​Why Is It Important to Know the Background and Projected

question 10

Multiple Choice

​Why is it important to know the background and projected extinction rates for global species?

• A) At least 25% and as many as 50% of the world's roughly 2 million identified animal and plant species could vanish
• B) ​The speciation rate of pests could increase to 1,000 times the background rate.
• C) ​More species are becoming endangered in well-populated and developed countries.
• D) ​More species are becoming threatened in well-populated and developed countries.
• E) ​Background extinction rates are rising at an accelerating rate.

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Definitions:

Plasma

The liquid component of blood in which the blood cells are suspended, comprising about 55% of blood's volume.

Lymphoid Neoplasm

A type of cancer that originates from the lymphatic tissues, such as lymph nodes, spleen, or bone marrow.

Malignant

Refers to cancerous cells that have the ability to invade and destroy nearby tissue and spread to other parts of the body.

Milliliter

A unit of volume in the metric system, equivalent to one thousandth of a liter, often used in medicine and cooking.