Choose the best answer:
Ramu and Felix visited a leech bio pharm, and they met a biologist who is in charge of that area. After visiting the farm, they asked some questions.
Important!
Note: The questions are as follows. The answer given by the biologist is among the options. Please select the correct answer.
1. Why do you keep leeches inside the boxes and also in water? Are they two types of leeches?
2. Do they have a heart? If not, which part of the circulatory system does the function of the heart?