Not always, the toxins may have been absorbed by the body and released in urine
A. Migration (birds migraye to warmer climates during colder months)
Answer:Traits are determined by genes, and also they are determined by the interaction with the environment with genes. And remember that genes are the messages in our DNA that define individual characteristics. So the trait is the manifestation of the product of a gene that is coded for by the DNA.
Explanation:
B. Heart, because the heart circulates blood throughout your body.
