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Lecture

BIO lec 5 point form (informal)


Department
Biology
Course Code
BIO120H1
Professor
Doug Thomson

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population size
not members of species but spatially limited
- How big is the population?
- How many are there?
- N
Number of individuals
In terms of ecological relationships what matters is how crowded
species are
population number per area
If these trees are crowded in one are we would have the same
number but higher density
Forces of environment that regulate pop size
Animals population size is straight forward unlike plants
Aspen trees clonal organisms
Dark green trees one genetic individual grown by spreading
outward from a central point used to be a single seed
Genetic variation jumps out in the autumn
Grass makes a turf pop hard to distungish
Aspen one seed produces many identical connected stems
Same gentic individual
Larkspur – standard plant; doesn’t do anything unusual
Plant flowers trade pollen grains many different seeds are
produced as a result of combination of pollen and ovule sexual
reproduction each seed one plant
Dandelion – make flowers they trade pollen but it doesn’t
fertilized ovules produce seed that are identical copies of female
parent identical but unlike aspen theyre not identical bec of growth
identical bec of the way prodecu spread around the envi
Plants produce challenges for account of individ the way animals
do not ecology arose
Continuos grafting to form one physiological indivd comprises
many genetic
Continuous gen yeast growing in the lab bench cell fission
Discete migratory birds seasonal envi winter in S americo to
colorado episodic summer eggs one sho 2 broods brief period no add
indiv
Continuos differential eqns
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