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Because this is for sexual reproduction, it is hard to distinguish in organisms that reproduce asexually, as well as being the case for bacterial conjugation. and for a strange example see this answer on Yahoo #3: http://answers.yahoo.com/question/index?qid=20100218214618AA0aUCQ
What else can I help you with?
What biological characteristic defines females across species?
The biological characteristic that defines females across species is the presence of two X chromosomes.
The concept that two or more species cannot share the exact same ecological niche for an extended period is called?
This concept is called competitive exclusion principle. It states that two species competing for the same resources cannot coexist in the same place for an extended period of time.
What is a sentence with the word biological evolution?
>The structural and well-organised gradual process of change means 'biological evolution'. >Variation and heridity are two basic factors of evolution. >In long term.evolution leads to existence of new species which have different characteristics than their ancestors.
What two categories of classification are the most specific?
Species and sub-species are the most specific categories of classification in the biological classification system. These categories group organisms based on their genetic and physical similarities at the most detailed level.
What terms refers to one or more populations whose members are capable of interbreeding?
If animals can breed and produce a viable (fertile) offspring they are termed a "species". Often two closely related species can inter-breed and produce an offspring that will be a non-viable (sterile) hybrid. An example of the later would be the cross-breeding of a horse with a donkey.This cross produces a "Mule", which is sterile & unable to reproduce.
What can two organisms not do according to the biological species concept?
According to the biological species concept, two organisms are of different species if they do not do which of these
How is species defined as the biological species concept?
Organisms are the same species if the have the potential, or actually interbreed one with another. Does not apply to all organisms. Bacteria being an example of this. Is not as strong a concept as once it was as it did not adequately address hybridization.
What are Problems in the biological species concept?
There are two main problems that can be identified in the biological species concept. This concept emphiasizes interfertility between organisms. However, reproductive barriers between sexual reproducing species are not always effective. Sometimes, individuals of different species interbreed and produce offspring call hybrids. Also this concept fails to describe species that are predominantly asexual in their reproduction, including all bacteria as well as some protists, fungi, plants, and even a few animals.
What are the limitations of biological species concept?
Paradoxes:* Two organisms "supposed to be"of the same species, and both masculine, cannot breed together, so they can't be of the same species. * If an organism "A" can breed with two other organisms "B" and "C", it means that "A", "B" and "C" all (appear to) belong to a single species, but not necessarily "B" and "C" must be capable of breed together, meaning that "B" and "C" belong to different species.
What biological characteristic defines females across species?
The biological characteristic that defines females across species is the presence of two X chromosomes.
What do you get when you cross a duck with sonny Bono?
When you cross a duck with Sonny Bono, you do not get a physical offspring as ducks and humans are different species and cannot reproduce. The concept of crossing two different species in this manner is not scientifically feasible. It is important to understand the biological limitations of species and reproduction.
When members of a species become separated by geography and loose the ability to interbreed how would scientists classify them?
Scientists would classify these separated members as different species, based on the biological species concept which defines a species as a group of organisms that can interbreed and produce fertile offspring. When geographic isolation prevents interbreeding, the populations may evolve independently and accumulate enough genetic differences to be classified as separate species.
Is Symbiosis is a close relationship between two communities?
Symbiosis is a close and long-term biological interaction between two different biological species. It can involve mutualism (both species benefit), commensalism (one benefits, the other is unaffected), or parasitism (one benefits, the other is harmed).
If two species have similar DNA what hypothesis is supported?
When the DNA is similar between two species it means there is a biological connection to each other.
At what point are two populations descending from the same ancestors considered separate species?
When they have reproductive isolation. This happens when either physical or biological barriers prevent reproduction between the two populations. At that point, their mix of genes will be significantly different that they will be considered two new species.
The concept that two or more species cannot share the exact same ecological niche for an extended period is called?
This concept is called competitive exclusion principle. It states that two species competing for the same resources cannot coexist in the same place for an extended period of time.
Is a competition between two species for food symbiosis relationship?
No, a competition between two species for food is not a symbiotic relationship. Symbiosis is a close and long-term interaction between two different species, where at least one of them benefits. In a competitive relationship, both species are negatively affected as they compete for limited resources.
