Class mammalia cosists of

Options

A. Order carnivora only
B. Families like felidae and canidae only
C. Related orders like carnivora, primata, etc
D. All animals belonging to various phyla

Answer

**Step-by-Step Solution:**

1. **Understanding the Classification of Mammals:**
- The class Mammalia is part of the larger classification system in biology. It falls under the kingdom Animalia and the phylum Chordata.

2. **Identifying the Class:**
- Class Mammalia includes all mammals, which are characterized by features such as mammary glands, hair or fur, and three middle ear bones.

3. **Recognizing Orders within Class Mammalia:**
- Within the class Mammalia, there are various orders. Two prominent orders are:
- **Order Carnivora:** This includes carnivorous mammals like dogs (Canidae) and cats (Felidae).
- **Order Primata:** This includes primates such as monkeys, apes, and humans.

4. **Identifying Families within Orders:**
- Each order contains different families. For example:
- **Family Felidae:** This family includes cats.
- **Family Canidae:** This family includes dogs.
- **Family Hominidae:** This family includes great apes and humans.

5. **Evaluating the Options Given in the Question:**
- The options provided in the question need to be evaluated based on the classification discussed:
- **Option 1:** "Order Carnivora only" - Incorrect, as Mammalia includes more than just Carnivora.
- **Option 2:** "Families like Felidae and Canidae only" - Incorrect, as it excludes other families like Hominidae.
- **Option 3:** "Related orders like Carnivora, Primata, etc." - Correct, as it acknowledges multiple orders within Mammalia.
- **Option 4:** "All animals belonging to the various phyla" - Incorrect, as Mammalia specifically belongs to the phylum Chordata.

6. **Conclusion:**
- The correct answer is that the class Mammalia consists of related orders like Carnivora, Primata, etc.