The imaginary line is the axis.
Answer:
Paleozoic
Explanation:
The first insect fossils are dated to the Devonian, but because of the development of the genetics, the scientists have been able to trace the appearance of the first insects in the Ordovician. The insects originated from the crustaceans. Initially they were walking on land, but they hadn't developed wings. The wings came to develop in some insects in the Devonian, and since than it has gradually became one of their trademark features. It is interesting that the first insects actually appeared at the same time with the first terrestrial plants, and also that they are the first organisms to develop wings and be able to fly.
Extinct animals can be the evidence of pre-existing life , such as dinosaurs
C rock layers... hope this helped
The cells that are responsible for attacking, adhering and digesting foreign bodies are the phagocytes. The platelets help wounds to heal and prevent bleeding and the main function of the erythrocytes is the transport of oxygen
