Ch. 21

Question 1

Protists

Answer 1

Single-celled eukaryotes that are not members of the plant, fungi or animal Kingdoms

Question 2

Genetic evidence shows that Protist evolved from

Answer 2

Prokaryotes.

Question 3

Since Protist were the first eukaryotes

Answer 3

they have had longer to evolve with many differences.

Question 4

Amoeboid Movement-

Answer 4

Move by changing shape

Question 5

Pseudopods-

Answer 5

Temporary projection of cytoplasm that
causes the cytoplasm to flow forward
propelling the organism forward. Used
by the ameba.

Question 6

Cilia-

Answer 6

Short numerous structures supported by
microtubules that row like oars on a boat. Used by
ciliates.

Question 7

Flagella-

Answer 7

Long structures supported by microtubules that
spin like propellers or whip back and forth to
produce movement.

Question 8

Passive movement-

Answer 8

Depend on air or water currents or
other organism to move them around
when they are in spore form
(nonmotile).

Question 9

Conjugation-

Answer 9

Exchange of genetic information and then the
cell goes into mitosis. Ex. Paramecium

Question 10

Alternation of Generations-

Answer 10

Sexual Ex. Oomycota (water mold) 2 different life cycles and structures. Alternate between haploid and diploid stages.

Question 11

Water molds reproduce

Answer 11

asexually by producing sporangium that contain spores.

Question 12

Phytoplankton

Answer 12

are small, free-floating organism are found at the surface of the oceans and lakes carry out half of the photosynthesis on earth and are the primary food source for water life like wales.

Question 13

Protist algae provide

Answer 13

energy and calcium carbonate for coral reefs.

Question 14

Blooms of dinoflagellates cause

Answer 14

toxic red tides.

Question 15

Heterotrophic Protists-

Answer 15

Have to obtain food from other living organisms.

Question 16

How do Amoebas eat

Answer 16

capture and digest food through the use of pseudopods that form food vacuoles to temporarily store food until it is broken down by lysosomes.

Question 17

how do Ciliates like paramecium eat

Answer 17

use the cilia to sweep food into the food gullet that are then surrounded by food vacuoles and broken down by lysosomes.

Question 18

Slime molds are

Answer 18

individual amebo forms that form large structures that have many nuclei called plasmodium that absorb molecules for nutrients through their cell walls and membranes.

Question 19

Symbiotic Protists-

Answer 19

Two species live close together.

Question 20

Mutualistic-

Answer 20

Benefits both parties

Question 21

Trichonympha are

Answer 21

flagellated protist that lives in the intestine of termites and produces and enzyme that makes it possible for the termite to digest the cellulose in wood.

Question 22

Trypanosoma

Answer 22

are flagellated protist that causes African sleeping sickness.

Question 23

Plasmodium are

Answer 23

protist that requires two hosts to complete its life cycle. Causes malaria.