A. Cell
B. Tissues
C. Guanine
D.chloride
🧠 Explanation:
Cells are the basic building blocks of plants and animals, forming tissues and organs through specialized structures. Discovered by Robert Hooke, cells perform vital functions like respiration and reproduction, studied in biology. They vary in type, like nerve or leaf cells, driving life processes. Understanding cells is key in medical and biological sciences, informing research on health, genetics, and evolution, a fundamental topic highlighting the microscopic foundation of life and its applications in medicine and biotechnology.
