Question

In five kingdom classification, which of the following is
not considered in kingdom Plantae?
Red algae
Blue green algae
Brown algae
Green algae​

Answer 1

Plant kingdom is divided into five major divisions:-

1. thallophyta
2. bryophyta
3. pteridophyta
4. gymosperms
5. angiosperms

● now thallophyta divisions is also called as algae which further include 3 classes:-

1. red algae
2. brown algae
3. green algae

so now acc to your ques all three belong to plantae except blue green algae which is a cyanobacteria belong to kingdom monera.

Answer 2

In five kingdom classification, Blue green algae was not considered in kingdom Plantae.

• R.H. Whittaker in 1969 proposed the five kindom classification of organisms.
• Monera, Protista, Fungi, Plantae, and Animalia are the five kingdoms of his classification.
• Plantae includes thallophyta (algae), bryophyta, pteridophyta, gymnosperms, and angiosperms.
• Algae further consists of three forms: green, brown, and red algae. Cyanobacteria are commonly known as blue green algae but they are not truly plants.