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:
Grupos sociales pueden tener varias razones para oponerse a las maquilas que se instalan en las zonas francas:
- Consecuencias fiscales: una zona franca es un lugar donde a las empresas se les cobran menos impuestos. Estos menores impuestos significan una reducción del ingreso fiscal que reciben los gobiernos, y que podría ser invertido en servicios sociales como educación y salud.
- Explotación laboral: además de los bajos impuestos, las zonas francas también atraen compañías por los bajos sueldos que pueden pagar a los trabajadores.
- Protección a la industria nacional: muchas maquilas son sucursales de empresas manufactureras extranjeras, no nacionales, y para algunos grupos, la industria nacional debería tener preponderancia sobre la industria extranjera.
European people value clean air over industry, which is what makes them fall behind america in jobs and growth
I think that the key word here is "effects" - the study would be into effects of oil - so not other oil-related topics.
Because of this the correct answer is
<span>a. How does oil shape social, political, and economic conditions in southwest Asia?
here the word "shape" is a synonym to "create and influence" - so it's about the effect!</span>
Answer:
A.
Explanation:
from personal experience and knowledge
