Environmental Science
A population is a group of

individuals in a species
individuals in a family
communities in an ecosystem
species in a community

ANSWER DOWNLOAD EXAMIANS APP

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:

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

ANSWER DOWNLOAD EXAMIANS APP