The surface layer of the water freezes solid creating a barrier that insulates the ice below so that it keeps a steady temperature usually a few degrees above freezing (32 degrees).
They pollinate plants, which saves farmers work. Insects such as bees and butterflies help to pollinate plants.
Endocrine system regulation slowly happens but produces long-lasting effects, whereas nervous system regulation quickly takes place with short-term effects.
Endocrine system can regulate many things in the body that control the metabolism. The effect shouldn't be instant, but it should be good for long term effect. Nervous system need a much faster reaction because it responsible for "fight or flight" reaction. A slow nervous system will cause the organism caught by predator easier.
Chromosomes carry genetic information of the organism
Genes transfer genetic information from parent to offspring
arisen by mutation, and found alongside chromosomes
