What group includes infectious germs, and purifies water by breaking down wastes, decomposes organic wastes into nutrients, and provides much of the world's oxygen?
A. carnivores
B. autotrophs
C. abiotics
D. microbes
E. herbivores
Answer: D
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Allopatric speciation occurs when organisms inherit two different alleles
a. True b. False
Instructions: Choose one answer from each pair of selections. The nuclear winter scenario envisions an upper level layer of strongly REFLECTING | ABSORBING soot particles, which would cool Earth's surface by reducing the amount of sunlight able to reach the ground
Two inland cities are located at the same latitude and within 50 km of each other. City A has an annual mean that is 12°C lower than City B. What control is the most likely cause for the much lower annual mean at City A?
What will be an ideal response?
Geothermal energy is ________
A) energy originating from the sun and slowly released from Earth's core B) only able to be used during the day C) geographically limited D) intermittent E) based on nuclear reactions in the Earth's core