Why three p-orbitals of each of the two atoms cannot form more than one sigma bond ?

Answer the following in one word only. Triplet of three nucleotides that code for more than one amino acid?

Fill in the blanks : Complexes in which the metal atom is linked to more than one type of ligands are called…………

Read the following statements with one or two blanks in each one of them. (i) A genus containing more than one species is called ______ genus, e.g., _______ . (ii) _______ is a collection of dried, pressed and preserved plants mounted on _________ sheets, properly labelled, systematically arranged and available for reference study. (iii) Living fossils are ancient organisms persisting in modern times _______ gradual morphological changes. (iv) A ________ is compreshensive treatise of a taxonomic group, generally a genus or a family, providing all taxonomic data related to that group. Which of the following correctly fills any two of the above statements ?

Why is sigma bond stronger than pi bond ?

Translate "A year consists of twelve months while a month does not consist of more than thirty one days" propositions into symbolic form, stating the prime components