Lorica - body form protozoans, Biology

Assignment Help:

Lorica - body form Protozoans

It is a covering which unlike the theca fits loosely around the organism. It is a cup, bell or vase-like structure with one opening through which protrude the animal's appendages or the anterior part of the body. In solitary protozoans, the lorica may or may not possess a stalk. Cothumia which occur in couples, are contained in tectinous lorica and are stalked.

1616_Lorica - body form Protozoans.png

Figure: Cothurina

The protozoan nuclei are membrane bound, diverse in structure and method of division. Two basic types are found, vesicular with considerable\amount of nucleoplasm and the other compact. When more than one nucelus is present they are usually alike except in ciliates, where a massive compact macronucleus and one or more compact macronuclei are present. Cytoplasm can be distinguished as ectoplasm and endoplasm.

Ectoplasm appears transparent under light microscope and bears the base of the flagella or ciliia. The endoplasm appears granular and contains the nucleus and cytoplasmic organellps. The ectoplasm is more rigid and is in the gel state of a colloid while the endoplasm is in the sol or more fluid state.


Related Discussions:- Lorica - body form protozoans

Automated dna sequencing, Automated DNA sequencing is now common place whic...

Automated DNA sequencing is now common place which is based on the chain termination method but using a fluorescent dye attached to an oligonucleotide primer instead of using radio

Pulmonary function tests - diagnostic tests, Pulmonary  Function Test: ...

Pulmonary  Function Test: Pulmonary functions  tests (PFTs) provide information about a clients manifestation by measuring lung volumes, lung mechanics, and diffusion capabili

Write the meaning of gestational diabetes mellitus, Q. Write the meaning of...

Q. Write the meaning of Gestational Diabetes Mellitus? Gestational Diabetes Mellitus (GDM) is defined as glucose intolerance of any severity that has its onset or is first reco

Tumor suppressor genes, Tumor Suppressor Genes Tumor suppressor genes...

Tumor Suppressor Genes Tumor suppressor genes or anti-oncogenes generally inhibit cell division in cooperation with proto-oncogenes. The very existence of these genes prevent

Explain adverse effects of efavirenz, Adverse effects of Efavirenz The ...

Adverse effects of Efavirenz The most common adverse effects have been rash, dizziness, headache, insomnia and inability to concentrate. Vivid dreams, nightmares and hallucinat

What are the main bryophyte groups, Q. What are the main bryophyte groups? ...

Q. What are the main bryophyte groups? The major bryophyte groups are the mosses, the hornworts and the liverworts.

Defines the tenants of pangenesis theory, Defines the tenants of Pangenesis...

Defines the tenants of Pangenesis Theory Which of the following best defines the tenants of Pangenesis Theory? A. The hereditary material is composed in every organ/tissue a

What is a bio regenerative system, What is a bio regenerative system? Why i...

What is a bio regenerative system? Why is it essential? Nutritional requirements for long flights have been refined, placing more demands on food development. Despite the techn

Define solvent chemical potentials from phase equilibria, Define Solvent Ch...

Define Solvent Chemical Potentials from Phase Equilibria? Previously explained how we can evaluate the activity coefficient γ m,B of a nonelectrolyte solute of a binary soluti

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