The Fossil Record of Cnidaria Is

question 31

Multiple Choice

The fossil record of Cnidaria is

• A)about the same as for other primitive animals,beginning in the Cambrian.
• B)relatively sparse since their bodies are so soft that they leave no skeleton to fossilize.
• C)one of the longest records,with fossils going back over 700 million years.
• D)sporadic since the marine environment is not a good substrate to preserve fossils.
• E)very recent since most of them have symbiotic relationships with advanced animals such as clown fish.

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Definitions:

Somatic Hallucinations

Hallucinations involving the perception of physical sensations that have no physical cause.

Inside the Body

Pertaining to or occurring within the physical structure of an organism, including its organs and processes.

Electric-shock Sensations

Sudden, sharp surges of pain or feeling of receiving an electric shock, which can be a symptom of neurological disorders or withdrawal from certain medications.

Positive Symptoms

In psychiatry, these symptoms include active manifestations such as hallucinations and delusions, often found in conditions like schizophrenia.