Consider the Following Points: (A) All Excavates Live in Environments

question 6

Multiple Choice

Consider the following points: (a) All excavates live in environments where oxygen availability is low; (b) all excavates lack mitochondria; and (c) all excavates have some mitochondrial genes. Based on this information, which of the following statements is TRUE of the excavate lineage?

• A) Their ancestors were eukaryotes that existed prior to the origin of mitochondria.
• B) Their ancestors had mitochondria, but the mitochondria were lost over time.
• C) Their ancestors were not able to metabolize glucose.
• D) Excavates are in the process of acquiring mitochondria through evolutionary adaptation.

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Definitions:

Geothermal Heat Pump

A central heating and/or cooling system that transfers heat to or from the ground, using the earth as a heat source or sink.

Net Present Value

A financial metric that estimates the profitability of an investment or project by calculating the difference between the present value of cash inflows and outflows over a period of time.

Compound Interest

Interest calculated on the initial principal and also on the accumulated interest from previous periods.

Cash Payback Period

The time it takes for an investment to generate an amount of cash inflows equal to the initial cost of the investment.