Evolution

Many things. Just physical differences, a mouse is not going to breed with an elephant. Behavioral difference, such as mating dances, calls and the like. Temporal differences, such as one organism is diurnal and the other is nocturnal, or seasonal differences. These are called prezygotic barriers to reproduction.

Postzygotic barriers can be as simple as a sterile match, such as horses and donkeys.

Then there is just physical barriers, such as mountains and water barriers.

Yes but only closely related species. If you isolated some canaries for years you could come up with a sub species of canary. but no matter how long the animals were isolated they would still be birds. they would not change into a species other than a bird species even if given millions of years.

To the organisms that produced the oxygen as a waste gas of a anaerobic metabolism, the impact was bad and severely impacted them to the point of extinction. They are now the extremeophiles.

To the developing anaerobes of the seas this addition of great amounts of oxygen was the impetus to their adaptive radiation all through the oceans of the earth.

No until plants emerged did gas exchange change somewhat again.

A small isolated population is more likely to undergo speciation because genetic diversity is reduced, leading to higher chances of genetic drift and inbreeding. This can result in the accumulation of unique genetic traits that eventually lead to reproductive isolation from the original population. Additionally, small populations are more susceptible to environmental pressures, which can drive the divergence and adaptation necessary for speciation.

Jean Baptiste Lamarck's work proposed the theory of inheritance of acquired traits, where individual organisms can pass on traits acquired during their lifetime to their offspring. This theory influenced early evolutionary thought but was largely replaced by Charles Darwin's theory of natural selection. Lamarck's work highlighted the idea of organisms adapting to their environment, sparking further discussion in the field of biology.

Yes, that process is called natural selection. It is a key mechanism of evolution where individuals with beneficial traits are more likely to survive and pass on their genes to the next generation, leading to the adaptation of populations to their environment over time.

The theory of oscillation is a mathematical theory that describes the behavior of a system that experiences periodic changes in a regular, repeating pattern. It is based on the concept of a simple harmonic oscillator, which is a system where an object (like a mass on a spring) moves back and forth in a predictable and repetitive motion. The theory of oscillation applies to physical systems, such as pendulums, electrical circuits, and many other types of systems. It can also be used to describe certain mathematical models, such as the wave equation and the equations of motion.

The theory of oscillation is based on the idea that a system with certain properties can be described by a mathematical equation. This equation is known as a differential equation, and it describes the behavior of the system over time as it experiences different forces and influences. The properties of the system, such as its mass, spring constant, and other factors, determine how the system will behave. The motion of the system is described by the solution to the differential equation, which is known as the oscillation equation.

The theory of oscillation helps to explain the behavior of a system in terms of certain variables, such as position, velocity, acceleration, and force. It can also be used to determine the frequency, amplitude, and phase of a system's oscillation. Additionally, it can be used to analyze the stability of a system, which is important to understand when designing a system that has to operate under certain conditions.

Adaptive radiation occurs when a single ancestral species evolves into a diverse array of new species to fill different ecological niches. This can happen when a population disperses to various environments with different selective pressures, leading to adaptation and speciation. Over time, this process can result in the development of distinct species with unique characteristics suited to their specific habitats.

Natural selection that leads to a great enough change in allele frequency over time in a population of organisms, evolution, and helped by environmental changes to create sub-populations of these organisms that can no longer breed among themselves and then are accounted new species.

The discovery of evolution began in the 19th century with scientists like Charles Darwin and Alfred Russel Wallace proposing the theory of natural selection as a mechanism driving evolutionary change. Darwin's seminal work, "On the Origin of Species," was published in 1859 and is considered a foundational text in the field of evolution.

Embryos provide evidence for evolution through comparative embryology, showing similarities in development among different species. This suggests a common ancestry and the existence of shared genetic information inherited from a common ancestor. By studying how embryos of different species develop, scientists can trace evolutionary relationships and infer evolutionary history.

1. Descent with modification: Species evolve over time from common ancestors, leading to diverse forms of life.
2. Natural selection: Organisms with advantageous traits for survival and reproduction are more likely to pass on their genes to the next generation, resulting in gradual changes in populations over time.

Anatomical similarities among different species provide evidence of evolution through the presence of homologous structures, which are structures that have a common evolutionary origin. These similarities suggest that different species share a common ancestor and have evolved from it over time, resulting in variations in the form and function of these structures. By comparing anatomical features across species, scientists can infer evolutionary relationships and trace the evolutionary history of organisms.

The theory of evolution is the overarching scientific framework that explains how biological evolution occurs. Biological evolution refers specifically to the change in inherited characteristics of populations over generations. Biological evolution is the observed process that supports the theory of evolution.

Both gradualism and punctuated equilibrium are theories of evolutionary change that emphasize the idea of species evolving over time. Both theories assert that species do change and evolve, but they differ in the pace and pattern of that change: gradualism suggests a slower, steady accumulation of small changes over time, while punctuated equilibrium proposes that evolutionary change occurs in rapid bursts followed by long periods of stability.

A model of evolution showing slow change is gradualism. It proposes that evolution occurs slowly and steadily over time, with species gradually diverging from common ancestors through small, incremental changes. This contrasts with punctuated equilibrium, which suggests that evolution occurs in relatively rapid bursts of change separated by long periods of stability.

When an organism is in Hardy-Weinberg equilibrium there is no evolution. There is no mutation, mating is random and thus no natural selection. Naturally, outside of labs this condition is never seen.

Charles Darwin is the scientist known for proposing the theory of evolution through natural selection in his book "On the Origin of Species" published in 1859.

You have to have variation in order to be able to have more successful variations, which succeed in evolutionary terms, and less successful variations which fail. If there were no variation in a species, there would be no natural selection.

Budding , mitosis and regeneration have no link with genetic variation.All variations in human being and other organisms are produced by MEIOSIS. During meiosis following important processes take place which include 1; crossing over in Prophase I ; Independent assortment of chromosomes and genes during Metaphase I , both of them result in reshufling of genes which is base of variation. Another source of variation is MUTATION.

One of the key contributions of the punctuated equilibrium model is that it helps explain the pattern of evolution where long periods of stasis are interrupted by short bursts of rapid change. This model helps to account for the gaps and jumps in the fossil record by proposing that species experience most of their evolutionary change during speciation events, rather than gradually over time.

Following characteristics of mitochondria and chloroplast led Margulis (1983) and other scientists to hypothesized that mitochondria and chloroplast were Bacteria and Cyanobacteria that were engulfed by Amoeboid Eucaryotic cells and became symbiotic organelles.

1; Both mitochondria and chloroplast (M&C) are self replicating.

2; Both possess small circular DNA molecule similar to Plasmids.

3; Both possess an outer membrane similar to eukaryotic cell membrane.

4; Both possess an inner membrane simillar to prokaryotic cell membrane as it lacks sterols.

5; Both possess ribosome similar to prokaryotes and smaller than eukaryotic ribosomes.

6; Both produce their own m RNA and some proteins .

7; Both can produce their own ATP.

8; Both are semidependent on animal or plant cell.

this hypothesis is called Endosymbiont hypothesis,

Molecular evidence can be used to establish evolutionary relationships by comparing similarities and differences in DNA, RNA, or protein sequences among different species. The more similar the sequences are between two species, the more closely related they are believed to be in terms of their evolutionary history. This helps scientists create phylogenetic trees to show how species are related to each other through common ancestry.

Charles Darwin's theory of evolution upset people because it challenged traditional religious beliefs about the origin of life and the role of humans in the natural world. It also posed a threat to established scientific theories of the time. Additionally, the idea that humans shared a common ancestor with other species was seen as controversial and unsettling to many people.