Question

explain about plant kingdom ​

Answer 1

Answer:

According to Eichler classification, plant kingdom is divided into two major division based on flowering

1. cryptogame

cryptogame2 . phanerogam

cryptogames are non flowering plants which don't produce seeds while phanerogams are flowering plants

cryptogames are again subdivided into three

1.thallophyta

1.thallophyta2. bryophyta

1.thallophyta2. bryophyta 3. pteridophyta

Thallophyta : gametophytic plants ,it is subdivided into three classes algae ,fungi,lichen

algae are autotrophic gametophytes while fungi are heterotrophs .

lichens are symbiotic association of algae and fungi.

bryophyta:are also known as amphibians of plant kingdom. they are also gametophytic . bryophyta are divided into three hepatica ( liver worts), anthocerotae( hornworts), musci( mosses)

pteridophyta: they are sporophytic ,and plant body is differentiate into root stem and leaf. they are also known as vascular cryptogams. pteridophyta is divided into 4. they are psilopsida,lycopsida, sphenopsida pteropsida.

. phanerogams are flower bearing plants. they are divided into two

1. gymnospermae

2.angiospermae

gymnospermae are naked seeded plants .they are divide into 3 cyacadopsida, Coniferopsida,gentopsida

Angiosperm are plants with enclosed seed .they are divided into two monocotyledon and dicotyledon based on the number of cotyledons.