Answer:
RNA-Ribonucliec acid
Explanation:
RNA is a chromosome is a darkly stained structure present in the cell which carries the genetic information of the organism.
The chromosome is a condensed or packaged form of the structure formed by the condensation of a thread-like structure called chromatin which attaches at a point and gives X shaped appearance to the chromosome. This packaging is necessary for the cell as it helps transfer the long sequence of DNA during cell division.
The RNA is composed of the DNA which acts as the genetic material of the cell and the proteins which help bind the DNA in a tightly folded manner.
Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:

The red blood cells have proteins, hemoglobin and myoglobin, that are responsible for the storage of oxygen from the lungs and transporting it through the body. When the hemoglobin and myoglobin are low, it is because the iron levels are low. When this occurs, the blood, which carries the oxygen, reduces the ability to process its work. When this occurs, anemia, a condition that may cause chest pain, tiredness, and headaches.
Your answer is d. delayed puberty