Answer:
Paleontology seeks to map out how life evolved across geologic time. A substantial hurdle is the difficulty of working out fossil ages. Beds that preserve fossils typically lack the radioactive elements needed for radiometric dating. This technique is our only means of giving rocks greater than about 50 million years old an absolute age, and can be accurate to within 0.5% or better.
Explanation:
school-to-prison pipeline is a metaphor used to refer to the increasing contact that school students have with the juvenile and adult criminal justice systems.
<h3>What is
justice systems?</h3>
a term used to refer to the many organizations, establishments, and institutions that are charged with enforcing or administering the law and are typically structured to handle either criminal or civil law. The criminal justice system, which is made up of law enforcement, courts, and correctional facilities, is the one to which this language most usually refers, even though it can refer to either or both systems.
Not to be confused with the legal system, this expression more specifically refers to either:
The judicial branch of government is made up of the system of federal courts permitted by Article III of the Constitution, including the Supreme Court and any other courts created by Congress, or
the system of state courts established by the constitutions of each state
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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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