Discuss the causes of variation Living organisms?
Causes of variation is random mutation. Random mutations constantly occur in the genomes of organisms; these mutations create genetic variation. If all living things were same, we will all use up one type of food as our nutrient source and eventually we will run out of food to consume.. making less likely for us to survive..
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\n. \nThere is variation among humans because of sexual reproduction, crossing over, assortment, and mutations.
Anaphase 1 - the crossing over of chromosomes, they swap genetic material determining what you genetically inherit
Discuss the various survival and growth options which have been adopted in the recent past in your organization or any organization you are acquinted with.. Discuss the various survival and growth options which have been adopted in the recent past in your organization or any organization you are ac…quinted with.. (MORE)
-------------- Basically, a manager is a traffic cop. She accepts tasks from superiors and delegates them to her staff. A manager reviews the staff's progress and presents the finished work to the supervisor. He balances the workload among staff members, allocates resources, and estimates the amou…nt of time, money, etc. that will be required to complete tasks. Managers may be asked to project the annual costs for the area they manage and "sign off" on expenditures. Alternatively, this may be handled by an accounting office. The manager is a "middle man (or woman)" who represents the employees' interests to management and management's interests to employees. In a well-run company, everyone the manager works with feels they're being dealt with fairly most of the time. In a poorly-run company, the manager may be expected to be the "hatchet woman (or man)" who has to "get rid of" undesirable employees. I have read that a manager shouldn't be expected to manage more than 6 full-time employees. . Additionally, the above is well-stated. In summary, a manager's responsibility is to hold up the wall, the employees responsibility is to build the wall, and to come 360, the manager's responsibility is to ensure the employees are building the wall correctly, using the proper tools, and ensure they have the right wall-builders in place. (MORE)
School, as an organization and institution, is responsible forsocializing children to live in society. School may teach childrento respect arbitrary rules which they will have to do in theworkforce.
The ultimate source of variation is mutation. However, recombination, or crossing over, can produce enormous amounts of variation by shuffling alleles into different combinations. Combined, the two processes produce the variation upon which natural selection can act, and which results in evolution.
There are several causes for variation that occur within apopulation. Some of these causes include neutral mutations, sexualreproduction, and diploidy.
Small variations in chemical makeup or possibly inclusions of other minerals. Even exposure to heat or radiation.
it's ichnology (but a bit of a cheat because the study is normally linked to features left by fossillised animals!)
\nThe earth tilted on its axis as it is spinning and when it orbits the sun one pole is nearer the sun at one time and further away half a year later creating summer then winter, in between are spring and autumn. Whereas the opposite would be in effect for the other pole being closet to the sun whe…n the opposite is furthest away at that point in the year. This concept can be transfered to different parts of the world. (MORE)
The cause of seasonal variation is the tilt in the Earth's axis. As the earth orbits the sun different parts of the earth become directly aligned with the suns energy heading rfrom north to south and back again over the period of a year or 1 revolution.
The business structure helps the organization communicate withvarious management levels in the organization. Effectivecommunication will help a business become more profitable.
if there is variation during fertilisation in humans due to atmospheric and climatic changes,then we can notice variation in humans in further stages.
Based on the study by Abzhanov et al. ( Bmp4 and Morphological Variation of Beaks in Darwin's Finches. Science 2004 ), the differences in beak shape is partly determined by the expression of a signaling factor ( Bmp4 ). Finches that have larger and broader beaks were shown to express Bmp4 earli…er in development and at higher levels.. Finches with different shaped beaks were able to exploit different food sources and this allowed the many beak shapes to remain present. After hundreds (or thousands) of years, the birds diverged and became different species. (MORE)
variation are caused by meiosis as they split and swap bits of chromosomes to the daughter cells to create variation
when you have your computer for years and lot and lots of ever accumulating number of files building up, if you want to be ever able to actually find anything out side of memory of where you actually put it it makes the task of actually find it much more efficient... imagine a big supermarket/store …which all the food/goods were just dumped in the door with a forklift truck...now consider trying to find a packet of cereal in that shop!...exactly its a mess and you dont know where to begin because there is not categories of sub division from which to start. Now imagine how the average store is organised and you see the benefits of computer organisation (just replace the word cereal with file and supermarket/store with computer/hard drive and you'll see what the benefits are! (MORE)
Variation in Genotypes result in variations of Phenotypes which lead to the Possibility of Biological Development that did end up being Survival of the Fittest.
Human genetic variation is the genetic diversity of humans and represents the total amount of genetic characteristics observed within the human species. Genetic differences are observed between humans at both the individual and the population level. There may be multiple variants of any given… gene in the human population (alleles), leading to polymorphism. Many genes are not polymorphic, meaning that only a single allele is present in the population: that allele is then said to be fixed.  No two humans are genetically identical. Even monozygotic twins, who develop from one zygote, have infrequent genetic differences due to mutations occurring during development and gene copy number variation has been observed.  Differences between individuals, even closely related individuals, are the key to techniques such as genetic fingerprinting. Alleles occur at different frequencies in different human populations, with populations that are more geographically and ancestrally remote tending to differ more. Causes of differences between individuals include the exchange of genes during meiosis and various mutational events. There are at least two reasons why genetic variation exists between populations. Natural selection may confer an adaptive advantage to individuals in a specific environment if an allele provides a competitive advantage. Alleles under selection are likely to occur only in those geographic regions where they confer an advantage. The second main cause of genetic variation is due to the high degree of neutrality of most mutations. Most mutations do not appear to have any selective effect one way or the other on the organism. The main cause is genetic drift, this is the effect of random changes in the gene pool. In humans, founder effect and past small population size (increasing the likelihood of genetic drift) may have had an important influence in neutral differences between populations. The theory that humans recently migrated out of Africa is sometimes given as an example of this. It has been theorized that the population which migrated out of Africa only represented a small fraction of the genetic variation in Africa, and that this is a contributing cause of the observed lower levels of diversity in all indigenous humans outside of Africa. Generally, more recent neutral polymorphisms caused by mutation are likely to be relatively geographically localized and rare, while older polymorphisms are more likely to be shared by a wider range of human groups. The large majority of observed genetic variation occurs within a population in any geographic region and not between populations in different regions, although it is still usually possible to accurately identify the geographic origins of any individual's ancestors by genetic means. The study of human genetic variation has both evolutionary significance and medical applications. The study can help scientists understand ancient human population migrations as well as how different human groups are biologically related to one another. From a medical perspective the study of human genetic variation may be important because some disease causing alleles occur at a greater frequency in people from specific geographic regions. (MORE)
In recombination, cross-overs exchange alleles between homologous chromosomes during meiosis in both parents. This is what allows for much of the genetic variation in the offspring of a population in each generation. Sexual recombination works in three different ways. First, chromosomes of the male …and female exchange genetic material in the process of crossing over. Secondly, the tetrads in meiosis have two different ways to independently orient themselves in prophase I, And lastly fertilization is a completely random process. (MORE)
What is a mechanism for change in a population in which organisms with favorable variations live reproduce and pass on their favorable traits?
When organisms with favorable variations live, reproduce, and pass on their favorable traits, this is called natural selection. This is also characterized by the phrase "survival of the fittest" in the evolutionary process. However, this is not always the case. Many times the survival of entire sp…ecies depends upon outside influences such as a devastating meteor impact, or an earthquake, or any one of the innumerable environmental influences that determine whether an organism lives or dies. Also, one must consider the environmental influences such as droughts or storms and even temperature. Though not in all cases, the genome with its many checks and balances could be the determining factor. For instance, temperature of the outside air may trigger a genome moderation that may or may not be seen in the healthiest specimens while being retained or influenced by the very sickness or vigor of the organism involved, For example, virus survive by introducing themselves to the host and the genome may or may not be influenced into modification, an occurrence that may or may not occur normally in a pristine or hearty individual. Timing is also important. For example, undersea eruptions may deliver compounds needed for modification even though the creature or organism may never encounter such except in extreme instances. Also, as in the case of the human species, the longevity of organs such as the heart and lungs tend to erode with time, mostly by continued exertion. All organisms tend to show that with longevity organs tend to just wear out and that is all there is to it. All in all, survival of the fittest certainly gives an ecological advantage but this line of departure is somewhat misleading. One must remember that all organisms are made of the same atoms and the various factors asserting influence on these atoms is consistent between the hearty and robust and the sickly and weak. (MORE)
Mutations, or variations in genetic code that alter the structureof an organism, can in theory help a creature by allowingadaptation to its changing surrounding. However, genetic code canbe rather delicate; many learning disorders are attributed tocommon, malignant mutations in genetic code.
Because (in humans) we have the sperm and the egg- both have half the amount of DNA needed for a full person. Scientifically you would say we have "haploid gametes" (haploid is the half DNA bit and Gametes is a term for the sperm or egg) And because of "Crossing-Over"- in meiosis, the Chromosomes… actually swap around before splitting the cell in half and reproducing, so it is completely random. (MORE)
Viruses are not considered living organisms but can cause disease.. Prions that cause Bovine Spongiform Encephalopathy (Mad Cow disease, aka vCJD- variant Creutzfeld-Jakob disease when in humans) are not living organisms as they are just misfolded protein particles.
A few factors, mainly crossing-over in meiosis, random fertilization, and random separation of sister chromosomes in meiosis. There are also mutations, though they tend to have less of an impact of phenotypes.
In organisms that reproduce sexually, each offspring gets half itschromosomes from its mother and half from its father. Therefore,except in the case of monozygous twins, the chances ofchromosomally identical siblings are very low.
Meiosis. Mitosis is asexual. Meiosis creates genetic recombination through sexual reproduction. This provides different genes (chromosomes) to be combined and create different organisms. Mitosis makes the offspring the exact same as the parent because the same set of genes (chromosomes) are used in …the creation of the cell. (MORE)
Mutations are a source of variation in living things, the three forms being numerical, structural and gene mutations. Another source of variation is through sexual reproduction, where you have crossing over in Prophase I of meiosis, random fertilization of gametes as well as mendelian laws of indepe…ndent assortment and random segregation. What about natural selection? (MORE)
The Rate of Plants increasing,Caused The Temperature and Light Intensity Remained The same, Also causing Carbon Dioxide decreases surrounding the plants
the sun, when it is a sunny day it makes the ocean heat up and when it is cloudy the clouds are covering the sun and so it doesn't heat up
Variation provides the ability to adapt to a changing environment. As an environment changes, those members of a given species with advantageous variations will be most likely to survive and produce offspring of their own. In other words, they are more fit.
Variations arise due to recombinations(gene rearrangements) ,mutations etc.The former is the principal source of variation in sexually reproducing organisms and the latter is the source of variation in asexual organisms.According to Darwin variation arises due to chance since all the above mentioned… process occur in nature spontanuously all organisms show variation (MORE)
genetic variation happens because of meiosis. chromosomes are randomly in each sperm/egg cell, and so when they come together it's unlikely to get the same combination twice
If i would know the answer then why would i be asking for the answer. why are people slo stupid in the brain. :) jk jk love u all even my boyfriend :) lylas; lylab
If that variation is selected on the basis of survivability and reproductive success then the populations gene pool allele frequency changes and the population becomes better adapted to the immediate environment, or adapted to a new and changing environment.
DNA is responsible in most organisms, but RNA is responsible for heredity and variation of a lot of viruses.
the factors that cause variation in the climate are 1.pollution 2. precentage of water vapour in the air 3.distance of earth from the sun 4.change in precentage of different gases in the atmosphere and a lot more
Air pollution is the introduction of harsh and harmful substances into the air. When these harsh chemicals, particle matter, and materials are released into the air it causes many problems. It is very bad for the lungs, can damage reproductive-systems, and can cause death to animals. This shows the …real dangers of air pollution. If we can barely breath, can't reproduce or have animals our enviroment will be thrown into utter confusion. (MORE)
Aside from mutation the sexually reproducing variation is due to independent orientation of chromosomes in meiosis ( two ways the sister chromatids can line up in their tetrads ), crossing over ( non-sister chromatids exchanging sections of genetic material ) and random fertilization in which male a…nd female gametes randomly come together to form zygotes. (MORE)
The speed in which a molten rock is solidified, determines the size and type of crystals.
because the variation causes the variation becasue of the variation of the species. genetic mutation and adaption of some members to physical condition better than others (survival and reproduction of those best able to adapt to the environment. ) It can also be affected by the contact the species… has doesn't have with other populations of the species. (MORE)
The differences shown by the individuals of one kind of organisms are called variations. Variations are due to hereditary and non-hereditary characteristics. Characteristics, which are passed from parents to off spring, are called hereditary characteristics. In general the term variation means th…e difference in characteristics of organisms belonging to the same species in a natural population. Two types of variation, i.e. continuous and discontinuous, occur in any large population. In continuous variation, there are small differences among individuals of the same species and many intermediate forms are seen. So there is a complete gradation of many characteristics of organisms from one extreme to the other in a population. E.g. height in human being. Characteristics showing continuous variation are produced due to combined effects of many genes and environmental factors. (MORE)
the variations in genes, genes of sexually reproducing organisms will vary due to crossing-over of genes, mutations, and adaptations. In asexually reproducing organisms genes will vary through adaptations and mutations.
Variation helps and organisms, because it allows organisms tobetter adapt to their environment. From what I have learned, Idon't know what harmful effects it can do, but I know its not asharmful as mutation. Hoped it helped!
Mutation of the genetic code causes DNA variation in organisms. For example, during DNA replication, one nitrogen base may be substituted for another, or an extra base can be added, or a nitrogen base can be skipped. If any of these mutations occur during the formation of gametes (sex cells), then t…he offspring that receives the mutation may have a genetic disorder. (MORE)
Reproduction produces variation in population gene pools. Everytime organisms reproduce, be this sexually or asexually, the genomeof the offspring is slightly offset compared to that of itsparent(s). Additional factors in this may be mutagenic influencesin the environment, such as radiation.
Variation or traits are due to changes in the genes. The genes are found in the DNA and when they replicate, the process doesn't always work correctly. We have called these mutations. A few are positive for the species, some are negative (and are not passed on) and a few do not make any change at al…l. (MORE)
Hundreds of common genetic variants across the human genome influence adult height, according to a study of over 180 000 individuals published today in the journal 'Nature'. The study itself identifies over a hundred new variants and shows that they are not randomly distributed, but are clustered ar…ound genes which have been previously linked to growth.Scientists have now identified a total of 180 genetic variants which influence height. Today's study, which includes funding from the Wellcome Trust and the Medical Research Council, still only accounts for around 10 per cent of our inherited variation in height, highlighting the challenging nature of unravelling genetics.Height is a classic 'complex trait' - in other words, a trait that is influenced by a number of different genes and the environment. Over 80 per cent of the variation within a given population is estimated to be attributable to genetic factors; the remainder is influenced by a person's environment, such as their diet. (MORE)
A "variation" is a genetic feature expressed in some physical,physio chemical or behavioral manner by a living organism that isnot present in the general population of the species to which thatliving organism belongs. If that variation advantages that animal as compared to others ofthat species then… the likelihood is that that animal will breedmore successfully, potentially passing on that variation to itsoffspring. Slowly variations accumulate and one species changes into a newspecies - this is called evolution. (MORE)
Sexual reproduction causes most variation in organisms. This isbecause genes get mixed up in the process whereas in asexualreproduction the offspring is genetically identical to the parent.
Actually variation helps, because it increases diversity within thepopulation increasing chances of survival of the population in thecases of environmental disaster, disease, etc. Some individualorganisms in the population die and some live, more diversity themore likely some will live through whate…ver may happen. (MORE)