Consider the following statements (i-iv) each with two blanks .
(i) Jellyfish exhibits (A) symmetry whereas cuttle fish exhibits (B) symmetry .
(ii) Incomplete gut is present in (C ) whereas complete gut is present in (D)
(iii) Closed circulatory is present (E ) whereas open circulatory system is present in (F)
(iv) Flatworms are (G) whereas roundworms are (H)
Which one of the following options , gives the correct fill - ups for both the blank numbers one of the above statements ?

Options

A. A: bilateral , B : radial
B. C : roundworms , D : flatworm
C. E: silkworm ,F earthworm
D. G: acoelomates , H : pseudocoelomates

Answer

To solve the question, we need to fill in the blanks for each of the four statements based on our knowledge of the animal kingdom. Let's analyze each statement step by step:

### Step 1: Analyze Statement (i)
**Statement:** Jellyfish exhibits (A) symmetry whereas cuttlefish exhibits (B) symmetry.

- **Jellyfish:** Belongs to the phylum Cnidaria and exhibits **radial symmetry**.
- **Cuttlefish:** Belongs to the phylum Mollusca and exhibits **bilateral symmetry**.

**Fill in the blanks:**
(A) radial, (B) bilateral

### Step 2: Analyze Statement (ii)
**Statement:** Incomplete gut is present in (C) whereas complete gut is present in (D).

- **Incomplete gut:** Found in **flatworms** (phylum Platyhelminthes), which have a single opening for both ingestion and excretion.
- **Complete gut:** Found in **roundworms** (phylum Nematoda), which have a distinct mouth and anus.

**Fill in the blanks:**
(C) flatworms, (D) roundworms

### Step 3: Analyze Statement (iii)
**Statement:** Closed circulatory system is present in (E) whereas open circulatory system is present in (F).

- **Closed circulatory system:** Found in **earthworms** (phylum Annelida), which have blood vessels.
- **Open circulatory system:** Found in **insects** (like silkworms) and some other arthropods.

**Fill in the blanks:**
(E) earthworms, (F) insects

### Step 4: Analyze Statement (iv)
**Statement:** Flatworms are (G) whereas roundworms are (H).

- **Flatworms:** Are **acoelomates** (they lack a body cavity).
- **Roundworms:** Are **pseudocoelomates** (they have a body cavity that is not fully lined by mesoderm).

**Fill in the blanks:**
(G) acoelomates, (H) pseudocoelomates

### Summary of the Fill-ups:
1. (A) radial, (B) bilateral
2. (C) flatworms, (D) roundworms
3. (E) earthworms, (F) insects
4. (G) acoelomates, (H) pseudocoelomates

### Correct Answer:
The correct fill-ups for both blanks in statement (iv) are:
(G) acoelomates, (H) pseudocoelomates.