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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Answer:
The correct answer would be option A, Observation.
Explanation:
When someone observes something for a specific period of time, closely monitors the act which is happening, the process is called as the Observation. Observation is done in research methodologies to find out the occurrence of the specific event, and then it is recorded or noted down to get the results of that observation.
In simple words, Observation is to observe someone's specific action for a certain period of time.
So in this example, when Dawn's parents record her hair pulling behavior for a specific period of time, they are actually making observation about the behavior of their daughter.
The Mexican Federal Constitution of 1824 was Mexico's first constitution, after the overthrow of Emperor Agustín de Iturbide. The Constitution of 1824 transformed Mexico into a FEDERAL REPUBLIC, governed by a national president, congress, and supreme court, but with lots of power also given to the states.
Answer:
Organization
Explanation:
When encountering conflict, it is common for the winning side to take captives. Captives are usually weakened due to ill-treatment and isolation. The isolation also means that captives cannot communicate with their group. This inability to get organized reduces their capacity to collectively resist adversary exploitation efforts.
