The answer is, <span>It is important to protect the water, land, and air resources because they are the foundation of all life on Earth.</span>
When two protein chains combine to form an active protein, the structural level is quaternary.
<h3>What is a quaternary structure?</h3>
The quaternary and tertiary structure of a protein is the tridimensional shape of the protein, which involves protein domains.
The quaternary protein structure refers to the different arrangements generated by different protein subunits.
The primary structure of a protein involves its amino acid sequence, whereas the second structure involves protein chains.
Learn more about quaternary structure here:
brainly.com/question/5286438
Answer: light is a eletromagnetic wave, no it does not need a medium
Explanation:
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The spinal cavity ,is enclosed within the vertebral foramen of the vertebrae
Answer:
Answer is D. Tension
Explanation:
Tension headache is a type of headache that can be described as feeling of dull or moderate pain in the head, which can be inform of a tightness around the head and the neck.Tension headache is also known as stress headache.
It has been discovered that, various activities like driving for a long period of time, staring to a computer for a long period and exposure to cold temperature, can cause tension headache.
The following activities can be developed to reduce or avoid tension headache.
* Drinking a lot of water.
* Regular exercise.
* Sleeping very well
* Limiting stress
* Eating foods like almond and walnut.
In this case, the complaint of a 'pressure' type headache to the back of the head and neck by the man, was a typical feeling ,synonymous to tension headache.
