B
Explanation
Sodium Fluoride
Because they want to know the existence of aliens
Answer:
infectious disease is a disease that can be spread from one person to another by the means of touching,kissing,coughing,sneezing ect ect.
but non infectious diseases r diseases that don not spread from one person to another. for eg: cancer bla bla bla.
please mark me as brainlist as i have written this from my own head and also i have science exam on tuesday
PEACE OUT
Plants maintain homeostasis by keeping their stomata open just enough to allow photosynthesis to take place but not so much that they lose an excessive amount of water.
When plant cells use the food they make, the cells respire, taking in oxygen and giving off carbon dioxide.
- Hope this helps
