How many of the following statements are incorrect for parasites
(A) Presence of un-necessary sense organs
(B) Presence of adhesive organs & suckers
(C) Developed digestive system
(D) High biotic potential

Answer

To determine how many of the statements regarding parasites are incorrect, let's analyze each statement one by one:

**Step 1: Analyze Statement A - Presence of unnecessary sense organs**
- Parasites are generally adapted to live within a host and are highly specialized. They often lose unnecessary sense organs because they do not need to sense their environment outside the host. Therefore, this statement is **incorrect**.

**Step 2: Analyze Statement B - Presence of adhesive organs & suckers**
- Many parasites, such as tapeworms, have developed adhesive organs and suckers that allow them to attach to the host's tissues. This adaptation is essential for their survival and nutrient absorption. Thus, this statement is **correct**.

**Step 3: Analyze Statement C - Developed digestive system**
- Parasites typically do not have a fully developed digestive system because they absorb nutrients directly from their host. If they had a developed digestive system, they would not be classified as parasites. Therefore, this statement is **incorrect**.

**Step 4: Analyze Statement D - High biotic potential**
- Parasites often exhibit high biotic potential, meaning they can reproduce rapidly and in large numbers. This allows them to thrive within a host. Thus, this statement is **correct**.

**Final Evaluation:**
- From the analysis:
- Statement A: Incorrect
- Statement B: Correct
- Statement C: Incorrect
- Statement D: Correct

**Total Incorrect Statements: 2 (A and C)**

**Final Answer: 2**

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