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Read the following match about phylum an...

Read the following match about phylum and it's one character :
I. Annelida : First- time true coelom (schizocoelom) present in them.
II. Arthropoda : Only metamerically segmented animals with haemocoel.
III. Echinodermata : Have exoskeleton of calcareous ossicles and spines .
IV. Hemichordata : Small worm-like marine animals with the notochord.
How many from the above is/are correct

A

Two

B

Three

C

Four

D

One

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze each statement about the phyla and determine if they are correct or incorrect. ### Step-by-Step Solution: 1. **Analyzing Annelida:** - The statement claims that Annelida has the first true coelom (schizocoelom) present in them. - **Explanation:** Annelids are indeed the first group of animals to possess a true coelom, which is a body cavity fully lined by mesoderm. This statement is correct. 2. **Analyzing Arthropoda:** - The statement claims that Arthropoda are the only metamerically segmented animals with haemocoel. - **Explanation:** While Arthropoda are metamerically segmented and possess a haemocoel (a body cavity filled with blood), they are not the only metamerically segmented animals. Other groups, such as Annelida, also exhibit metameric segmentation. Therefore, this statement is incorrect. 3. **Analyzing Echinodermata:** - The statement claims that Echinodermata have an exoskeleton of calcareous ossicles and spines. - **Explanation:** Echinoderms actually possess an endoskeleton made of calcareous ossicles and spines, not an exoskeleton. Thus, this statement is also incorrect. 4. **Analyzing Hemichordata:** - The statement claims that Hemichordata are small worm-like marine animals with a notochord. - **Explanation:** Hemichordates do not possess a true notochord. They are worm-like marine animals, but they lack this feature, making this statement incorrect. ### Conclusion: - From the analysis: - **Correct Statements:** 1 (Annelida) - **Incorrect Statements:** 3 (Arthropoda, Echinodermata, Hemichordata) Thus, the total number of correct statements is **1**. ### Final Answer: - The answer is **1**. ---
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