Animalscaretips
Characteristics. The most notable shared characteristic is the presence of cortical (outer-region) alveoli (sacs). These are flattened vesicles (sacs) packed into a continuous layer just under the membrane and supporting it, typically forming a flexible pellicle (thin skin).
- What are alveolates characterized by?
- Are alveolates unicellular?
- Are alveolates multicellular?
- What protozoa are in the alveolates group?
- Which structure of locomotion is characteristic of Amoebozoa?
- Are all Stramenopiles photosynthetic?
- How do Alveolates reproduce?
- Are Alveolates free living predators?
- Are Rhizaria heterotrophic?
- What are the four supergroups of protists?
- Which of the following features are found in at least some brown algae?
- Which of the following are characteristics of the green algae?
- What is a Kinetoplast quizlet?
- Are Apicomplexans dinoflagellates?
What are alveolates characterized by?
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.
Are alveolates unicellular?
B. The ciliate life cycle. Ciliates are a monophyletic group of unicellular organisms belonging to the Alveolates, one of the major phyla that emerged at about the same time as plants and the metazoan/fungi clade during the “Big Bang” of eukaryotic evolution (Philippe et al., 2000).
Are alveolates multicellular?
Animals, plants, and other multicellular organisms are a drop in the ocean of eukaryotic diversity. ... The alveolates are an ancient group of eukaryotes that occupy a diverse array of ecological niches, both free-living and parasitic.
What protozoa are in the alveolates group?
Three groups of Protozoa, the ciliates, dinoflagellates and sporozoans have been grouped together as 'alveolates' because typical cells in all three groups have a pair of subsurface membranes, forming inflated or flattened alveoli (fluid-filled cushions), beneath the surface membrane.
Which structure of locomotion is characteristic of Amoebozoa?
Amoebozoa are characterized by the presence of pseudopodia, which are extensions that can be either tube-like or flat lobes and are used for locomotion and feeding. Amooebozoa can be further divided into subclassifications that include slime molds; these can be found as both plasmodial and cellular types.
Are all Stramenopiles photosynthetic?
Stramenopiles (also called the heterokonts) are a vast and complex group of organisms that consist of both photosynthetic and nonphotosynthetic cell types as well as unicellular and multicellular species (Andersen, 2004).
How do Alveolates reproduce?
This pre-micronucleus undergoes three rounds of mitosis to produce eight copies, while the original macronucleus disintegrates. Four of the eight pre-micronuclei become full-fledged micronuclei, whereas the other four perform multiple rounds of DNA replication and then become new macronuclei.
Are Alveolates free living predators?
The alveolates are an ancient group of eukaryotes that occupy a diverse array of ecological niches, both free-living and parasitic. ... The majority of ciliates are free-living predators, although parasitism appears to have evolved several times [1,7].
Are Rhizaria heterotrophic?
Two major subclassifications of Rhizaria include Forams and Radiolarians. Forams are characterized as unicellular heterotrophic protists that have porous shells, referred to as tests, which can contain photosynthetic algae that the foram can use as a nutrient source.
What are the four supergroups of protists?
The majority view at present is to order all eukaryotes into six supergroups: Archaeplastida, Amoebozoa, Opisthokonta, Rhizaria, Chromalveolata, and Excavata.
Which of the following features are found in at least some brown algae?
Which of the following features are found in at least some brown algae? They are multicellular. They can be very large.
Which of the following are characteristics of the green algae?
Green algae have chloroplasts that contain chlorophyll a and b, giving them a bright green color, as well as the accessory pigments beta carotene (red-orange) and xanthophylls (yellow) in stacked thylakoids. The cell walls of green algae usually contain cellulose, and they store carbohydrate in the form of starch.
What is a Kinetoplast quizlet?
A kinetoplast is a large mass of DNA in the mitochondrion of a kinetoplastid such as the trypanosomes, which cause African sleeping sickness and Chagas disease.
Are Apicomplexans dinoflagellates?
Moreover, the closest algal relatives to the apicomplexans are dinoflagellates, and dinoflagellate plastids are equally derived but in different ways. Characterized dinoflagellate plastid genomes encode only 12–14 genes, which are extremely fast-evolving and are localized on minicircles with one or a few genes (3).
