Answer:
The answer "to obtain an average that accurately represents fish from this area
" should be the answer because a large sample size is crucial for being a good representation of the whole population, and by taking many samples from each fish scientists can then determine the average mercury concentration within each fish, which then allow them to give a good estimate of the mercury concentration in the fish population because of their sufficient sample size.
Explanation:
When round worms eat dirt/small particles or the drink liquid. the do have a mouth.
The solutions would be a, b, e, f.
1. The hind limbs tend to be sturdier and stronger
2. Hind limbs are more firmly attached to the spine
