Earth's crust is made of rock, and rock is made of natural substances called minerals. There are three main types of rock: sedimentary, igneous, and metamorphic rock. Each type is produced in different ways. The oldest rocks on Earth were formed about 3.8 billion years ago.
Answer: a membrane containing a larger proportion of unsaturated fatty acids
Explanation:
I believe it's the body area examination, since a 'back' isn't and organ
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Body's major metabolic hormone is called Thyroid hormone
Answer:
Facilitated transport proteins
Explanation:
Large molecules such as glucose or carbohydrates use proteins to help break down cell membranes. Some membrane proteins with chains of carbohydrates are attached to help cells become acquainted with certain molecules.
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