The answer is <span>non-biodegradable and subject to bioaccumulation and/or bioamplification.
DDT (dichlorodiphenyltrichloroethane) is persistent, non-degradable insecticide and organic pollutant readily accumulated to soils and consequently affects organisms.
DDE (</span><span>dichlorodiphenyldichloroethylene) is non-degradable pesticide toxic to birds at the first place.
PCBs (polychlorinated biphenyls) are non-degradable organic compounds very toxic to the environment.
PBDEs (polybrominated diphenyl ethers) are non-degradable compounds very toxic to environment, even able to affect brains of animals in the development period.</span>
The proton has a positive charge.
To know if an equation is balanced you need to check and see how much of each molecule is on either side of the arrow. Right now you have 1-Ca, 2-H, 2-Cl on the left side of the arrow and 1-Ca, 2-Cl, and 2-H on the right side too. Because all the molecules are equal on both sides this means that the equation is balanced. So in front of the CaCl2 there is an assumed coefficient of 1. The answer is 1.
Even though the process is endothermic, snow can sublime.
The tendency in nature that accounts for this phase change is that there is a
tendency toward greater entropy. The answer is number 1. The rest of the
choices do not answer the question above.
In order to understand why the laws of inheritance work as they do, scientists had to look into the interior of cells. Cells are the building blocks of life, and all living things—from bacteria to human beings—are composed of them. The number of cells varies greatly from organism to organism: A bacterium has just one cell; an average-sized adult human has between 60 trillion and 100 trillion. Most cells are too small to be seen with the naked eye and must be viewed under a microscope. In the human body, almost all cells vary between <span>1 </span><span>⁄25,000 of an inch and </span><span>1 </span>⁄125,000 of an inch in diameter, although there is a nerve cell in the upper leg that, while extremely thin, is several feet long. Other cells are larger. A hen's egg, for example, is a single cell, and the largest cell of any organism on Earth is the ostrich egg, which weighs about a pound. Even the smallest cell contains a complete copy of the genetic information that gives an individual organism the traits that make it what it is and not some other thing. Cells have what are called life cycles. They are created, live, reproduce, and die. It is during the process of reproduction, or cell division, that genetic information is passed along from generation to generation.<span>
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