Researchers want to use edna to look for an invasive species in a waterway. which of these steps should they do first?
a. cut dna into small pieces
b. sort dna into bands on a gel
c. precipitate dna in each sample
d. amplify the amount of dna

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: