Answer:
a substituted derivative of purine, especially the bases adenine and guanine present in DNA.
a colorless crystalline compound with basic properties, forming uric acid on oxidation.
Answer:
Explanation:
The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. ... After ice melts into liquid water, you can refreeze it into solid ice if the temperature drops. Freezing and melting are physical changes.
The <span>nucleolus is located inside the Nucleus. </span>
A trilobite. Trilobites became extinct about 250 million years ago while a ammonite became extinct around the same time as dinosaurs(65 million years ago). You wouldn't find a human skull or a dinosaur footprint
