DENDROLOGY

Detailed explanation-1: -The largest group of gymnosperms are conifers, which comprise giant trees that can reach up to the height of 110 meters. They are the largest group due to the presence of six-hundred and thirty species of the total eight-hundred and sixty species of gymnosperms found on the planet.

Detailed explanation-2: -The largest group of living gymnosperms are the conifers (pines, cypresses and relatives) and the smallest is ginkgo, a single living plant species found in China.

Detailed explanation-3: -Gymnosperms are a smaller, more ancient group, and it consists of plants that produce “naked seeds” (seeds that are not protected by a fruit). There are more than 1, 000 species of gymnosperms still found on Earth.