'Rio + 20' is the short name for

Write a short note on RBC.

Name the enzyme that joins the short pieces in the "lagging strand" of DNA during replication.

name the infloescence in which the peduncle is extremely short and bears flowers of equal pedicel length

Name two economically importatnt spongs. Give their classification . Write a short note on any one of these.

What is the scientific name of (a) short-sightedness, and (b) long-sightedness ?