Answer:
The Cambrian Explosion!
Explanation:
Sounds exciting right?
WELL IT IS!
The Cambrian explosion or Cambrian radiation was an event approximately 541 million years ago in the Cambrian period when practically all major animal phyla started appearing in the fossil record. It lasted for about 13 – 25 million years and resulted in the divergence of most modern metazoan phyla.
So in your case the answer would be 542 million years ago or the first animals with exoskeletons appear.
Answer:
A butterfly undergoes a process called complete metamorphosis during its life cycle. This means that the butterfly changes completely from its early larval stage, when it is a caterpillar, until the final stage, when it becomes a beautiful and graceful adult butterfly.
Answer:
Recognition
Explanation:
In preparing for the 40th high school reunion, Jill and Ed correctly identified 75% of their classmates from a pile of old photos that contained classmates and students from other years. Their memory task was based on recognition.
Recognition is the act of identifying anything or anyone or any situation as a reult of a previous knowledge, situation or an encounter. In this case Jill and Ed identifying 75% of their classmate from a pile of old photos
Examples of the areas in which psychological animal research has provided benefits to human populations are psychotherapy techniques and behavior medicine, alleviation of the effects of stress and pain, drugs to treat anxiety and severe mental illness, and rehabilitation of neuromuscular disorders.
Anxiety is a normal reaction to stress and can be beneficial in some situations. It can warn us of danger and help us be prepared and alert. Anxiety disorders involve excessive fear and anxiety as opposed to normal feelings of tension and anxiety.
Difficult experiences in childhood, adolescence, or adulthood are frequent triggers of anxiety disorders. It can have a particularly large impact if you are experiencing stress or trauma at a very young age. Experiences that can cause anxiety problems include physical or emotional abuse.
Learn more about Anxiety here: brainly.com/question/1754863
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