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The biological fitness of an organism is dependent on its ability to survive and reproduce in a given environment. If different traits or alleles increase the fitness of an organism, those alleles will consequently increase in the gene pool, and that trait will increase in the population.
This is how natural selection affects a population. There is inherent trade-off in biological fitness. A trait that increases ability to survive, but makes an individual sterile, decreases fitness because the organism cannot produce offspring to carry on the trait. Similarly, if a trait increases the ability to reproduce, but makes it harder to the organism to survive, it may die before being able to produce offspring.
Both survival and reproduction are essential to defining the fitness of an organism. Biological gcse biology homework help in the evolutionary sense is only related to fitness in terms to reproduction. Because the primary goal of all organisms is to reproduce, or to pass their DNA onto offspring, fitness is defined as the ability to reproduce and create viable offspring. The term "fitness" in evolutionary biology means the ability of an organism to pass on its genetic material to its offspring.
Biological or "Darwinian" fitness is being able to live long enough to reproduce and keep the population or species alive. Most students confuse biological fitness with physical fitness because that is the context most often associated with the word.
In the study of evolution, sometimes it is useful to assess the biological fitness of an individual. What is the best criterion to use to measure the biological fitness of a certain large, gcse biology homework help, strong iguana?
Biological or Darwinian fitness is defined based on the specimen's ability to reproduce and generate viable offspring. Essentially, the fitness of the individual is based on its ability to pass genetic information on to the next generation, as opposed to any physical characteristic or trait.
Measuring the number of offspring who contribute to the gene pool is the best way to determine how genetically fit the iguana is. No matter how strong, gcse biology homework help, large, old, or free of predation an animal is, if it cannot reproduce, it is not considered fit. All of the examples given provide an evolutionary advantage. A white rabbit in a snow covered environment has camouflage, which protects it from its predators. The same is true with the black moth living in a in a soot-covered industrial area.
The same is true for a bird that can crack nuts in an area where nuts are the main source of food. A female cheetah in Africa has four litters of cubs over her lifetime. Her first litter has six cubs that grow to adulthood and is fathered by the most spotted male in the area. Her second litter has four cubs that grow to adulthood and is fathered by the fastest male in the area.
Her third litter has two cubs that survive to adulthood gcse biology homework help is fathered by the strongest male in the area.
Her fourth litter has five cubs that survive to adulthood and is fathered by the smartest male in the area. Which male cheetah has the most biological fitness? The term biological fitness refers to reproductive success and gcse biology homework help different than physical fitness. Since the most spotted male fathered the most cubs that survived to adulthood to reproduce themselves, he would be considered the most biologically fit.
It is also important to note the inclusion of the "survived to adulthood" aspect since reproductive gcse biology homework help is dependent on an organism's offspring being able to reproduce and contribute to the gene pool as well. For example, if the most spotted male had fathered a litter that initially had nine cubs, but only one of them survived to adulthood to have cubs of its own, he would no longer be considered the most biologically fit.
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Possible Answers: the ability of an organism to survive and reproduce. the amount of energy an organism can use in the environment. the percentage of energy that is dedicated to mating. Correct answer: the ability of an organism to survive and reproduce. Explanation : The biological fitness of an organism is dependent on its ability to survive and reproduce in a given environment, gcse biology homework help.
Report an Error. Example Question 23 : Genetics And Evolution. Which of the following best describes biological fitness? Possible Answers: Ability to reproduce. Correct answer: Ability to reproduce. Explanation : Biological fitness in the evolutionary sense is only related to fitness in terms to reproduction.
Example Question 24 : Genetics And Evolution. Possible Answers: the ability of an organism to run for long periods of time, gcse biology homework help. the ability of an organism to kill another organism. the ability of an organism to create offspring. the ability of an organism to protect its young. Correct answer: the ability of an organism to create offspring. Explanation : The term "fitness" in evolutionary biology means the ability of an organism to pass on its genetic material to its offspring.
Example Question 25 : Genetics And Evolution. Possible Answers: The weight of the iguana. The number of the iguana's offspring who also survive to reproduce. The number of predators the iguana has in its environment. Correct answer: The number of the iguana's offspring who also survive to reproduce. Explanation : Biological or Darwinian fitness is defined based on the specimen's ability to reproduce and generate viable offspring.
Example Question 26 : Genetics And Evolution. Which of the following is an example of an evolutionary advantage? Possible Answers: A black moth that lives near an industrial site that produces a lot of soot. A white rabbit that lives in a snow covered environment. A cheetah that can run faster than the rest of his pack. A bird with a beak that can crack nuts in an environment where nuts are the main food source.
Correct answer: All of these. Explanation : All of the examples given provide an evolutionary advantage. Example Question 27 : Genetics And Evolution. Possible Answers: The fastest male. Correct answer: The most spotted male. Explanation : The term biological fitness refers to reproductive success and is different than physical fitness.
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