Question
Biology Question on body fluids and circulation
In which of the following animals Hb is found dissolved in plasma?
A
Earthworm
B
Cockroach
C
Sepia
D
Planaria
Answer
Earthworm
Explanation
Solution
In earthworm, plasma of blood contains haemoglobin and therefore blood is red in colour. The blood corpuscles are nucleated. The blood of cockroach is colourless due to the lack of respiratory pigment. Sepia (cuttle fish) belongs to phylum-Mollusca, and the blood contains respiratory pigment haemocyanin. Planaria belongs to phylum Plaiyhelminthes.