Biology Chapter 21
How are protists related to other eukaryotes?
Today's protists and plants, fungi, and animals have an ancient common ancestor.
The organism in Figure 21-2 is an example of
a flagellate
In a mycorrhizal relationship, what benefit does the plant get from the fungus?
aid in the absorption of water and minerals
Which of the following analogies best describes the motion of a nonmotile protist?
A boat is moved forward by a current.
True or False? Ciliates use *flagella* for feeding and movement.
FALSE
True or False? Protists are a diverse group of mainly *multicellular* eukaryotes.
FALSE
What is the relationship between multicellular protists and plants, animals, and fungi?
Multicellular protists and plants, animals, and fungi likely all have a common ancestor.
Which of the following events might lead to an algal bloom?
Nitrogen-rich fertilizer washes off of feilds into the ocean.
What is one reason why the classification of protists in one kingdom is difficult?
Protists more closely resemble members of other eukaryotic kingdoms than they do other protists.
True or False? African sleeping sickness is caused by a *parasitic* protist.
TRUE
True or False? Blooms of dinoflagellates can cause *red tides*.
TRUE
True or False? Cilia and flagella are similar in that they are both made of *microtubules*.
TRUE
What would happen to termites if Trichonympha disappeared?
Termites would die because they cannot digest wood without Trichonympha.
What structure is missing in the fungal hyphae shown on the right side of Figure 21-5?
cross wall
The tangles mass that makes up the part of a fungus that is below the soil is the
mycelium
When the amoebas of slime molds join, they form structures with many nuclei called
plasmodia
Most protists are
single-celled
Ciliates get food by
sweeping food particles into their gullet.
Which structure of a paramecium holds a "reserve copy" of all the cell's genes?
the micronucleus
In amoebas, what structure stores food for a short period of time?
vacuole
