how the polarity of Earth’s magnetic field is recorded in the sea-floor

the lava the extrudes from mid-ocean ridges

Explanation:

the lava will turn into rock that becomes magnetized and acquires the magnetic polarity that existed when the lava cooled. This process continues repeatedly and is a form of record of the Earth's changing magnetic polarity.

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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i thinking chemical change