The group of crop plant that are vegetatively propagated is:

 

Enzymes in the body are those which play an important role of breaking down the larger molecules to small and speeds up the chemical reactions.

The digestion process starts in the mouth and the complete digestion process completes in the small intestine where all the nutrients in the food are absorbed.

A cell undergo meiosis, and it produces 4 haploid cells from a single diploid cell.

Hence, the given statement is true.

A RNA copy of a DNA gene is called as messenger RNA or mRNA. mRna is used in translation because information is translated from one language (nucleotides) into another (amino acids).

Hence, mRNA is used to transfer genetic information by a cell.

Neurons are the functional units of the nervous system in the body.

The proteins of the electron transport chain are present in mitochondrial inner membrane in Eukaryotes.