1. Rewrite the following so that they read from left to right in increasing order of organisation.
Tissue, macromolecule, population, organism, organelle, atom
2. How do connective tissue cells differ from nerve cells?
3. Which answer BEST describes an 'organ system'?
a) A group of organs that look similar to each other
b) A group of organs that have blood running through them
c) A group of organs that work together to perform a specific function
d) A group of organs that is located in the same region of the body.