Science 7777777777777 Week 2- Day 2.pptx

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1. Identify the different types of protists.

2. Match the characteristics of protists to its definition through a game.

3. Recognize the importance of protists on Earth.

4. Let’s play. Click me!

5. are eukaryotic organisms that can be unicellular or multicellular. They are grouped into animal-like, plant-like, and fungus-like protists.

6. Plant-like protists, or algae, are diverse and widely distributed. ALGAE

7. They are from single-celled to colonial and multicellular forms. ALGAE

8. Algae are not considered plants since they do not have structures that protect their reproductive cells. ALGAE

9. They are not classified as animals either because they do not move using appendages. ALGAE

10. Nor are they considered fungi since they do not have chitin in their cell walls. ALGAE

11. They are unicellular photosynthetic organisms that can float on the surface of freshwater and saltwater. These organisms are responsible for 50% to 85% of the oxygen in the atmosphere.

12. Othe examples of plant-like protists are dinoflagellates, euglena, diatoms, and golden-brown algae, which are ecologically classified as primary producers in aquatic habitats.

13. Dinoflagellates are also plant-like protists. They are named such due to the presence of two flagella in each cell.

14. They are similar to Euglena but are mostly found in marine environments.

15. Under certain conditions, dinoflagellates can grow or bloom rapidly, turning water along coasts reddish- brown. This phenomenon is commonly called a red tide .

16. A large dinoflagellate population produces large amounts of neutrotoxins that harm marine oraganisms, as well as terrestrial organisms that feed on them

17. Quiz Time!

18. Question 1 Which of the following are examples of plant-like protists? A. Euglena B. Paramecium C. Diatoms D. Amoeba

19. Question 2 Which characteristics are shared by plant-like protists? A. Photosynthesis B. Heterotrophic feeding C. Chlorophyll presence D. Cell wall composition

20. Question 3 What are the roles of plant-like protists in ecosystems? A. Oxygen production B. Decomposers C. Food source for aquatic life D. Nitrogen fixation

21. Question 4 Which of the following are types of algae? A. Red algae B. Green algae C. Brown algae D. Yeast

22. Question 5 Which protists are primarily unicellular? A. Diatoms B. Green algae C. Red algae D. Slime molds

23. Answer - 1 Which of the following are examples of plant-like protists? A. Euglena B. Paramecium C. Diatoms D. Amoeba Correct Answers: A - Euglena, C - Diatoms

24. Answer - 2 Which characteristics are shared by plant-like protists? A. Photosynthesis B. Heterotrophic feeding C. Chlorophyll presence D. Cell wall composition Correct Answers: A - Photosynthesis, C - Chlorophyll presence, D - Cell wall composition

25. Answer - 3 What are the roles of plant-like protists in ecosystems? A. Oxygen production B. Decomposers C. Food source for aquatic life D. Nitrogen fixation Correct Answers: A - Oxygen production, C - Food source for aquatic life

26. Answer - 4 Which of the following are types of algae? A. Red algae B. Green algae C. Brown algae D. Yeast Correct Answers: A - Red algae, B - Green algae, C - Brown algae

27. Answer - 5 Which protists are primarily unicellular? A. Diatoms B. Green algae C. Red algae D. Slime molds Correct Answer: A - Diatoms

28. THANK YOU FOR LISTENING!

29. Identify the different types of protists.

30. Fill out the table to compare the characteristics of different types of protists

31. Recognize the importance of protists on Earth.

32. Say something about these plant-like protists.

33. If there are plant-like protists, do you think there are also animal-like?

34. ANIMAL- LIKE

35. Animal-like protists or protozoans are heterotrophic , which means they depend on other organisms for food. ANIMAL- LIKE

36. Protozoans include the sarcodines (Amoeba), ciliates (Paramecium), and zooflagellates (Trypanosoma). PROZOANS

37. AMOEBA Simplest known protozoans. Consists of a nucleus and all other cellular parts present in a eukaryotic cell.

38. AMOEBA It “crawls” using its pseudopodia or false feet, into which its cytoplasm flows. This is referred to as amoeboid movement , powered by a protein called actin .

39. AMOEBA It also eats tiny food particles present in its surroundings using its pseudopodia. The food particles are enclosed by a food vacuole and are intracellularly digested through the help of enzymes from lysosomes.

40. PARAMECIUM Shape & Movement: Paramecia are slipper-shaped and move using tiny hair-like structures called cilia, which beat in rhythm to help them swim.

41. PARAMECIUM Feeding: The cilia also sweep food (like bacteria) into a special opening called the oral groove.

42. PARAMECIUM Special Features: They have two nuclei – a macronucleus for daily functions and a micronucleus for reproduction.

43. PARAMECIUM Importance: They help keep bacterial populations under control in freshwater ecosystems.

44. TRYPANOSOMA A unicellular parasite, also a protist, but unlike Paramecium, it lives inside the bodies of other organisms.

45. TRYPANOSOMA Shape & Movement: Long and thin, and moves using a whip-like tail called a flagellum.

46. TRYPANOSOMA Disease Connection: Some species, like Trypanosoma brucei, cause African sleeping sickness, spread by the bite of the tsetse fly.

47. TRYPANOSOMA Survival Trick: Trypanosomes can change their surface proteins to avoid being destroyed by the host’s immune system.

48. Feature Paramecium Amoeba Trypanosoma Shape Slipper-shaped No fixed shape (constantly changing) Long, thin, worm-like Movement Cilia (tiny hairs) Pseudopodia (false feet) Flagellum (whip-like tail) Feeding Oral groove (sweeps food with cilia) Phagocytosis (engulfs food with pseudopodia) Absorbs nutrients from host’s blood Lifestyle Free-living in freshwater Free-living or parasitic Parasitic (lives inside host) Effect on Humans Harmless Some species cause dysentery Causes African sleeping sickness

49. QUIZ TIME!

50. Question 1 Which of the following is known for its pseudopodia? A. Amoeba B. Paramecium C. Trypanosoma

51. Question 2 What structure do Paramecium use for movement? A. Cilia B. Flagella C. Pseudopodia

52. Question 3 Which organism is responsible for African sleeping sickness? A. Amoeba B. Trypanosoma C. Paramecium

53. Question 4 Which of the following organisms reproduces mainly by binary fission? A. Amoeba B. Paramecium C. All of the above

54. Question 5 What method does Trypanosoma use to move? A. Cilia B. Flagella C. Pseudopodia

55. Answer - 1 Which of the following is known for its pseudopodia? A. Amoeba B. Paramecium C. Trypanosoma Correct Answer: A - Amoeba

56. Answer - 2 What structure do Paramecium use for movement? A. Cilia B. Flagella C. Pseudopodia Correct Answer: A - Cilia

57. Answer - 3 Which organism is responsible for African sleeping sickness? A. Amoeba B. Trypanosoma C. Paramecium Correct Answer: B - Trypanosoma

58. Answer - 4 Which of the following organisms reproduces mainly by binary fission? A. Amoeba B. Paramecium C. All of the above Correct Answers: A - Amoeba, B - Paramecium

59. Answer - 5 What method does Trypanosoma use to move? A. Cilia B. Flagella C. Pseudopodia Correct Answer: B - Flagella

60. Say something about these plant-like protists.

61. If there are plant-like protists, do you think there are also FUNGUS -like?

62. What do you think this organism is—plant, animal, or fungus?

63. Have you ever seen bread turn moldy or a log covered in slimy yellow patches?

64. Those slimy growths are similar to fungus-like protists. They play an important role in nature by breaking down dead material—like nature’s recyclers!

65. Fungus-like Protists What are

66. Fungus- like Protists that look like fungi but are not true fungi.

67. Fungus- like They are heterotrophs (cannot make their own food).

68. Fungus- like They are decomposers : they feed on decaying matter.

69. Fungus-like Protists Types of

70. SLIME MOLDS Live in moist, shady places. Can move like amoebas when food is scarce. Example: Physarum

71. WATER MOLDS (OOMYCETES) Live in water or damp places. Some are plant parasites (cause diseases in crops like potatoes).

72. WATER MOLDS (OOMYCETES) Example: Phytophthora infestans (caused the Irish Potato Famine).

73. CHARACTERISTICS Like fungi: absorb nutrients from environment.

74. CHARACTERISTICS Unlike fungi: their cell walls contain cellulose (not chitin).

75. CHARACTERISTICS Often live in damp soil, rotting material, or water.

76. Summary

77. Fungus-like protists are not true fungi, but they act as decomposers. Slime molds move and feed like amoebas.

78. Water molds live in moist environments and can cause plant diseases. They are important in ecosystems because they recycle nutrients from dead organisms.

79. QUIZ TIME!

80. Question 1 Which of the following is a characteristic of slime molds? A. They are unicellular B. They can move like amoebas C. They reproduce by spores

81. Question 2 Which organism is classified as a water mold? A. Chytridiomycetes B. Saprolegnia C. Myxomycetes

82. Question 3 What do slime molds primarily feed on? A. Decaying organic matter B. Living plants C. Bacteria

83. Question 4 Which of the following groups are considered fungus-like protists? (Select all that apply) A. Slime molds B. Water molds C. Green algae

84. Question 5 What is the primary mode of reproduction in water molds? A. Budding B. Binary fission C. Spores

85. Answer - 1 Which of the following is a characteristic of slime molds? A. They are unicellular B. They can move like amoebas C. They reproduce by spores Correct Answer: B - They can move like amoebas

86. Answer - 2 Which organism is classified as a water mold? A. Chytridiomycetes B. Saprolegnia C. Myxomycetes Correct Answer: B - Saprolegnia

87. Answer - 3 What do slime molds primarily feed on? A. Decaying organic matter B. Living plants C. Bacteria Correct Answer: A - Decaying organic matter

88. Answer - 4 Which of the following groups are considered fungus-like protists? (Select all that apply) A. Slime molds B. Water molds C. Green algae Correct Answers: A - Slime molds, B - Water molds

89. Answer - 5 What is the primary mode of reproduction in water molds? A. Budding B. Binary fission C. Spores Correct Answer: C - Spores

90. THANK YOU FOR LISTENING

91. THANK YOU FOR LISTENING