Question

1. which list shows the levels of organization in a complex organism, starting from the simplest level? a. cell → organ → tissue → organ system → organism b. cell → tissue → organ → organ system → organism c. organism → organ system → organ → cell → tissue d. organism → organ → tissue → organ system → cell

Explanation:

In a complex organism, the levels of organization from simplest to most complex are cells, which group together to form tissues. Tissues then combine to create organs. Organs work in sets called organ - systems, and organ - systems make up the organism.

Answer:

A. cell → tissue → organ → organ system → organism