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

How are human voices created, How are human voices created? Human voice...

How are human voices created? Human voice is formed with the help of muscles in the neck and the vocal cords. The tighter the vocal cords the higher the pitch of voice. This is

Define drug metabolism (poly-pharmacy), Define Drug metabolism (Poly-pharma...

Define Drug metabolism (Poly-pharmacy)? As older persons are sometimes prescribed number of medications, care is to be taken, as there is reduction in renal and hepatic clearan

Illustrate about the neuropsychological assessment, Illustrate about the ne...

Illustrate about the neuropsychological assessment A neuropsychological assessment is a clinical examination of both the working brain and dysfunctional brain. Neuropsychologic

Clinical feature & medical complications of anorexia nervosa, Define Clinic...

Define Clinical Features and Medical Complications of Anorexia Nervosa? Anorexia nervosa, as we have learnt above, is a disorder characterized by deliberate weight loss, induce

Can flying insects beat their wings with great speed, Q. Why, even though t...

Q. Why, even though they have an open circulatory system, can flying insects like flies beat their wings with great speed? In insects the circulatory system is open but this sy

How the arrangement of cells helps with tissue functioning, PROVIDE a speci...

PROVIDE a specific example for epithelial and connective tissues, how the arrangement of cells helps with tissue functioning?

Explain the disadvantages of fixation, Explain the Disadvantages of Fixatio...

Explain the Disadvantages of Fixation? Fixation has following disadvantages also. These are highlighted herewith: (i) It distorts the cell's appearance. (ii) Motility can

What are taenias, What are taenias? What are the diseases caused by them? ...

What are taenias? What are the diseases caused by them? Taenias, also called as tapeworms, are platyhelminth animals (flatworms). The major diseases caused by taenias are taeni

Aves, detail information about ave?

detail information about ave?

Qualitative estimation of protein-amino acid content in food, Define Qualit...

Define Qualitative Estimation of Protein/Amino Acid Content in Foods? The protein and amino acid content of foods helps to interpret nutritional differences among foods in term

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