Chapter 28: Protists (Book Questions/Quiz) Flashcards
Select all that apply
Select all of the following that are impacts of protists on global ecology.
Multiple select question.
Protists are the oldest organisms on Earth.
Protists produce at least half of the oxygen in the Earth’s atmosphere.
Protists cause serious diseases, such as malaria.
Some types of protists are able to fix atmospheric nitrogen.
Algae are being used in biofuel production.
Protists produce at least half of the oxygen in the Earth’s atmosphere.
Protists cause serious diseases, such as malaria.
Algae are being used in biofuel production.
The term protist comes from a Greek word that reflects the observation that these organisms were Earth’s ________ eukaryotes.
Initial
Organisms within the Protista can be informally grouped based on:
Multiple choice question.
cell size
species color
activity pattern
ecological role
ecological role
Algae, protozoa, and fungus-like are informal labels that refer to the __________ roles filled by protists.
ecological
Protists can be informally classified as algae, protozoa, or fungus-like protists according to the ecological roles they fulfill in their environments, that is, according to:
Multiple choice question.
whether they are aquatic or terrestrial
the method they use to obtain organic compounds
their type of life cycle
the method they use to obtain organic compounds
Which of the following statements best characterizes the impact of protists on human health?
Multiple choice question.
Some protists are parasites that cause serious human disease.
While some protists are pathogenic, none cause human illness.
All protists are benign.
Some protists are parasites that cause serious human disease.
Protists are
Multiple choice question.
eukaryotes
neither eukaryotes nor prokaryotes
prokaryotes
eukaryotes
Most algae are protists that can produce organic compounds by means of _________
photosynthesis
Protists can be grouped into three types according to the ___________ roles they fulfill within their environments.
ecological
Like true fungi, fungus-like protists obtain nutrients from their _________ using threadlike filamentous extensions.
environment
When we informally group protists according to whether they are autotrophs or heterotrophs, and whether they produce or consume oxygen, we are referring to their:
Multiple choice question.
ecological role
habitat preference
method of locomotion
ecological role
Select all that apply
Which of the following are informal groups of protists classified according to habitat?
Multiple select question.
Amoebae
Fungus-like protists
Plankton
Flagellates
Periphyton
Plankton
Periphyton
What is plankton?
Multiple choice question.
Photosynthetic protists
Organisms that attach to underwater surfaces by mucilage
Swimming or floating protists, bacteria, viruses, and small animals
Protists that possess a flagellum for locomotion
Swimming or floating protists, bacteria, viruses, and small animals
Algae are _______ protists.
Multiple choice question.
osmotrophic
photoautotrophic
mixotrophic
heterotrophic
photoautotrophic
Select all that apply
Which of the following are common characteristics of phytoplankton?
Multiple select question.
Relatively large size
Ability to float
Single cells
Short filaments of cells
Heterotrophic
Colonies of cells held together with mucilage
Ability to float
Single cells
Short filaments of cells
Colonies of cells held together with mucilage
In one informal classification scheme, protists are grouped according to possession of morphological structures used for:
Multiple choice question.
attracting mates
locomotion
copulation
defense
locomotion
The fungus-like protists, like true fungi, are:
Multiple choice question.
autotrophs
heterotrophs
heterotrophs
Plankton, phytoplankton, and periphyton are informal groupings of protists classified according to:
Multiple choice question.
type of life cycle
phylogeny
motility
ecological role
habitat
habitat
Select all that apply
Which of the following are structures that protists utilize to swim?
Multiple select question.
Flukes
Flagella
Pili
Chelicerae
Cilia
Flagella
Cilia
It is necessary that ______ float near the surface of the water to absorb light for photosynthesis, so they tend to be microscopic in size.
Multiple choice question.
macrophages
phytoplankton
zooplankton
bacteriophages
phytoplankton
A group of protists uses flagella to navigate their aquatic environments.. These protists are known as ________
flagellates
In order to move from one place to another, ciliates use _____________ and amoebozoa use __________ , which are specialized structures associated with their type of motility.
cilia; pseudopodia
In eukaryotic cells, locomotor extensions called _______ are longer and present in lower numbers per cell than are cilia.
Flagella or flagellum
Newly discovered species and results from molecular genetic methods have resulted in:
Multiple choice question.
reinforcement of the single kingdom protist classification
a constantly changing classification of the protists
a constantly changing classification of the protists
Protists have evolved diverse ways for locomotion. For example swimming can occur by means of appendages called ________ and ___________
flagella, cilia
A(n) _____________ is a level of classification that includes one or more eukaryotic phyla (which may be in different kingdoms) that share distinctive morphological and ecological characteristics.
supergroup
______ are usually composed of one or a few cells and are small because their appendage motion is not powerful enough to keep larger bodies from sinking.
Multiple choice question.
Flagellates
Paramecia
Ciliates
Seaweeds
Flagellates
Which eukaryotic supergroup includes multicellular animals, fungi, and related protists?
Multiple choice question.
Rhizaria
Alveolata
Opisthokonta
Stramenopila
Excavata
Opisthokonta
Select all that apply
Protist classification continues to change because:
Multiple select question.
molecular genetic methods reveal previously unknown relationships
the old classification was based solely on opinion, not on morphological similarities and differences
new species are still being discovered
molecular genetic methods reveal previously unknown relationships
new species are still being discovered
The cellular process by which an organism obtains energy from a food particle by digesting the particle with enzymes inside a cytoplasmic vesicle is known as __________
phagocytosis
A ______ includes one or more eukaryotic phyla that share distinctive morphological and ecological characteristics.
Multiple choice question.
family
supergroup
class
genus
species
supergroup
In endosymbiosis, the endosymbiont lives ________ the body of the host.
within
Photosynthetic protists with primary or secondary plastids that may be unicellular, colonial, or multicellular and may or may not possess flagella are close relatives of _______ ______.
Multiple choice question.
early animals
true fungi
land plants
land plants
Land plants evolved directly from ______ ancestors.
green algal
