Plant Classification — Set 1

Correct Answer: C. Bryophyta

The correct answer is 'Bryophyta'. Bryophytes are called amphibians because they live on land but require water for sexual reproduction. They lack true vascular tissues like xylem and phloem for water transport. Mosses and liverworts are common examples of this group.

Correct Answer: C. Thallophyta

Thallophyta includes plants with a simple body structure called a thallus that lacks roots or stems. Algae are the primary representatives of this division in the plant kingdom. These plants are predominantly aquatic in nature.

Correct Answer: A. Pteridophyta

The correct answer is 'Pteridophyta'. Pteridophytes are the first land plants to develop xylem and phloem for conducting water and minerals. They reproduce via spores rather than seeds and do not produce flowers. Ferns and horsetails are well-known members of this category.

Correct Answer: C. Naked seeds

Gymnosperms produce seeds that are not enclosed within a fruit or an ovary. The term itself is derived from Greek words meaning 'naked' and 'seed'. Pine, Cedar, and Cycas are typical examples of gymnosperms.

Correct Answer: A. Angiosperms

Angiosperms are seed-bearing plants where the seeds develop inside an organ which later becomes a fruit. They are the most diverse and widespread group of plants on Earth today. These plants undergo a unique process known as double fertilization.

Correct Answer: D. Moss

Moss belongs to Bryophyta and lacks specialized vascular tissues for the internal transport of fluids. They absorb water and nutrients primarily through their leaves. Mosses help in preventing soil erosion by forming dense mats on the ground.

Correct Answer: C. Cotyledons

Cotyledons are the embryonic leaves found within the seed of a plant. Monocots have one cotyledon while dicots possess two in their seeds. This classification also relates to their leaf venation and root systems.

Correct Answer: C. Pteridophyta

The correct answer is 'Pteridophyta'. Cryptogams like pteridophytes have inconspicuous reproductive organs and reproduce through spores. The name implies 'hidden reproduction' because they do not produce visible seeds or flowers. Thallophytes and bryophytes also fall under the cryptogam category.

Correct Answer: A. Maize

Maize is a monocot because its seed contains only one embryonic leaf or cotyledon. It typically shows parallel venation in its leaves and a fibrous root system. Wheat and rice are other important examples of monocotyledonous plants.

Correct Answer: C. Bryophyta

The correct answer is 'Bryophyta'. In bryophytes, the main plant body is a haploid gametophyte that supports the sporophyte. The sporophyte remains attached to the gametophyte for its entire life to obtain nutrition. This is a unique characteristic compared to higher vascular plants.