Which of the following are examples of specialized plant structures?

Specialized plant structures serve specific functions that are crucial for the survival and reproduction of plants. Tubers and rhizomes are prime examples of such structures. Tubers, like potatoes, function primarily as storage organs, allowing the plant to store energy in the form of starch. This adaptation helps the plant survive through adverse conditions like winter or drought by drawing on its stored nutrients for growth when favorable conditions return.

Rhizomes, on the other hand, are underground stems that serve as a means of vegetative reproduction and also can store nutrients. By spreading horizontally below the soil surface, rhizomes can produce new shoots and roots, leading to the establishment of new plants. This method of reproduction allows the plant to colonize an area and can provide resilience.

The other options each include plant structures that generally serve more common functions within the plant, such as photosynthesis, support, or reproduction, but are not classified as specialized structures in the same way that tubers and rhizomes are.