Lecture5EvolutionAdaptation

Lecture5EvolutionAdaptation - Adaptations and Biomes Why...

Info iconThis preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
Adaptations and Biomes Why are organisms so well suited to survive in their environments?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Black-capped Chickadee Non-migratory Caches Small/high metabolism Spatial memory
Background image of page 2
Alaska vs Kansas Population from both geographic regions Common Garden Experiment Relative environmental conditions AK harsh KS milder Predictions Spatial memory Hippocampus physiology Learning
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Alaska birds cache more and learn faster Alaska Kansas
Background image of page 4
Alaska birds have more neurons,higher neurogenesis, but similar-sized Hippocampi Neuron number Hippocampal volume Neuron growth
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
NATURAL SELECTION ADAPTATION
Background image of page 6
REVIEW EVOLUTION explains the way in which the form and function of organisms are shaped by the environment ECOLOGY explains the current distribution and abundance of organisms CANNOT understand one without the other
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Remember this? Evolution = Selection X Heritable Variation Selection acts at the phenotypic level Evolution occurs at the genotypic level
Background image of page 8
GENOTYPE – includes all of the genes that an individual carries PHENOTYPE – the outward expression of the genotype
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
GENOTYPE – includes all of the genes that an individual carries PHENOTYPE – the outward expression of the genotype Homozygous Heterozygous Dominant Recessive Codominant
Background image of page 10
Ultimately phenotype is influenced by the environment Not all of the phenotype is genetically based
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Phenotypic Plasticity The capacity of an indivdual to exhibit different phenotypes depending on the environment
Background image of page 12
Phenotypic Plasticity Nemoria arizonaria Daphnia Fairy Shrimp Absent Fairy shrimp present Spadefoot toad tadpoles
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 14
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 43

Lecture5EvolutionAdaptation - Adaptations and Biomes Why...

This preview shows document pages 1 - 14. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online