Protist (Ch.24)

Question 1

what are some characteristics of protist?

Answer 1

• heterogenous
• microscopic
• most are unicellular (some are multicellular and large)
• most are aquatic
• membrane bound nucleus
• multiple linear chromosomes
• some have mitochondria and chloroplast
• have microtubules and microfilaments that help provide motility and cytoskeletal support
• share characteristics of transcription and translation with other eukaryotes

Question 2

Protist

Answer 2

eukaryotic organism that. is not an animal, plant or fungus

Question 3

How does protist differ from fungi?

Answer 3

• most protist are motile (have motile stages)

- cell walls made up of cellulose NOT chitin

Question 4

How does photosynthesizing protist differ from plants?

Answer 4

• photoautotrophs can also be heterotrophs and some regularly combine both modes of nutrition
• DO NOT retain developing embryos inside of parental tissue
  DO NOT have highly differentiated structures equivalent to roots, stems and leaves
• sometimes referred to as algae

Question 5

How does protist differ from animals?

Answer 5

• protist lack features that characterize many animals

ie. nerve cells, highly differentiated structures - limbs, heart and collagen, an extracellular support chain