Answer: carbon dioxide
Explanation:
A chemical substance is a form of matter having constant chemical composition and characteristic properties.[1][2] Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.[3] Chemical substances can be simple substances[4], chemical compounds, or alloys. Chemical elements may or may not be included in the definition, depending on expert viewpoint.[4]
Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical.
Glycolipids are fats. Lipids are fats and glycoprotiens has to do with protien and is made up of amino acids
Answer:
Reticular activating system.
Explanation:
Reticular activating system may be defined as the system containing different nerves stimulation and located in the mesopons. This system interacts with thalamocortical systems and basal forebrain.
The reticular activating system is involved in the resting sleep, dreaming and asleep. The sound of a particular object or living organism play important role in the reticular activating system. The individuals asleep and waking and its regulation is controlled by this system of nervous system.
Thus, the correct answer is reticular activating system.
Answer: separating water from nitrogenous wastes
by passive diffusion.
<span>Passive diffusion happens usually in the primary
filtering unit of the kidneys called nephrons. Water molecules along with salts,
urea and glucose diffuse through the more minute parts of the kidney as part of
the waste filtration process of the urinary system. </span>
