The correct option is B. Whistling pine.
Detailed Explanation:
Understanding Seed Bearing:
Seed-bearing plants are classified as seed plants or spermatophytes. These plants reproduce through seeds, which are structures that contain the embryo of the plant and are capable of developing into a new plant under suitable conditions. Seed plants are further divided into two main groups: gymnosperms (like pines) and angiosperms (flowering plants).
Analyzing the Options:
A. Mosses: Mosses are non-vascular plants that belong to the group called bryophytes. They reproduce via spores, not seeds. Mosses have a life cycle that includes a dominant gametophyte stage and a sporophyte stage, but they do not produce seeds.
B. Whistling pine: This is a common name for certain species of pine trees, which are gymnosperms. Gymnosperms are characterized by their production of seeds that are not enclosed in an ovary (as in angiosperms). Instead, the seeds are often found on the surface of cones. Therefore, whistling pine is indeed a seed-bearing plant.
C. Algal filament: Algal filaments refer to structures formed by certain types of algae, which are primarily aquatic and photosynthetic organisms. Algae reproduce through spores or fragmentation, not seeds. They do not have the complex structures associated with seed-bearing plants.
D. Liverwort: Liverworts are also non-vascular plants and belong to the bryophyte group, similar to mosses. They reproduce via spores and do not produce seeds. Liverworts have a simple structure and life cycle that does not involve seed formation.
Why Other Options Are Incorrect:
Mosses (A): As mentioned, they reproduce via spores and lack seeds, making them non-seed-bearing.
Algal filament (C): Algae reproduce through asexual and sexual means that do not involve seeds, thus they are not seed-bearing.
Liverwort (D): Like mosses, liverworts reproduce via spores and do not produce seeds, confirming they are not seed-bearing.
Summary of Key Points:
Whistling pine is a seed-bearing plant (gymnosperm).
Mosses, liverworts, and algal filaments reproduce via spores, not seeds.
Seed-bearing plants are crucial for understanding plant reproduction and evolution.
Revision Summary:
Seed-bearing plants are classified as gymnosperms and angiosperms.
Whistling pine is a gymnosperm that produces seeds.
Mosses, liverworts, and algal filaments reproduce via spores, not seeds.
Understanding plant classification helps in identifying reproductive strategies.