Multiple Choice
The greenhouse effect is
A) due to increased sunlight in recent years.
B) caused by increased plant life and photosynthesis.
C) a natural phenomenon due to absorption of sunlight and re-radiating of the heat.
D) a manmade hazard due to decreased levels of carbon dioxide and ozone in the atmosphere in recent years.
E) not affected by human activities.
Correct Answer:
Verified
Correct Answer:
Verified
Q17: Which of the following is usually a
Q20: Humans are biologically adapted to be<br>A) omnivores.<br>B)
Q21: When settlers move into a wooded area,
Q30: Settlers move into an area and harvest
Q51: Once a nutrient enters an ecosystem, it<br>A)
Q58: Energy flow in an ecosystem begins with<br>A)
Q61: Atmospheric CO<sub>2</sub> combines with water to produce
Q63: Energy flow in an ecosystem is NOT
Q69: Which is NOT true about a complex
Q70: In a grazing food chain,<br>A)all the consumers