11- Describe how DNA sequences can reveal evolutionary relatedness. 12 - Describ
ID: 47340 • Letter: 1
Question
11- Describe how DNA sequences can reveal evolutionary relatedness.
12 - Describe the forces that lead to the evolution of new species.
13- Define a biological species.
14- Compare and contrast several forms of pre-zygotic and post-zygotic barriers to reproduction.
15- Compare and contrast allopatric and sympatric speciation.
16- Identify factors that can affect the extinction rate of species.
17- Compare and contrast population, community, ecosystem, and biosphere.
18- Define population density.
19- Predict the future growth of a population from its age structure.
20- Compare and contrast the three types of survivorship curves.
11- Describe how DNA sequences can reveal evolutionary relatedness.
12 - Describe the forces that lead to the evolution of new species.
13- Define a biological species.
14- Compare and contrast several forms of pre-zygotic and post-zygotic barriers to reproduction.
15- Compare and contrast allopatric and sympatric speciation.
16- Identify factors that can affect the extinction rate of species.
17- Compare and contrast population, community, ecosystem, and biosphere.
18- Define population density.
19- Predict the future growth of a population from its age structure.
20- Compare and contrast the three types of survivorship curves.
Explanation / Answer
11. Molecular analysis reveals evolutionary relatedness by comparing the DNA of the organisms. More similar DNA sequences, closer the relation.
12. Climatic changes, temperature, availability of food, fitness to survival
13. Biological species are the species that successfully interbreed within a group.
14. Prezygotic barrier: prevention of cross breeding between different species. Post-zygotic barrier: There is no reproductive barrier between different species. They interbreed and form hybrids
15. Allopatric speciation is the evolution of geographically isolated populations into distinct species, whereas sympatric speciation is one of that occurs without physical separation of members of the population
16. Factors like geological transformation, climatic oscillation, deforestation, habitat fragmentation, pollution etc. can affect the extinction rate of species.
17 Population is defined as a group of individuals of a given species that live in a specific geographical area. Community is a group of populations that live in specific area at a given time. Ecosystem is group of communities that live in specific area at a given time. Biosphere is sump of all ecosystems on Earth.
18. Population density is a measurement of population per unit area.
19. To predict the future growth of a population, it is important to its age structure, which is the number of proportions of people at each age in population.
20. Type I: It tells about high age-specific survival probability in early and middle life. The species produce few offspings but parental care is high. Type II: They have roughly constant mortality rates. Type III: They have lowest age-specific survival probability.
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