The term $...........$ means 'first animals'.

The posterior end of $Amoeba$ is characterized by:

Marine protozoans lack a contractile vacuole because:

The presence of cilia, an oral groove, and food vacuoles, and the absence of chloroplasts in a unicellular organism indicate that the organism carries on

Which of the following is false regarding nutrition in $Amoeba$?

Which organism is considered a connecting link between plants and animals?