Deletion- the fact that a codon is missing implies that the nucleotides were deleted.
Answer:its " with monitoring, the concentration of every pollutant has decreased."
Explanation: just took it on Ap3x
B) i’m pretty sure it’s cholecystojejunostomy
Trophic levels go by,
Producer (The nuts)
Primary Consumer (Squirrels)
Secondary Consumer (Raccoons)
Tertiary Consumer (Bear)
So squirrels would be at a lower trophic level.
Hope his help :)