If their karotypes (number of chromosomes) don't match or if they are bred and fail to produce offspring or the offspring are infertile.
Indicator organisms are organisms that are sensitive to changes in the environment. When populations of indicator species changes, it can signal a change in the environment that will eventually effect other species as well.
Indicator organisms are organisms that are sensitive to changes in the environment. When populations of indicator species changes, it can signal a change in the environment that will eventually effect other species as well.
Not necessarily. Organisms that look different can belong to the same species if they can interbreed and produce fertile offspring. Organisms that look similar can also belong to different species if they are reproductively isolated and cannot interbreed successfully.
An analogous organ is a trait that appears similar in unrelated organisms. It indicates that the unrelated organisms are living in similar environments and have evolved similar characteristics to deal with similar problems.
taxonomic key!
Charles Darwin did recognize and categorize numerous species during his career. He also recognized that not all species were identical in all of their outward physical characteristics. He also realized that organisms of the same species were identical. He also observed that organisms living in different places with similar environment were different yet similar, thus concluding that they had the same ancestors.
They are called bellwether species, also known as sentinel species.
A group of similar organisms that can produce fertile offspring are species.
Organisms are grouped into species according to their outer similarities so ducks and geese must vary enough to be categorized differently.
Organisms in a species share more similar characteristics and can interbreed to produce viable offspring, whereas organisms in the same genus may have more differences but still share some common characteristics. Species are a more specific group than genus. Organisms in the same genus are more closely related than organisms in different genera.
Convergent evolution is the form of evolution where different organisms independently evolve similar traits due to similar environmental pressures, even though they are not closely related. This can result in species that appear and behave similarly despite not sharing a recent common ancestor.
Yes, territorial behavior extends to organisms of different species.