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Does natural selection increase or decrease variation in a population?
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Why genetic variation is of to benefit to a population?
It can provide resistance to diseases or other beneficial characteristics. -variation in more competitive species than our own can result in natural selection that is better focused to the specific environment: there is a bigger range of characteristics, so the best traits allow those members to survive longer and therefore mate more. This allows the species overall to constantly reproduce the beneficial traits and flourish.
What are three ways to get genetic variation?
Independent assortment of chromosomes, crossing over and Random fetiliztion
What does a decrease in salmon population due to an increase in river temperature indicate?
an abiotic factor affecting a biotic factor
Evaluate the significance of mutations and repair of mutations to the evolution of sexual reproduction?
evaluate the significance of mutations and repairof mutations to the evolution of sexual reproduction
What movement does not increase or decrease the angle between bones?
Rotation and supination do not increase or decrease the angle between bones.
What id genetic variation?
Genetic Variation is a measure of the genetic differences there are within populations or species. For example, a population with many different alleles at a locus may be said to have a lot of genetic variation at that locus. Genetic variation is essential for natural selection to operate since natural selection can only increase or decrease frequency of alleles already in the population
What can the variation become?
The variation can either increase or decrease depending with the genetic factors.
Which type of selection tends to increase genetic variation?
Natural Selection.
What is the relationship between two quantities that increase or decrease together?
Direct variation
What can genotypic variation in a population increase through?
Not to sure
What increases genetic variations?
A large population increases genetics variation. Mutation will also increase genetics variation.
What are two factors that increase population size and two factors that decrease population size?
Increase: Survival and Immigration Decrease: Death and Emigration
Can the population increase and decrease at the same time?
no
Did the population of north America increase or decrease from 1830-1840?
increase
Reasons for rapid increase in population?
Immigration, decrease in infant mortality, increase in birth rate, decrease in mortality.
What could cause a decrease in insect population?
an increase in the spider population
An increase in predator population will directly result in?
A decrease in the prey population
