Question

The growth of Lichens on barren rocks is followed by the growth of

• A. Moss.
• B. Ferns.
• C. Gymnosperms.
• D. Algae.

Answer 1

The correct option is A

Moss.

The correct option is A.

Explanation for the correct option:

1. Ecological succession refers to the process of community development over time in which species in one stage are replaced by other species.
2. There are two types of succession: primary succession and secondary succession.
3. Certain early-successional species, such as lichens, are frequently the first organisms to colonize an area that will undergo primary succession.
4. Once new soil has formed in an area, it gradually gives way to mild-successional species such as mosses and grasses, which in turn give way to late-successional species much later.

Explanation for the incorrect options:

Option B:

1. Ferns are leafy vascular plants.
2. While they have veins that allow water and nutrients to flow, their life cycle is very different from that of conifers and flowering plants.
3. Conifers and flowering plants have evolved to thrive in harsh, arid environments.
4. Ferns require water in order to reproduce sexually.
5. Ferns can reproduce asexually through a variety of means in the absence of water.

Option C:

1. Gymnosperm seeds are not protected by an outer coating or shell.
2. They do not produce flowers.
3. They produce no fruit.
4. They can be found in colder climates with snowfall.
5. They develop needle-like branches.

Option D:

1. Algae are a type of organism that is mostly aquatic, nucleus-bearing, and photosynthetic.
2. Algae, unlike plants, lack stems, leaves, roots, and reproductive structures.
3. Algae are made up of cells that are not found in plants or animals.
4. Even the photosynthesis pigments differ greatly from those found in plants.

Final answer: The growth of Lichens on barren rocks is followed by the growth of moss.