All cells share four common components: (1) a plasma membrane, an outer covering that separates the cell’s interior from its surrounding environment; (2) cytoplasm, consisting of a jelly-like region within the cell in which other cellular components are found; (3) DNA, the genetic material of the cell; and (4) ribosomes, particles that synthesize proteins. However, prokaryotes differ from eukaryotic cells in several ways.
Answer:
Aerobics is a type of physical activity that combines rhythmic aerobic exercise with stretching and strength training exercises to improve overall fitness.
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Answer:
D. Useless
Explanation:
According to Dictionary.com, “in vain” is defined as “without real significance, value, or importance; baseless or worthless.”
Answer: B.
Explanation:
The thermosphere is most directly affected by the Sun’s radiation.
Answer:
Oldest Rocks on Earth Found. The Nuvvuagittuq Belt on the coast of the Hudson Bay in Northern Quebec. Scientists have found the oldest known rocks on Earth. They are 4.28 billion years old, making them 250 million years more ancient than any previously discovered rocks.
Explanation:
