What is elphidium Crispum?
Elphidium shows dimorphism with alternating generations. The complete cycle for Elphidium crispum takes two years in the shallower marine regions, although it may be delayed at deeper stations. Elphidium exhibits an alternation of generation in its life cycle. The megalosperic forms alternates with microspheric forms.
What is meant by elphidium?
Wikipedia. Elphidium. Elphidium is an abundant genus of foraminifera. Species can be found from coastal regions out to the continental slope, and in all temperature ranges. Like other forams, fossils from different species are used to date rocks.
What is reproduction in protozoa?
Most protozoa reproduce asexually by cell division producing two equal or sometimes unequal cells. The cell division in certain protozoa is longitudinal, while in others transverse. In some protozoa multiple fission or schizogamy is known to occur. Many protozoa also reproduce asexually by budding.
What are the Locomotory structure of elphidium?
The pseudopodia of Elphidium are in the form of numerous fine and often very long slender thread-like structures, which are often branched and anastomosing. This type of pseudopodia are characteristically called reticulopodia, rhizopodia or myxopodia.
What are the characteristics of phylum Protozoa?
Salient features of Phylum Protozoa:
- i. They have unicellular level of organisation.
- ii. They are mostly aquatic (freshwater or marine).
- iii. They can be solitary, colonial, free-living, parasitic or symbiotic.
- iv. Their body shape can be irregular, spherical, oval, elongated or flattened.
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What are the different methods of reproduction in protozoa?
During asexual reproduction, protozoa follow different methods such as binary fission, multiple fission, and budding. If two daughter cells are produced then this process is called binary fission, if more than two daughter cells are produced then the method is termed as multiple fission.
What are the different ways that protozoans reproduce?
Protozoa reproduce asexually by fission, schizogony, or budding. Some protozoa can also reproduce sexually. Relatively few protozoa cause disease. The vegetative, reproducing, feeding form of a protozoan is called a trophozoite.
What is locomotion in protozoa?
Protozoans exhibit diverse modes of locomotion across the various groups, but the modes of locomotion can be broadly divided into flagellar, ciliary, and amoeboid movement. In contrast, flagella and pseudopodia are present in a wide variety of distantly related taxa.
What are the classification of phylum protozoa?
Approximately, 50,000 types of Phylum Protozoa have been identified. Its four divisions are Amoeboid Protozoa or Sarcodines, Flagellated protozoans or Zooflagellates, Ciliated protozoa or Ciliates and the Sporozoans.
What types of asexual reproduction in protozoa?
Asexual reproduction in protozoa includes binary fission, multiple fission, and budding. Binary fission produces two usually identical daughter cells by mitotic division.
What are the forms of asexual reproduction in protozoa?
The most common form of asexual reproduction used by protozoa is binary fission. In binary fission, the organism duplicates its cell parts and then divides itself into two separate organisms. Two other forms of asexual reproduction used by protozoa are called budding and schizogony.