Answer:
The correct answer is option A. "The contents of blood come into closer contact with tissues in a closed system than an open system".
Explanation:
In a closed circulatory system, the blood has an specific path, circulating from arteries to veins and to smaller blood vessels throughout the body. This is in contrast with open circulatory systems at which the blood is not contained in arteries or veins but it suffuses the body. A closed circulatory system have many advantages over open circulatory system, however in a closed circulatory system the contents of blood are not into closer contact with tissues in than an open system. Actually, in an open circulatory system the blood is in closer contact with tissues.
The smooth endoplasmic reticulum functions in many metabolic processes. It synthesizes lipids, phospholipids as in plasma membranes, and steroids.
Answer: desert .
_________________________________
Mitochondria, plastids and chloroplast all are surrounded by a double membrane
Answer:
They form crystals
They have high melting points and high boiling points
They have higher enthalpies of fusion and vaporization than molecular compounds
They're hard and brittle
They conduct electricity when they are dissolved in water
They're good insulators
Explanation:
i hope this is what you need