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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Answer:
Jane Addams
Explanation:
Jane Addams was an American feminist, pacifist, sociologist and reformer who fought throughout her life against the social ills such as reforms in child labor, prostitution, juvenile justice, working conditions, and civil rights. As per her sociological views, she merged the core principles of symbolic interactionism with cultural feminism and pragmatism theories to obtain practical solutions for the above-mentioned problems.
Answer:
Gene is taking a Piagetian approach, while Fred is a proponent of the behaviorist approach.
Explanation:
Piaget's approach and studies centers on the fact that a child goes trough certain <em>cognitive stages,</em> in which a development occurs. These are:
- Sensorimotor Stage.
- Preoperational Stage.
- Concrete Operational Stage.
- Formal Operational Stage.
Meanwhile, a behaviorist approach centers on the fact that what matters is <em>what we can see</em> which is the behavior, instead of only creating speculation about the mind since it is <em>not tangible. </em>
The compact gave freedom to all African American colonists. It established rules that all of the Pilgrims had to follow.
The dimension that Ana is concerned with here is the channel dimension of communication.
<h3>What are the dimensions of communication?</h3>
These are the various ways that the person who is going to communicate employs in order to reach out to the audience.
<h3>The dimensions of communication are:</h3>
- Message and content
- The source
- The signal
- The channel
- The destination.
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