Botany Junior Inter Four Mark Important questions on Taxonomy
Botany Four Mark Important Questions on Taxonomy – Junior Intermediate BIE
Botany Important questions on Taxonomy have been characterized to help students to score more marks and get more flexibility to have complete knowledge on the subject. Students can go through these questions and answers as well to score complete marks on this segment as well.
Q: Describe the essential floral parts of plants belonging to Liliaceae.
A: Androecium and gynoecium are the essential floral parts. In Liliaceae the androecium and gynoecium show the following features:
- Androecium: six stamens in two whorls of three each, free or epiphyllous (attached to tepals), anthers are dithecous, basifixed, introrse and show longitudinal dehiscence.
- Gynoecium: Tricarpellary, syncarpous, ovary superior, trilocular with ovules on axile placentation. Style is terminal, stigma trifid or capitate.
Q: Write a brief account on the class of Dicotyledonae of Bentham and Hooker’s classification.
A: Bentham and Hooker divided flowering plants into three classes:
Dicotyledonae, Gymnospermae and Monocotyledonae
- Dicotyledonae: The class dicotyledonae is divided into three subclasses based on thenumber of perianth whorls and their union. They are: Polypetalae, Gamopetalae and, Monochlamydae.
The sub class polypetalae is divided into three series:
- Thalamiflorae with 6 cohorts (orders)
- Disciflorae (with 4 cohorts)
- Calyciflorae (5 cohorts)
The subclass gamopetalae is divided into three series:
- Inferae (3 cohorts)
- Heteromerae (3 cohorts) and
- Bicarpellatae (4 cohorts)
The sub class monochlamydae is divided into 8 series (not divided into cohorts). Each cohort is further divided into natural orders (families). The dicotyledonae contains 165 natural orders.
Q: Give economic importance of plants belonging to Fabaceae.
A: Economic importance of Fabaceae: The plants are a good source of proteins (pulses).
Ex: Cajanus, Cicer
- Pods of beans are used as vegetables. Ex: Phaseolus
- Edible oil is obtained from soya bean and groundnut. Ex: Arachis
- Timber is produced by rose wood. Ex: Dalbergia
- Blue dye from Indigofera and yellow dye from Butea are obtained.
- Derris is used in medicine.
- Crotalaria, Phaseolus are used as fodder.
- Sesbania and Tephrosia are used as green manure.