What is the term for the flexible material that forms the structure of the ear?
A. Cartilage
B. Obliques
C. Spongy tissue
D. Osteoblast

A. Cartilage

Explanation:

The flexible tissue found in the nasal septum and in the ears is called cartilage .

Cartilage is one of the human body's many connective tissues, and is found between vertebrae, in joints between bones, in the rib cage, in the nose and ear, and in the bronchial tubes.

Cartilage is dense and non-vascular.

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the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.