Evolution

Neither.

Lamarckian evolution does not take place at all; almost all of his concepts are now known to be incorrect.

The population will still undergo mutation, and natural selection for beneficial mutations and against harmful ones will still occur.

Cnidarians are important to evolution as they are one of the earliest groups of animals to have evolved specialized tissues, such as nerve cells and muscles. This laid the foundation for the development of more complex animal forms. Additionally, their evolutionary success in diverse habitats demonstrates their adaptability and resilience, contributing to the overall diversity of life on Earth.

All theories are incomplete and never proven. They are the explanations for observations, laws, facts and experimentation. They can be added to and even overturned if now information comes to light. Darwin himself had a very poor mechanism for heredity that was overturned by Mendel's genetic discoveries.

Genetic variation, variation in alleles of genes, occurs both within and among populations. Genetic variation is important because it provides the "raw material" for natural selection.

Individuals with two recessive alleles have very high rates of reproduction.

Darwin's theory of evolution by natural selection predicts that species will change over time as individuals with favorable traits for survival and reproduction will be more likely to pass on their genes to the next generation. This process leads to the gradual accumulation of adaptations that increase the species' fitness in its environment.

Well... BASICALLY... they aren't even in washing powder, washing powder consists of tiny women, with really small sponges, who clean, and then cover your clothes in not very nice smelling odurs. I hope this helped. Love 11YD1 Science.

During the mid-nineteenth century, Darwin's theory of evolution lacked understanding of the mechanisms of heredity, specifically the role of genetics and how traits are passed on from one generation to the next. Additionally, the concept of mutations as a source of genetic variation was unknown at that time. Furthermore, the scarcity of fossil evidence and the lack of understanding of Earth's geological history hindered Darwin's ability to provide a comprehensive timeline of evolutionary changes.

Various methods have been used to date the earth itself, particularly, but not limited to, various radiometric techniques.

In 1862, Lord Kelvin announced that he had calculated the time it would take the world to cool down from its molten state. He calculated that this was between 20 and 400 million years, but later refined his calculations to within the range 20 to 100 million years. With the subsequent discovery of radioactivity, it was soon realised that the uranium present in the earth could have prolonged its cooling for as long as necessary to harmonise with other methods.

In the early years of the twentieth century, Rutherford established the age of a rock as 500 million years, by measuring the amounts of radium and helium present. Strutt soon realised that some of the helium would have escaped as the rocks were crushed for analysis, leading to false short estimates of the ages of the rocks - they were really even older than the initial estimates.

In the late 1930s and early 1940s, using the new techniques and the world's most advanced mass spectromoter, Alfred Nier dated some rocks at up to 2570 million years old. Essentially all that was needed from now on was to find the oldest possible rocks on earth and calculate the time in which the earth's crust existed in a molten state before the rocks were formed. The oldest so far found on earth are zircon crystals found in Western Australia, that are more than 4.4 billion years old.

The oldest known solid constituents of meteorites formed within the solar system are 4.567 billion years old, giving a probable upper limit for the age of Earth.

Yes, atmospheric oxygen increased significantly after the evolution of photosynthetic prokaryotes, which began producing oxygen as a byproduct of photosynthesis around 3 billion years ago. This event, known as the Great Oxidation Event, led to the oxygenation of Earth's atmosphere, making aerobic respiration possible for organisms and paving the way for the development of more complex life forms.

simulate the conditions of early Earth and test whether organic molecules could be formed from inorganic compounds. The experiment produced amino acids, which are the building blocks of proteins, demonstrating that the basic components of life could have originated from non-living matter under early Earth conditions.

This process is known as natural selection, where individuals with advantageous traits are more likely to survive and reproduce, leading to the passing on of those traits to the next generation. Over time, this can result in the overall population having more of these beneficial traits.

Physical appearance, behavior, and specific skills are traits that humans often select for in breeding programs or domestication processes rather than relying on natural selection. This can lead to a rapid change in these traits over generations due to intentional selection pressures imposed by humans.

Ice cores drilled through the thickest glaciers at Earth's poles show the layers of snow that were deposited each season kind of like tree rings. The deepest layer in the deepest ice core is the oldest and in Antarctic, continuous ice cores date back at least 750,000 years.

Gases and particles of dust trapped in the snow forming the layers in the cores continuously preserves samples of the atmosphere and these can be analyzed to provide a record of the climate prevailing as each layer was deposited.

There is no evolution. Random mating, no immigration/emigration, or, in short, Hardy-Weinberg equilibrium holds.

Genetic variation is necessary for natural selection to occur. This variation provides the raw material for differential survival and reproduction, which drives the process of natural selection. Without genetic variation, there would be no differences for natural selection to act upon.

20/20 did a little test with men of various heights. They had a man that was only 5' 2'' in the line up. Women consistently said they would not consider him suitable mate material, even when 20/20's people said he was a doctor with some wealth. Women consistently, on average, mate with men about 2'' taller than they are. Height, when environmental conditions are controlled ( read food ) is a polygenic trait under influence of 5 to 7 genes. Natural selection, over time, has favored women who have a taller man in mind as a mate.

An adaptation is a change in structure or behavior that helps a living thing survive in its environment. It enhances the organism's ability to thrive and reproduce in its surroundings, increasing its chances of survival. Adaptations can result from genetic changes over time or through learning and behavioral modifications.

The Inuit people are often cited as an example of human adaptation to extreme cold environments. Over generations, their bodies have evolved to efficiently manage cold temperatures, including features such as shorter limbs, stockier builds, and increased metabolic rates. These adaptations have helped them thrive in the harsh Arctic climate.

There is strong and growing evidence that Archaea are the closest current example of the original form of life on Earth and it is thus possible that the origins of life on other planets may be found in similar organisms.

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The term archaebacteria is now considered outdated since in recent years it has come to be understood that Archaea and Bacteria share little and have long and distinct evolutionary backgrounds.

The Archaea are single-celled microorganisms with no cell nucleus or any other membrane-bound organelles. As such, the are highly simplified. The archaeal lineage may be the most ancient that exists on Earth.

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Nematocysts are specialized organelles found in the stinging cells of cnidarians. Their main functions are to inject toxins into prey or threats for defense and to aid in capturing and immobilizing prey using barbs or sticky threads.

Seals have a closed circulatory system with a four-chambered heart, similar to other mammals. This system allows for efficient oxygen distribution throughout the body and enables seals to thrive in their marine environment.

Let us say you have three alleles in a population of beetles. Two colors; brown is recessive to green. Thus you have; GG, which is homozygous dominant and green, you have Gb, which is heterozygous and also green. Then you have bb, which is homozygous recessive. This is your population of beetles.

What do you think the allele frequency would be if GG, the homozygous dominant, either immigrated, or emigrated out of or into your population of beetles? Since the frequency of Gb and bb would necessarily go down statistically you would see more green morphologies and a change in genetic allele frequency. Assuming normal conditions.

The ones with worse resistance are less suited to suvival, and hence are selected against by being destroyed by antivirals more often.

When repeated, this means successively more and more of each generation is highly resistant, or that the reistsance is higher in each one. This is almost exactly the definition of natural selection, replacing the general trait with the specific resistance to antivirals.