Which Lineage Is Now Extinct but Appears in the Fossil

question 5

Multiple Choice

Which lineage is now extinct but appears in the fossil record from the Ordovician period through to the Devonian period?

• A) conodonts
• B) acanthodians
• C) ostracoderms
• D) placoderms

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Definitions:

Contribution Margin

The amount remaining from sales revenue after variable expenses have been deducted, indicating the amount available to cover fixed costs and generate profit.

Gross Margin

The difference between sales revenue and the cost of goods sold, which represents the profitability of selling goods.

Gross Margin

The difference between sales revenue and the cost of goods sold, indicating the profitability of a company's core activities.

Traditional Format

An accounting income statement format that categorizes costs by their function, such as cost of goods sold, operating expenses, and other expenses.