Question

Select the correct statement.

A. Gymnosperms are both homosporous and heterosporous.

B. Salvinia, Ginkgo and Pinus all are gymnosperms.

C. Sequoia is one of the tallest trees.

D. The leaves of gymnosperms are not well adapted to the extremes of climate.

Answer 1

Hint: The largest trees on Earth are giant Sequoia. Typically, the term Sequoia is referred to as Sequoiadendron giganteum, naturally found only in the woodlands on the western slopes of the California Sierra Nevada Mountains.

Complete answer:

Gymnosperms are flowerless plants containing cones and seeds. The word 'gymnosperm' means "naked seed" since the seeds of gymnosperm are not contained in an ovary. They are instead exposed to leaf-like structures known as bracts. Gymnosperms include cycads, conifers, gnetophytes, and Ginkgo. They are vascular plants in the Embryophyta group. The pines, spruces, fir trees and Ginkgo are some of the most visible shrubs and trees. In temperate forests and boreal biomes forest gymnosperms abound with species able to tolerate dry or damp conditions.

The hugest individual trees in the world are giant Sequoia. Their diameters range from 6 to 8 m. Their average height is 50-85 meters. At 94.8 m tall, record trees were assessed. 17 m trunk diameter was calculated by data taken out of context, Study estimates. The general grant tree at 8.8 m is the most commonly recognized specimen at breast height. Around 2014 and 2016, coastal redwood species have been described as having a larger trunk diameter than all known giant Sequoias. The trunks of the redwood coast are smaller in height than the trunks of giants and are larger in diameter at greater heights and more columnar trunks.

Thus, the correct answer is option C. i.e., Sequoia is one of the tallest trees.

Note: Gymnosperms are heterosporous. Ginkgo and Pinus are examples of gymnosperms but Salvinia is an example of pteridophyte. The leaves of gymnosperms are well adapted to the extreme conditions of climate.