Lab 3 (Protists - 2 of 2)

Question 1

protozoans

Answer 1

eukaryotes with an animal-like, heterotrophic ecology

food vacuoles to enclose food particles for digestion and contractile vacuoles to expel excess water

Question 2

Phylum Rhizopoda

Answer 2

Amoebas - occur in marine, freshwater, and terrestrial environments
presence of pseudopods (moveable extensions of cytoplasm for locomotion and gathering food)
most reproduce asexually

Question 3

Amoeba

Answer 3

phagocytic - engulf food particles, form food vacuole, secrete enzyme for intracellular digestion
Contractile vacuole maintains water balance
Some form a test - protective case of sand grains; secreted or partially secreted covering

Question 4

Phylum Kinetoplastea

Answer 4

flagellates - have at least one flagellum

can be parasitic or free-living heterotrophs

Question 5

Trypanosoma

Answer 5

pathogenic and cause African sleeping sickness and Chagas’s disease
(phylum Kinetoplastea)

Question 6

Phylum Ciliophora

Answer 6

ciliates - large numbers of cilia; many also have both micronuclei and macronuclei (macronuclei develop from micronuclei and control cellular function, and divide when ciliates reproduce asexually by mitosis)

Question 7

Paramecium

Answer 7

Phylum Ciliophora
free-living freshwater genus; undergoes fission or conjugation (individuals from two different strains align and exchange nuclear material)

Question 8

Phylum Apicomplexa

Answer 8

apicomplexans - nonmotile animal parasites

Question 9

Plasmodium

Answer 9

phylum Apicomplexa, causes malaria

Question 10

Phylum Dictyostelia

Answer 10

slime molds - phagocytotic nutrition and unique unicellular forms
Stream along damp forests in a mass of plasmodium where individual cells can’t be distinguished; multinucleate
Reproduces by syngamy with flagellated gametes

Question 11

Physarum

Answer 11

slime mold; may dry to a hard resistant structure called sclerotium in unfavorable conditions