Answer:
It's c child laborers cost less money for business
owners.
Explanation:
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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<u>Answer
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The social science that has been used here is economics.
<u>Explanation:
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- The discipline of economics has a vast scope of range and applicability.
- It is not only concerned with the finances but also with the planning and utility of resources.
- The knowledge of economics is critical for the development of an individual as a sound and responsible citizen.
- Economics is also closely associated with many other branches of social science like that of geography, political science, etc.
President truman stated that the world was facing aserious threat of communism (socialism) which was eating up the most European countries.
It should be noted that socialism began in USSR( Russia) as a means of making properties and private owned properties to be owned by the community inorder to reduce the wide gap between the rich and the poor.
