Two related species of frogs appear very similar , but they have different mating calls. In addition , one species breeds in the fall and the other breeds in the spring . What mechanisms contribute to reproductive isolation of these species ?

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.

b.have there own function.

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds