BIOLOGY 3SS3 Lecture 1: linear.handouts2
23 Jan 2016
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1. 1 dandelions: start with one dandelion; survive to reproduce. it produces 100 seeds, of which only 4% 1. 2 gypsy moths: a pest species that feeds on deciduous trees, introduced to n. america from europe 150 years ago, capable of wide-scale defoliation. 1 llllllllllllllllllllllllll195519601965197019751980050001500025000yearegg masses per hectarellllllllllllllllllllllllll1955196019651970197519805505005000yearegg masses per hectaremoth calculation: researchers studying a gypsy moth population make the following es- timates: The average reproductive female lays 600 eggs. 1. 3 bacteria: imagine we have some bacteria growing in a big tank, constantly di- viding and dying: They divide (forming two bacteria from one) at a rate of 0. 04/ hr. They wash out of the tank at a rate of 0. 02/ hr. They die at a rate of 0. 01/ hr: rates are per capita (i. e. , per individual) and instaneous (they de- scribe what is happening at each moment of time, we start with 10 bacteria/ml. Bacteria, rescaled: imagine we have some bacteria growing in a big tank:
