Amphibians are not completely free to live on dry land because
a. their ancestors were fish.
b. their food lives exclusively in water.
c. their reproduction depends on water
d. they obtain oxygen from water through gills

Option C

Explanation:

Amphibians are the animals that live on land and spend some part of their life cycle. These organism live on land and partially live inside water during the time of reproduction.

Amphibians lay eggs in water as their eggs are not hard shelled eggs. The females lay eggs in water known as larvae.

They are also known as tade pole that live in water and respire through gills but as they grow old they develop lungs to respire on land.

Hence, the correct answer is Option C

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.

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: