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.
Answer:
when discharge is high vertical erosion erodes the river bed and larger sediments are transported by transaction the river channel is at its widest and defence as a flow towards its mouth the position is the main process in this part of the river which creates large floor plans and deltas
Answer:
They have a choice whether to live in water or on land
Explanation:
since they can live on water and land they can choose where they live
Answer:
Convection currents
Explanation:
Convection currents are defined as the vertical movement of heat or moisture(energy) from one location to another primarily due to the temperature changes within the substance. Some of the examples of convection current may include boiling water, convection currents in the atmosphere and in the ocean, weather changes, campfires, etc. Thus, the air that moves in huge circular patterns as a result of temperature differences is known as convection currents.
