Question

18. Which of the following statements is incorrect
about the circulatory system of earthworm?
(1) Pheretima represents a closed type of blood
vascular system
(2) Blood glands are present in 4th, 5th and 6th
segments, they produce blood cells and
haemoglobin dissolved in plasma
(3) There are fours pairs of hearts in earthworm
present in 7, 9, 12 and 13 segments
(4) In dorsal vessel blood flows in forward directio​

Answer 1

Answer:

c is incorrect

Explanation:

because five pairs of hearts are present