Evolution
Same bones different function evolved from a common ancestor.
What are homologous structures?
Interactions of living organisms with their environment.
What is ecology?
Otters are examples of this in an ecosystem.
What are keystone species?
Production of acid and protein digestion.
What is the stomach?
Mucus, saliva and stomach acid.
What is the innate immune system? (innate defenses)
An example is reduced pelvic bone in whales.
What are vestigial structures?
Growth rate when resources are not limited.
What is exponential growth?
When one species outcompetes another after occupying the same niche.
What is competitive exclusion?
What is small intestine?
Secrete antibodies specific to a foreign invader.
What are B cells?
MRSA in an example of this type of evidence.
Birds nesting in trees.
What is commensalism?
Plants are often referred to as this in a food web.
What is a producer?
Pacemaker of the heart.
What is the SA node (sinoatrial node)?
First to arrive when a wound forms.
Genetic bottleneck and founder effect are types of this evolutionary mechanism.
What is genetic drift?
A new species is found to have large, few offspring. This new species will follow this type of population model.
What is K selected?
Carbon exists as this in the atmosphere.
What is CO2?
What is a negative feedback loop?
Eat foreign invaders.
What are macrophages?
Flood causes the formation of a new lake resulting creating a new species.
A forest fire acts as this type of regulation.
What is density independent regulation?
Excess nitrogen and phosphorous lead to overgrowth of algae.
Blood headed to the body.
What is oxygenated blood?
Poke holes in infected cells during adaptive immune response.
What are killer T cells?