The mouth is the beginning of the digestive tract; and, in fact, digestive starts here when taking the first bite of food
Cacti and other succulents can adapt to dry climates. They are able to store water in their leaves, while others store water in the roots or trunks. The waxy cuticle helps prevent water loss.
I can’t see the image but CO2 is produced in the mitochondria during respiration
The mitochondria looks like this:
Centipedes are carnivores, they use venom to kill their prey. They are preyed upon by birds, toads and shrews.