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.
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Answer:
Información implícita: Ideas que el autor no comunica directamente o "lee entre líneas", sino que sugiere.
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Answer:
I A
Explanation:
Vibration can simply be explained as the the action of moving back and forth quickly and steadily. And , It should be understood that sound wave is produced when an object vibrates.
It should be noted also that sound waves travel through solid, liquid and air or gas.
Therefore, it means that sound waves are not created by vibration but created or produced only when something is caused to vibrates.
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Bearing in mind this fragmentation of Chapter XIII of Leviatan, I consider that man by nature is a social being
Explanation:
We are born with the instinct to depend on the care and love of our parents, as we grow we feel the need to interact and share with others people, we are born with the innate desire to help, care for and respect those who need it, therefore justice is always linked to our being, even for many people who do not believe in God, they feel the desire to do and exercise justice when they see that bad things happen to innocent people, therefore how are we going to manifest justice in a society if we are only going to be alone? <u><em>justice is a relative quality</em></u> that is manifested in the daily life and interact with other people.
Answer: that's not social studies but the answer is that the roots find their way to the water by sensing vibrations from the water
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