Select the incorrect statements

Options

A. Natural selection is a heritable variation & by reproducting leave greater numbr of progemy
B. During stabilisation of natural selection more individuals acquire value other than mean characters value
C. By the time of 500 mollion years agoe invertebrates were formed and were active
D. Reptiles lay thick shelled eggs which do not dry up in sun unlike those of Amphbians

Answer

To solve the question of selecting the incorrect statements, we will analyze each statement one by one based on the information provided in the video transcript.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- The first statement claims that "natural selection is a veritable variation and by reproducing leaves a greater number of progeny."
- Explanation: Natural selection is indeed a mechanism of evolution that involves heritable variations among individuals. Those individuals that are better suited to their environment tend to survive and reproduce more, leading to a greater number of progeny.
- **Conclusion:** This statement is **correct**.

2. **Analyze the Second Statement:**
- The second statement states that "during stabilization of natural selection, more individuals acquire value other than mean character's value."
- Explanation: Stabilizing selection is a type of natural selection that favors the average (mean) trait value and reduces variation. In stabilizing selection, more individuals acquire the mean character value, not values other than the mean.
- **Conclusion:** This statement is **incorrect**.

3. **Analyze the Third Statement:**
- The third statement mentions that "by the time of 500 million years ago, invertebrates were formed and were active."
- Explanation: Fossil evidence indicates that invertebrates were indeed present and active around 500 million years ago, with some being the ancestors of modern groups.
- **Conclusion:** This statement is **correct**.

4. **Analyze the Fourth Statement:**
- The fourth statement asserts that "reptiles lay thick-shelled eggs which do not dry up in the sun unlike those of amphibians."
- Explanation: Reptiles do lay thick-shelled eggs that are designed to retain moisture and protect the developing embryo, which is indeed different from amphibian eggs that are typically more susceptible to drying out.
- **Conclusion:** This statement is **correct**.

### Final Conclusion:
The only incorrect statement among the options provided is the **second statement** regarding stabilizing selection.

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