Which of the following statements is/are correct ?
1. Most of the animals that live on the seafloor lack a backbone .
2. Animals that live on the seafloor have lungs.

Select the correct answer using the code given below:
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Question

Which of the following statements is/are correct ?
1. Most of the animals that live on the seafloor lack a backbone .
2. Animals that live on the seafloor have lungs.

Select the correct answer using the code given below:
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

ONLiNE UPSC · Accepted Answer

Statement 1 is correct: Most animals that live on the seafloor lack a backbone. Many seafloor-dwelling animals, such as mollusks, echinoderms, and arthropods, are invertebrates, meaning they do not have a backbone.

Statement 2 is not correct : While some seafloor animals may have a backbone, many of them do not.Most marine invertebrates lack gas-filled body compartments (like lungs in humans) that would collapse at high pressure. Thus, most deep-sea organisms would die in tropical temperatures or if they were kept in an aquarium. They would need to be kept in special pressurized tanks.Additionally, not all animals that live on the seafloor are without lungs. For example, certain marine animals like fish (which have backbones) have gills instead of lungs.

Marine Biology

Animals living on the seafloor

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M Question 1	⏱ 0
Which of the following statements is/are correct ? 1. Most of the animals that live on the seafloor lack a backbone . 2. Animals that live on the seafloor have lungs. Select the correct answer using the code given below: (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2