they are caused by mutation. the best example of it are human blood groups.
Overexploitation, Habitat loss, invasive species, climate change
Answer: refer to, uofmhealth.org/health-library/tx4097abc
Explanation:
you should find your answer there
<span>Accurately
describes the scientific theory is to provide a systematic way for obtaining
evidence to support or refute a hypothesis. Correctly describes a scientific
hypothesis it is an educated guess that loses credibility if it is falsifiable and
fact is something that is been observed or experienced by many observers and
agreed to be true.</span>