How Much Nervous System Does an Echinoderm Have? Sea Stars

question 77

Multiple Choice

How much nervous system does an echinoderm have? Sea stars have

• A)a complex of nerve ganglia in each ray.
• B)a central nervous system including a brain.
• C)a simple nerve ring and radial nerves leading to simple sensory cells scattered over the epidermis.
• D)no genuine nerve cells are found in echinoderms;they operate completely by a hydraulic system.

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Definitions:

Prepaid Expense

An expense that has been paid in advance and is recorded as an asset until it is actually incurred.

Unearned Revenue

Unearned revenue refers to payment received for goods or services that have not yet been delivered or rendered. It is recorded as a liability on the balance sheet until the transaction is completed.

Accrued Expense

Expenses that have been incurred but not yet paid for, recognized in the accounting periods they are incurred rather than when cash changes hands.

Unearned Revenue

Income received by a company for goods or services that have not yet been delivered or performed; it is recorded as a liability on the balance sheet until the goods or services are provided.