Environmental Science
Mycorrhiza represents

Parasitic association between a fungus and an alga
Symbiotic association between a fungus and liverworts
Symbiotic association between a fungus and roots of higher plants
Parasitic association between a fungus and roots of plants

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:

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

ANSWER DOWNLOAD EXAMIANS APP