Answer to Question 1
Answer: Primary forests are those that have not been substantially disturbed by humans. Humans have heavily exploited forests for wood products and wood to burn. The pattern of primary forests is one of places of little human population.
Answer to Question 2
Answer: The Nearctic Region consists of the non-tropic parts of North America. It is a relatively poor assemblage compared to other regions and is transitional between Palearctic and Neotropical realms. There is close similarity between Nearctic and Palearctic species because of the Bering land bridge.
The greenhouse effect: heat trapping by earth's atmosphere.
Temperature Profile of Earth’s Atmosphere
Tides on Earth
One Module of the Primary Visual Cortex
Earth Science, 14/E
When viewed from the Earth, Venus subtends an angle of about 1 arcminute (1/60°) when it is at ...