Exocrine
These cells contain granules that contain substances that make blood vessels leaky, and another substance that assists in blood clotting.
bromine combines with aluminum to produce AlBr3.
You are wrong! The digestive system produce enzymes and other substances!!!
These substances are called products in English.
No - most ferns contain toxic substances and contain very little nutrition because as simple plants they do not store much food in their tissues. An exception are the "fiddleheads" - first leaves that some ferns sprout in the spring and which some people eat. They which are bitter (contain some chemicals) but are still edible as they have not yet grown enough to produce more of the substances.
nerve cell produce protiens
No, strong acids do not contain hydroxide ions. Strong acids are substances that completely dissociate in water to produce hydronium ions (H3O+) and anions. Hydroxide ions (OH-) are found in strong bases, not strong acids.
Plants are multicellular organs with either rigid or flexible cell walls. The cell walls contain cellulose as well. They produce their own food from organic substances nearby.
As far as I'm aware the molecules of all vitamins contain carbon atoms, so they are all 'organic' in the chemical sense of the term.
compounds (:
by the motion of molecules in a substances