Connection Note: Linking ECO-01 to Other Biology Topics

ECO-01 concept	Connection	Related topic
Enzyme kinetics (temperature effect)	Temperature alters enzyme active site conformation — the basis of abiotic factor effects	Enzymes chapter
Nitrogen cycle — Rhizobium	Nitrogen fixation involves nitrogenase enzyme that reduces $N_{2}$ to $NH_{3}$	Plant physiology
Cardiac glycosides (Calotropis)	Secondary metabolites — connection to plant biochemistry	Plant secondary metabolites

ECO-01 concept	Connection	Related topic
Predator-prey coevolution	Arms race = directional selection on both species simultaneously	Natural selection
Gause's competitive exclusion	Survival of the fittest species in identical niche — natural selection in action	Darwinian evolution
Batesian mimicry	Natural selection favors harmless mimic resembling dangerous model	Evolution by natural selection
Resource partitioning	Character displacement — species evolve to reduce niche overlap	Adaptive radiation

ECO-01 concept	Connection	Related topic
Thermoregulation (regulators)	Mammals regulate body temperature — hypothalamus thermostat	Human nervous system
Plasmodium (parasitism)	Malaria parasite in red blood cells	Human health and disease
Hibernation physiology	Metabolic rate reduction, fat utilization	Nutrition and metabolism

ECO-01 concept	Connection	Related topic
Carbon cycle — fossil fuels	Anthropogenic $CO_{2}$ increase → climate change	Biodiversity and conservation
Phosphorus cycle	Eutrophication from fertilizer runoff	Pollution and environmental issues
Primary productivity	Basis for ecosystem classification and conservation value	Biodiversity assessment