How do Cercozoans feed?

How do Cercozoans feed?

The Cercozoa are a group of protists, including most amoeboids and flagellates that feed by means of filose pseudopods. These may be restricted to part of the cell surface, but there is never a true cytostome or mouth as found in many other protozoa.

Do Cercozoans have plastids?

3 Group 3 (Cercozoa) They acquired photosynthesis by capturing a green alga, and they retain both the plastid of the green alga and a remnant of its nucleus (nucleomorph), essentially a cell within a cell (McFadden 2001; Hackett et al., Chapter 7, this volume).

Where do Cercozoa live?

Cercozoa are also abundant in marine benthic and interstitial communities; a recent HTS study using general eukaryotic primers found Cercozoa to comprise between 9 and 24% of all assigned eukaryotic operational taxonomic units (OTUs) on the ocean floor (Pawlowski et al., 2011).

What are Radiolarians made of?

The Radiolaria, also called Radiozoa, are protozoa of diameter 0.1–0.2 mm that produce intricate mineral skeletons, typically with a central capsule dividing the cell into the inner and outer portions of endoplasm and ectoplasm. The elaborate mineral skeleton is usually made of silica.

What protist has two flagella?

Dinoflagellates: The dinoflagellates exhibit great diversity in shape. Many are encased in cellulose armor and have two flagella that fit in grooves between the plates. Movement of these two perpendicular flagella causes a spinning motion.

Are Cercozoans unicellular or multicellular?

Transmission by Fungi and Protists. These soil-dwelling unicellular organisms, either chytrids (zoosporic Fungi or plasmidiophorid protists (Cercozoa) (Figs.

How do Radiolarians float?

Description. Radiolarians have many needle-like pseudopods supported by bundles of microtubules, which aid in the radiolarian’s buoyancy. The cell nucleus and most other organelles are in the endoplasm, while the ectoplasm is filled with frothy vacuoles and lipid droplets, keeping them buoyant.

How do protists reproduce?

Protists reproduce by a variety of mechanisms. Most undergo some form of asexual reproduction, such as binary fission, to produce two daughter cells. In protists, binary fission can be divided into transverse or longitudinal, depending on the axis of orientation; sometimes Paramecium exhibits this method.