The conoid is a special structure used by nonmotile parasites for penetrating host tissue. Which of the following possess a conoid:

Which of the following is a distinguishing feature of eukaryotic cells?

What is the main function of the endoplasmic reticulum (ER) in a eukaryotic cell?

Which of the following is not associated with the structure of Kelps?

Red algae is an important source of all of the following substances, except:

The cell wall of which of the following algae consists of two pieces that fit into each other, just like two parts of a petri dish?