Answer:
Li, Na, K, Rb
Explanation:
Los números atómicos de la tabla periódica:
Li - 3
Na - 11
K - 19
Rb - 37
“Paramecia have many organelles characteristic of all eukaryotes, such as the energy-generating mitochondria. However, the organism also contains some unique organelles. Under an external covering called the pellicle is a layer of somewhat firm cytoplasm called the ectoplasm.”
