Assertion: Primary succession occurs over a primarlly bare area where there was no living matter from the very beginning
Reason: During primary succession, reproductive structures of the previous occupants give rise to a new seral community as soon as the conditions become favourable.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that primary succession occurs over a primarily bare area where there was no living matter from the very beginning. This means that primary succession starts in an environment that has not previously supported life, such as after a volcanic eruption or glacial retreat.

2. **Defining Primary Succession**: Primary succession is a type of ecological succession that occurs in lifeless areas. It involves the gradual establishment of a biological community in an area where no soil exists. Examples include newly cooled lava, areas exposed by glacier retreat, and newly formed sand dunes.

3. **Analyzing the Reason**: The reason provided states that during primary succession, reproductive structures of the previous occupants give rise to a new seral community as soon as conditions become favorable. This implies that there are remnants of previous life forms that can contribute to the new community.

4. **Evaluating the Reason**: In primary succession, there are no previous occupants or their reproductive structures present because it starts from a barren environment. Therefore, the assertion is correct, but the reason is incorrect. The pioneer species, which are the first to colonize, do not come from previous occupants but rather from spores or seeds that are carried to the area by wind, water, or animals.

5. **Conclusion**: The assertion is true as primary succession does occur in a bare area with no prior living matter, while the reason is false because it incorrectly suggests that previous occupants contribute to the new community during primary succession.

**Final Answer**: The assertion is correct, but the reason is incorrect.

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