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Protozoans
Prokaryotes represent only a few thousand of the estimated 2 million species of living beings known on the earth today. The rest are mostly eukaryotes that form the subject matter of the rest of this course. You have also learnt that living organisms are now classified into 5 kingdoms. Monera, Protista, Fungi, Plantae and Animalia. Of these, Protista are the primitive unicellular eukaryotes.
Figure: The Five-Kingdom System of Classification and its relationship to the plant / animal dichotomy.
Some of these have given rise to Fungi, others have give rise to Plantae, yet others have given rise to Animalia, all the three groups being multicellular. However, some of the Protista, though unicellular, still so much resemble Animalia that earlier, this group used to be designated Protozoa and was treated as a phylum under Kingdom Animalia of the two kingdom classification. Now we know that protozoans are really a heterogenous group of unicellular organisms add the term has no formal biological status. Even then, because of their similarity to animals and because most zoologists are interested In this group of organisms too.
CHOROI D - Thin, net like made up of connective tissue, rich in blood vessels. Pigment present, red in rabbit, brown or black in man. It reduces internal reflection.
What are the main cells of which poriferans are made? Sponges have their outer wall covered by flat cells known as pinacocytes and having pores well-delimited by special cells
What is reproduction?
When a wound occurs in humans, platelets in the blood activate a substance that starts clotting process. The substance which starts clotting is: a) Adenosine (pron: ah-den-ah-s
ALEURONE GRAINS - Also known as Plant lysosome , because they contain hydrolytic enzymes. Consists of Proteins. They are also known as Aleuroplast because they are ric
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why obwlia is considered to be of special interest in zoologyas an animal showing an intermediate grade of organisation
HlSTORY OF PSYCHIATRY: The earliest treatment of mental disorders was practiced by stone age cave dwellers. For certain mental disorders, the early Shaman or medicine man, t
Dosage and cost of micafungin The recommended dosage of micafungin is 50 mg/day for prophylaxis and 150 mg/day for treatment, both given IV as a single dose over 1 hour.
Meiosis is the special type of cell division in which the numbers of chromosomes in daughter cell are reduced to half, as compared to parent cell. Occurrence: It takes place
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