LIFE SCIENCE

Detailed explanation-1: -Plants absorb ammonium and nitrate during the assimilation process, after which they are converted into nitrogen-containing organic molecules, such as amino acids and DNA. Animals cannot absorb nitrates directly. They receive their nutrient supplies by consuming plants or plant-consuming animals.

Detailed explanation-2: -Animals get these amino acids by eating plants or animals that eat plants. This works because plants can make all twenty amino acids including the ten or so “essential” ones that most animals can’t.

Detailed explanation-3: -Ammonium is the primary source of inorganic nitrogen used for amino acid synthesis.

Detailed explanation-4: -Ammonium ions are the form of nitrogen used by plants and animals to make amino acids which are then built up into the structural proteins and enzymes that are the key components of all living organisms.