A gene is a basic unit of heredity and a sequence of nucleotides in DNA that encodes the synthesis of a gene product, either RNA or protein. For example, if both of your parents have green eyes, you might inherit the trait for green eyes from them.
Age-related loss of taste can be due to a decreased number of sensory receptors.
Good luck :)
I am going to assume you meant the "first trophic level" of the ecosystem. The first tropic level of an ecosystem is made up of producers, so the answer is C, Acorns.
Yes our lungs will be clean and perfect.
