Pheromones, mostly.
pheromones .
Animals such as fireflies contain two chemicals, luciferin and luficerase. When combined with oxygen, they give off light.
Testes produce sperm cells in male animals in addition to hormones and other useful chemicals.
Generally, businesses working with plastics, metals and/or dyes produce waste that is hazardous to our health and the general health of the outside environment and its inhabitants. The chemicals and fumes from melting plastics and things used to finish metals produce chemicals. Even the factories which make machines and gadgets produce smoke. Run-off chemicals and dyes poison animals, bodies of water, fish and the air. Obviously, factories in the nuclear business produce residual chemicals. :(
All animals are affected by toxic chemicals.
All bacteria produce chemicals. Could you possibly be more specific?
yes! fungi produce chemicals that digest plant remains.
Yes, and also from the natural breakdown of plants and animals. Plants and animals break down into nutrients (chemicals) which plants can use to produce new growth.
Chemicals for chemical nuclear warfare
They produce chemicals to fight infection and later produce chemicals to "turn off" the immune system.
What fruit or vegetable will produce the most electricity
hormones