Environmental Science
The most important reason why summers in the Southern Hemisphere are not warmer than summers in the Northern Hemisphere is that:

The earth is farther from the sun in July
The sun's energy is less intense in the Southern Hemisphere
Over 80% of the Southern Hemisphere is covered with water
The earth is closer to the sun in January

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Environmental Science
During the winter solstice in the Northern Hemisphere:

All of these
At middle latitudes in the Northern Hemisphere, this marks the longest night of the year
Astronomical winter begins in the Northern Hemisphere
The noon sun is overhead at 23.5o S latitude

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Environmental Science
Lead poisoning

increases O2 carrying capacity of myoglobin in muscles
increases O2 carrying capacity of hemoglobin in blood
reduces O2 carrying capacity of hemoglobin in blood
reduces O2 carrying capacity of myoglobin in muscles

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Environmental Science
Fungi is/are

heterotrophic eukaryotes
single-celled prokaryotes
Phototrophic eukaryotes
Eukaryotes single-celled and primitive multi-celled organisms

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