Answer:
They are called alleles.
Explanation:
Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits.
Answer:
voluntary, you did it by will
Explanation:
To bring oxygen in the body because it is a respiratory organ fish
Salt marshes are diverse ecosystems because there are resources from both
These interactions are called symbiosis. The impacts of symbiosis can be positive, negative, or neutral for the individuals involved. Organisms often provide resources or services to each other; the interaction is mutually