Carbon Dioxide has Shown a Continual Increase Since Measurements Began

question 144

Multiple Choice

Carbon dioxide has shown a continual increase since measurements began about 1960.Why are scientists concerned about this rise?

• A) CO₂ concentrations could become toxic if they increase even a small amount more.
• B) An increase in atmospheric CO₂ means less in the oceans, where CO₂ is more needed.
• C) An increase in CO₂ is positively correlated with rising temperatures, one aspect of climate change.
• D) An increase in CO₂ is inversely correlated with fossil-fuel burning, which causes pollution.
• E) An increase in atmospheric CO₂ is correlated with declining levels of photosynthesis.

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Definitions:

Pleiotropic Gene

A single gene that influences multiple phenotypic traits, demonstrating the complexity of gene expression on phenotype.

Multiple Effects

The outcome or consequences that arise from a single cause, which can impact different systems or functions within an organism or environment.

Epistatic Gene

A gene that can interfere with the expression of other genes, altering the phenotypic outcome and creating variations in traits.

Dominant

Referring to an allele or a gene that expresses its phenotype even in the presence of a recessive allele of the same gene.