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Kingdom Protista: Protozoans Video Lecture - Biology Class 11 - NEET

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FAQs on Kingdom Protista: Protozoans Video Lecture - Biology Class 11 - NEET

1. What is Kingdom Protista and why are protozoans included in this kingdom?
Ans. Kingdom Protista is a diverse group of eukaryotic microorganisms, which includes protozoans. Protozoans are unicellular organisms that possess animal-like characteristics, such as being heterotrophic and capable of locomotion. They are included in Kingdom Protista because they share common features with other protists, such as a nucleus and membrane-bound organelles, but do not fit in the other kingdoms such as Animalia or Plantae.
2. How do protozoans obtain their food?
Ans. Protozoans obtain their food through various methods depending on their classification. Some protozoans are engulfing feeders and capture their food by surrounding and engulfing it. Others are absorptive feeders and absorb nutrients directly through their cell membrane. Some protozoans are also photosynthetic and can produce their own food through photosynthesis.
3. Can protozoans cause diseases in humans?
Ans. Yes, some protozoans can cause diseases in humans. For example, the protozoan Plasmodium is responsible for causing malaria, a life-threatening disease transmitted through mosquito bites. Another example is the protozoan Trichomonas vaginalis, which causes the sexually transmitted infection trichomoniasis. However, it is important to note that not all protozoans are harmful and many play important ecological roles in their respective habitats.
4. How do protozoans reproduce?
Ans. Protozoans can reproduce both asexually and sexually. Asexual reproduction in protozoans can occur through binary fission, where the organism divides into two identical daughter cells. Some protozoans also reproduce through multiple fission, where one parent cell produces multiple offspring. Sexual reproduction in protozoans involves the exchange of genetic material between two individuals through processes such as conjugation or syngamy.
5. What are some examples of protozoans that belong to Kingdom Protista?
Ans. There are numerous examples of protozoans that belong to Kingdom Protista. Some commonly known examples include Amoeba, Paramecium, Euglena, Trypanosoma, and Plasmodium. Amoeba and Paramecium are examples of free-living protozoans found in freshwater environments, while Trypanosoma and Plasmodium are parasitic protozoans that cause diseases like African sleeping sickness and malaria, respectively. Euglena is an example of a photosynthetic protozoan that can produce its own food through photosynthesis.
268 videos|544 docs|326 tests

Timeline

00:00 Introduction
00:23 Protozoa
00:58 Structure of Protozoa
01:20 Features of Protozoa
01:39 Question 1
01:40 Nutrition type of Protozoa- Heterotrophic
02:17 Parasites
02:17 Question 2
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