23.5 - A Feeding Groove Characterizes Many Protists Classified in the Excavates

Question 1

Excavates

Answer 1

protist supergroup that originated early among eukaryotes

Question 2

feeding grove

Answer 2

allows single celled organisms to ingest small particles of food in their aquatic habitats

Question 3

how do food cells taken into protist cells?

Answer 3

by a type of endocytosis called phagocytosis

Question 4

phagocytosis step #1

Answer 4

vesicle of plasma membrane surrounds each food particle and pinches off within the cytosol

Question 5

phagocytosis steph #2

Answer 5

enzymes within these food vesicles break the food particles down to small molecules

Question 6

phagocytosis #3

Answer 6

small molecules can be used for energy once they are released into the cytosol

Question 7

what is phagocytosis the basis for?

Answer 7

phagocytosis is the basis for the evolutionary process known as endosymbiosis

Question 8

endosymbiosis

Answer 8

symbiotic association in which small species known as endosymbiont lives within the body of a larger host species

Question 9

Euglenoid flagellates

Answer 9

photosynthetic euglenoids

Question 10

Photosynthetic euglenoids

Answer 10

display noticeable particles of carbohydrate and light sensing systems that include redeye spots

Question 11

what do the redeye spots of photosynthetic euglenoids enable?

Answer 11

the redeye spots enable the cells to swim to favorable light environments

Question 12

what are the plastidless members of excavates ?

Answer 12

parasites

Question 13

parasites

Answer 13

organisms that live and reproduce within a living host organisms