In protozoans like $Amoeba$ or $Paramecium$,the organelle responsible for osmoregulation is ....... .

Tonoplast is a

In plants,the tonoplast facilitates the transport of a number of ions and other materials:

Cell sap is a

Anthocyanins are pigments which are

Which of the following cell organelles is described by the given statements?
$(a)$ Contains small tubules.
$(b)$ Is bounded by a membrane.
$(c)$ Contains enzymes.
$(d)$ Found in both plants and animals.