0
Environmental pressure. Amongst a certain population of a certain species, there will be many different mutations which developed and were passed on evenly due to neither being beneficial nor detrimental.
Any change to their habitat can be considered an environmental pressure. A drop in temperature, invasion of a competing species, etc. Natural selection will occur, as those with now-beneficial mutations are more likely to pass their genes on.
Wiki User
∙ 13y ago
Wiki User
∙ 11y ago- A population of replicators that replicate with inherited variation. On Earth today, the only known examples are organisms, including viruses, and possibly e-life.
- A limited carrying capacity: a limited ability for these organisms to extract energy and materials from their surroundings.
The limited carrying capacity effectively limits the size of the population: if more organisms are born than the carrying capacity allows, then the surplus will not have sufficient resources to breed (as much) offspring. Because some variant replicators will be more efficient at gathering resources and breeding than others, their offspring have a better chance of being in the next (limited size) generation than the potential offspring of others. This difference in reproductive success between variants is called natural selection.
Wiki User
∙ 10y ago- A population of self-replication (biological) agents must exist.
- Self-replication must occur with variation: offspring must often be slightly (genetically) different from both parent and sibling.
- Traits and variations in traits must be passed from parent to offspring through replication.
- Replication must occur often enough that there always exist slightly more offspring than can be supported by the direct environment.
Wiki User
∙ 12y agoNatural selection occurs when several species compete over limited space or resources. The species that is best suited or able to adapt best to the situation will dominate the others.
Wiki User
∙ 10y agoVariation, hereditability of traits, and differential survival.
Wiki User
∙ 11y agoThe factors needed are heritable genetic variation and differential fitness among individuals.
Add your answer:
Earn +20 pts
Why would natural selection not occur in this poplutation?
What population? Perhaps you mean if there were no variation for natural selection to select from.
What is the third step in natural selection?
There are really no steps in natural selection - just conditions required for it to occur.
How is genetic diversity important to the concept of natural selection?
Without genetic diversity, natural selection cannot occur
What characteristic within populations cause natural selection to occur?
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
What are the pressures of natural selection?
Everything from available food to climate will cause the changes we see in natural selection. Random mutations occur constantly and when those mutations are beneficial for life, the genetic code is more likely to be passed on to future generations.
Why are variations in a species needed for natural selection to occur?
What would be selected if organisms did not have differences that lead to better survival and reproduction, or the opposite. That is all natural selection is.
Does natural selection occur in the world today?
Yes, natural selection is always occurring.
Why would natural selection not occur in this poplutation?
What population? Perhaps you mean if there were no variation for natural selection to select from.
What is the third step in natural selection?
There are really no steps in natural selection - just conditions required for it to occur.
How is genetic diversity important to the concept of natural selection?
Without genetic diversity, natural selection cannot occur
what causes natural selection to occur?
the presence of predators
What requires natural selection to occur in a population?
genetic variation
Can natural selection occur in an individual organism?
No, its a group thing.
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
What term is defined as natural change that occur in communities over time?
Natural selection
What characteristic within populations cause natural selection to occur?
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
Are new alleles made by natural selection?
No - natural selection does not create new alleles. Variation in alleles needs to exist in the population in order for natural selection to occur. Natural selection will involve the change in allele frequencies over time, but it does not create new alleles. New alleles are the result of mutations.
