which group of seed producers are the largest, most massive and oldest in the world?

angiosperms or gymnosperms?

Angiosperms

To determine which group of seed producers is the largest, most massive, and oldest in the world, we need to compare angiosperms and gymnosperms.

Angiosperms are flowering plants that produce seeds. They are the most diverse group of plants and have evolved around 140 million years ago. Angiosperms are found in various habitats worldwide and have adapted to different climates and environments. They produce seeds enclosed in fruits or seed pods.

Gymnosperms, on the other hand, include plants like conifers, cycads, ginkgoes, and gnetophytes. They do not produce flowers or fruits, but instead, their seeds are exposed on the surface of specialized structures like cones. Gymnosperms evolved earlier than angiosperms, around 320 million years ago, making them older.

Now, when it comes to size or mass, it's important to note that angiosperms generally have a more diverse range of sizes and masses. They include both the largest and the smallest plants on Earth. Some angiosperms, like giant sequoias or eucalyptus trees, can reach massive sizes. However, gymnosperms, particularly conifers, also display significant size and mass, such as the giant redwoods or the pines.

Regarding the largest, most massive, and oldest group, we can consider gymnosperms, particularly the conifers, which include giants like sequoias and redwoods. These gymnosperms can reach impressive sizes and have a long evolutionary history, making them some of the oldest living organisms on Earth.

In summary, while angiosperms are the most diverse group of plants and exhibit a wide range of sizes, gymnosperms, namely conifers, are the largest, most massive, and oldest group of seed producers in the world.