Which of the following is correct for r-selected species ?

Options

A. Large number of progeny with small size
B. Large number of progeny with large size
C. Small number of progeny with small size
D. Small number of progeny with large size

Answer

To determine which of the following statements is correct for r-selected species, we need to analyze the characteristics of these species.

### Step-by-Step Solution:

1. **Understanding r-selected species**:
- r-selected species are organisms that prioritize high reproductive rates. The "r" in r-selection refers to the intrinsic rate of increase in a population.

2. **Characteristics of r-selected species**:
- They tend to produce a large number of offspring (progeny).
- The offspring are usually of small size.
- They often have a short gestation period.
- These species generally have lower survival rates for their offspring.
- They are typically found in unstable or unpredictable environments where competition is low.

3. **Evaluating the options**:
- **Option A**: Large number of progeny with small size.
- This aligns with the characteristics of r-selected species.
- **Option B**: Large number of progeny with large size.
- This is incorrect as r-selected species produce small-sized offspring.
- **Option C**: Small number of progeny with small size.
- This does not fit the r-selected strategy as they produce many offspring.
- **Option D**: Small number of progeny with large size.
- This describes K-selected species, which focus on fewer offspring with larger size.

4. **Conclusion**:
- The correct option that describes r-selected species is **Option A: Large number of progeny with small size**.

### Final Answer:
**The correct answer is: Large number of progeny with small size (Option A).**