Biology
Pellagra and Scurvy are caused by which pair of vitamin deficiency respectively ________

VitaminC and VitaminD
VitaminC and VitaminA
Vitamin A and VitaminB-12
VitaminB-12 and VitaminC

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Biology
Which statement describes decomposers?

Decomposers are insignificant organisms in the ecosystem and can be absent in some ecosystems
Decomposers can produce their own source of energy and can sometimes act as primary producers
Decomposers are those organisms that recycle matter in the ecosystem
All listed here

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