What characteristic of the species level of organization distinguishes two similar organisms such as ducks and geese as different species? why must you do this to us?(let us be bro)

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

What maintain homeostasis when a persons internal body temperature is 97.5°f

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?