A. They exchange gases with the enviroment
Good luck
The correct option is C, PROTEINS.
Protein are macro molecules which are made up of units called amino acids. There are twenty different amino acids, each with a unique R group. The elements find in protein include carbon, oxygen, nitrogen, etc. Nitrogen is one of the most important constituent of proteins. <span />
The correct answer is option A, that is, a ratio of 1 carbon atom to 2 hydrogen atoms to 1 oxygen atom.
Carbohydrates are the main source of diet, they provide energy to the body, mainly via glucose, a basic sugar, which is a part of the starch and an ingredient in various staple foods.
The carbohydrates can be signified by the stoichiometric formula, that is, (CH2O)n. It can be also be stated that the ratio of the carbon to hydrogen to oxygen is 1: 2: 1 in the molecules of carbohydrates. Carbohydrates are further categorized into three sub-kinds, that is, monosaccharides, disaccharides, and polysaccharides. The monosaccharides are the simple sugars, for example, glucose.
Answer:
B). It will leave the next day.
Explanation:
The poem 'Raven' penned by Edgar Allan Poe explores the theme of regret, mental uncertainty, death, and lost love. In the given excerpt, the speaker asserts that 'On the morrow, he will leave me' for the Raven and becomes completely despaired. He becomes completely dejected thinking that 'tomorrow Raven will also leave(die)' like the 'other friends of him along with his hopes have flown(died) before.'
The speaker longed to see his love 'Lenore' in heaven again but this 'nevermore' from the bird makes him accept that the Raven(sense of loss and grief) will stay with him forever. Thus, <u>option B</u> is the correct answer.
<span>A failure of homeostasis -- the balance of essential physiological states -- means disaster for the organism. Failure to maintain body temperature leads to hypothermia or heatstroke. Failure to maintain energy balance can result in obesity and diabetes. Failure to maintain calcium balance in the blood leads to hypocalcemia or hypercalcemia. Failure to maintain water balance results in dehydration or hyperhydration. </span>
