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Lecture

BIO220 - Senescence Lecture.docx

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Department
Biology
Course
BIO220H1
Professor
Stinthcombe
Semester
Winter

Description
Free radicals Longevity - has constraints on evolution and may take the shape of trade offs DNArepair may be energetically costly - which may take away from fecundity More offspring, the shorter you live - reproductive effort takes away from DNArepair, etc Water striders Pierce flies and suck their guts out - females build eggs out of the energy from this food Reproductive rate  lot of food = lot of eggs If there are reproductive costs, then longevity will be lessened Females reproducing at a low rate lived for a long time - dramatic example of reproductive costs The quality of eggs - an indication of longevity and senescence High reproduction produces reproductive senescence Before reproduction ceases, they produce eggs that fail to develop Trade offs are involved in the evolution o
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