Cell Membrane
The amoeba uses its cell membrane to form an arm-like structure (pseudopodia) to encircle food with its "arms" and engulfs it. Check the videos on YouTube!
cilia
The psuedopod is used to help the amoeba move, and also to eat. It is a part of the amoeba's body that it can stretch out and pull itself with.
beak
Amoeba obtains its nutrition in a heterotrophic mode. Both the anabolic and catabolic functions are carried out in the same cell. Amoeba feeds on plankton and diatoms present in water. It can form arm- like structures called pseudopodia, extending from any part of its body as it is shapeless. When it senses food in its surroundings it extends its pseudopodia in that direction and moves towards it. then it engulfs the food with its pseudopodia. When the food enters its body the amoeba forms a food vacuole around it which contains certain enzymes to digest the food. When the food is digested the unwanted waste is released through its body surface.
Why is the amoeba considered an outgroup in this cladogram?
Their tentacles.
mouth
Beak
mouth
mouth
they use its beak to get food
They use their tentacles