Which of the following features is not present in jawless fish?

paired fins

lateral line system

gills

notochord

Jawless fish do not have A) Paired Fins.

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Paired fins.

Explanation:

Jawless fish belongs to the superclass agantha and consists of cyclostomes and ostracoderms. The first true vertebrates evolve on the earth is jawless fishes.

The jawless fish do not consist of stomach, jaws and paired fins. Lateral line systems, notochord and gills are present in jawless fish. Two chambered heart is present in jawless fish.

Thus, the correct answer is option (1).

this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.

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.