Answer:
Haemoglobin (Hb) is a protein present in red blood cells that transports oxygen and gives blood its dark/vivid red color. The amount of haemoglobin in the blood varies from person to person. Men's levels are often greater than women's. This is scientifically proven however, it is often but not all the time.
The six most common elements inliving things are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. Atoms of these elementscombine and form thousands of large molecules. These large molecules make up the structures of cells and carry out many processes essential to life.
Answer: B. on the surfaces of organs, on the walls of cavities, on the outer surface of the body, and in glands of the body.
Explanation:
The epithelial tissues are the tissues that are present throughout the parts of the body. They form the covering of the body surfaces. It helps in lining the body cavities and organs. It forms the major tissues of the glands.
These tissues are important as they perform diversity of functions in the body. Such as protection, absorption, secretion, filtration, excretion, sensory reception and diffusion.
answer:
earth's average temperature would be near 0°F (or -18°C)
explanation:
greenhouse gases in the air, mainly carbon dioxide, methane, and water vapor, trap radiation from the Sun and act as a thermal blanket around the planet. without the greenhouse effect, earth would have an average temperature of -18 °C and be covered in ice. life as we know it would not be able to survive.
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