Bio 134. Ch. 19 Protists

Transcription

1 Bio 134 Ch. 19 Protists

2 Main Idea! Protists form a diverse group of organisms that are subdivided based on their method of obtaining nutrients

3 What do all protists have in common?! They are all eukaryotes

4 How are protists classified?! Based on how they obtain nutrients

5 What are protozoan?! Animal-like protists

6 How do protozoa obtain nutrients?! They are heterotrophs they ingest food

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8 How do plantlike protists obtain their nutrients?! They make their own food through photosynthesis

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10 How do the funguslike protists obtain their nutrients?! They absorb their nutrients from other organisms

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12 19.2 Protozoan Animal-like protists p

13 Main Idea! Protozoans are animal-like, heterotrophic protists

14 How do members of ciliophora move around?! They use cilia Cilia numerous short hairlike projections

15 Example of a Ciliate:

16 Stentor

17 Trichodina pediculus

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19 Paramecuim

20 Paramecia structures:! Pellicle a layer of membrane! Trichocysts cylindrical bodies that discharge a spinelike structure! Contractile vacuoles collect excess water from the cytoplasm and expel it from the cell

21 How do members of sarcodina move around?! With the use of a pseudopod Pseudopod a temporary extension of cytoplasm used to surround and envelop food

22 Amoeba

23 What other name do apicomplexa go by?! sporozoans

24 How do the sporozoans get their food?! They are parasitic Parasitic they get their nutritional requirements from a host

25 What disease can be caused by sporozoans?! malaria

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27 What other name do zoomastigina go by?! zooflagellates

28 How do zooflagellates move around?! Use a flagella Flagella long whiplike projections that protrude from the cell, used for movement

29 What two diseases can be caused by zooflagellates?! African sleeping sickness! American sleeping sickness

30 19.3 Algae Plantlike protists p

31 Main idea! Algae are plantlike, autotrophic protists that are the producers for aquatic ecosystems

32 What are the light absorbing pigments in algae?! chlorophyll

33 Where are the light absorbing pigments found?! In the chloroplasts

34 What is a diatom?! A unicellular algae that have walls made of silica

35 Diatoms

36 How do dinoflagellates move around?! They have two flagella that make them spin

37 Dinoflagellates

38 What is bioluminescence?! Bioluminescence (or bioluminescent) means they emit light

39 Bioluminescent Dinoflagellates

40 What is a algal bloom?! When dinoflagellates reproduce in great numbers

41 Algal bloom

42 What is a red tide?! A algal bloom of red pigmented dinoflagellates

43 Red Tide

44 How do euglena obtain food?! They are photosynthetic but can also be heterotrophic

45 Euglena

46 How do Chrysophytes obtain food?! They are all photosynthetic, but some can also be heterotrophic

47 What is a colony?! A group of cells that join together to form a close association

48 Colony of Golden-brown algae

49 Yellow-green algae

50 Where can you find brown algae?! Along rocky coasts in cool areas of the world

51 Brown Algae

52 How are green algae and plants similar?! Contain chlorophyll! Green! Have cell walls! Store food as carbohydrates

53 Spirogyra

54 Colony of Volvox

55 Why can red algae live in deeper water than other algae?! Their red color allows them to absorb green, violet,and blue light that can penetrate water to a deeper depth

56 Red Algae

57 What are some uses for algae?

58 What is Alteration of Generations?! A life cycle of algae that takes two generations to complete one that reproduces sexually and one that reproduces asexually.

59 Alteration of Generations

60 19.4 Funguslike Protists p

61 Main Idea! Funguslike protists obtain their nutrition by absorbinig nutrients from dead or decaying organisms

62 How are slime molds and fungus alike?! They reproduce through spores! They absorb nutrients from decaying organic material

63 How are slime molds and fungus different?! Fungi have chitin in cell walls! Slime molds have cellulose

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65 What is plasmodium?! A mobile mass of cytoplasm that contains many diploid nuclei but no separate cells

66 How are acelllar slime molds and cellular slime molds different?! Acellular slime molds form a plasmodium (many nuclei, but no separate cells)! Cellular slime molds are amoeba-like cells moving in a mass

67 What is acrasin?! When food is scarce, slime mold cells give off this chemical

68 What does acrasin do?! It signals the slime mold cells to all get together, form a fruiting body, and release spores

69 Where can you find water molds and downy mildew?! In water or damp places

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