Question

choice: select the best answer for each question below. the gene pool of two populations are separated, the populations may develop into a new species. this is called: a. natural selection b. speciation c. genetic separation d. interspecific competition the kaibab squirrel became its own species when a small population was isolated on the northern rim of the grand canyon. which type of speciation is this? a. behavioral isolation b. mechanical isolation c. temporal isolation d. geographic isolation 20 different species of galagos, also known as bushbabies, are found in africa. even though various species of galagos share habitats, they cannot interbreed with one another because of their differently structured genitalia. which type of speciation is this? a. behavioral isolation b. mechanical isolation c. temporal isolation d. geographic isolation an ecologist is discussing two animals’ ability to reproduce with one another. which is he talking about? a. natality b. fecundity c. fertility d. mortality which is not true about animal species? a. animals of the same species can interbreed and reproduce b. endangered species are in immediate jeopardy of extinction c. individual species are well documented on a central registry d. some species have been protected through trade restrictions which type of strategists would you expect to have low levels of prenatal care and a short life expectancy? a. k strategists b. s strategists c. r strategists d. j strategists

Explanation:

1. Speciation is the process by which new species form when gene - pools are separated. Natural selection is about survival and reproduction based on traits, genetic separation is a part of the process but not the overall term, and interspecific competition is about competition between species.
2. The Kaibab squirrel's isolation on the northern rim of the Grand Canyon is due to a geographical barrier, which is geographic isolation. Behavioral isolation is due to behavior differences, mechanical isolation is due to physical incompatibility, and temporal isolation is due to different breeding times.
3. Galagos not being able to interbreed due to differently structured genitalia is mechanical isolation.
4. Fertility refers to the ability of two animals to reproduce with one another. Natality is the birth rate, fecundity is the potential reproductive capacity, and mortality is the death rate.
5. Individual species are not well - documented on a central registry. Animals of the same species can interbreed, endangered species are at risk of extinction, and some species are protected by trade restrictions.
6. R - strategists have low levels of prenatal care and short life expectancies. K - strategists have high parental investment and long life spans, and there are no S and J strategists in this context.

Answer:

1. b. speciation
2. d. geographic isolation
3. b. mechanical isolation
4. c. fertility
5. c. individual species are well documented on a central registry
6. c. R Strategists