having same genotype

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Environmental Science
Ecology is

The study of the environment in the absence of humans
Integrates both social and natural sciences to help us understand how the earth works,
The science that studies the evolution of life,
The study of the relationships between organisms and their environment

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Environmental Science
Much of Tibet lies at altitudes over 18,000 feet where the pressure is about 500 mb. At such altitudes, the Tibetans are above roughly:

75% of the air molecules in the atmosphere
25% of the air molecules in the atmosphere
50% of the air molecules in the atmosphere
10% of the air molecules in the atmosphere

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