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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The answer is "the social-conflict approach".
The social conflict approach is a way to deal with social theory that contends that society is described by different disparities and clashes that reason individuals to act socially, delivering change.
Society, according to the social conflict approach, isn't amicable. It's not steady. Society doesn't create agreeable balance. Truth be told, it's overflowing with imbalance. So this methodology is extremely about investigating imbalances of race, class, sexual orientation, and ethnicity, and the social clashes which result. Basically, these contentions will result in change, changes that will move society.
Answer:
<h3>As air rises,the pressure decreases. lt lower pressure at higher altitudes that causes the temperature to be colder on top of a mountain than at sea level </h3>
Explanation:
<h3>I hope it helps ❤❤❤</h3><h3>Merry Christmas. </h3>
The correct answer would be, Questions that develop information about the subject's feelings or thoughts.
Investigator can ask the above mentioned question along with other two questions after initial open questions from the subject.
Explanation:
When a research is conducted, there must be a subject from whom the researcher would investigate. Initially the subject is asked or given questions, which he has to answer. After that the researcher can continue the next session of questions. Those questions can be divided into three categories:
- Questions to elicit more information
- Questions to seek an explanation
- Questions that develop information about the subject's feelings or thoughts
These three important clarification questions are asked in the second step of the investigation.
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