in the course of fish evolution, two of the gill slits slowly advanced into the jaws.
The evolution of fish started about 530 million years in the past at some point during the Cambrian explosion. It become during this time that the early chordates advanced the cranium and the vertebral column, main to the first craniates and vertebrates. the first fish lineages belong to the Agnatha or jawless fish.
The earliest fish, corresponding to living hagfish, developed about 550 million years in the past. Diversifications that in the end advanced in fish include an entire vertebral column, jaws, and an endoskeleton manufactured from bones in preference to cartilage. Fish live in the course of the sea and in freshwater lakes and streams.
New studies have uncovered the genetic foundation of gill covers in fish, which came about over 430 million years ago. It sheds light on one of the most essential evolutionary traits for fish, in addition to over vertebrates.
In jawless fishes, a sequence of gills opened behind the mouth, and those gills became supported by way of cartilaginous elements. the primary set of these elements surrounded the mouth to shape the jaw.
Learn more about the evolutions of fishes here: brainly.com/question/1426050
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<h2>A specimen is a whole organism which is being studied or examined</h2>
Answer:
1. The sound of the shakuhachi is deeper and deeper compared to the sound of the western flute.
2. It has the ability to be divided into three octaves on a five note scale.
3. The Japanese aesthetic quality that can be heard in the piece is the "ma", the "okua-den" lineage and the silence that can be noticed between the beats and the breath.
Explanation:
The shakuhachi is a wind instrument very popular in the east and very similar to the European recorder. It is made of bamboo and has a very simple appearance, with only a mouthpiece and 5 holes, but it has a great versatility which allows it to be used in many different genres. This versatility occurs thanks to its deep and raw sound that can be divided into three octaves and five-note scale.
