How was Darwin’s Theory Shaped by other scientists? Como fue la teoria de Darwin influenciada por otros cientificos? Lamarck (1744-1829) Darwin (1809-1882)

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Transcripción de la presentación:

How was Darwin’s Theory Shaped by other scientists? Como fue la teoria de Darwin influenciada por otros cientificos? Lamarck ( ) Darwin ( )

An organism will change during life in order to adapt to its environment. Those changes are passed on to its offspring. Change is made by what the organisms want or need. Body parts that are not used, gradually disappear. “pre-determined plan” Inheritance of Acquired Characteristics Lamarck’s Theory of Evolution/ LaTeoria de Evolucion de Lamarck Herencia de Caracteristicas Adquiridas: Un organismo cambia durante la vida para adaptarse a su entorno. Esos cambios se transmiten a su descendencia. El cambio se hace de acuerdo a lo que los organismos quieren o necesitan. Partes del cuerpo que no se usan, desaparecen poco a poco. "plan pre-determinado"

Lamarck Believed…/ El creia… Giraffes stretched their necks to reach food. Offspring and later generations inherited the long necks. La girafas alargan su cuello para alcanzar su comida. Los decendientes heredaron los cuellos largos.

Lamarck’s Theory of Evolution: 1.Recognized that all living things changed over time, and have descended from other species. Reconoció que todos los seres vivos cambian con el tiempo y han descendido de otras especies. (Correcto)

Lamarck’s Theory of Evolution: 2.Laws of Use and Disuse: Organs / Structures used would remain strong and functional, while those not used would disappear. Leyes de uso y desuso: órganos / estructuras que se usan con frecuencia permaneceran fuertes y funcionales, mientras que los no desapareceran. (No Correcto)

3.Inheritance of Desired Traits: –Traits acquired due to adaptations to the environment were passed on to offspring Herencia de rasgos deseado: rasgos adquiridos debido a adaptaciones al medio ambiente fueron pasados encendido al descendiente (No Correcto) Lamarck’s Theory of Evolution:

August Weismann Cut off the tails of mice and allowed the mice to mate. The offspring were born with tails. DISPROVED Lamarck’s theory. Corto las colas de los ratones y apareo a los ratones. Las crías nacieron con cola. REFUTÓ la teoría de Lamarck.

Charles Darwin traveled to the Galapagos island, an uninhabited environment, where he studied evolution (Darwin’s Finches) Darwin Considered the “father” of evolution. Es considerado el padre de la Evolucion. Viajo a las islas Galapago, un ambiente inabitado, donde estudio la teoria de la evolucion (Pizones de Darwin)

Darwin Believed Organisms (even within species) are all different and those which happen to have variations that help them survive in their environments. Those that survive have more offspring. Offspring are born with their parents’ helpful traits, and they reproduce, and that trait makes up more of the population. Organismos (incluso dentro de la misma especie) son todos diferentes y tienen variaciones que les ayudan a sobreviven en sus entornos. Aquellos que sobreviven tienen más descendencia. Las crías nacen con rasgos útiles de sus padres y se reproducen, y ese rasgo queda incluido en un porcentage mas alto dentro de esa población.

More on Darwin… Individuals that are not well adapted, die off. example: Some Giraffe’s had short necks, some had long necks. When lower food sources became scarce, giraffe’s with longer necks survived because they could get food. Ex2; Elephants and trunk size/water Individuos que no tienen adaptaciones beneficiales, mueren. ejemplo: algunas jirafa tenía el cuello corto, algunos tenían cuellos largos. Cuando las fuentes de alimento más bajas son escasas, las jirafas con cuellos más largos sobrevivieron porque podían conseguir alimentos. Ex2; Elefantes y trompa tamaño/agua

Darwin’s Theory of Evolution Natural Selection: Individuals with favorable traits are able to survive and reproduce. Nature controls which traits are favorable. Selección natural: Los individuos con rasgos favorables son capaces de sobrevivir y reproducirse. La naturaleza controla qué rasgos son favorables.

Why we believe Darwin Weisman’s experiment. Other observations: people who exercise, run a lot, eat well and generally healthy and fit do not have children who are inherently healthy and fit, the children have to work at it. Gene sets that are in a population determine the traits there are. Genes sets are determine by which individuals die and which survive. Experimento de Weisman. Otras observaciones: personas que se ejercitan, corren mucho, comen bien y son generalmente sanos, no necesariamente tienen niños que son sanos. Los genes en una población determinan los rasgos. Los genes que proveen caracteristicas beneficiales que ayudan a la sobrevivencia tienen mas probabilidad de ser pasados a la proxima generacion.