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:
either 2 or 4
Explanation:
if more people buy one thing, the price will go up.
if more people buy computers, the price will go up.
Abraham Maslow, noted psychologist, theorized that people were motivated by unmet needs. He created the hierarchy of needs which are self-actualization, esteem, love and belonging, safety, and physiological. He said that if there are four levels of needs that are being satisfied, that means that the individual is contented.
C- a universally free voting system
In its most basic definition a democracy is a government by the people, for the people. A voting system or elections give people the opportunity to voice their interests about things like representative officials, policies and budgets. Voting is one of the most important characteristics of a true democracy.
The Okefenokee swamp extends from Waycross, GA to the Florida-Georgia state Line boundary. It was the last piece of “untamed” Georgia area after the Civil War as the area was thought to be uninhabitable by humans.
The swamp served as a boundary between three Georgia Native American nations, a settlement for Spanish missions, a canal site, safe have for slaves and whites, a battleground between the Seminoles and the US Army, and a railroad/logging site (which destroyed a significant amount of the habitat).
To this day it is a federally-protected, indigenous wildlife sanctuary for many threatened and endangered species.
