Answer:
The mass number is 56
Explanation:
You just add the number of protons and neutrons to find the mass number of a atom.
The human reproductive system is regulated by the endocrine system.
Answer: Tay-Sachs a disease caused by an absence of an enzyme that break down fatty substance causing damaged to nerve cells
They use the algae in the water
Answer:
I can't see anything.
Explanation:
The image is there, but I can't zoom in. Tell me what it says and I'll help you from there! :)
