What are the main characteristics of chromalveolata?

03/20/2019 Off By admin

What are the main characteristics of chromalveolata?

The unifying feature of this group is the presence of a textured, or “hairy,” flagellum. Many stramenopiles also have an additional flagellum that lacks hair-like projections (Figure 6). Members of this subgroup range in size from single-celled diatoms to the massive and multicellular kelp.

How are Alveolates characterized?

The alveolates are protists characterized by the presence of sacs of fluid under the cell membrane. These sacs, which are fluids enclosed by lipid fat or wax, are called alveoli, hence the name alveolates.

Which of the following are characteristic of foraminifera?

Foraminifera are enormously successful organisms and a dominant deep-sea life form. These amoeboid protists are characterized by a netlike (granuloreticulate) system of pseudopodia and a life cycle that is often complex but typically involves an alternation of sexual and asexual generations.

Is chromalveolata a supergroup?

Chromalveolata was an eukaryote supergroup present in a major classification of 2005, then regarded as one of the six major groups within the eukaryotes. Chromalveolata was proposed to represent the organisms descended from a single secondary endosymbiosis involving a red alga and a bikont.

What characteristics do Stramenopiles have?

Stramenopiles. Stramenopiles (also known as heterokonts) usually have a flagellate stage in the life cycle that has a characteristic type of stiff tubular ‘hairs’ arranged in two rows on one flagellum (see Patterson, 1999). These flagellates swim in the direction the hair-bearing flagellum is pointing.

What are examples of Alveolates?

Alveolate/Lower classifications

Are Foraminiferans Alveolates?

Alveoplates include some of the most familiar and numerous protist groups, including the Ciliata, or ciliates, such as Paramecium and Stentor. The ciliates are the most diverse group of heterotrophic protists, with 7000 species. Also very diverse, though not as familiar, are the Foraminifera.

Are foraminifera microbes?

Large benthic Foraminifera (LBF) are major carbonate producers on coral reefs, and are hosts to a diverse symbiotic microbial community. Symbiont identity is a key factor enabling LBF to expand their geographic ranges when the sea-surface temperature increases.

Which organisms are parasitic Alveolates that cause malaria?

Several of its members are causative agents of human diseases. Malaria, which is caused by members of the genus Plasmodium, is a major global health problem resulting in more than half a million of deaths per year (White et al., 2014). Like many other apicomplexan parasites, Plasmodium has a complex life cycle.

How are the alveolates related to the cell membrane?

A large body of data supports that the alveolates are derived from a shared common ancestor. The alveolates are named for the presence of an alveolus, or membrane-enclosed sac, beneath the cell membrane. The exact function of the alveolus is unknown, but it may be involved in osmoregulation.

What are the characteristics of a Chromalveolata?

Chromalveolata. Morphology Chromalveolates, unlike other groups with multicellular representatives, do not have very many common morphological characteristics. Each major subgroup has certain unique features, including the alveoli of the Alveolata, the haptonema of the Haptophyta, the ejectisome of the Crytophyta,…

How are the alveolates different from other protists?

The alveolates are named for the presence of an alveolus, or membrane-enclosed sac, beneath the cell membrane. The exact function of the alveolus is unknown, but it may be involved in osmoregulation. The alveolates are further categorized into the dinoflagellates, the apicomplexans, and the ciliates.

Who is the founder of the Chromalveolata supergroup?

Chromalveolata is a eukaryote supergroup first proposed by Thomas Cavalier-Smith as a refinement of his kingdom Chromista, which was first proposed in 1981. It was proposed to represent the result of a single secondary endosymbiosis of a line descending from a bikont with a red alga that became the progenitor of chlorophyll-c containing plastids.