Bacteria
Sponges
The smallest known organism on Earth is a type of bacteria called Mycoplasma genitalium, which has a size of about 200-300 nanometers.
giraffe
worm of land/ earth worm
The simplest living thing is known as cynobacteria. This organism is also thought to be the first organism that thrived on earth billions of years ago.
protist that like chocolate
its extinct
The simplest type of learned behavior is called habituation. It involves an organism learning to ignore or become less responsive to a repeated, non-threatening stimulus over time.
Amoeba sponges
Volvox
No. Bacteria are.
spines