<span>The significance of chitin in arthropods is Chitin is a structural carbohydrate that forms their exoskeleton. </span>
Increased in pitch (frequency). It's the doppler effect.
Answer:
The process responsible for producing most of the Earth's oxygen is known as photosynthesis
Explanation:
In this process, plants and certain other organisms convert sunlight into oxygen and other products.
There are in us. other living thing depends on there own
They all begin with corda , gill. Than they develop
