A mutation was found in which the DNA sequence changed from 5' CCCGGGAGA 3' to 5' CCCAGA 3' What kind of mutation is this?
Frame-shift
Deletion
Insertion
Substitution
2

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs