Questions

CHOICES (or) OPTIONS are what When you have three you have three, when you have two you have two, when you have one you have none. 

Animals and people who eat both animals and plants i.e, both producers and consumers are called omnivores.

San Marino

The genome of an organism is inscribed in DNA, or in some viruses RNA. The portion of the genome that codes for a protein or an RNA is referred to as a gene. Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid.

An ionic bond is a chemical bond between two atoms in which one atom seems to donate its electron to another atom.

Here in the given compounds, the compound that contains ionic bond is CaO, Calcium oxide.

Compounds are substances is true about them.