Question

Whar are phaneograms .write its two parts with defination and example

Answer 1

plant with well differentiated reproductive tissue that ultimately make seeds are called phanerogams.phanerogam is divided into two parts-1.gymnosperm: the plant of these group bear naked seeds.eg:-pines and deodar

2.angiosperm:these are flowering plants.eg:-pea, mango etc.
angiosperms is divided into two group-
1.monocotyledon
2.dicotyledon

Answer 2

HERE IS UR ANS...

1] phanergams or phenogamae ARE THE SEED AND FLOWER BEARING PLANTS..

2]THEY CONTAIN EMBRYO ALONG WITH STORED FOOD WHICH HELPS IN THE TIME OF GERMINATION

3]THE PLANT BODY IS DIFFERENTIATED INTO - ROTS, STEMS AND LEAVES

4] THE VASCULAR BUNDLE/SYSTEM ARE WELL DEVELOPED

5]HAS MULTICELULAR REPRODUCTIVE ORGANS AND THE EMBRYO DEVELOPS FROM FERTILISED EGG


------------on the basis of presence of fruits and naked of covered ovules, the group of seed bearing plants is further divided into - Gymnosperms and Angiosperm


~~~~~~~~~~~GYMNOSPERMS~~~~~~~~~~~~~


1) THEY ARE MOST PRIMITIVE PLANTS

2) THE SEEDS PRODUCED BY THESE PLANTS ARE NAKED AND ARE NOT ENCLOSED WITHIN THE FRUITS

3) USUALLY THEY ARE PERENNIAL, EVERGREEN AND WOODY PLANTS

4] SPOROHYLLS (REPRODUCTIVE ORGANS) ARE AGGREGATED TO FORM CONES [THERE ARE SEPERATE MALE AND FEMALE CONES]

5] XYLEM LACKS VESSELS AND PHLOEM LACKS COMPANION CELLS

`````````FOR EX. - PINUS (pines) , CYCAS , CEDRUS (deodar) AND GINKGO



~~~~~~~~~~ANGIOSPERMS~~~~~~~~~~~~~~~~

1] THEY ARE HIGHLY EVOLVED PLANTS

2] THEY PRODUCE SEEDS WHICH ARE ENCLOSED IN A FRUIT

3] THE SPOROPHYLLS ARE AGGREGATED IN A FLOWER

4] EMBRYO IN THE SEEDS OF THESE PLANTS HAVE STRUCTURES CALLES "COTYLEDONS" OR "SEED LEAVES"

5]VASCULAR TISSUE - XYLEM CONTAINS VESSELS AND PHLOEM CONTAINS COMPANION CELLS

6]THE OVULES ARE ENCLOSED WITHIN AN OVARY



******************on the basis of number of cotyledons (fleshy embryonic leaves) the angiosperms are further divided into - monocotyledons and di-cotyledons*************************************


#####1} MONOCOTYLEDONS [MONOCOTS] ############


------SEEDS OF THESE PLANTS HAVE ONLY ONE COTYLEDON

-------THEIR LEAVES HAVE PARALLEL VENATION

-------THEIR ROOT SYSTEM CONSISTS OF SIMILAR FIBROUS ROOTS

--------THE FLOWERS ARE TRIMEROUS [i.e they have three or multiple of three petals]

-----------VASCULAR BUNDLES ARE SCATTERED AND CLOSED (ALSO LACKS cambium)

---------````EXAMPLES--MAIZE , WHEAT, RICE, ONION, SUGARCANE, BARLEY,BANANA, COCONUT , BAMBOO GRASSES etc.



##### 2} DICOTYLEDONS {DICOTS] ##################


----------THE SEEDS PRODUCED BY THESE PLANTS HAVE 2 COTYLEDONS

-----------THEIR LEAVES HAVE RETICULATE VENATION WITH NETWORK OF VEINS

------------THE ROOT SYSTEM CONSISTS OF PROMINENT TAP ROOT

-------------THE FLOWERS HAVE FIVE OR MULTIPLE OF FIVE PETALS

--------------VASCULAR BUNDLES ARE ARANGED IN A RING AND ARE OPEN (i.e have cambium)

````````````EXAMPLES - PEA, MANGO, POTATO, SUNFLOWER, ROSE, BANYAN MARGOSA OR NEEM , APPLE , MUSTURD , MANGO ETC..



HOPE HELPED... :)

HOPE HELPED... :)