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Evolution
The scientific theory according to which populations change gradually through a process of natural selection.
5,264 Questions
Why an organelle considered as an organelle?
Lysosome contain digestive enzymes for almost all type of organic material. If their covering membrane breaks as it happens during injury to cell, the digestive enzymes will spill over cell content and digest the same. As lysosomes are organelles which on bursting can kill cells possessing them ,they are called suicide bags.
Who propounded the theory of evolution?
The theory of evolution was proposed by Charles Darwin in his book "On the Origin of Species" published in 1859. Darwin's theory suggests that species evolve over time through the process of natural selection.
What Factor is necessary in the formation of a new species?
Isolation or reproductive barrier is necessary in the formation of a new species. This can occur through geographical isolation, behavioral differences, or genetic mutations that prevent interbreeding between populations.
Why is it important that variation exists within populations of a species?
Without variation there is nothing to select for against the background of an immediate environment and thus no evolution as alleles, not selected for, would not change over time in this population of organisms.
Without variation the environment can change quickly and send your population to extinction if there were no variants that could meet this challenge.
Jean-Baptiste Lamarck proposed the theory of the inheritance of acquired characteristics, which suggests that the use or disuse of an organ could lead to changes in that organ that are then passed on to the offspring. This theory was later found to be inaccurate in light of modern genetics and the principle of inheritance through DNA.
Does Natural selection occur in opposition to evolution?
Some have thought so because natural selection was seen to reduce variation by culling unsuccessful phenotypes so that alleles did not change over time in populations. This is no longer thought as much as the rates of mutation are better understood and known to outpace natural selection and that adaptive change can accommodate more than one successful phenotype so that many allels can be fixed in populations gene pools.
A kidney stone is a hard deposit of minerals and salts that forms in the kidneys. It can be very painful as it passes through the urinary tract. Drinking plenty of water and making dietary changes can help prevent their formation.
Is evolution a linear progression or a tree?
Evolution is more of a tree. For example, humans are not descended from the monkeys you or I would see today, nor did they somehow turn into humans. Instead, modern monkeys and humans share a common ancestor that eventually split into several different species. Another argument sometimes heard is, "If humans came from monkeys, why are there still monkeys around?" This is because there was no linear progression of monkeys towards humans. A small group of ancient monkeys gathered more and more mutations until they were different enough from the original monkeys to be considered a different species. Note that no where in this example did the original species disappear; they still lived on while a few changed.
Sexual selection is driven by competition for mates and the preferences of individuals for certain traits that increase reproductive success. This can include physical characteristics that indicate good genes or social status, as well as behaviors that demonstrate fitness or compatibility. Ultimately, sexual selection is a mechanism that shapes the evolution of species by influencing which individuals are successful in reproducing.
No matter what theory you believe is correct. God created life and the Universe.
Answer:
There are many potential routes that could result in life being initiated on Earth. One of these is the process of abiogenesis, the creation of life by increasingly complex chemical reactions. alternate explanations include panspermea. This suggests life arrived on Earth from extrasolar origins. Neither requires a deity's intervention.
What is the ultimate outcome of evolution?
There is no " ultimate outcome " of evolution. Evolution just is the change in allele frequency over time in a population of organisms. It has no direction, it is not progressive, does not plan for the future, is not linear and it does not know what it wants. Such as " ultimate outcomes. "
An evolutionary path refers to the series of changes and adaptations that an organism undergoes over time as it evolves to better suit its environment. This includes genetic mutations and natural selection that drive the development of new traits and species.
Which is real creation or evolution?
Both are real, and neither contradicts the other. This is somewhat true: we are created. We have a Creator. Anyone who disagrees with me can talk to me and I will prove that we indeed have a Creator. There is no other explanation for the amazing and intricate detail that is in our body. The cells, all the systems in the body, and how we have been given exactly what we need. If you have studied life science then you can see how completely impossible it would be to get the intricate and amazing systems which we contain, from a simple explosion. Think of it this way: you have just received a new box of Legos and you shake them really hard. You just can't expect to open the box and see the intricate Tower of London that the kit was supposed to make. If you do expect this you are either brainwashed or insane. Now whether or not our Creator used the process of evolution is not clarified in the Bible so people have different beliefs.
Another answer: To say that those who believe in evolution are insane or brainwashed, we can say that the finger points both ways. There is no way to prove the creationism view point. Through the process of descent with modification, the common ancestor of life on Earth gave rise to the fantastic diversity that we see documented in the fossil record and around us today. Evolution means that we're all distant cousins: humans and oak trees, hummingbirds and whales. It all began with the Big Bang around 14 billion years ago. Thinking man first was seen more than 500,000 years ago. What started the Big Bang...no one knows even if they would like to think that they know. At least scientists can admit that they still don't know it all.
To say that shaking a box of Legos and expecting them to form into the Tower of London is not what evolution is about. We are saying that life evolved from single cells and then organisms that have as few has 800 cells into larger and more complex organisms all under the response to the environment.
Another answer:
A Jewish answer is that we have an unbroken national tradition of 3300 years to the Revelation at Sinai. God states that He created the universe (Genesis 1:1; Exodus 20:10). This tradition is accepted by Christianity and Islam also. Not to mention, that Evolutionists have not put forth any putative proofs that would undermine the tradition.
God's creation of the universe explains the vast wisdom found within it.
There are some people who believe in Creation without quoting the Bible. Their reasoning includes:
1) The glaring lack of transitional fossils has been noted by the evolutionists themselves, such as this statement from the famous paleontologist and evolutionist George G. Simpson; quote: "The regular lack of transitional fossils is not confined to primates alone, but is an almost universal phenomenon."
"The lack of transitional series cannot be explained as being due to the scarcity of material. The deficiencies are real; they will never be filled" (Nilsson, N. Heribert).
"To the unprejudiced, the fossil record of plants is in favor of special creation" (Corner, E.J.H., Contemporary Botanical Thought).
Another answer:
Many religious people, including theologians, feel that a deeper understanding of nature actually enriches their faith. Moreover, in the scientific community there are thousands of scientists who are devoutly religious and also accept evolution.
It can not be both ways. Besides mutations are harmful, helpful or neutral depending on the third base (wobble effect).
The dates that radioactive clocks have put on evolutionary history are astonishing. Life is well over 3.5 billion years old, and until about 600 million years ago, the planet was dominated by microbes. Radioactive clocks have shown that evolution can change its pace. Almost all scientists agree.
Harvard paleontologist Stephen Jay Gould drew attention back to embryos. He documented the history of scientific research that had led to so much confusion. The timing of development is controlled by two knobs. One controls the rate at which an organism grows. The other controls the rate at which it changes shape over time. Random mutation may end up changing the settings of each knob, thereby speeding up or slowing down the rate at which a species' embryos develop. These kinds of adjustments can alter the entire body of an organism, or individual organs. Gould predicted that with heterochrony, the genes that regulate other genes would hold the key to the evolution of embryos. His prediction has now been borne out.
Junhyong Kim and his fellow Yale biologists compared the timing at which a crucial developmental gene became active in the fruit fly and two close relatives. They found that the gene (for timing) started to make its proteins at different rates in the 3 species led to differences in their anatomy - even though the developmental gene itself is identical in all three species.
And Lastly: Though fishermen will always tell tall tales about the big one that got away, more and more evidence suggests that the "big ones" simply don't exist anymore and Dr. David O. Conover's work suggests why: many fish are evolving smaller body sizes. We are changing their environment by fishing for and selecting the larger. The genes that produce the smaller size are selected. This is natural selection at work now.
One other thing that shows evolution at work today is the fact that some groups of peoples have higher numbers with one recessive gene for sickle cell anemia. They live in areas of the world where malaria is common. People with one copy of the gene live longer than those with none. People with two copies do not survive long. The environment, along with the mosquitoes, are selecting humans with the gene that allows them to live longer and reproduce more children. Both the fish and people are evolving right now at this time.
How would you use evolution natural selection adaptation and fitness in a sentence?
An important mechanism in evolution is natural selection, which allows populations to develop adaptations to changing circumstances based on the fitness landscape of the environment.
Nah, still doesn't work. I'm no good at long sentences.
How does Darwin's theory of evolution challenge the biblical view of creation?
Darwin's theory states that we evolved from microbes and only the fittest survived. The biblical view of creation states that everything on earth was created by God exactly as it is.
The Biblical view does not actually disagree with Darwin's theory, contrary to certain sectarian religious teachings. On the contrary, the legitimate Biblical view is that the creation accounts were allegorical in nature. Only one particular narrow, literalistic interpretation at definite odds with reality insists all creatures were fashioned within one six day window.
Was Darwin influenced by Mendels ideas about genetics?
No, Darwin knew nothing about Mendel's ideas and work. His, Darwin's, heritability concept was absolutely wrong. There is a legend that Darwin had a copy of Mendel's work in his desk but could not read German. The veracity of this story is often challenged.
What is a group of organsims capable of breeding called?
A group of organisms capable of breeding is called a population. This term refers to all the individuals of the same species that live in the same area and can interbreed.
What is the importance of studying the evolution of life?
Studying the evolution of life helps us understand how living organisms have adapted and diversified over time, providing insights into the origins of different species and their relationships. This knowledge can help us make predictions about future evolution and better understand the mechanisms driving biological diversity. Additionally, studying evolution can have practical applications in fields such as medicine, agriculture, and conservation.
How natural selection favor evolution of drug-resistant pathogens?
Natural selection favors the evolution of drug-resistant pathogens because when a population of pathogens is exposed to antibiotics, those that have genetic variations allowing them to survive and reproduce will pass on these resistance traits to future generations. Over time, this can lead to the emergence of drug-resistant strains as the surviving pathogens multiply.
Which kingdom is most divided in the five-kingdom system?
The Protista kingdom is the most divided in the five-kingdom system because it encompasses a wide range of organisms with different characteristics and evolutionary histories, making it a diverse and complex group.
Why do evolutionists think that humans have stopped evolving?
Some evolutionary biologists do, but we have rather strong evidence that humans have not stopped evolving since becoming human. Two pieces of evidence that are recent in evolutionary time are the sickle cell trait and the lactose tolerance traits in some humans. There are some others being tested now.
Remember, evolution is the change in allele frequency over time in a population of organisms. How could that ever stop? Only extinction could stop it.
PS It is not " evolutionists. "
Which of the following is necessary for evolution to occur?
Genetic variation is necessary for evolution to occur, as it provides the raw material for natural selection to act upon. This variation can arise from mutations, genetic recombination, or gene flow.
What must occur in order for a population to diverge?
For a population to diverge, there needs to be barriers preventing gene flow between different groups within the population. This could result from physical barriers, such as mountains or rivers, or behavioral barriers, such as differences in mating preferences. Over time, genetic differences can accumulate between the populations, leading to divergence.
How does mutation and natural selection operate together in the process of evolution?
Under natural selection, not all genes are successful, but those which are will progress to the next stage of selection.
Mutations introduce new genetic information to an organism's genetic code, providing more genotypes to create more phenotypes, which can be acted on and potentially more suitable ones to be selected.
What scientist first described evolution as a process of adaptation?
Jean-Baptiste Lamarck, a French scientist, was one of the first to propose a comprehensive theory of evolution in the early 19th century. He suggested that organisms can adapt to their environment through the inheritance of acquired characteristics.
