The elbow joint is a hinge joint formed by the meeting of the humerus, radius, and ulna. what type of bone marking enables these bones to fit together to form the joint

The correct answer is antecubital fossa.

Explanation:

Elbow joint is formed by three bones -the humerus, ulna, and radius.  

These bones at the meeting point form a small triangular depression like structure in the bone called "antecubital fossa". This fossa is created by the end of the humerus in the anterior surface of the forearm. This contains four main structures: the radial nerve, biceps tendon, brachial artery and median nerve.

Thus, the antecubital fossa is the correct answer.

fossa

Explanation:

Fossa - A shallow depression in the bone surface. Here it may receive another articulating bone or act to support brain structures. Examples include trochlear fossa, posterior, middle, and anterior cranial fossa.

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 !