Two animals A and B have similar morphological features and are fundamentally similar with each other, they must be treated as

Options

A. One biological species
B. Two distinct species
C. One biological genera
D. Two distinct genera

Answer

To solve the question, we need to analyze the information provided about the two animals A and B. Here’s a step-by-step breakdown:

### Step 1: Understand the Characteristics
- The question states that animals A and B have similar morphological features and are fundamentally similar.
- Morphological features refer to the physical characteristics of the organisms, such as shape, size, and structure.

**Hint:** Look for definitions of key terms like "morphological features" and "fundamentally similar."

### Step 2: Define Biological Species
- A biological species is typically defined as a group of organisms that can interbreed and produce fertile offspring. They share similar characteristics and genetic makeup.
- Since A and B have similar morphological and fundamental characteristics, they likely belong to the same biological species.

**Hint:** Consider how species are classified based on physical and genetic similarities.

### Step 3: Evaluate the Options
- The options given are:
1. One biological species
2. Two distinct species
3. One biological genus
4. Two distinct genera

- Since A and B are fundamentally similar and share morphological features, they cannot be classified as two distinct species.

**Hint:** Think about what it means for organisms to be classified as distinct species versus the same species.

### Step 4: Eliminate Incorrect Options
- **Two distinct species**: This option is incorrect because A and B are similar.
- **One biological genus**: A genus is a higher taxonomic category that includes multiple species. Since A and B are similar enough to be considered the same species, this option is not applicable.
- **Two distinct genera**: This option is also incorrect for the same reason as above.

**Hint:** Remember that genera contain multiple species, so this option does not fit the scenario.

### Step 5: Conclusion
- The only option that fits the description of animals A and B having similar morphological features and being fundamentally similar is that they must be treated as **one biological species**.

**Final Answer:** One biological species.