Answer: Excretory
Explanation: My grandpa went through this recently and I had to learn all about it. :(
I would say that it would be C, Relationships of trees to other organisms in the rain forest...
The stem cells will divide through mitosis to create diploid stem cells.
What we see can send panic signals to our endocrine system and then have an effect on systems from there. and also if we see something we are scared of it can stop our breathing, make us scream, close our eyes and other things.
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.