Background Extinction Rates Eliminate Approximately ____ Species ____

question 17

Multiple Choice

Background extinction rates eliminate approximately ____ species ____.

• A) 7-8; per 100 years
• B) 7-8; per 1000 years
• C) 7-8; per year
• D) 100; per year
• E) 100; per 1000 years

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Definitions:

Meiosis

A type of cell division that reduces the chromosome number by half, resulting in the production of gametes or spores.

Homologous Chromosomes

are pairs of chromosomes in a diploid organism that have the same structure and gene sequence, one inherited from each parent.

Anaphase I

A stage in the first division of meiosis where homologous chromosomes are separated and move to opposite ends of the cell.

Somatic Cell

Body cell; excludes cells that undergo meiosis and become sperm or eggs.