It is a machine used to map the ocean floor might be located on a ship or might rely on a sonar to map the ocean floor features
Answer:
unicellular life first
Explanation:
it arose billions of years ago while multicellular life forms around at least 600 million years ago
Its true that the cerebral cortex is the highest portion of the brain.
Answer:
Explanation:
friction between two rock surfaces grinding away minerals.
