The statement which best explains why carbon is present in so many kinds of molecules is because <u>it can form four covalent bonds.
<em /></u>It isn't rare on Earth, so A is incorrect. It has valence electrons, so C is incorrect. It cannot become an ion, so D is incorrect.<u>
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I think the nurse should asses the blood pressure, skin color, and moisture. Sinus bradycardia may be defined as a sinus rhythm with resting heart rate of 60 beats per minute or less. However few patients become symptomatic until their heart rate drops to less than 50 beats per minute. Intervention for sinuses bradycardia should be based on assessment of the clients condition. The patient may remain asymptomatic, the nurse may choose to increase the IV flow rate, administer atropine, or notify the Rapid Response Team depending on the severity of the symptoms.
The correct option is A.
Living organisms depend on their environment to survive, when there are changes in the environment which are not favorable to the living organisms, it will eventually leads to the wiping out of the living organisms. As time goes on and the environment recover, the living organisms that will be found in the new environment are those who will be able to survive in it.
