Currently,two Extant Elephant Species (X and Y)are Placed in the Genus

question 60

Multiple Choice

Currently,two extant elephant species (X and Y) are placed in the genus Loxodonta,and a third species (Z) is placed in the genus Elephas.Assuming this classification reflects evolutionary relatedness,which of the following is the most accurate phylogenetic tree?

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Definitions:

Fixed Costs

Expenses that do not vary with production volume or business activity level, such as rent, salaries, and insurance premiums.

Operating Leverage

A measure of how revenue growth translates into growth in operating income, indicating the extent to which a firm uses fixed versus variable costs.

Variable Cost

Costs that change in proportion to the level of output or activity in a business.

Fixed Costs

Costs that do not vary in proportion to the level of goods or services produced by a business, such as rent, salaries, and insurance premiums.