Answer:
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Artificial Selection.
Natural selection progresses slowly & would take generations to complete while artificial selection may complete within days or weeks. This is because Natural selection is not as controlled as artificial selection.
The answer is Ivory.
Made from the teeth and tusks of large mammals, most frequently elephants,<u> ivory </u>is extremely rare to come by today
What is ivory?
Ivory is a tough, white substance made up of the tusks and teeth of animals, generally those of elephants. Dentine, one among the physical components of teeth and tusks, makes up the bulk of ivory.
No of the origin species, the teeth and tusks of mammals have the identical chemical makeup.
The term "ivory" are often used to refer to any mammalian teeth or tusks of commercial importance that are large enough to be carved or scrimshawed because the trade in some teeth and tusks other than elephant's is well established and ubiquitous.
In addition to natural ivory, synthetic ivory also can be made, therefore it's not necessary to remove the substance from animals (unlike natural ivory). Tagua nuts are often carved to resemble ivory as well.
To learn more about ivory :
brainly.com/question/14383426
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Answer:
16 KJ or 16,720 J energy has gained by the water.
Explanation:
<em>Given data:</em>
Mass of water = m = 100 g
Temperature difference = ΔT= (60 - 20)∘C
specific heat of water 1 calorie = c = 4.18 J
<em>To find:</em>
Heat absorbed by water = q=?
<em>Formula:</em>
q = m . c . ΔT
<em>Solution:</em>
q = (100 g) x (4.18J/g ∘C) x (60 - 20)∘C
= 16,720 J
