Cellular Energetics
In an ecosystem where keystone predators are suddenly removed, how might trophic cascades affect the biodiversity and stability of that ecosystem over time?
Stability increases as fewer predatory interactions occur within the food web.
Biodiversity increases as prey populations are reduced without predation pressure.
Biodiversity decreases as prey populations grow unchecked and outcompete other species.
There is no significant impact on either biodiversity or stability due to redundant food web pathways.
When energy is lost, it increases __.
Heat absorbed
Homeostasis
Entropy
Bonds made
Which scenario best describes how eutrophication can disrupt aquatic ecosystems?
Algal blooms from excess nutrients consume oxygen during decomposition, suffocating fish populations.
Introduction of invasive plant species that outcompete native algae but produce less oxygen via photosynthesis.
Overall cooling temperatures causing stratification that limits nutrient availability for phytoplankton growth.
A reduction in aquatic plant life resulting from increased turbidity blocking sunlight penetration into water bodies.
The majority of ATP generated during photosynthesis is created in an enzyme called __.
Cytochrome-BC
Photosystem II
Photosystem I
ATP Synthase
What molecular event must occur during meiosis I for homologous recombination to contribute to genetic diversity?
Synthesis-phase nondisjunction leading to unequal chromosome copying.
Replication slippage causing microsatellite length variations in gametes.
Crossing over between nonsister chromatids of homologous chromosomes.
Separation of sister chromatids during anaphase I instead of II.
During photosynthesis, how would an abrupt change from low to high light intensity affect both cyclic and noncyclic electron flow in chloroplasts?
Both cyclic and noncyclic flows increase proportionately with light intensity.
Cyclic may decrease as noncyclic increases due to higher NADP+ reduction needs.
Noncyclic decreases as cyclic increases to protect against photodamage.
Both cyclic and noncyclic flows are unaffected by changes in light intensity.
In what organelle does aerobic respiration primarily take place within eukaryotic cells?
Nucleus.
Mitochondria.
Chloroplasts.
Ribosomes.

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Which molecule is the final electron acceptor at the end of the electron transport chain in cellular respiration?
Oxygen.
NADP+ (nicotinamide adenine dinucleotide phosphate).
Carbon dioxide.
ATP (adenosine triphosphate).
How might microevolution be observed in response to an anthropogenic (human-caused) alteration in the environment?
Maintenance of original allelic frequencies despite significant changes to environmental conditions caused by humans.
Complete loss of genetic diversity as populations face extinction from abrupt habitat destruction by human activities.
Shifts in allelic frequencies due to differential reproductive success triggered by new selective pressures introduced by humans.
Rapid formation of new species as immediate adaptations occur within one generation after human impact on habitats.
Could investigating intracellular pH changes during photosynthesis aid our understanding of its regulation and possibly reveal non-traditional buffering systems within chloroplasts?
Yes, by examining intracellular pH fluctuations, we could uncover novel aspects about how photosynthetic cells manage proton gradients essential for synthesizing sugars from carbon dioxide efficiently while maintaining homeostasis.
Maybe since while it’s indirectly associated
Potentially although traditional buffering systems already account
No because investigating intracellular pH isn’t directly tied