Theodor Schwann and Matthias Jakob Schleiden create the cell theory in 1830s
Answer:
The substance is called agar. it's a jelly like substance that sets hard.
It is called as conservation biology. Conservation biology
aims to protect species, their habitats and the ecosystem from extinction. It is
one field of ecology that focuses on the environmental problems caused by
humans. It aims to reverse and understand the cause of loss of biodiversity.
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