Answer:
3. They digest food externally.
4. They can absorb nutrients from food, even though they lack digestive enzymes.
Explanation:
Fungi are nutritionally heterotrophic, they may be saprophytes, parasites or some are symbionts.
Most of the fungi are saprophytes and get their nutrition by absorbing organic compounds from the environment.
The hypha of the fungus have high surface-area-to-volume ratios so, they are well adapted to absorb nutrients from their environments.
The fungal hypha release of hydrolytic enzymes in the external medium which breaks down large organic molecules such as carbohydrates proteins and fats into smaller molecules. These simple molecules are then absorbed as nutrients into the fungal hyphae.
