More Than 34% of the Species That Have Been Described

question 27

Multiple Choice

More than 34% of the species that have been described and assessed are considered threatened with extinction. Which of the following lists shows the highest proportion of vulnerable species?

• A) Amphibians, gymnosperms, fish, and birds
• B) Gymnosperms, amphibians, fungi, and birds
• C) Vertebrates, invertebrates, plants, and fungi
• D) Mammals, birds, amphibians, and gymnosperms
• E) Fungi, protist species, birds, and mammals

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Definitions:

Methanol

A simple alcohol with the formula CH3OH, known for its use as a solvent, antifreeze, fuel, and as a precursor to other chemicals.

Carbon

A chemical element with symbol C and atomic number 6, essential to all known life and the basis for organic chemistry.

Hydrogens

A chemical element with the symbol H and atomic number 1, known as the lightest element in the periodic table.

Beta-pleated Sheet

A beta-pleated sheet is a common protein secondary structure formed by parallel or antiparallel beta-strands linked together by hydrogen bonding.