The giant short-faced bear disappeared completely from north america about 12 million years ago due to competition from smaller omnivorous brown bears which migrated from eurasia. which pattern of evolution does this example represent? a. coevolution b. phyletic gradulism c. extinction

Extinction  

Explanation:  

The process by which the total number of organism of a particular species die due to some natural cause or man made cause is known as extinction.It is a part of evolution.

Here, in this case the extinction of native species took place because they could not survive while competing with the invasive species. This lead to mass extinction of the giant short faced bear.

my teacher would say no s

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.