Component of bones and found in cell membranes

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

What are the necessary conditions for fusion?