A researcher observes that a plant placed in a sealed chamber shows a net decrease in CO2 levels during the day but a net increase at night. What can be inferred about the metabolic processes occurring?
The plant is only respiring, both day and night.
The plant is only photosynthesizing, both day and night.
Photosynthesis exceeds respiration during the day, while respiration exceeds photosynthesis at night.
Respiration exceeds photosynthesis during the day, while photosynthesis exceeds respiration at night.
Related Questions
Which part of the plant cell is primarily involved in respiration?
Chloroplast
Cell wall
Vacuole
Mitochondria
What is the primary source of energy used in plant respiration?
Sunlight
Water
Carbon dioxide
Glucose
How do plants obtain the oxygen required for respiration at night when photosynthesis is not occurring?
They store oxygen produced during the day
They switch to anaerobic respiration
Through lenticels and diffusion from air spaces within the plant
They do not respire at night
In submerged aquatic plants, how does gas exchange primarily occur?
Through specialized air sacs
Through stomata on the submerged leaves
Direct diffusion across the epidermal cells
Through root systems from the surrounding water
What gas is released by plants during respiration?
Oxygen
Nitrogen
Carbon dioxide
Hydrogen
Through which tiny pores on leaves do plants exchange gases for respiration?
Xylem
Phloem
Stomata
Root hairs
If a plant's respiration rate significantly exceeds its photosynthetic rate for a prolonged period, what is the MOST likely consequence?
Increased growth and biomass
Enhanced fruit and seed production
Accumulation of starch in storage organs
Depletion of stored carbohydrates and eventual plant death
Seeds respire in
Oxygen
Nitrogen
Carbon Dioxide
Hydrogen
Which specific adaptation allows some plants to minimize water loss while still facilitating gas exchange for respiration?
Increased leaf surface area
Absence of stomata
Continuous, high rates of transpiration
Stomatal opening primarily at night in CAM plants
Plants does not need specialised respiratory organ because
Each plant part takes care of its own gas exchange needs
Plants do not need great demands for gas exchange
Both (a) and (b)
None of the above
