Consider the following statements about Sea Urchins1. Marine creatures like starfish and sea cucumbers belong to Sea urchins group.2. They are herbivorous, primarily feeding on algae and plant material.Choose the incorrect statements:a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer?

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Consider the following statements about Sea Urchins

1. Marine creatures like starfish and sea cucumbers belong to Sea urchins group.
2. They are herbivorous, primarily feeding on algae and plant material.
Choose the incorrect statements:

a)
1 only
b)
2 only
c)
Both 1 and 2
d)
Neither 1 nor 2

Correct answer is option 'D'. Can you explain this answer?

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Consider the following statements about Sea Urchins1. Marine creatures...

Incorrect Statement Explanation

Sea urchins are fascinating marine creatures that have distinct characteristics and feeding habits. Let's examine the given statements to identify the incorrect one:

1. Marine creatures like starfish and sea cucumbers belong to Sea urchins group:
- This statement is incorrect because sea urchins are a separate group of marine animals that are not related to starfish or sea cucumbers. Sea urchins belong to the phylum Echinodermata, while starfish belong to the class Asteroidea and sea cucumbers belong to the class Holothuroidea.

2. They are herbivorous, primarily feeding on algae and plant material:
- This statement is accurate. Sea urchins are herbivores that primarily feed on algae and plant material found in their marine habitats. Their feeding habits play a crucial role in maintaining the balance of marine ecosystems.

Therefore, the incorrect statement is:
- Option d) Neither 1 nor 2

By understanding the unique characteristics and feeding habits of sea urchins, we can appreciate the diversity and importance of these fascinating marine creatures in the oceans.

Answered by Notes Wala · View profile

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Community Answer

Consider the following statements about Sea Urchins1. Marine creatures...

Statement 1 is Correct:

Sea urchins belong to a group of marine invertebrates called echinoderms, which means spiny-skinned animals.
It includes other well-known marine creatures like starfish and sea cucumbers.
Sea urchins are characterized by their spherical to somewhat flattened, spiny bodies, and they are found in oceans worldwide, from shallow coastal waters to deep-sea environments.
They live on the ocean floor, usually on hard surfaces, and use tube feet or spines to move about.
The largest urchin (known from a single specimen) is Sperostoma giganteum of deep waters off Japan.

Statement 2 is Correct:
Features:

They have a globular body and a radial arrangement of organs, shown by five bands of pores running from mouth to anus over the test (internal skeleton).
The pores accommodate tube feet, which are slender, extensible, and often sucker-tipped.
They have a hard exoskeleton, or test, made up of interlocking plates or ossicles, which are often covered with movable spines.
From nodules on the test arise long, movable spines and pedicellariae (pincerlike organs); these structures may have poison glands.

Feeding:

They are herbivorous, primarily feeding on algae and plant material.
They use their specialized mouthparts, called Aristotle’s lantern, to scrape algae and other food sources from rocks or the seafloor.

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Consider the following statements about Sea Urchins1. Marine creatures like starfish and sea cucumbers belong to Sea urchins group.2. They are herbivorous, primarily feeding on algae and plant material.Choose the incorrect statements:a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'D'. Can you explain this answer?

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