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Evolution

The scientific theory according to which populations change gradually through a process of natural selection.

5,264 Questions

Will apes take over the earth?

No, apes will not take over the earth unless their relationship to humans changes. The taking and keeping of control depends upon superior mental powers, physical force and technology. At this point, apes show no evidence of having or developing such advanced mental powers as mind control. They may be physically strong. But they lack the control that humans have over the physical environment. Neither do they seem to have the possibility of developing technology competitive with or superior to what humans have or are planning.

Does stabilizing selection favors average individuals?

Yes, stabilizing selection favors average individuals by selecting against extreme phenotypes and maintaining the status quo. It arises when individuals with intermediate traits have a higher fitness compared to those with extreme traits, leading to a reduction in genetic variation over time.

When do scientists think chemical evolution occurred?

Scientists believe that chemical evolution occurred around 4 billion years ago, shortly after Earth was formed. This process involved the formation of complex organic molecules from simpler compounds through reactions such as polymerization and the assembly of molecules on mineral surfaces.

Flying insects evolved by at least the?

Flying insects evolved by at least the Carboniferous period, around 350 million years ago. Some of the earliest flying insects were primitive forms such as dragonflies and mayflies, which developed wings for flight and became successful aerial species.

What gas formation of effervescence is due to the evolution?

Effervescence due to the evolution of gas is typically caused by a chemical reaction that produces carbon dioxide gas. This gas forms bubbles that rise to the surface. Examples include the reaction of an acid with a carbonate or bicarbonate compound.

Are the legs of a cat and fins of a whale homologous or anologous?

The legs of a cat and fins of a whale are analogous structures because they have different evolutionary origins but serve a similar function in terms of movement. Homologous structures would be when two species share a common ancestor and have similar structures with different functions.

How do pedigrees help us understand how traits are passed down?

Pedigrees help us understand how traits are passed because they are specfically bred to have a certain trait(s). This is usu. done by breeding two animals that look alike and breding their offspring to another look-alike animal/creature. Note that some pedigrees are "ruined" due to inbreeding (incest) resulting in occasional deformities or flaws.

Example

A purebred german shepherd should have two black moles on his/her cheeks together. If you bred two similar dogs you should have similar puppies. If you take another dog such as a traditional black and white border collie and bred it to a german shepherd, you can see how the puppies appear and what the differences are.

SOme traits are more desirable than others and offspring will be bred with another animal with desired traits. If this fails, normally the resulted offspring will be bred to the same creature or one similar to try and get the result. This is a result of what genes are reccesvie and which are dominate. The mroe you bred for something specific the more likely a gene is to become dominate.

How long ago did bacteria and archaebacteria diverge from a common ancestor?

It is believed by many that the archaea and bacteria developed separately from a common ancestor nearly 4 billion years ago.

How is the development of the amniotic egg analogous to the development of seeds in the evolution of land plants?

both allowed the widespread dominance of organisms on land by preventing the embryo from drying out (thus decreasing dependance on a body of water) and provided protection and nourishment to the embryo.

Do traits acted upon by sexual selection have anything to do with fitness?

Maybe, maybe not. Hopefully (hope, as in for the survival of the species) the species can both evolve traits that make it more suitable for a mate and evolve traits that will increase fitness. But this isn't always the case. Take the peacock for example. That huge tail is a beacon for predators, yet the bigger the better for mating. Because peacocks continue to have these huge tails, we can only conclude that its benefits in attracting a mate has outweighed any negative predatory effects.

Other times, the traits acquired as a result of sex selection have no effect on relative fitness; rarely beneficial.

Can the trait of rate of development be acted upon by natural selection?

Yes, the rate of development can be influenced by natural selection. Traits that affect an organism's development can impact its survival and reproduction, thereby subjecting them to selection pressures that may favor certain rates of development over others. Over multiple generations, individuals with beneficial rates of development may be more likely to pass on their genes, leading to evolutionary changes in development rates within a population.

What structure is formed when fertilization occurs?

When fertilization occurs, a structure called a zygote is formed. This is a single cell with a full set of chromosomes, resulting from the merging of the egg and sperm. The zygote will eventually divide and develop into a new organism.

Is acquired characteristics important to the theory of evolution?

Yes! The theory of Evolution shows that a species will thrive if it has favorable characteristics.

A simple way of explaining it is this: Say that when humans are still in the trees, one pregnant mother is hit by a stray photon of radiation (OK I'm dumbing it down here) and her child is mutated. The child has received the 'Sleepy Smoker Gene' (OK I'm REALLY dumbing it down here. This gene may consist of nicotine sensitivity and associated drowsiness but you get the idea).

This isn't very important at the time as nobody smokes, but fast forward to 2010. Say that the sleepy smoker gene has been inherited by every 1 in 1000 people because they are descendants of this mother primate. Now, smoking is popular and more people are likely to fall asleep while smoking. These people may eventually die off and the more favourable genes in the human race will replace them. The sleepy smoker gene will disappear into obscurity and no more people will fall asleep and die while smoking.

What are the chances of life occurring in the universe?

The chances (the probability) of life occurring in the universe is 1. We are alive, therefore life has occurred in the universe.

There is also a 99.999999999% certainty that life exists elsewhere in the universe, because there are roughly dozens of planets in billions of solar systems in billions of galaxies.

What is barboach's evolution?

barboach evolves into whiscash at level 30

Adaptations of species are determined by the genes contained in the DNA code?

Yes, adaptations in species are a result of genetic variations that occur naturally through mutations and genetic recombination. These genetic changes provide individuals with traits that can better suit them to their environment, leading to increased survival and reproduction rates, and ultimately shaping the evolution of the species.

What is the fitness of an organism?

Fitness of an organism refers to its ability to survive and reproduce in a given environment. Organisms with higher fitness are better adapted to their environment, allowing them to produce more offspring with advantageous traits that increase their chances of survival. Fitness is a key concept in evolutionary biology, as it determines the success and persistence of individuals in a population over time.

How paleontologist support Charles Darwin idea?

Paleontologists finding of fossils clearly shows the link between species as they adapt and change over hundreds of millions of years. Literally a timeline of the structure of animals to what present day species looks like

The evolution of the plant kingdom can be inferred by studying?

The evolution of the plant kingdom can be inferred by studying plant fossils, comparative morphology of plants, genetic relationships among plant species, and ecological adaptations of different plant groups. These sources provide insight into the diversification, development, and relationships among plant species over time.

How are structural similarities of animals used as evidence for evolution?

This article by ThoughtCo. demonstrates the similarities in bone structure between fauna with a common ancestor.

The following image they provide from Encyclopedia Brittanica helps detail the physical similarities in the skulls between different species of primates:

As you can see, the construction of these different skulls do vary, but are mostly similar in overall shape, and even demonstrate a gradual change over millions of years. While this evidence doesn't outright prove The Theory of Evolution, it does provide much-needed context to convince those who are too stubborn to accept that we are distant cousins with many of today's primate species (and all life on earth, as it began with one single-celled organism at least 3.7 billion years ago).

When was evolution hypothesized?

The changing of life over time was first proposed by Greek philosophers ca. 600BCE (Anaximander, Empedocles). Similar hypotheses have been proposed between then and the 18th century CE, but it was not until the 18th century that such proposals became the subject of critical thought and empirical research. Diderot and Buffon were French philosophers who proposed hypotheses similar to common descent and natural selection back in the 18th century. It was also in the 18th century that natural philosophers first began structured investigation of the fossil record, and that the thought that life changes over time became firmly embedded in natural philosophy. Before Darwin prominent names in the history of evolutionary thought are: Lamarck, Grant, Saint-Hilaire. Robert Chambers first proposed a form of common descent - though one in which all other animals were steps on a ladder leading towards modern man. It was not until Charles Darwin that universal common descent, the 'tree of life' view, was formally proposed.

Does evolution violate the Second Law of Thermodynamics?

No, evolution does not violate the Second Law of Thermodynamics.

No life disobeys the Second Law. Zygotes become embryos, embryos become foetuses, foetuses become babies, then children, then adults. All zygote-to-adult growth fails to disobey the Second Law. There is a constant influx of energy into the growing individuals through nutrition. All life carries out nutrition. There is always energy available for growth and reproduction and if there is enough energy for that, then there is enough energy for change/evolution. In this sense, Law-disobeying complexity is not added, from prokaryote to eukaryote or even from bacterium to human. It is simply growth from neonate-form to adult and there is certainly enough energy for that.

Explain the evidence of evolution presented by the mammals of Australia?

The evolutionary evidence presented by mammals in Australia includes unique marsupial mammals like kangaroos, koalas, and wallabies, which are endemic to the continent. The presence of prehistoric marsupial fossils in Australia supports the idea of an ancient lineage of mammals distinct from placental mammals found elsewhere. The diversity and adaptations of Australian mammals, such as the egg-laying monotremes like the platypus and echidna, further highlight the evolutionary history of mammals in Australia.

Does natural selection take place without human control?

yes natural selection takes place without human control. In natural selection it is the environment selecting the traits/alleles. However there is something called artificial selection which is evident in dog breeding. In that case humans select for the traits. Artificial selection can have detrimental effects on a population though. Some dogs have been selected for being very small and having a flat nose. These dogs are so small now that they cannot give birth naturally and have no use of their nasal passages

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