(04.06 HC)
Resident orcas live in coastal waters, while offshore orcas live in the open ocean
and have a larger geographic range. The table below shows the top three threats
to orca populations.
Table 1. Factors considered in listing and potentially affecting recovery of
Southern Resident killer whales.
Threat
Listing Factors
Severity Likelihood
Feasibility of
Mitigation
Prey
availability
Habitat
High
High
High, many
salmon
recovery efforts
underway
Contaminants
Habitat,
Inadequacy of
Existing
Regulations
High
High
Medium, Puget
Sound clean-up
efforts
underway
Vessel effects
(commercial,
recreational
whale watch)
Habitat,
Overutilization,
Inadequacy of
Existing
Regulations
High, whale
watching
guidelines and
outreach
underway,
NOAA
evaluating
regulations
High
High

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

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.