Describe palynological evidence, Biology

Assignment Help:

Q. Describe Palynological Evidence?

Palynology is the study of pollen and spores. The taxonomic characters of pollen grains include wall structure, polarity, symmetry, shape and grain size. In angiosperms pollen grains are of two kinds viz. Monocolpate and tricolpate. Monocotpate pollen grains are boat shaped, have one long germinal furrow and one germinal aperture. This is characteristic of primitive dicotyledons and majority of monowtyledons. According to some palynologists the first flowering plants had monocolpate pollen grains. Tricolpate grains are globose, symmetrical, have three germinal apertures and are characteristic of advanced dicotyledons.

1529_Describe Palynological Evidence.png


Related Discussions:- Describe palynological evidence

Nemerteans - regeneration in invertebrates, Nemerteans - Regeneration in In...

Nemerteans - Regeneration in Invertebrates Nemerteans as well possess remarkable regenerative ability, as even a small fragment can regenerate into a complete worm. Nemerteans

Cells, what are golgi apparatus

what are golgi apparatus

Asexual reproduction in animals, Asexual Reproduction in Animals Repro...

Asexual Reproduction in Animals Reproduction may be referred as production of true copies. Most of the animals that are quite familiar to us generate male and female gametes (

What is ascending aortic aneurysm, What is Ascending Aortic Aneurysm ? ...

What is Ascending Aortic Aneurysm ? Ascending Aortic Aneurysm :  In aneurysms confined to ascending aorta well below the innominate artery origin, the technique used is

What is tree girdling, What is tree girdling? What happens to a plant when ...

What is tree girdling? What happens to a plant when that girdle is removed from the stem (below the branches)? Malpighi's girdling, or tree girdling, is the removal from a ste

Define briefly about the conjugated proteins, Define briefly about the Conj...

Define briefly about the Conjugated Proteins? Conjugated proteins are made up of simple proteins combined with a non- proteinous substance. The non-proteinous substance is know

Give some human diseases caused by protozoans, Q. What are other important ...

Q. What are other important human diseases caused by protozoans? Some other significant protozoan infections are amebiasis, trichomoniasis, giardiasis, leishmaniasis, meningoen

What is the importance of vitamin B2, What is the Importance of vitamin b2 ...

What is the Importance of vitamin b2 As a prosthetic group of the flavin enzymes, vitamin B 2 is involved in the reactions of almost all nutrients of plants and animals. They

Define the sun and solar drying method, Define the Sun and Solar Drying Met...

Define the Sun and Solar Drying Method? The make use of solar energy to preserve the food items is mainly the oldest form of food reservation and is still practiced today for f

Blastocyst, Blastocyst is the developmental stage of fertilized ovum by th...

Blastocyst is the developmental stage of fertilized ovum by the time it is prepared to implant; formed from morula and comprises of an internal cavity, an inner cell mass, and an

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd