Find the CORRECT chronological order of appearance of angiosperms
(i) Chloropyte ancestors
(ii) Tracheophyte ancestors
(iii) Psilophyton
(iv) Rhynia type plants
(v) Seed ferns
(vi) Progymnosperms

Options

A. i, ii, iii, iv, v, vi
B. i, ii, iv, iii, v, vi
C. i, ii, iv, iii, vi, v
D. i, ii, iii, iv, vi, v

Answer

To find the correct chronological order of the appearance of angiosperms, we need to analyze the sequence of their ancestors. Here’s a step-by-step breakdown:

### Step 1: Identify the first ancestor
The first ancestors of angiosperms are the **Chlorophyte ancestors**. These are green algae that are considered the earliest ancestors of all land plants.

**Hint:** Think about the simplest forms of life that could have given rise to more complex plants.

### Step 2: Identify the second ancestor
Following the Chlorophyte ancestors, the next group is the **Tracheophyte ancestors**. These are vascular plants that evolved after the chlorophytes.

**Hint:** Consider which plants developed vascular tissues for better nutrient and water transport.

### Step 3: Identify the third ancestor
Next, we have **Rhynia type plants**. These are some of the earliest known vascular plants from the Devonian period.

**Hint:** Look for plants that represent a significant evolutionary step in the development of vascular systems.

### Step 4: Identify the fourth ancestor
After the Rhynia type plants, we encounter **Psilophyton**. This is another type of early vascular plant that shares characteristics with both Rhynia and later plants.

**Hint:** Think about plants that have primitive structures and are closely related to the first vascular plants.

### Step 5: Identify the fifth ancestor
The next group is the **Progymnosperms**. These are seedless vascular plants that are considered precursors to gymnosperms.

**Hint:** Consider plants that were the transition between spore-producing plants and seed-producing plants.

### Step 6: Identify the sixth ancestor
Finally, we have the **Seed ferns**. These are an extinct group of seed-producing plants that show characteristics of both ferns and seed plants.

**Hint:** Think about the evolution of plants that began to produce seeds, marking a significant advancement in plant reproduction.

### Conclusion:
Putting it all together, the correct chronological order of appearance of angiosperms is:
1. Chlorophyte ancestors
2. Tracheophyte ancestors
3. Rhynia type plants
4. Psilophyton
5. Progymnosperms
6. Seed ferns

Thus, the correct order is **(i) Chlorophyte ancestors, (ii) Tracheophyte ancestors, (iv) Rhynia type plants, (iii) Psilophyton, (vi) Progymnosperms, (v) Seed ferns**.

### Final Answer:
The correct chronological order is: **(i), (ii), (iv), (iii), (vi), (v)**.