What is the difference between an artificial system and a natural system?

The two systems of classification commonly used for the identification of the specimens are the artificial system and the natural system.

The artificial system of classification is based on the morphological characters which are considered equal whereas in the natural system the morphological characters which are considered are the floral and sexual characters.

Artificial system includes both habit and habitat for classification whereas the natural selection does not include the habit as a criterion for grouping.

In artificial system, homology is never studied which is done in the natural system of classification.

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.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.