Question map
Not attempted
Correct
Incorrect
★
Bookmarked
Loading…
Q120
(IAS/1994)
Science & Technology › Basic Science (Physics, Chemistry, Biology) › Animal diversity behaviour
Answer Verified
Haemoglobin is dissolved in the plasma of
Result
Your answer:
—
·
Correct:
D
Explanation
Haemoglobin circulates dissolved in the plasma (hemolymph) of many annelids such as earthworms. Annelid blood often contains large extracellular hemoglobins (e.g., hexagonal bilayer hemoglobin) that are free in the coelomic fluid/hemolymph rather than sequestered inside red blood cells [2]. In contrast, vertebrates — including man, fish and frog — package haemoglobin inside erythrocytes (red blood cells), so it is not dissolved in plasma; human haemoglobin is specifically present within RBCs [1], and vertebrate circulatory systems transport oxygen via cellular haemoglobin in erythrocytes. Therefore the correct option is earthworm.
Sources
- [2] https://pmc.ncbi.nlm.nih.gov/articles/PMC6400237/
- [1] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Do You Know? > p. 90
How others answered
Each bar shows the % of students who chose that option.
Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
50%
got it right
✓ Thank you! We'll review this.