Question

50 marks questions , write the whole description about protista ?

Answer 1

Answers :-

✨ organisms are unicellular having eukaryotic condition that is nucleus. all the various cell organelles are parents the members are ist group of eukaryotic unicellular organisms.

❄ General character of. this kingdom ❄

✨outer covering is consisted of plasma membrane.no any complex structure in body .the protozoans or the organisms in which a cell perform the functions of whole body so, in other words we can say that absent cellular organisms.

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❄ Mode of nutrition in the kingdom protista ❄

✨ Holozoic nutrition = animal like nutrition

✨Holophytic nutrition = plant like nutrition

✨saprozoic nutrition = Takes nutrients from dead and decomposed organic matter .

✨ parasitic nutrition = Takes nutrition from host

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✴ unicellular protista are kept in phylum protozoa of the kingdom animalia .

✨ Leeuwenhoek (1676) seen the protozoa at ist time .goldfus(1818) coined organizations , very small and commonly called animalcule

✨The body surface /plasma membrane perform the functions of respiration
I.e. exchange of respiratory gases

✨Intra cellular digestion occurs in the food vacuole

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✴ In take of food material done by protista ✴

✨ pinocytosis = style of drinking by a protozoa
✨ phagocytosis = style of eating by a protozoa

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✨ Reproduction is complete by asexual and sexual method .both fresh water and marine waters form are parent .

✴main basis of classification of protozoa is the style of locomotion ✴

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Answer 2

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Protista.↩️☺️☺️
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⭐️All single celled eukaryotes are placed under protista.but the boundaries of this kingdom is not well defined . What
may be a photosynthetic protistan to one biologist may be a plant to another .
➡️Crysophytes

➡️ Dinoflagellates

➡️Euglenoids

➡️Slime moulds

➡️ Protozoans

⭐️These are under the Protista .Members of Protista are primarily aquatic..It forms a link with the other dealing with plants; animals and fungi .Being Eukaryotes The protistan cell body contains a well defined nucleus and other membrane -bound organelles.

⭐️Some.have flagella or cilia .Protists reproduce asexually and sexually by a process involved cell fusion or zygote formation.

➡️PROTISTS STRUCTURE
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⭐️They are microscopic organisms.Cell structure is eukaryotic .It is surrounded by plasmalemma (cell membrane).There may an outer covering of pellicle ;cuticle ; shell or cellulosic wall.
Cilia and Flagella occur in number of forms .They have typical 9+2 fibrils .

Locomotion In Protists
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⭐️There are five modes of locomotion in Protista.:-

➡️Pseudopodial Locomotion

➡️Flagellar Locomotion

➡️Ciliary Locomotion

➡️ Wriggling Locomotion

➡️ Location of Mucilage propulsion

Nutrition in Protista
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⭐️⭐️There nutrition may be of any kind such as it can be PHOTOSYNTHETIC.(In which organisms prepare their food from CO2 and water.

➡️HOLOZOIC Nutrition
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⭐️In this the individual capture and ingest the food like animals.

➡️SAPROPHYTIC Nutrition

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⭐️In this the organisms releases Enzymes into the surrounding where the enzymes convert organic matter into simple matter.

➡️RESPIRATION In Protists
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⭐️Most of them perform aerobic RESPIRATION. But parasitic Protists living at the bottom.of the habitat respire anaerobically.

Hope it helps u
@arsheen

ße ßrainly....↩️♥️☺️☺️