Answer:
a
Explanation:
After Columbus’ arrival in the Americas, the animal, plant, and bacterial life of these two worlds began to mix. This process, first studied comprehensively by American historian Alfred Crosby, was called the Columbian Exchange. By reuniting formerly biologically distinct land masses, the Columbian Exchange had dramatic and lasting effects on the world. New diseases were introduced to American populations that had no prior experience of them. The results were devastating. These populations also were introduced to new weeds and pests, livestock, and pets. New food and fiber crops were introduced to Eurasia and Africa, improving diets and fomenting trade there. In addition, the Columbian Exchange vastly expanded the scope of production of some popular drugs, bringing the pleasures — and consequences — of coffee, sugar, and tobacco use to many millions of people. The results of this exchange recast the biology of both regions and altered the history of the world.
<span>Having been previously tricked by the promises of a democratic government and republic in the past, the writers of the Constitution were hesitant in the beliefs and issues this would bring forth, despite their avid and colorful backgrounds in understanding political and philosophical thoughts.</span>
<span>So your data reflects changes in your dependent variable only; Imagine an experiment where we don't control the control variables.
Hope this helps!
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Answer:
The reason? Venus' thick, carbon dioxide atmosphere causes a runaway greenhouse effect. At the surface Venus has an atmosphere 50 times denser than Earth's, and average surface temperatures of 470 degrees Celsius (878 degrees Fahrenheit)—hot enough to melt lead.
Explanation:
Answer:
B
Explanation:
Divers who dive at any time from sunset to sunrise must carry a diver's light visible when above the water for a distance of 150 feet.
