Differentiate between gametangial contact and gametangial copulation.

Explanation

To differentiate between gametangial contact and gametangial copulation, we can break down the definitions and processes involved in each method of plasmogamy.

### Step-by-Step Solution:

1. **Definition of Gametangial Contact**:
- In gametangial contact, the male and female gametangia (the structures that produce gametes) come into contact with each other.
- The male nuclei from the male gametangium (antheridium) transfer into the female gametangium (oogonium) through a pore at the point of contact or via a fertilization tube.

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