ecological studies
- 1. seek to explain why there are so many species
- 2. why a given set of species occur in a particular area
- 3. how those species interact and persist
what is ecology
from greek oikos
the study of relationship between organisms and
osmoregulation
controlling water & salt balance
homeostasis
maintenance of relatively constant internal body environment
despite the varying external environmental conditions
3 situation
hyperosmostic
organisms living in freshwater with higher internal
what is gamete
sex cells
eggs in females
sperm in males
oviparous
species that lays eggs
ovoviviparous
live birth
embryo develops inside eggs but remain in mothers body until hatching
viviparaous
live birth
embryo actually develops inside the body of
evolutionary history
classifications of living organisms
starts broad with all animals
kingdom
all animals
phylum
non vertebrate animals
class
amphibia (cold blooded animals)
order
anura (all frogs)
family
hylidae (tree frogs)
genus
specific type of hylid
biogeography
plant and animal species
distribution and richness
across space and time
land bridges vs continental drift
ocean frozen over like alaska back in the day
one section of land stuck together
continent connected
pangea
the bigger the island
