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.
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.
Era
A biological species.
A group of similar organisms that can produce fertile offspring are species.
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.
Organisms are grouped into species according to their outer similarities so ducks and geese must vary enough to be categorized differently.
Organisms are grouped into species according to their outer similarities so ducks and geese must vary enough to be categorized differently.
species
Yes, territorial behavior extends to organisms of different species.