Mosses, liverworts and ferns can be grouped together because they
A. Are all aquatic plants
B. All grow in deserts
C. Are seedless plants
D. Have undifferentiated plant bodies
Correct Answer:C
Explanation
The correct option is C. Are seedless plants.
Detailed Explanation:
Understanding the Groups:
Mosses, liverworts, and ferns are all types of non-flowering plants that reproduce via spores rather than seeds. This characteristic is fundamental to their classification.
Mosses belong to the group called Bryophytes, which also includes liverworts. Ferns, on the other hand, are classified as Pteridophytes. Despite being in different groups, they share the common trait of being seedless.
Reproductive Structures:
Mosses and Liverworts: These plants reproduce through structures called gametangia, which produce gametes (sperm and eggs). The fertilization occurs in a moist environment, leading to the formation of a sporophyte that produces spores.
Ferns: Ferns also reproduce via spores, which are produced in structures called sporangia, typically found on the undersides of their fronds (leaves). The life cycle of ferns includes a dominant sporophyte stage and a smaller, independent gametophyte stage.
Why Other Options Are Incorrect:
A. Are all aquatic plants: This option is incorrect because while some mosses and liverworts thrive in moist environments, they are not exclusively aquatic. Many species can be found in terrestrial habitats. Ferns also grow in a variety of environments, including forests and grasslands, not just aquatic settings.
B. All grow in deserts: This option is also incorrect. Mosses, liverworts, and ferns generally prefer moist environments. While some plants can survive in desert conditions, these three groups are not adapted to arid climates. In fact, they require a certain level of moisture for reproduction and growth.
D. Have undifferentiated plant bodies: This option is misleading. While mosses and liverworts do have simpler structures compared to flowering plants, they are not entirely undifferentiated. They have specialized structures for photosynthesis, water absorption, and reproduction. Ferns, on the other hand, have well-differentiated leaves (fronds), stems, and roots.
Summary of Key Points:
Mosses, liverworts, and ferns are all seedless plants, which is the primary reason they can be grouped together.
They reproduce via spores, not seeds, which is a defining characteristic of these groups.
They thrive in moist environments, not exclusively aquatic or desert conditions.
While they may have simpler structures compared to flowering plants, they are not entirely undifferentiated.
Revision Summary:
Mosses, liverworts, and ferns are classified as seedless plants.
They reproduce through spores rather than seeds.
They prefer moist environments for growth and reproduction.
They have specialized structures, though simpler than flowering plants.