In the Section "Investigating Life: in (Extremely)Cold Blood",why Would Ice

question 62

Multiple Choice

In the section "Investigating Life: In (Extremely) Cold Blood",why would ice fish lose their alpha and beta globin genes through mutation?

• A)If hemoglobin was not necessary there was no selective pressure to keep mutations from accumulating.
• B)The fish wanted to stop producing red blood cells,so they mutated the globin genes.
• C)Fish with red blood cells were more visible to predators and were eaten.
• D)Mistakes in DNA replication are more likely to occur at colder temperatures.
• E)Fish living in the cold cannot obtain enough iron to make hemoglobin.

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The difference between the total revenue earned by a business and the total opportunity costs of all resources used in the production.

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The sum of all costs incurred by a business in the production of goods or services, including both fixed and variable costs.