12. In North Pacific kelp forests sea otters act as A) dominant species B) keyst
ID: 276498 • Letter: 1
Question
12. In North Pacific kelp forests sea otters act as A) dominant species B) keystone species C) invasive species D) ecosystem engineers 13,--96 of global water exists in polar ice caps and glaciers A) 1 B) 2 C) 5 D) 97 14. Animals feeding on nonliving organic matter like feces, fallen leaves 15. Which is incorrectly paired with its trophic level A) cyanobacterium- primary producer B) 16. Matter cannot be created nor destroyed A) 1 law of thermodynamics B) 2nd law of 17 A) herbivores B) carnivores C) omnivores D) detrivores grasshopper-primary consumer C) zooplankton-primary producer D) eagle-tertiary consumer thermodynamics C) law of conservation of mass D) Entropy %of of energy / bio-mass is passes from one trophic level to the next trophic level A)1 B) 10 C) 30 D)50Explanation / Answer
Ans.12.
The choice is: (B).
Sea otters acts as Keystone species because it helps in controlling sea urchin population which can do damage to the ecosystem of kelp forest.
Ans.13.
The choice is: (B).
Around 2% of water is present in polar ice caps and glaciers and 97.5% water is present in oceans.
Ans.14.
The choice is: (D).
Detritivores feed on faeces and dead plant and animal materials.
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