Scientist study index fossils so they will get an understanding of what life was like back then.
<span>Answer:
Careful observation can lead to consolations even though the underlining reason or mechanism behind the phenomenon is unknown</span>
Answer:
their nuclear material is naked not membrane bound
The correct answer is (d.) proteins. Higher organisms use nitrogen to make their protein. Food that is containing protein also involves nitrogen in it. Protein also has amino acids that contain nitrogen in it which is a necessary essential nutrient for the body.
