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

Determine the sexual arousal mechanism, How does the sexual arousal mechani...

How does the sexual arousal mechanism in women facilitate fecundation? During sexual arousal in women the vagina secretes substances to neutralize its acidity therefore allowin

Enzymology, Ethylene glycol is a poison that causes about fifty deaths a ye...

Ethylene glycol is a poison that causes about fifty deaths a year in the United States. Treating people who have drunk ethylene glycol with massive doses of ethanol can save their

What is the excitation threshold of a neuron, What is the excitation thresh...

What is the excitation threshold of a neuron? How does this threshold relate to the "all-or-nothing" rule of the neural transmission? The excitation threshold of a neuron is th

Is there chloroplasts in cyanobacteria, Q. Is there chloroplasts in cyanoba...

Q. Is there chloroplasts in cyanobacteria? In cyanobacteria there is no chloroplast and the chlorophyll layers are dispersed in cytosol.

Pattern genetics, Ask questiRed-green color blindness is an X-linked recess...

Ask questiRed-green color blindness is an X-linked recessive disorder. If Allison is heterozygous (a carrier), and her husband, Michael, is NOT colorblind. What is the chance that

Illustrate enzyme-substrate interaction, On what structural level of the en...

On what structural level of the enzyme (primary, secondary, tertiary or quaternary) does the enzyme-substrate interaction depend? The substrate binds to the enzyme in the activ

Define burette - nutritional biochemistry, Define Burette - Nutritional Bio...

Define Burette - Nutritional Biochemistry A burette is a vertical cylindrical piece of laboratory glassware with a volumetric graduation on its full length and a precision tap,

Protozoa, classification sketch of protozoa

classification sketch of protozoa

Controlling expression of a number of genes in e, he Lac Repressor protein,...

he Lac Repressor protein, which we will talk about a bit later in the course, is important for controlling expression of a number of genes in E. coli. There are about 10 copies of

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