Answer:
A shark is not a mammal.
Explanation:
Mammals are a classification of animals that are famously known for breathing oxygen/air, having fur/hair, mammary glands (which are responsible for the females' ability to produce milk for their young), and (usually) the live birth of their offspring.
Giraffes, dogs, and whales all have the qualities mentioned above. Sharks, however, do not.
Sharks are fish. Unlike the whale, which must go to the surface to breathe the necessary oxygen, sharks have gills. This possession of gills, and not lungs, allows them to breathe only underwater.
Since sharks can't breathe oxygen like mammals can, they are therefore not mammals.
Answer:B
Explanation:
Christopher Columbus introduced horses, sugar plants, and disease to the New World, while facilitating the introduction of New World commodities like sugar, tobacco, chocolate, and potatoes to the Old World. The process by which commodities, people, and diseases crossed the Atlantic is known as the Columbian Exchange.
Answer: Following the assassination of Franz Ferdinand, Austria Hungary was hella mad about it, so they went to Germany, and was like hey, help us get revenge on Serbia. So the two of them teamed up and declared war on Serbia on July 28th. Shortly after (a couple of days) Germany declares war on Russia, and then after Serbia's ally invaded France, that pushed Great Britain to declare war on Germany.
(hope this helps)
