Question

Which criteria are used for
classification of plants? Explain with
reasons.​

Answer 1

While all plants are made up of similar parts that are essential in maintaining their survival (i.e. having roots, stem, leaves, etc.), they often look different. These differences in characteristics are used to group plants into species, which provides a way of classifying and therefore organizing plants.

Answer 2

Criteria used for classification of plants are-

● Presence or absence of organs in different plant division (Thallophytic, ,bryophyte, pteridophytes, gymnosperms, angiosperms) is the first criterion for classification of plants.

● Presence or absence of several conducting tissues for conduction of water and food, bryophytes do not possess whereas pteridophyta, gymnosperms, angiosperms possess.

● Development of seed as pteridophytes do not have seed whereas gymnosperms and angiosperms have seeds.

● Seeds are developed without seed coat in gymnosperms (naked)and or with seed coat in angiosperms(covered).

● The number of Seed coats in monocot is one cotyledon and dicot have two.