Environmental Science
The main reason why vegetables take longer to cook in boiling water at high altitudes is because:

There is less oxygen in the air at high altitude
Saturation vapor pressure decreases with increasing altitude
The temperature of the boiling water decreases with increasing altitude
Water boils at a higher temperature with higher altitude

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Environmental Science
The aurora is produced by:

Reflections of sunlight by polar ice fields
Scattering of sunlight in the upper atmosphere
Burning oxygen caused by the intense sunlight at high altitude
Fast-moving charged particles colliding with air molecules
The combination of molecular and atomic oxygen to form ozone

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Environmental Science
A term biotype means

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

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