What is the keystone species for the Pacific northwest?
A: kelp
B: sea urchin
C: fish
D: sea otter
A: kelp
B: sea urchin
C: fish
D: sea otter
举一反三
- Listen to the statement and circle the appropriate letter. What is the topic of this statement A: sea urchins B: sea otters C: the relationship of many sea living creatures in the kelp forest
- 中国大学MOOC: China is flanked by the Bohai sea, the Yellow sea, the ____ and South China Seas with the Pacific to the east.
- Fish ______ from prehistoric sea creature.
- China is flanked by the Bohai sea, the Yellow sea, the ____ and South China Seas with the Pacific to the east. A: West B: East C: North D: Black
- What does the abbreviation MSL stand for on a nautical chart A: Mean sea light. B: Mean sea level. C: Moment sea level. D: Moment sea light.