Question

Collect photographs0of5 plants each of thallophyta bryophyta and pteridophyta divisions and writ a description of each

Answer 1

THALLOPHYTA: -1. IN THIS GROUP, PLANTS DO NOT HAVE WELL -DIFFERENTIATED BODY DESIGN.

2. PLANTS IN THIS GROUP COMMONLY CALLED ALGAE.

3. THESE ARE MAINLY AQUATIC.

4. E. G: - SPYROGYRA, CLADOPHORA, ULOTHRIX.


BRYOPHTA: -1. THESE ARE CALLED AMPHIBIANS OF KINGDOM PLANTAE.

2. PLANT BODY IS COMMONLY DIFFERENTIATED TO FORM STEM AND LEAF LIKE STRUCTURES.

3. THEY DO NOT HAVE VASCULAR BUNDLE.

4. E. G: - MOSS (FUNARIA), MARCHANTIA.

PTERIDOPHYTA: -1. THE PLANT BODY IS DIFFERENTIATED INTO ROOT AND STEMS AND LEAVES.

2. THEY HAVE VASCULAR BUNDLE.

3. THEY DO NOT PRODUCE SEEDS.

4. E. G: - MARSILEA, FERMS, HORSETAILS.

CERYPTOGAM: -1. THE THALLOPHTA, BRYOPHYTA AND PTERIDOPHYTA HAVE NAKED EMBRYO THAT ARE CALLED SPORES.

2. THE REPRODUCTIVE ORGANS IN THESE PLANTS ARE INCONSPICUOUS, THEY ARE THEREFORE CALLED 'CRYPTO-GAMS', OR THOSE WITH HIDDEN REPRODUCTIVE ORGANS.

~PHANEROGAMS: -1. THESE ARE PLANTS WITH WELL - DIFFERENTIATED REPRODUCTIVE TISSUE, THAT ULTIMATELY MAKE SEEDS.

2. SEEDS ARE THE RESULT OF REPRODUCTIVE PROCESS.

3. THEY CONSIST OF EMBRYO ALONG WITH STORED FOOD WHICH SERVES FOR THE INITIAL GROWTH OF EMBRYO DURING GERMINATION.

-THIS GROUP IS CLASSIFIED INTO TWO GROUPS: -

1. GYMNOSPERMS: -1. THIS TERM IS MADE FROM TWO GREEK WORDS 'GYMNO' MEANS NAKED AND 'SPERMA' MEANS SEEDS.

2. THE PLANTS OF THIS GROUP BEAR NAKED EYES.

3. THEY ARE PERENNIAL, EVERGREEN AND WOODY.

4. E. G: - PINES AND DEODAR.

~ANGIOSPERMS: -1. THIS WORD IS MADE FROM TWO GREEK WORDS 'ANGIO' MEANS COVERED AND 'SPERMA' MEANS SEEDS

2. THE SEEDS DEVELOP INSIDE AN ORGAN WHICH IS MODIFIED TO BECOME A FRUIT.

3. PLANT EMBRYOS IN SEEDS HAVE STRUCTURES CALLED COTYLEDONS.