«HETEROSPORY» संबंधित इंग्रजी पुस्तके
खालील ग्रंथसूची निवडीमध्ये
heterospory चा वापर शोधा. इंग्रजी साहित्यामध्ये वापराचा संदर्भ देण्यासाठी
heterospory शी संबंधित पुस्तके आणि त्याचे थोडक्यात उतारे.
1
Paleobotany: The Biology and Evolution of Fossil Plants
LYCOPSID HETEROSPORY The lycopsids encompass a variety of reproductive
strategies ranging from homospory to heterospory, and in some cases evolved
reproductive structures that in many ways were functionally similar to seeds ...
Edith L. Taylor, Thomas N. Taylor, Michael Krings, 2009
Incipient heterospory is a phenomenon distinguished usually in fossil plants
where spores of different sizes were found within the same sporangium but size
of spores does not correspond to the sexes after their germination as in the case
of ...
S. P. Bhatnagar, Alok Moitra, 1996
3
Text Book Of Botany Diversity Of Microbes And Cryptogams
HETEROSPORY. Most of the pteridophytes produce only one kind of spores, i.e.,
they are homosporous. But some produce two kinds of spores, differing in size.
The smaller spores are called microspores and the larger ones megaspores.
I HETEROSPORY AND SEED HABIT The sporophytes reproduce asexually
producing spores in sporangia. When all the spores are alike i.e., almost of the
same size, the phenomenon is called homospory. However, in some
pteridophytes, ...
5
Botany For Degree Pteridophyta
The reduction in the number of megaspores has been achieved either through
reduction in number of spore mother cells, or by the disintegration of developing
spores. Importance of Heterospory The mo st important aspect of heterospory is ...
6
Conifer Reproductive Biology
Heterospory. All free-sporing land plants prior to the Middle Devonian were
dispersing a single bisexual spore (homospory) but by the Upper Devonian, a
few plants had developed large female spores (700–900 μm) and small male
spores ...
7
Diversity and Systematics of Seed Plants
Development. of. heterospory. An important advance towards the seed plant life
cycle came with the evolution of plants that produced two types of spores -
microspores and megaspores. All seed plants are thus heterosporous. The
contents of ...
Dr. Singh, Dr. Pande & Dr. Jain, 2009
8
Homoplasy: The Recurrence of Similarity in Evolution
Fortunately, as the pteridophytic “living fossils” case study demonstrates, other
lineages of putatively simplified pteridophytes have left a wider range of extant
descendants. i * THE RAMPANT PARALLELISM OF HETEROSPORY
Heterospory ...
Michael J. Sanderson, Larry Hufford, 1996
9
Cryptogams: Algae, Bryophyta and Pterldophyta
7.20 Discuss the significance of heterospory with reference to Selaginella.
Significance of heterospory with reference to Selaginella Selaginella is a
heterosporous pteridophyte. In reproduces by forming two kinds of spores the
microspores ...
10
Botany For Degree Gymnosperm (M.E.)
It is evident from these examples that with the development of heterospory there
is a significant shifting of the time of sex determination from the gametophyte to
the sporophyte. Palaeobotanical evidence of heterospory The origin of ...
P C Vashishta, A K Sinha, Anil Kumar, P.C.Vasishta
