The answer would be mitochondria.
Generating heat requires energy, and energy is produced with mitochondria.
Answer:
one is adopted and one is the child from the mother's previous marriage.
Explanation:
Most likely, the correct answer is:
D. Hummingbirds with shorter or longer beaks can feed from one of the available orchids, but hummingbirds with intermediate beak lengths cannot feed from either.
The length of a hummingbird's beak vary depending on its food, but it is usually longer than hummingbirds' bodies. The length is useful for reaching deep into blossoms to lap up nectar.
The particles of the snow have kinetic energy, but being a solid, it has less kinetic energy than that of liquid water. So they move around in a place about its mean position.
Option C
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Igloos are the small homes made up of snow. It used to be homes for the people living in Arctic regions in past. Now some tribes still live in these igloos, or they are made by tourists for amusements.
Snow is basically precipitation of ice from clouds. Being the solid form of water, ice has molecules more compactly arranged in its crystal structure. Thus, the molecules cannot move here and there like in fluid. But having some kinetic energy, they have certain movements i.e vibrations around its mean position.
