Slide 1 of 13 ARE YOU SMARTER THAN A MICROBE? cle/dn17390-why-microbes-are- smarter-than-you- thought.html?DCMP=OTC- rss&nsref=online-news Copyright Pearson Prentice Hall

Slide 2 of 13 Navigation Water-borne Chlamydomonas algae - they swim towards light but only if it is at a wavelength they can use for photosynthesis. Copyright Pearson Prentice Hall

Slide 3 of 13 Memory Amoebas employ sophisticated strategies to look for food and might travel in a way that optimises their foraging. A recent study suggests that the cells have a rudimentary memory, being able to remember the last direction they had just turned in, Copyright Pearson Prentice Hall

Slide 4 of 13 Human sperm have this ability too…. Copyright Pearson Prentice Hall

Slide 5 of 13 Copyright Pearson Prentice Hall 20-1 The Kingdom Protista

Slide 6 of 13 Copyright Pearson Prentice Hall What Is a Protist? What are protists?

Slide 7 of The Kingdom Protista Copyright Pearson Prentice Hall Protists are eukaryotes that are not members of the Plant, Animal, or Fungi kingdoms. What Is a Protist?

Slide 8 of The Kingdom Protista Copyright Pearson Prentice Hall The kingdom Protista may include more than 200,000 species. Most, but not all, protists are unicellular. Extremely diverse group of organisms Many are motile What Is a Protist?

Slide 9 of The Kingdom Protista Copyright Pearson Prentice Hall Evolution of Protists The first eukaryotic organisms on Earth were protists. “Protista” is a greek word meaning first Evolution of Protists

Slide 10 of The Kingdom Protista Copyright Pearson Prentice Hall Classification of Protists One way protists can be classified is by how they obtain nutrition: Heterotrophs are called animal-like protists. Photosynthesizers are called plantlike protists. Decomposers and parasites are called funguslike protists. Classification of Protists

- or - Continue to: Click to Launch: Slide 11 of 13 Copyright Pearson Prentice Hall 20-1

Slide 12 of 13 Copyright Pearson Prentice Hall 20-1 A protist is any organism that is not a plant, an animal, a fungus, or a prokaryote. a.True b.False

Slide 13 of 13 Copyright Pearson Prentice Hall 20-1 Animal-like protists are a.autotrophs. b.heterotrophs. c.decomposers. d.producers.

Slide 14 of 13 Copyright Pearson Prentice Hall 20-1 Biologists have difficulties classifying protists because a.their DNA cannot be examined. b.evidence suggests that they evolved from so many different groups. c.structural similarities used for classification are difficult to detect. d.their ancestors may have evolved through symbiosis.