Answer:
15 B
16 C
17 B
18 A
Explanation:
In my opinion these are 100 percent sure answer
The sugar and phosphate portion of the nucleotides are found "<em><u>as segments of the rails</u></em>" on the DNA twisted ladder.
The diseases associated with the respiratory system include asthma, chronic obstructive pulmonary disease (COPD), lung cancer, etc.
<h3>What are respiratory diseases?</h3>
Respiratory diseases are different types of conditions/disorders that affect our respiratory airways.
These types of diseases (respiratory diseases) hamper our ability to take oxygen from the air.
In conclusion, The diseases associated with the respiratory system include asthma, chronic obstructive pulmonary disease (COPD), lung cancer, etc.
Learn more about respiratory diseases here:
brainly.com/question/2152557
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