BioInteractive Outputs and Ecological Roles of Photosynthesis 3

Question 1

What is carbon sequestration and how does photosynthesis contribute to it?

Accepted Answer

Long-term storage of CO2 in organic matter or soils; photosynthesis fixes atmospheric CO2 into plant biomass that may be stored for decades to millennia

Answer

Sequestration is an industrial process unrelated to biology

Answer

Photosynthesis releases carbon into the soil immediately

Answer

Sequestration refers only to ocean absorption of CO2

Question 2

How does eutrophication relate to photosynthesis in aquatic ecosystems?

Accepted Answer

Excess nutrients trigger algal blooms (rapid photosynthesis), which then die and decompose, depleting oxygen and killing aquatic life

Answer

Eutrophication reduces photosynthesis in lakes

Answer

Photosynthesis has no role in eutrophication

Answer

Algal blooms increase oxygen permanently, benefiting fish

Question 3

Why is photosynthesis important for pharmaceutical and industrial applications?

Accepted Answer

Plants produce valuable secondary metabolites (medicines, oils, fibers) using carbon fixed by photosynthesis

Answer

Photosynthesis has no industrial applications

Answer

Plants can only produce glucose, which is not useful industrially

Answer

Pharmaceutical compounds are all synthetically produced

Question 4

What is the photoperiod and how does it affect plant behavior linked to photosynthesis?

Accepted Answer

The relative length of day and night that plants use to time flowering, dormancy, and leaf production, indirectly regulating photosynthetic season

Answer

The intensity of light that maximizes photosynthesis

Answer

The period of highest photosynthetic activity each day

Answer

The ratio of light reactions to Calvin cycle activity

Question 5

How does ocean acidification affect photosynthesis in marine organisms?

Accepted Answer

It can impair calcification in algae with calcium carbonate structures, but elevated CO2 may enhance photosynthesis in non-calcifying algae

Answer

Ocean acidification stops all marine photosynthesis

Answer

Acidification converts CO2 to O2, reducing photosynthesis

Answer

Marine photosynthesis is unaffected by ocean pH

Question 6

What is bioremediation through photosynthesis?

Accepted Answer

Using photosynthetic organisms to absorb pollutants (heavy metals, CO2, nitrates) and clean contaminated environments

Answer

Burning plant biomass to remove pollution

Answer

Using photosynthesis to manufacture synthetic chemicals

Answer

Replacing soil bacteria with algae