Question

Which of the following traits characterizes gymnosperms? A The plants carry exposed seeds on modified leaves. B Reproductive structures are located in a flower. C After fertilization, the ovary thickens and forms a fruit. D The gametophyte is longest phase of the life cycle.

Answer 1

A) option is correct

Explanation:

The plants carry exposed seeds on modified leaves is a characteristic of gymnosperms

• Gymnosperms are simply flowerless plants that produce cones and seeds
• The term gymnosperm means "naked seed," as its seeds are not encased within an ovary,they sit exposed on the surface of leaf-like structures called bracts
• Gymnosperms are vascular plants of the subkingdom Embryophyta and include conifers, cycads, ginkgoes, and gnetophytes
• Some examples of these woody shrubs and trees include pines, spruces, firs, and ginkgoes
• Gymnosperms are abundant in temperate forest and boreal forest biomes with species that can tolerate moist or dry conditions
• Unlike angiosperms, gymnosperms do not produce flowers or fruit. they the first vascular plants to inhabit the land appearing in Triassic Period of geological time scale around 245-208 million years ago
• In today's era there over one thousand species of gymnosperms which belongs to four main divisions: Coniferophyta, Cycadophyta, Ginkgophyta, and Gnetophyta