Evolution

lemarck, jean baptiste

Evolution of paired limbs was one of major developments . Similarly development of jaws , Amnion etc are also major developments .

In the food types eaten. The ranges where some beak sizes would gather food and the ranges where other type beak sizes would gather food could be quite different and the two beak sizes would not mate and their gene pool would drift apart and become too variant for successful mating. Just one of many scenarios that could lead to reproductive isolation is birds of different beak sizes. Think of sexual selection and come up with another yourself.

My spidey senses are telling me to tell you to look in your book.

The couple spent years observing and documenting environmental conditions of Galapagos finches and how it related to beak structure. They discovered that environmental changes favored certain individuals who in turn, passed those favored traits on to their offspring. This occured more rapidly than previously supposed.

Biologists, paleontologists, geneticists, and anthropologists are some of the scientists who study evolution. They analyze fossils, genetic data, and comparative anatomy to understand how species evolved over time. The theory of evolution was proposed by Charles Darwin in the 19th century, and his ideas laid the foundation for the study of evolution.

Arrector pilli.

Humans do not have enough hair left to raise in trapping heat under a good layer of hair, so now this response just tells us we are too cold, or that danger is eminent.

Because as humans started eating softer food smaller, less energetically dis-favorable jaws were selected for. Big jaws require big expensive muscle and that energy outlay could be used elsewhere to be reproductively successful. Wisdom teeth were needed back before cooking food made it easier to chew. So, a natural selection is a sloppy tinkerer that works with what material it has the Wisdom teeth were not selected against, but, increasingly has to be pulled. Some people died of erupting Wisdom teeth in the old days before proper dentistry. This is a vestigial structure: no longer used for it's original purpose. A very few people can accommodate Wisdom teeth, but most people need them extracted when they erupt.

The educational accomplishments of your father. Your mothers bridge skills. Your fathers workout musculature. Your progeny would inherit your " desire " to evolve any trait deemed necessary and the concept of use and disuse would apply to these traits.

Because when, say prey, develop faster running ability this causes selection for faster running ability in the predator. If prey develop better camouflage then predators are selected on the basis of better eyesight and then prey turns around and is selected on the basis of better camouflage, or some other adaption that insures survival and reproductive success of individual prey.

An arms race that is constrained by what is physically possible and what evolution can tinker p on what is already there.

Just after the beginning of the 20th century a religious revival called fundamentalism gained traction in America and the battle commenced. Of course there was opposition before then, but now the opponents of evolutionary science were literalists in their biblical interpretations and well organized in their opposition to the theory of evolution by natural selection.

There is no real argument, Evolution, the change in allele frequency over time in a population of organisms, is fact. The theory of evolution by natural selection explains much of the fact of evolution. Creationism is pure nonsense.

Because of the morphological homologies they display with similar structures in other extant and extinct lifeforms, following, like virtually every other morphological or anatomical feature of life, the nested hierarchies of biology.

there is no limitation

The two concepts of the inheritance of acquired characteristics plus use and disuse of traits.

A significant change in the environment that exerts selective pressure on a population, leading to favored traits being passed on to future generations through natural selection.

Early development provides a foundation for the evolution of new traits by shaping the developmental processes that determine an organism's phenotype. Variations in early developmental processes can lead to differences in physical traits, providing raw material for natural selection to act upon. Additionally, early development can influence an organism's ability to adapt to changes in its environment, thereby playing a crucial role in the evolutionary process.

Hellen influenced the greek language and writing system for she showed the king at that time the writing system of the persians.

A simplified example of mating behavior.

If young men wanted old women as mates their genes would be selected out, as they would have few children to pass those genes to, until negative frequency selection reduced these allele in the gene pool. Men who desire young, fertile women as mates leave many descendents that carry the genes for this trait. So, over generations the mating behavior of men is shaped. and stabilizing selection keeps this mating trait/allele at high frequency in the populations gene pool.

Millions of years of adaptive change to the immediate environment. Natural selection and sexual selection in humans have shaped our bodies to preform the survival and reproductively successful algorithms that " promote " genes into the next generation. Even our faces are products of selection, sexual selection, as women drive this evolution in men by being the sex that chooses to be with a partner.

The small, many toed ancestor of the horse lived in forests and had a different diet and lifestyle. As the forest disappeared in that area the horse began to develop hooves, long legs and different teeth to deal with the grassy plains by means of variations in horses being selected against the immediate environment; grassy plains full of silicates in the grass and predators that ran their prey down.

Jean-Baptiste Lamarck was a French naturalist best known for his early theories of evolution, particularly the concept of inheritance of acquired characteristics. He studied various organisms, including plants and invertebrates, and proposed that traits developed during an organism's lifetime could be passed to its offspring. This idea contrasted with Darwin's theory of natural selection, and although Lamarck's specific mechanisms were later discredited, his work laid important groundwork for evolutionary biology.

Not well supported by the evidence and basically just assertion. Lamarck asserted that acquired characteristics, such as muscles developed during one's lifetime, were heritable. They are not. He also asserted that an organism had a " desire " to evolve. This was also not true.

Because i don't Know?:)

Because They didn't know.

Before Darwin and Wallace the accepted age of the world was only a few thousand years (based on their available data and paradigm). The idea of Evolution by Natural Selection was as much of an innovation as Special and General Relativity.