2evol - BIO 20 EVOL 1 EVOLUTION 1. INTRODUCTION central...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 20 EVOL 1 EVOLUTION 1. INTRODUCTION central theme of biology - explain history & diversity of life - social abuse, religious conflicts individual variability - small genetic diffs among organisms - incr between generations over time - leads to development of diff species Lamarck - 1809, inheritance of Darwin - 1859, natural selection 2. NATURAL SELECTION 1. genetic variation among individuals in a population 2. more organisms are produced than can survive 3. competition for the resources necessary for survival 4. individuals better adapted to envi are more 5. small differences over time lead to the evolution of different species selection - by the environment evidence - lots 3. SPECIES CONCEPTS biological species - “a group of interbreeding natural populations that are reproductively isolated from other groups” - problems - protozoa, extinct, plants
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
BIO 20 EVOL
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

2evol - BIO 20 EVOL 1 EVOLUTION 1. INTRODUCTION central...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online