STD 12 - 12. ecosystem — BIOLOGY STD 12 Science — Question

$R$ : It represents species of taxonomically different groups occurring in equal balance.

$(i)$ $RNA$ can directly code for the synthesis of proteins

$(ii)$ It is very common process to synthesis $DNA$ from $RNA$

$(iii)$ $RNA$ is used as genetic material only in human

$(iv)$ One polynucleotide chain is present in $RNA$