The diagram here is called a trophic pyramid. It shows trophic levels of a grassland habitat. The size of each trophic level represents biomass, with
producers representing the largest amount of biomass. Which of the following
best explains the unique shape of the trophic pyramid?

coal is not sustainable because it will one day run out.

answer; the above answer to the above statement is (true)

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: