test 3 Flashcards
porifera
germ layers - none
symmetry - asymmetrical
body cavity - none
embryology - none
cnidaria
germ layers - 2
symmetry - radial
body cavity - none
embryology - none
Platyhelminthes
germ layers - 3
symmetry - bilateral
body cavity - none
embryology -protostomes
lophotrocozoan
annelida
germ layers - 3
symmetry - bilateral
body cavity - eucelomate
embryology - protostomes
lophotrocozoan
mollusca
germ layer - 3
symmetry - bilateral
body cavity - eucelomate
embryology - protostomes
lophotrocozoan
nematoda
germ layer - 3
symmetry - bilateral
body cavity - pseudocelomate
embryology - protostomes
ecdysozoan
anthropoda
germ layer - 3
symmetry - bilateral
body cavity - eucelomate
embryology - protostomes
ecdysozoan
echinodermata
germ layer - 3
symmetry - bilateral
body cavity - eucelomate
embryology - deuterostome
Chordata
Germ layer- 3
Symmetry - bilateral
Body cavity - eucelomate
Deuterios time
Dipoblastic
2 mejor germ layes
Endoderm- living of the digestive tract
Ectoderm- Skin and nervous system
Tripoblastic
3 major germ layes
Ectoderm
Endoderm
Mesoderm - gives rise to the muscles bones and organ systems
Body Symmetry
Asymmetry -animal cannot be divided into equal halves
Radial-round animals that can be cut into equal parts by multiple planes as long as it goes through the middle
Bilateral -animals that can be cut into equal halves but only by 1 plane (mammals)
Symbiosis
2 parties are together all the time
Mutualism
+/+ relationship
Commensalism
+/0 relationship
Facultative mutualism
Species do no need their partner to survive
Obligate mutualism
The individuals need their partner to survive
Parasitism
+/- relationship
Parasitism vs parasitoid
Parasitism - don’t usually kill their host
Parasitoid - do kill host in the end
Scramble competition
Competitor targets the resource
Interference competition
Competitors targets each other and not the resource
Interferes with your ability to get the resource
Density dependent growth
Intraspecfic competition
Fundamental niche
Everything a species wants
Realized niche
Everything a species gets
Exploitative interactions
+/- relationship
Standing defenses
Defenses that are there regardless if the predator is there or not
Inducible defenses
Those that are there only if the predator is present
species diversity
how many species are in an area and the abundance of each (%)
species richness
how many diff species there are in an area
primary succession
the growth of new things where there was no soil before and must be grown new
secondary succession
growth of new plants where soil already remained
facilitation (sucession)
one species makes it easier for the subsequent species to live in some habitat
tolerance
later succession species show greater tolerance than younger succession plants
shrubs are more tolerant of shade than herbs
inhibition
older succession plants inhibit early succession plants
keystone species
species that have a greater impact on the diversity an species richness in their community than you would predict based on biomass
Bergman’s law
the colder an area the bigger animals are usually
carnivory
the eating of other animals by a predator
animals are higher in fats and protein
carnivores have simpler digestove systems
protostome
blastopore becomes a mouth
deuterostome
blastopore becomes an anus
ecdysozoan
grows by shedding outer layer
lophotorocozoan
grows by adding increments to the body (flatworms)
life history
how an organism allocates energy and effort into growing, reproducing and maintaining its body
