BS 110 Notes 12-1-2010

BS 110 Notes 12-1-2010 - BS 110 Notes 12-1-2010 Example of...

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BS 110 Notes 12-1-2010 Example of Voles – Continued As density increased o Susceptibility to stress and aggression increased o Mortality increased o Growth, sexual activity, maternal care and milk production decreased o Size of the adrenal and pituitary glands increased to produce more hormones so the voles could cope with increased stress. Investigated this and found this was true o Removed some voles from high density situations and put them in low density situations(less stress) Interactions between Organisms 1. Herbivory – a process in which a heterotrophic animal eats all or part of a plant a. Defoliation, seed and fruit consumption b. Defenses i. Structural defenses – hairs, spines, thorns, decrease bite size and therefore increase handling time ii. Plant species produce a large number of offspring during a short window of time c. MFO System – converts chemical toxins into water soluble materials that can be excreted d. Why is the world green? i.
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BS 110 Notes 12-1-2010 - BS 110 Notes 12-1-2010 Example of...

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