Answer:
The given statement is True.
A human body is composed of around 60 percent of water, the average range is around 50-65 percent.
Water is a vital nutrient for any living organism including human beings.
Being a universal solvent, it primarily helps in metabolism and transportation of proteins and carbohydrates in our body.
It helps in maintaining the internal body temperature through respiration and sweating.
It helps in excretion of waste material through urination.
It lubricates joints and acts as shock absorbent for the fetus, spinal cord, and brain.
The 3rd,4th, and 5th are correct.
The double membrane. It's theorized that chloroplasts used to be their own single-celled organism in the environment (and therefore with its own membrane). Then, the theory states, a larger cell took in the chloroplast by endocytosis, which involves surrounding the chloroplast in the large cell's own membrane. The chloroplast would then have two membranes surrounding it. This is similar to the thinking for mitochondria becoming an organelle as well. Hope this helps! :)
