Biology: Unit 3: Kingdom Protista

Question 1

Pseudopod

Answer 1

A temporary, foot-like extension of a cell, used for locomotion or engulfing food.

Question 2

Nucleus

Answer 2

The region of a eukaryotic cell that contains the cell’s main DNA.

Question 3

Vacuole

Answer 3

A membrane-bounded “sac” within a cell.

Question 4

Ectoplasm

Answer 4

The thin, watery cytoplasm near the plasma membrane of some cells.

Question 5

Endoplasm

Answer 5

The dense cytoplasm found in the interior of many cells.

Question 6

Flagellate

Answer 6

A protozoan that propels itself with a flagellum.

Question 7

Pellicle

Answer 7

A firm, flexible coating outside the plasma membrane.

Question 8

Chloroplast

Answer 8

An organelle containing chlorophyll for photosynthesis.

Question 9

Chlorophyll

Answer 9

A pigment necessary for photosynthesis.

Question 10

Eyespot

Answer 10

A light-sensitive region in certain protozoa.

Question 11

Symbiosis

Answer 11

A close relationship between two or more species where at least one benefits.

Question 12

Mutualism

Answer 12

A relationship between two or more organisms of different species where all benefit from the association.

Question 13

Commensalism

Answer 13

A relationship between two organisms of different species where one benefits and the other is neither harmed nor benefited.

Question 14

Parasitism

Answer 14

A relationship between two organisms of different species where one benefits and the other is harmed.

Question 15

Cilia

Answer 15

Hair-like projections that extend from the plasma membrane and are used for locomotion.

Question 16

Spore

Answer 16

A reproductive cell with a hard, protective coating.

Question 17

Plankton

Answer 17

Tiny organisms that float in the water.

Question 18

Zooplankton

Answer 18

Tiny floating organisms that are either small animals or protozoa.

Question 19

Phytoplankton

Answer 19

Tiny floating photosynthetic organisms, primarily algae.

Question 20

Thallus

Answer 20

The body of a plant-like organism that is not divided into leaves, roots, or stems.

Question 21

Cellulose

Answer 21

A substance (made of sugars) that is common in the cell walls of many organisms.

Question 22

Holdfast

Answer 22

A special structure used by an organism to anchor itself.

Question 23

Sessile Colony

Answer 23

A colony that uses holdfasts to anchor itself to an object.