Plant kingdom Class 11 One Shot - NCERT - Boards Botany

Plant Kingdom: Evolution, Classification, and Key Features

Historical Changes in Plant Classification Plant classification has undergone significant changes, especially with the introduction of the five-kingdom system by R.H. Whittaker. Initially, organisms with cell walls, including fungi and some protists, were grouped with plants, but later distinctions were made...

Select the mismatched pair.

First terrestrial plants to posses vascular tissues – Gymnosperms

Which of the following groups will be described under Plantae ?

Algae, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms

Select the mismatched pair.

First terrestrial plants to posses vascular tissues – Gymnosperms

Which of the following groups will be described under Plantae ?

Algae, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms

What is a thalloid body?

A thalloid body is a simple, undifferentiated plant body that lacks true roots, true stems, or true leaves. This characteristic is typical of simpler plant forms, such as algae.

Explain the environmental and industrial importance of Algae.

Environmentally, algae fix approximately 50% of global carbon dioxide (CO₂) and increase dissolved oxygen in aquatic environments, serving as primary producers. Industrially, they yield hydrocolloids like Algin (from brown algae) and Carrageenan (from red algae) for water-holding, and Agar (from Gelidium and Gracilaria) for culture media and food.