A lack of genetic variability in the species :)
A lack of genetic variability in the species #2
There are currently about 1.4 million identified animal species, and about 1 million of them are insects. Biologists estimate the number of animal species could be as many as 5 million.The total of living plant and animal species is estimated as 8.7 million species. This does not include bacteria which could number in the hundreds of millions of species and subspecies.
Any factor that in nature prevents interbreeding between individuals of the same species or of closely related species, for example geographic separation is itself a reproductive isolation because is a factor that prevents interbreeding. -extinction of one species -production of infertile offspring -development of physical differences
temperature
because different species could mate and make new species which could cause diseases and disabilities in new species.
Yes. If animal in captivity stop breeding then the species would decrease.
Yes, a species is a category used in biological classification to group together organisms that have similar characteristics and can interbreed to produce fertile offspring. Members of the same species are considered to be more closely related to each other than to members of other species.
When people don't try and help, that is probably a big factor as why depression could be a cause of suicide.
If we don't conserve an animal the species number will drastically decrease and resulting in extinction of that particular species. If one species become extinct it could trigger off a chain reaction and many species will be threatened.
Yes, they all can influence continual change in an ecosystem. Any of these could cause an ecosystem to spiral out of control, or could cause it to settle into a new ecosystem depending on the specifics.
Landfills are usual old fields; once a habitat for animals. Picture this: There is this wonderful field with animals, food and a good suppyl of water near by. Then, people cage the animals and start a landfill. If a major supply of a species was there and was taken to a shelter, then this could cause the animal species to be endangered.
One can find information about the origin of animal species on The National Geographic Kids website. One could also Google the animal online and find more information on Wikipedia.