protists – general...
TRANSCRIPT
Station 1
• Volvox
– View the picture of Volvox on the next slide
– Draw a picture of what you see.
– Why do you think Volvox is green? How do
you think Volvox gets its energy?
– Use the reading on Slide 3 to answer the rest
of the questions on your sheet.
Volvox Reading• Volvox are one-celled algae that live together in a
colony. The colony is a hollow ball with 500 to 20,000
individual cells. Look for rolling green balls on the slide.
When you see a volvox colony, look for the structures
shown in the diagram.
• Movement: Each volvox cell has two flagella. The
flagella beat together to roll the ball through the water.
• Feeding: Volvox cells have chlorophyll and make their
own food by photosynthesis.
• Reproduction: Daughter colonies are small, dark green
balls inside the volvox colony. When the daughter
colonies mature, the parent ball bursts open and
releases the daughter colonies.
• Size 350 to 500 µm (Two or three volvox cells would fit in
1 mm.)
Station 2
• Stentor
– Draw a picture of what you see on the next
slide.
– Label the mouth of the Stentor on your
picture.
– Cilia are short hair-like projections. What do
you think the Stentor uses its cilia for? (Hint:
Pay attention to where the cilia are located)
Station 3
• Amoeba
– What is a pseudopod? (pg. 606)
– What are the two purposes of a pseudopod?
(See Fig. 21-4 on pg. 606)
– Draw the amoeba you see on the next page
and label at least one pseudopod.
Station 4
• Spirostomum
– Draw what you see on the next slide
– Read the paragraph to answer the question
in your packet.
Spirostomum Reading
• Some of the largest ciliates belong to the
genus Spirostomum, some species large enough to see
with the naked eye. These organisms hold the record for
the fastest body contractions of any living cell,
contracting its length to 25% of its normal size in 6-8
milliseconds. Spirostomum feeds on bacteria and
during cold weather forms large clusters of organisms
that hibernate together.
• Taken from: https://www.microscopyu.com/gallery-
images/spirostomum-protozoan-videos
Station 5 pg 615-616
What is mutualistic symbiosis?
Give an example of a mutualistic relationship
between a protist and another organism.
What are 3 diseases that are caused by
protists?
1.
2.
3.
Station 6
• Ecological Roles of Protists
– On page 611 the ecological roles of protists
are described. List and describe the 4
ecological roles of protists. At least one
sentence about each role!
Station 7
• Read about Toxic Blooms on pg. DOL 13
– What type of protists cause toxic blooms or
red tide?
– How are red tides harmful to the food web?
– What effects can occur from eating shellfish
from red tide water?
Station 8
• Euglena- Draw the Euglena you see on the next slide and
record 3 specific observations about what you see.
- What are flagella? (pg 607). How do Euglena use
their flagella?
- Answer the rest of the questions in your packet.
Station 9
• Paramecium • Cilia are short hair-like projections (pg. 607). What
do Paramecium use their cilia for?
• Observe and draw the Paramecium on the next
slide.
• Make 3 specific observations.
• How do Paramecium move?