Which of these has not evolved from Psilophyton?

Options

A. Sphenopsids
B. Ferns
C. Arborescent Lycopods
D. Ginkgos

Answer

To determine which of the options has not evolved from Psilophyton, we first need to understand the evolutionary relationships among early vascular plants.

### Step 1: Understand Psilophyton
Psilophyton is an ancient vascular plant that existed during the Devonian period. It is considered one of the earliest vascular plants and is significant in the study of plant evolution.

**Hint:** Psilophyton is a key plant in understanding the evolution of vascular plants.

### Step 2: Identify Related Plants
From Psilophyton, several groups of vascular plants evolved. These include ferns and ginkgo, which are both derived from this lineage.

**Hint:** Look for plants that are known to have evolved directly from Psilophyton.

### Step 3: Examine the Options
Among the options provided, we need to identify which plant does not share a direct evolutionary lineage with Psilophyton. The options include:
1. Ferns
2. Ginkgo
3. Arborescent Lycopores
4. Others (not specified)

**Hint:** Focus on the evolutionary history of each plant type.

### Step 4: Identify the Odd One Out
Arborescent Lycopores, also known as tree-like lycopods, did not evolve from Psilophyton. Instead, they evolved from Zosterophyllum, another group of early vascular plants that branched off before the lineage leading to ferns and ginkgo.

**Hint:** Remember that Arborescent Lycopores are linked to Zosterophyllum, not Psilophyton.

### Step 5: Conclusion
Based on the evolutionary relationships, the correct answer to the question of which plant has not evolved from Psilophyton is Arborescent Lycopores.

**Final Answer:** Arborescent Lycopores.