Biology lab 2

Question 1

protists

Answer 1

a diverse group of unicellular, colonial, and multicellular eukaryotes.

Question 2

Supergroups

Answer 2

informal taxonomic categories that do not fit into the traditional Linnaean system

Question 3

All Supergroups are categorized within

Answer 3

Domain Eukarya

Question 4

refer to eukaryotes that are not animal, plants, or fungi

Answer 4

protists

Question 5

containing chloroplasts which they use to convert solar energy into chemical energy in the form of sugars

Answer 5

photoautotrophs

Question 6

protists that obtain nutrition by absorbing organic molecules or ingesting
food particles from the environment

Answer 6

Heterotrophic

Question 7

Protists that can photosynthesize AND ingest nutrients

from the environment are called

Answer 7

mixotrophs

Question 8

Some unicellular protists can only reproduce asexually while others can reproduce both asexually and sexually

Answer 8

true

Question 9

Sperm-producing gametangia

Answer 9

antheridia

Question 10

Some multicellular/filamentous algae have gamete producing structures
called

Answer 10

gametangia

Question 11

egg-producing gametangia

Answer 11

oogonia

Question 12

includes two groups of protists (red algae and green algae) as
well as land plants

Answer 12

Supergroup Archaeplastida

Question 13

are photoautotrophic and include unicellular, colonial, and multicellular species

Answer 13

Red algae and green algae

Question 14

Most are marine seaweeds, especially characteristic of warmer waters, although some inhabit freshwater and even terrestrial habitats

Answer 14

red algae

Question 15

species secrete a hard shell of calcium carbonate

onto the surface of their cells for increased structural support

Answer 15

coralline red algae

Question 16

Many, but not all species are reddish due to the presence of an accessory
photopigment (phycoerythrin) which masks the green of chlorophyll.

Answer 16

red algae

Question 17

Most species can be found in freshwater or marine aquatic habitats but some can also be found growing on terrestrial surfaces such as buildings, tree trunks, and sidewalks

Answer 17

green algae

Question 18

are characterized by the presence of chloroplasts which have much the same ultrastructure and chlorophyll composition as plants

Answer 18

Green algae

Question 19

does not yet have a formal name and is currently known as an acronym of the
first letters of the three large clades within this group

Answer 19

SAR clade

Question 20

are grouped on the basis of molecular evidence as well as the hypothesis that two of these groups, stramenopiles and alveolates, have some algal species that are derived from an ancestor that had a secondary endosymbiotic relationship with red algae

Answer 20

Protists in the SAR clade

Question 21

unicellular photoautotrophic stramenopiles abundant in both marine and
freshwater plankton

Answer 21

Diatoms

Question 22

exist in a variety of unique shapes but all share a translucent appearance because they are surrounded by a glass-like wall

Answer 22

diatoms

Question 23

Diatoms are encased with a unique glass-like cell wall made of silica which
consists of two overlapping parts this is called

Answer 23

a frustule