The vocabulary is difficult.
The anatomical structures (dorsal, ventral) are not always easy to determine.
Some of the pictures did not show all aspects or key features of the organism.
Some specimens were very similar.
There were lots of questions and it seemed to take a long time to narrow them down.
Biology is the natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution.
2260 joules are required to evaporate 1 gram of boiling water
They are eukaryotic, which means they have a nucleus.
Most have mitochondria.
They can be parasites.
They all prefer aquatic or moist environments.
