Question

Protists having non-contractile pusule are
A.Sporozoans
B.Ciliates
C.Dinoflagellates
D.Navicula

Answer 1

A protist is any eukaryotic living being (that is, a creature whose cells contain a cell core) that isn’t a plant or parasite. Protists share a typical precursor (the last eukaryotic regular ancestor). A few protists might be all the more firmly identified with creatures, plants, or parasites than they are to different protists; in any case, similar to green growth, spineless creatures, or protozoans.

Complete step by step answer: 1. A protist is any eukaryote that isn't a creature, (land) plant, or (valid) parasite; this definition avoids numerous unicellular gatherings, similar to the Microsporidia, numerous Chytridiomycetes (algae), and yeasts, and furthermore, a non-unicellular gathering remembered for Protista before, the Myxozoa (creature).
2. They have a trademark focal compartment called the nucleus, which houses their hereditary material.
3. They likewise have specific cell hardware considered organelles that execute characterized capacities inside the cell.
4. Photosynthetic protists, for example, the different kinds of green algae contain plastids.
5. Instances of protists include single adaptable cells (counting nucleariids and Foraminifera); choanoflagellates; ciliates; diatoms; dinoflagellates; Giardia; Plasmodium (which causes jungle fever); oomycetes (counting Phytophthora, the reason for the Great Famine of Ireland); and ooze molds.
The correct option is (C) Dinoflagellates. They possess a non-contractile vacuole called pusule and may take part in osmoregulation and floating.

Additional information:
Sporozoans- These are the parasitic non-motile protozoans. Example- Malaria parasite.
Ciliates- These are included in protozoans are include hair-like projections on the body. Example- Paramecium.
Navicula- It is a diatom alga and is recognized by boat-shaped appearance.

Note: Protists contain organisms that are not plants or animals. These are unicellular or multicellular organisms and most of the varieties contain a vacuole but some of them lack a true vacuole and in that case, a non-contractile, fluid-filled vacuole is formed called pusule.