In terms of diversity and number of identified species, the plant kingdom is larger than the animal kingdom. They are wide group of organisms that includes wide range of species from tiny algae to towering trees. They play a crucial role in ecosystem, providing oxygen, serving as the base of food chain and contributing to various ecological processes.
The animal kingdom is also large and diverse consisting of vast ray of species ranging from microscopic organism to larger animals. However, when considering the number of species, plants outnumber animals.