The basic units that are put together over and over to build a strand of dna are called as nucleotides.
<u>Explanation:</u>
DNA is a heteropolymer that involves many monomers that is the nucleotides that are joined together by phosphodiester bonds in order to develop a complete DNA. The nucleotides consists of nitrogenous bases, phosphate groups and the sugar molecules that are bound together to form a complete nucleotide. The phosphate groups form a backbone through which the nucleotides are joined together.
The chemical originally contained in aerosol propellants that is thought to have contributed to the depletion of the ozone layer is the chlorofluorocarbons or the CFCs. These are nonflammable and nontoxic substances that has carbon, chlorine and fluorine in their structure. These substances are used as propellants, solvents and as refrigerants. However, it was found from researches that these substances would contribute to the depletion of the ozone layer in the atmosphere which is why under the Montreal Protocol, the use of these are banned and other alternatives are being used now in replace with the CFC. One alternative used is the <span>hydrofluorocarbons.</span>
Answer:
The correct answer is option B) "Neurologic involvement".
Explanation:
The disease of pernicious anemia could elicit neurologic symptoms that comes from a patient that suffered myelin degeneration and loss of nerve fibers. The neurologic symptoms include numbness and tingling in the arms and legs as well as paresthesias, weakness, clumsiness, and an unsteady gait. When a patient suffers with any of these symptoms is considered that she or he has pernicious anemia with a neurologic involvement.
<span>Many animals raise their youngs in packs. A prime example of this is seen in lion families. Many females work together to take care of the young cubs collectively. This allows other females to hunt for food, while also ensuring greater protection for the cubs from potential predators, since there are more adult lions around.</span>
