Organisms that produce large number of small sized offspring are

Options

A. Birds
B. mammals
C. Oysters
D. 1 and 2

Answer

To determine which organisms produce a large number of small-sized offspring, we can analyze the characteristics of the options provided: birds, mammals, and oysters.

**Step 1: Understand the reproductive strategies of the organisms.**
- Birds and mammals typically exhibit a reproductive strategy known as K-selection. This means they invest more time and resources into raising a smaller number of offspring, which tend to be larger in size.
- Oysters, on the other hand, follow a different strategy known as r-selection, where they produce a large number of offspring with little to no parental care, and these offspring are generally small in size.

**Step 2: Analyze the options.**
- **Birds:** Generally produce fewer offspring (e.g., a few eggs) that are larger in size.
- **Mammals:** Similar to birds, they usually have a smaller number of larger offspring (e.g., one or two babies).
- **Oysters:** Produce a vast number of small-sized offspring (e.g., millions of eggs) with minimal parental care.

**Step 3: Conclusion.**
Based on the reproductive strategies and the size of the offspring produced, the correct answer to the question is **oysters**, as they produce a large number of small-sized offspring.

**Final Answer: Oysters.**

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