How does a lobster carry out the life activity of
breathing?

Like the mollusks, lobsters use gills for breathing. The gills are featherlike structures located in a water-filled chamber under the carapace. Each gill is attached to the upper end of a walking leg. The rapid beating of the mouthparts sends cur- rents of water over the gills. Oxygen in the water diffuses into the gills, and carbon dioxide passes from the gills out to the water.

Explanation:Lobsters use gills to breathe. Their gills are blood-filled, feathery organs which extract oxygen from water. The gills can be found at the base of the lobster's legs. ... To maintain a steady supply of oxygen, the gills circulate water for lobsters the way our respiratory system circulates air to breathe.

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explanation:

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !