Question

which of the following correctly places the levels of organization in order?

a cells - tissues - organs - organ systems - organism

b tissues - organs - cells - organism - organ system

c cells - tissues - organ systems - organs - organism

d tissues - cells - organs - organism - organ systems

Explanation:

In biology, the levels of organization from simplest to most complex are cells, which group together to form tissues. Tissues then form organs, organs work together in organ - systems, and organ - systems make up an organism.

Answer:

A. cells → tissues → organs → organ systems → organism