Answer:
DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies. Differences in the genetic code are the reason why one person has blue eyes rather than brown, why some people are susceptible to certain diseases, why birds only have two wings, and why giraffes have long necks
Explanation:
Food chain and food web both depict the energy flow within the ecosystem because it is about animals Eating each other and thus transferring energy
I think the first blank is human but i have no idea for the second and third, did you get a vocabulary sheet at all?
a scientific model is a model used to test theories. sometimes scientist use rats as a scientific model
