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When environmental conditions favor individuals at one extreme of the normal distribution?
When environmental conditions favor individuals at one extreme of the normal distribution, it can lead to a phenomenon known as directional selection. This type of selection increases the frequency of traits that enhance survival and reproduction in that specific extreme, potentially reducing genetic diversity. Over time, this can result in evolutionary changes within the population, as traits that are advantageous become more prevalent. Ultimately, the population may adapt to the new environmental conditions, shifting the overall distribution of traits.
What else can I help you with?
What types od individuals in a population are represented by the two ends of a bell curve?
The individuals with extreme variations of a trait.
What is selective distribution?
Selective distribution is a type of retail strategy. It involves making specific items for sale only to specific geographical markets.
Distinguish between selective distribution and exclusive distribution?
Selective distribution involves a producer using a limited number of outlets in a geographical area to sell products. An advantage of this approach is that the producer can choose the most appropriate or best-performing outlets and focus effort (e.g. training) on them. Selective distribution works best when consumers are prepared to "shop around" - in other words - they have a preference for a particular brand or price and will search out the outlets that supply.Exclusive distribution is an extreme form of selective distribution in which only one wholesaler, retailer or distributor is used in a specific geographical area.
What is a z-score used for?
The z-score is used to convert a variable with a Gaussian [Normal] distribution with mean m and standard error s to a variable with a standard normal distribution. Since the latter is tabulated, the probability of an outcome as extreme or more compared to the one observed is easily obtained.
What does a skewness of 1.27 mean?
A skewness of 1.27 indicates a distribution that is positively skewed, meaning that the tail on the right side of the distribution is longer or fatter than the left side. This suggests that the majority of the data points are concentrated on the left, with some extreme values on the right, pulling the mean higher than the median. In practical terms, this might indicate the presence of outliers or a few high values significantly affecting the overall distribution.
What are environmental test chambers used for?
Environmental test chambers are used to simulate extreme environmental conditions which machinery or materials may have to withstand. Common conditions replicated in test chambers include extreme temperatures, salt water exposure and UV light to imitate sun light.
What form of natural selection is shown on a graph as selection against an extreme?
Directional selection is shown on a graph as selection against an extreme. This occurs when individuals at one extreme of a trait distribution have lower fitness than individuals with intermediate phenotypes or those at the opposite extreme. Over time, this can lead to a shift in the average phenotype of a population.
Can bacteria live in extreme weather?
Yes, some bacteria are capable of surviving in extreme weather conditions such as extreme heat or cold. These bacteria have developed adaptations that allow them to resist harsh environmental conditions, such as forming spores or producing protective proteins.
A bell curve indicates in a trait?
A bell curve indicates the distribution of a trait or variable in a population, where most individuals fall near the average (peak of the curve) and fewer individuals are at the extreme ends (tails) of the distribution. It shows that the majority of individuals possess the trait in a typical or average level.
Do space blankets work to effectively retain body heat in extreme cold conditions?
Yes, space blankets are designed to reflect and retain body heat, making them effective in helping to keep individuals warm in extreme cold conditions.
In a population that is not undergoing natural selection for a certain trait what does the phenotype distribution look like?
The distribution will center towards hetrotrophs and thus dominant phenotypes. The distribution approaches all dominant phenotypes
What is disruptive selection and how does it impact the evolution of species in biology?
Disruptive selection is a type of natural selection where extreme phenotypes are favored over intermediate ones, leading to the divergence of a population into two distinct forms. This can result in the formation of new species as individuals with extreme traits are better adapted to different environmental conditions, driving the evolution of separate lineages.
How does bacteria respond to extreme heat or cold?
Bacteria can respond to extreme heat by forming heat-resistant endospores, and to extreme cold by adjusting their membrane and metabolic activity. These mechanisms help protect the bacteria and allow them to survive in harsh environmental conditions.
A long period of inactivity where organisms survive unfavorable environmental conditions?
This is known as dormancy. Organisms enter a state of reduced metabolic activity to conserve energy until conditions improve. Dormancy is a way for organisms to survive during periods of harsh environmental conditions such as extreme cold or drought.
When was Extreme Conditions Demand Extreme Responses created?
Extreme Conditions Demand Extreme Responses was created on 1992-03-21.
What are the adaptations of an extremophile?
Extremophiles have adaptations that allow them to survive in extreme environments, such as high temperatures, acidity, or salinity. These adaptations may include unique protein structures that can function in extreme conditions, specialized membrane structures to protect against environmental stress, and mechanisms to repair DNA damage caused by harsh conditions. Additionally, extremophiles may have metabolic pathways that allow them to thrive in specific extreme environments.
What type of selection always results in the narrowing of the bell curve distribution of alleles?
Directional selection always results in the narrowing of the bell curve distribution of alleles. This occurs when individuals at one extreme of the phenotypic range have a higher fitness, causing the frequency of the alleles associated with that extreme to increase in the population over time.
