The Precambrian-Cambrian Boundary Represents the First Appearance of ____

question 24

Multiple Choice

The Precambrian-Cambrian boundary represents the first appearance of ____.

• A)vertebrates
• B)amphibians
• C)reptiles
• D)animals with skeletons
• E)animals with soft bodies

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Definitions:

Initial Margin

The minimum amount of equity that must be provided by an investor when purchasing securities on margin, acting as a down payment on the purchase.

Maintenance Margin

The minimum amount of equity that must be maintained in a margin account to continue holding an investment, after initiating a position.

Margin Call

A demand by a broker that an investor deposit further cash or securities to cover possible losses in a margin account.

Initial Margin

The minimum amount of funds or securities that must be deposited in a margin account before trading on margin, serving as a security for credit risk.