BIO152H5 Lecture Notes - Lecture 2: Ionic Bonding, Gene Expression, Aqueous Solution

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15 Aug 2020
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An organism"s environmental adaptations result from evolution. Evolution: process of change that continuously transforms life on earth. E. g. , the seed cones of lodgepole pine are adapted to allow rapid regrowth after a fire evolutionary adaptations in response to forest fires only open when exposed to temperatures >45 c. The cell is the lowest level of organization that can perform all activities required for life. The biosphere ecosystem communities populations organisms organs and organ systems. Tissues cells organelles molecules. Domain kingdom phylum class order family genus species. Eukaryotic cell has membrane-enclosed organelles largest is usually the nucleus. Prokaryotic cell is simpler, usually smaller, and does not contain membrane-enclosed organelles. Each chromosome has one long dna molecule with hundreds or thousands of genes. Genes encode information for building the molecules synthesized within cells. Dna is inherited by offspring from their parents. Dna controls the development and maintenance of organisms.

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