Genetic change in a population/species over time
Discovered theory of how evolution occurs; 22 years old; HMS Beagle; took a 5 year trip around the world; studies natural world; obsesrved plants and animals never seen before; wondered why so different; tremendous diversity; many different species: similar organisms that can mate with each other and produce fertile offspring
Inherited helpful traits that inccrease an organism's chance of survival and reproduction in a particular environment; if a trait is harmful = less likely to be passed on (organism dies); overtime, most members of the species will show the trait
Plant or animal bred to get selective traits in offspring; Does not lead to new species
Many offspring produced; allows for greater variation of traits in the population
Offspring vary in genetic traits (color, size, ect.); sources of genetic variation = mutation, formation of egg/sperm, and sexual reproduction
Limited resources allow only some individuals to survive; Those with most helpful traits are likely to dominate the competition and live long enough to reproduce and pass on those traits; an organism best suited to it's environment/haibitat will survive
Organisms seperated by a geographic feature (deep valley, ocean, mountain range) cannot mate with the rest of the species; different traits are selected for and over time a new species may evolve
A group of organisms of one species that interbreed and live in the same place at the same time that begins to grow
A trait that is passed down from parent to offspring
Crossword puzzles have been published in newspapers and other publications since 1873. They consist of a grid of squares where the player aims to write words both horizontally and vertically.
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