Biodiversity Chap 22 Descent with modification

Biological evolution

Heritable change in one or more characteristics of a population or species from one generation to the next

Fossil record

Complete collection of all fossils found arranged chronologically

Micro evolution

Small scale evolution within a population with a single gene

Macro evolution

Large scale evolution that results in new species forming

5 major theories of Darwinism

Perpetual change, common descent, multiplication of species, gradualism, natural selection

Adaptive radiation

Production of several ecologically diverse species from a common ancestral one, occurs I a short geological timeframe

Original of species

Created by Darwin and Wallace with information it was based on being known for decades

Acquired characteristics

Suggests that animals develop characteristics in their lifetime rather than being inherited from parents

Biogeography

Spatial record of evolution. Connected to joined continents theory. Similar species on different continents suggest past connection

Convergent evolution

2 species from different lineages show similar characteristics because they occupy similar environments

Homology

fundamental similarity due to descent from a common ancestor

3 types

Anatomical- similarities in body parts ie

Developmental- similarities in fetus

Molecular- similar dna/rna sequences