BI110 Chapter Notes - Chapter 1: Adenosine Diphosphate, Allele Frequency, Reproductive Isolation
Document Summary
Biological evolution explains the enormous diversity of life and its unity. On any given day a person can interact with up to 10,000 species either directly or. Every living thing shares certain characteristics: each organism contains cell(s), require energy, conduct metabolism, grows, responds to stimuli and reproduces. All living cells contain dna, a cell membrane and ribosomes. Dna contains the molecule necessary for life. Dna is enclosed in a nucleus is eukaryotes but not in prokaryotes. Dna is made up of building blocks called nucleotides in a double helix structure. The sequence of the dna molecule can become changed by mistakes in dna replication or by the effects of some environmental things. Biological evolution: changes in dna sequences over time. Naturel selection: occurs when the likelihood of individuals with certain traits surviving and reproducing is higher than those with other traits. The genes that encode for those traits are passed on from parent to offspring.
