Answer:
<em><u>Acropetal suc</u></em><em><u> </u></em><em><u>cession refers to the arrangement of flowers, where the older flowers are present at the base and younger flowers are present at the a</u></em><em><u> </u></em><em><u>pex. In the centripetal succession, the younger flowers are present at the centre and older flowers are present towards the </u></em>
<em><u>p</u></em><em><u> </u></em><em><u>eriphery.</u></em>
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Answer: D- Dicer
Explanation:
Dicer, also known as endoribonuclease Dicer or helicase with RNase motif, is an enzyme that in humans is encoded by the DICER1 gene. Being part of the RNase III family, Dicer cleaves double-stranded RNA (dsRNA) and pre-microRNA (pre-miRNA) into short double-stranded RNA fragments called small interfering RNA and microRNA, respectively. These fragments are approximately 20-25 base pairs long with a two-base overhang on the 5' ends. Dicer facilitates the activation of the RNA-induced silencing complex (RISC), which is essential for RNA interference. RISC has a catalytic component Argonaute, which is an endonuclease capable of degrading messenger RNA (mRNA).
