Multiple choice

In addition to the animal and plant kingdom, Haeckel (1886) proposed a third kingdom called _______.

  1. Fungi

  2. Algae

  3. Protista

  4. Monera

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ernst Haeckel proposed the three-kingdom system in 1866, adding Protista to the existing Animalia and Plantae kingdoms to include unicellular organisms.