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Given below are four statements related ...

Given below are four statements related to the Periplanata americana.
I. Sclerites and present.
II. Heart lies in pericardial sinus of haemocoel.
III. Respiratory organs are trachea.
IV. Blood serves the function of transporting oxygen to body cells.
The information in which alternative is correct regarding the given information?

A

I- True, II-True, III-False, IV-False

B

I- False, II-False, III-True, IV-True

C

I- True, II-True, III-True, IV-False

D

I- False, II-True, III-False, IV-True

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statements about Periplaneta americana (the cockroach) are correct, we will analyze each statement one by one. ### Step-by-Step Solution: 1. **Statement I: Sclerites are present.** - The exoskeleton of cockroaches is made of chitin and consists of hardened plates known as sclerites. These sclerites provide structure and protection to the cockroach. - **Conclusion:** This statement is **correct**. 2. **Statement II: Heart lies in pericardial sinus of haemocoel.** - In cockroaches, the heart is indeed located in the pericardial sinus, which is a part of the haemocoel (the primary body cavity in invertebrates). - **Conclusion:** This statement is **correct**. 3. **Statement III: Respiratory organs are trachea.** - Cockroaches have a tracheal system for respiration, which consists of a network of tubes (tracheae) that deliver oxygen directly to the tissues. - **Conclusion:** This statement is **correct**. 4. **Statement IV: Blood serves the function of transporting oxygen to body cells.** - In cockroaches, the blood lacks respiratory pigments (like hemoglobin) that are typically responsible for oxygen transport in other organisms. Instead, oxygen is transported directly through the tracheal system, not by the blood. - **Conclusion:** This statement is **incorrect**. ### Summary of Statements: - **Statement I:** Correct - **Statement II:** Correct - **Statement III:** Correct - **Statement IV:** Incorrect ### Final Answer: The correct information regarding the statements is that Statements I, II, and III are correct, while Statement IV is incorrect.
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