Botany Flashcards
In gymnosperms ,megasporangium(ovule) is borne on ?
Megasporophyll
Megasporophyll are arranged spirally on an axis to form the female Strobili/cone also known as ?
MegasporanGIATE
One cell of the nucellus of megasporangia(ovule) differentiates into ?
MMC (megaspore mother cell )
2n
Microspores develop into ?
Pollen grain
In gymnosperms the developed male gametophyte is highly reduced to ?
Limited number of cells.
What is the developed male gametophyte in gymnosperms ?
Pollen grain
In which is there NO FREE LIVING existence of male and female gametophytes ?
In gymnosperms and angiosperms
In gymnosperms the male and female gametophyte develop within ?
Micro and megasporangia respectively.
The female gametophyte bears how many archegonia ?
2-3 archegonia (female sex organ)
Male and female cones on SAME TREE?
Pinus
Male and female cones on different tree in ?
CYCAS
The pteridophytes selaginella and salvania are homo or hetersporous ?
HETEROSPOROUS
Example for diplontic life cycle ?
Fucus( alga)
Fucus shows what kind of life cycle ?
DIPLONTIC
Gingko is a ?
Gymnosperm!
Roots in Pinus have
Fungal association MYCORRHIZA
CYCAS has small specialized roots called ?
Coralloid roots
Coralloid roots are asscociated with what kind of bacteria ?
N2 fixing Cyanobacteria
Stems are branched in gymnosperms in ?
Pinus and Cedrus
Stems unbranched in gymnosperms in??
Cycas cycas cycasssssssss
Animal kingdom
EXTERNAL FERTILIZATION IN
Cteno,Echino,Hemi,Osti,amphi
FERTILIZATION NOT IN
Nemo called Anna
Conifers
Needle like leaves
Sunken stomata
