The image shows a spruce tree, which is a gymnosperm. Which characteristic can be used to classify the tree as a gymnosperm rather than "any other type of seed" plant?

naked seeds
green leaves
thick bark
tall height

Naked Seeds

Explanation:

Gymnosperm means 'naked seed' and these were the earliest trees to evolve. They do not produce flowers and have seeds which are directly exposed to the air for wind pollination. Pine cones are one example. For ease you might think of the gymnosperms as conifers, such as yew and Scots pine.

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