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- 1. Multiple Choice
Which of these are a keystone species of a kelp forest?
The kelp
The sea otter
The sea urchin
All 3 are keystone species
- 2. Multiple Choice
Provides support and height to the leaf-like structures of the seaweed.
Blade
Holdfast
Pneumatocyst / bulb / gas bladder
Stipe
- 3. Multiple Choice
Attaches the seaweed to a rocky surface
Blade
Holdfast
Bulb / gas bladder
Stipe
- 4. Multiple Choice
Primary photosynthetic structure of the seaweed (where the photosynthesis takes place)
Blade
Holdfast
Bulb / Gas Bladder Pneumatocyst
Stipe
- 5. Multiple Choice
Allows the leaf-structures of the seaweed to float
Blade
Holdfast
Bulb / Gas Bladder / Pneumatocyst
Stipe
- 6. Multiple Choice
Which of the following factors do NOT limit the growth of kelp forests?
Salinity
Light
Space
Temperature
- 7. Multiple Choice
Which layer of the kelp forests consists of blades floating on the ocean's surface?
canopy
understory
algal turf
Sargasso Sea
- 8. Multiple Choice
Which group of algae contains the larges species of seaweed, including kelp and sargasso?
red algae
green algae
purple algae
brown algae
- 9. Multiple Choice
Which group of algae contains mostly freshwater species and is most similar to land plants?
red algae
green algae
purple algae
brown algae
- 10. Multiple Choice
Why must kelp live in deep, calm waters?
nutrients are more abundant in deep, calm waters than in warm, turbid waters
the photosynthetic pigments of kelp are more efficient in the depths than in the shallows
rocky terrain, the preferred substrate of kelp, is only found in deep, calm waters
the holdfasts are less likely to be ripped off the rocks in calm waters than in turbid waters
- 11. Multiple Choice
How might Kelp counteract the activity of grazers like sea urchins?
Float on the surface of the water with their holdfasts suspended in the water column
Produce bad-tasting or toxic chemical to deter the sea urchin from eating it
Produce blades that are several meters in length to maximize its photosynthetic capabilites
Attach their holdfasts into sandy sediment to hide them from the grazers
- 12. Multiple Choice
What is B pointing to?
Blade
Holdfast
Pneumatocyst / Gas Bladder / Bulb
Stipe
- 13. Multiple Choice
What is C pointing to?
Blade
Holdfast
Gas Bladder / Bulb / Pneumatocyst
Stipe
- 14. Multiple Choice
What is D pointing to?
Blade
Holdfast
Bulb / Gas Bladder / Pneumatocyst
Stipe
- 15. Multiple Choice
What is E pointing to?
Blade
Holdfast
Bulb / Gas Bladder / Pneumatocyst
Stipe
- 16. Multiple Choice
Some species of kelp are used in ice cream.
True
False
- 17. Multiple Choice
How much can giant kelp grown in a day in good conditions?
Close to a foot (30 cm)
half a foot (15 cm)
an inch / 2.5 cm
a meter (3 feet 3 inches)
- 18. Multiple Choice
Sea otter fur is the densest fur of any animal
True
False
- 19. Multiple Choice
Sea otters often wrap themselves in kelp while sleeping
True
False
- 20. Multiple Choice
When otters are removed from an ecosystem..
The urchin population rises
The kelp population drops
The kelp gets eaten more quickly than it can regrow
All of the answers occur
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