Question

14
what are the basic structural units of living organisms?
a nuclei
b cells
c organs
d tissues

Explanation:

The question asks for the basic structural units of living organisms. In biology (a subfield of Natural Science), cells are known to be the fundamental building blocks of all living things. Nuclei are parts of cells, tissues are groups of cells, and organs are made of tissues. So the correct option is B.

Answer:

B. cells