What is the thallus in brown algae?
Brown algae have a body, called a thallus, which is a fairly simple, undifferentiated structure. Some thalli consist of simple branched filaments. Some brown algae have more complex structures called pseudoparenchyma because they superficially resemble the more complex tissues of higher plants.
What are the two features of brown algae?
Two features of brown algae (phaeophyceae) are: Their cell wall is composed of cellulose and algin. They show great variation in size and form.
- Their cell wall is composed of cellulose and algin.
- They show great variation in size and form.
What is the niche of brown algae?
Brown algae have adapted to a wide variety of marine ecological niches including the tidal splash zone, rock pools, the whole intertidal zone and relatively deep near shore waters. They are an important constituent of some brackish water ecosystems, and have colonized freshwater on a maximum of six known occasions.
Is dinoflagellates unicellular or multicellular?
unicellular protists
Dinoflagellates are unicellular protists which exhibit a great diversity of form.
How does brown algae differ from diatoms?
Brown algae are exclusively multicellular and found in marine habitats, most typically in the intertidal zone. Their cell walls contain cellulose and they store their carbohydrates as laminarin. Diatoms are exclusively unicellular and found in almost every habitat where there is water.
What are the characteristic features of brown algae?
General Characteristics of Brown Algae
- They have a root-like structure called a holdfast, which anchors them to their substrate.
- There is a small stalk present, which is more like a stem.
- They have a flattened structure called the lamina, blade or frond, which resembles leaves.
Is brown algae autotrophic or heterotrophic?
Autotrophic Protists Four of the major taxa are Chlorophyta (green algae), Rhodophyta (red algae), Phaeophyta (brown algae), and Chrysophyta (diatoms).
Are dinoflagellates benthic or planktonic?
The majority of dinoflagellates are planktonic and only small percentage is benthic (Hoppenrath et al., 2014). Benthic dinoflagellates are usually found in the interstitial spaces between sand grains and in the intertidal shallow zone where mixing is observed.