Identify the correct sequence with respect to the growth of slime moulds.
(a) Slime moulds `rarr` unfavourable conditions `rarr` plasmodium `rarr` favourable conditions `rarr` spore formation
(b) Slime moulds `rarr` favourable conditions `rarr` spore formation `rarr` unfavourable conditions `rarr` Plasmodium
(c) Slime moulds `rarr` favourable conditions `rarr` Plasmodium `rarr` unfavorable conditions `rarr` Spore formation
(d) Slime moulds `rarr` Unfavourable conditions `rarr` Spore formation `rarr` favourable conditions. `rarr` Plasmodium

Options

A. Slime moulds `rarr` unfavourable conditions `rarr` plasmodium `rarr` favourable conditions `rarr` spore formation
B. Slime moulds `rarr` favourable conditions `rarr` spore formation `rarr` unfavourable conditions `rarr` Plasmodium
C. Slime moulds `rarr` favourable conditions `rarr` Plasmodium `rarr` unfavorable conditions `rarr` Spore formation
D. Slime moulds `rarr` Unfavourable conditions `rarr` Spore formation `rarr` favourable conditions. `rarr` Plasmodium

Answer

To solve the question regarding the growth sequence of slime molds, we need to understand the life cycle and growth conditions of slime molds. Here’s a step-by-step breakdown:

### Step-by-Step Solution:

1. **Understanding Slime Molds**: Slime molds are unique organisms that can exist in two main forms: a vegetative form (plasmodium) and a spore form. Their growth and reproduction are influenced by environmental conditions.

2. **Favorable Conditions**: In favorable conditions, slime molds exhibit a growth phase where they can fuse together. This fusion of amoeboid cells (also known as swarm cells) leads to the formation of a structure called plasmodium. This is a key stage where the slime mold is active and can grow.

3. **Transition to Unfavorable Conditions**: When environmental conditions become unfavorable (e.g., lack of food, moisture), the plasmodium becomes immobile. This is a critical transition point in the life cycle of slime molds.

4. **Spore Formation**: In response to unfavorable conditions, the plasmodium undergoes a transformation to produce spores. These spores are resistant to harsh conditions and can remain dormant until favorable conditions return.

5. **Returning to Favorable Conditions**: Once the conditions improve, the spores can germinate and give rise to new slime molds, restarting the cycle.

### Correct Sequence:
Based on the understanding of the life cycle:
- **Favorable Conditions → Plasmodium → Unfavorable Conditions → Spore Formation**

Thus, the correct sequence is represented by option (c):
**Slime molds → favorable conditions → plasmodium → unfavorable conditions → spore formation.**

### Conclusion:
The correct answer is option (c).

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