Biology
Placenta is the structure formed

by the union of foetal and uterine tissue
None of these
by fusion of germ layers
by foetus only

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Biology
Which statement describes decomposers?

All listed here
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
Decomposers are insignificant organisms in the ecosystem and can be absent in some ecosystems

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