Correct Option
The correct option isFungi reproduce exclusively through sexual reproduction.
Explanation
Fungi exhibit a versatile reproductive cycle involving vegetative, asexual, and sexual methods. This adaptability allows them to propagate effectively across diverse environmental conditions. The mode of reproduction often depends on the availability of nutrients and environmental stress.
Option Analysis
- Fungi can grow from spores present in the air. is Correct: Fungal spores are lightweight and ubiquitous in the air. When these spores land on suitable substrates-specifically those that are warm and humid-they germinate and grow into new fungal hyphae.
- Spores are typically released from a sporangium. is Correct: In many fungi, such as Rhizopus (bread mould), asexual spores are produced inside a specialized sac-like structure called a sporangium. Upon maturity, the sporangium bursts to release the spores.
- Fungi reproduce exclusively through sexual reproduction. is Incorrect: Fungi do not reproduce exclusively through sexual reproduction. They extensively utilize asexual methods such as the formation of spores (conidia, sporangiospores), budding (in yeast), and fragmentation. Sexual reproduction usually occurs under specific conditions to introduce genetic variation.
- Spores possess a hard coat to survive unfavourable conditions. is Correct: Spores are asexual reproductive bodies designed for survival. They are encased in a hard protective coat that enables them to withstand unfavourable conditions such as high temperatures and low humidity until favourable conditions return.
Key Takeaway: Fungi are not limited to a single mode of reproduction; they reproduce through vegetative means (fragmentation), asexual means (spore formation, budding), and sexual means.