.............. have two chambered heart and scaly skin. While ...........have three chambered heart with smooth and moist skin.

Answer

To answer the question, we need to identify the organisms that correspond to the descriptions given for the two blanks.

1. **Identifying the first organism**:
- The first part of the question states that the organism has a **two-chambered heart** and **scaly skin**.
- In the animal kingdom, **fishes** (or **Pisces**) are known to have a two-chambered heart, which consists of one atrium and one ventricle.
- Additionally, fishes typically have scaly skin, which is a characteristic feature of this group.

**Answer for the first blank**: **Fishes (Pisces)**

2. **Identifying the second organism**:
- The second part of the question states that the organism has a **three-chambered heart** and **smooth and moist skin**.
- In the animal kingdom, **amphibians** are known to have a three-chambered heart, which consists of two atria and one ventricle.
- Amphibians also have smooth and moist skin, which is another defining characteristic of this group.

**Answer for the second blank**: **Amphibians**

**Final Answers**:
- The first blank is **Fishes** (Pisces)
- The second blank is **Amphibians**.

---