BIO 150|105 Final Exam Gobetz Questions Correctly Answered|2024
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What is a population? - ️️interbreeding of a group of individuals who have the same species, geographics and time period. The population is exchanging genes
What is the purpose of variability within a pop? - ️️some genetic variants have advantages and natural selection can act on variation...
BIO 150 |105 Final Exam Gobetz Questions Correctly Answered What is a population? - ✔ ✔ interbreeding of a group of individuals who have the same species, geographics and time period. The population is exchanging genes What is the purpose of variability within a pop? - ✔ ✔ some genetic variants have advantages and natural selection can act on variation Two process that can occur if a pop. cant exchange genes - ✔ ✔ genetic divergence and speciation Decreasing variation in a species leads to - - ✔ ✔ instability 3 levels of biodiversity - ✔ ✔ 1. genetic diversity 2. species diversity 3. ecosystem diversity What is being measured as biodiversity? - ✔ ✔ species richness and species evenness species richness - ✔ ✔ the number of different species in a community species evenness - ✔ ✔ the relative proportion of different species in a given area what is richness and evenness? - ✔ ✔ diversity index What has a higher biodiversity? - ✔ ✔ small animals and the tropics, greater geographi c variation What is a novel ecosystem? - ✔ ✔ A system of abiotic, biotic, and social components that, by virtue of human influence manifest novel qualities without intensive human management How much of Earth is now a novel ecosystem? - ✔ ✔ 75% ecosystem s ervices - ✔ ✔ The goods and services that ecosystems provide to humanity Human causes of biodiversity - ✔ ✔ pollution, land use change, introduced invasives and exploitation of resources Global cause of biodiversity - ✔ ✔ climate change traits of invasive species - ✔ ✔ tend to be aggressive/adaptive introduced for a purpose outcompete natives sometimes dont have predators What did Charles Darwin study on the Galapagos Islands? - ✔ ✔ tortoises and their shells In a healthy population, a species - - ✔ ✔ should have many genes Darwin said that - ✔ ✔ species arent changing and that nat. sel. causes adaptation in organisms What is evolution? - ✔ ✔ the process by which different kinds of living organisms are thought to have developed and diversified from earlier fo rms during the history of the earth. Adaptation - ✔ ✔ inherited characteristic that increases an organism's chance of survival biological fitness - ✔ ✔ the ability of an individual to produce surviving, fertile offspring relative to that ability in other i ndividuals in the population germline mutation - ✔ ✔ DNA alteration occurring in gametes that can be transmitted to offspring - random - naturally occurs in populations - change in amino acid Most mutations - - ✔ ✔ DO NOT lead to variation Most organisms can - - ✔ ✔ survive and reproduce competition for resources - ✔ ✔ some die off or some reproduce more than others Natural selection causes - - ✔ ✔ adaptation in organisms Organisms with a higher fitness are able to - - ✔ ✔ reproduce Allele - ✔ ✔ Different forms of a gene Phenotype - ✔ ✔ An organism's physical appearance, or visible traits. Genotype - ✔ ✔ An organism's genetic makeup, or allele combinations. Homozygous - ✔ ✔ An organism that has two identical alleles for a trait Heterozygous - ✔ ✔ An organism that has two different alleles for a trait Mendelian Genetics - ✔ ✔ inheritance patterns which can be explained by simple rules of dominance and recessiveness of genes.
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