Answer:
The correct answer is statement A.
Explanation:
The procedure of purifying ocean water, that is, the saline water so that it can become suitable for drinking is termed as desalination. Almost 70 percent of the Earth is covered with water and of this only 3 percent is used for drinking purposes. On a huge scale, the process of desalination would require the boiling of water, which would eventually require an enormous amount of energy.
Reverse osmosis and electro-dialysis are the methods used for desalination. However, these procedures are very costly and cannot be performed on a huge level as it can affect the economy of various countries.
The correct options are as follows:
1. C
Homeostasis is the process by which living organisms maintains constant internal environment. Maintaining homeostasis is very important because the survival of the living organism depend on it. In order to maintain homeostasis, the amount of wastes, nutrients and water that is in an organism must be controlled and maintained at optimum level.
2. A.
An organism that can not maintain an homeostasis will die. This is because, lack of homeostasis will disrupt the biochemical reactions which sustains the life activities of the organism and once the biochemical reactions that produce life energy can no longer take place the organism will die.
3. A.
For both unicellular and multi cellular organisms, when they are exposed to water containing no salt, much of the water will move into their cells. This happened because, the level of salt in the interior of the living cells is higher and so the water will move from the medium which has no salt to the inside to the cell where there is salt. This process is known as osmosis. In osmosis water move through a semi permeable membrane from the region of low salt concentration level to the region of higher salt level concentration.
4. D.
Cells in living organisms are able to maintain homeostasis by specializing in specific functions and by working together in cooperatively. Each cell has its own functions which it performs; in the process of its duty, it communicates with other cells which also help it in order to achieve common goals, which is maintenance of homeostasis within the cell.
As estruturas morfológicas dos vírus HIV tipo 1 e 2 incluem proteínas estruturais e funcionais e um genoma de RNA protegidos pelo envelope viral. O envelope é constituído por uma bicamada lipídica e contém uma proteína complexa conhecida como env. Esta proteína é constituída pelas glicoproteínas gp41, transmembrana e gp120, Na face interior o HIV possui a proteína viral denominada p17 (matriz) e, envolvido por esta proteína, está o capsídeo composto pela p24. Na parte mais interna encontram-se os elementos mais importantes: dois filamentos simples de RNA, a proteína p7 (nucleocapsídeo) e três enzimas essenciais, p51 (transcriptase reversa), p11 (protease) e p31 (integrase). exposta à camada externa do envelope.
The only thing the cancers have in common is that they started from a breast tissue cell. They can be different cells that may have different genetic changes.