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BIO 07
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menstration cycle
rebuilding the endometruim and releases of an egg
women primary sex organ
ovaries -makes gametes
HCG --Human Chorionic Gongdatropin
used to tell body that is prego
scrotum
-hold testes
-muslces to contract
-close to body to be warm
-muslce relaxs when cool
seminiferous tubule
150 meters long
makes sperm
very coiled
leydig cell
produce testoserone
bulbourethal gland
pre cum
total solution ejaculated is -semen
only 1% sperm
head
contains DNA
mid piece
contains mitochondria to power movement
flagellum
tail quickly moves to propel the sperm
acrosome
cap of the head.
breaks down the zona pellucide
ecology
organisms interact with each other and the enviornment
population
group of one speiece in a particular area
community
all organishm of every speieces in a particular area
ecosystem
living and non living things in a partucular area
species
organisms inter-breed for a viable offspring
population size
# of indiviuals in population
population density
# of indiviuals per square area
estimations
tool used to determine population size and/or density
" J shaped " growth curve
(exponential)
starts off small then grows rapidly
as population size increases....
so does population density
An increase in population density....
has negative effects in population growth
Negative Effects
-competetion for resources
-increased chance of being preyed on
-disease easily spread
" S shaped curved"
initial exponentail growth followed by growth stabalization
carry capacity
# of indiviuals the environment can support
"boom and Bust" growth pattern
-seasonal changes
-found in smaller organisms
"predator & prey interaction"
as prey population grows so dose the predator and same for when it dies
fertitlity rate
average number of children per female in a population
what affects population size
+/-
+ birth and immigratioin
- death and emmigration
habitat
physical surrounding of a population
niche
"occupation" of a population within its habitat
competition exclusion principle
2 species for the same cital resource only one wins and the other does extinct
comouflage
organsim looks like the enviornment
mimocry
taking appreance of the different species for the benefits
Trophic Levels
feed levels
Four levels of trophc levels
4) teritaty consumer-eat secondary consumers
3)secondary consumer- eat primary consumers
2)primary consumer-herbivores; eat producers
1)producers- use photosynthesis; self feeding
food web
graphic reprsentation feeding relationship in a community
Author
nbk1hmy
ID
48079
Card Set
BIO 07
Description
sB
Updated
2010-11-14T19:28:25Z
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