|
How many hearts are found in earthworm? |
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|
a) |
8 (four pairs) |
b) |
2 (one pair) |
c) |
6 (three pairs) |
d) |
12 (six pairs) |
|
How many hearts are found in earthworm? |
|||||||
|
a) |
8 (four pairs) |
b) |
2 (one pair) |
c) |
6 (three pairs) |
d) |
12 (six pairs) |
(a)
In each of the segments, 7, 9, 12 and 13 of earthworm, a pair of large, thick, rhythmically contractile vertical vessels celled hearts are present, i.e., four pairs of hearts are present.