<span>The challenge of reproducing is one of important manners which distinguishes migratory birds from another birds. The question is that which examples descrbe such manners, and for that, we can choose A, C and D</span>
Answer:
★ A nonrenewable resource that developed from the remains of ancient plants that lived in large swamps millions of years ago is COAL
Explanation:
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Answer: The study of plant varieties.
Explanation:
This question relates to the studies that Gregor Mendel, founder of modern genetics, performed at the University of Vienna.
Experimenting on pea plants, Gregor Mendel was able to establish a lot of the rules of heredity that we know today even though his research was not fully appreciated or understood during his own life.
He credited the study of plant varieties to have been most crucial to his final analysis because farmers had been crossbreeding varieties for millennia to bring about better traits in plants.
Answer – The Tide
The regular rising and falling of ocean water due to the gravitational pull of the Sun and Moon is known as the ocean tide. Primarily, it is the moon that is chiefly responsible for the rising and falling of ocean water; the gravity of the sun only reinforces the moon's gravity.