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JordanEuglena are unicellular organisms classified into the Kingdom Protista, and the Phylum Euglenophyta. All euglena have chloroplasts and can make their own food by photosynthesis. They are not completely autotrophic though, euglena can also absorb food from their environment; euglena usually live in quiet ponds or puddles.
Euglena move by a flagellum (plural ' flagella), which is a long whip-like structure that acts like a little motor. The flagellum is located on the anterior (front) end, and twirls in such a way as to pull the cell through the water. It is attached at an inward pocket called the reservoir. Color the reservoir grey and the flagellum black.
The Euglena is unique in that it is both heterotrophic (must consume food) and autotrophic (can make its own food). Chloroplasts within the euglena trap sunlight that is used for photosynthesis, and can be seen as several rod like structures throughout the cell.Color the chloroplasts green. Euglena also have an eyespot at the anterior end that detects light, it can be seen near the reservoir. This helps the euglena find bright areas to gather sunlight to make their food. Color the eyespot red. Euglena can also gain nutrients by absorbing them across their cell membrane, hence they become heterotrophic when light is not available, and they cannot photosynthesize.
The euglena has a stiff pellicle outside the cell membrane that helps it keep its shape, though the pellicle is somewhat flexible and some euglena can be observed scrunching up and moving in an inchworm type fashion. Color the pellicle blue.
In the center of the cell is the nucleus, which contains the cell's DNA and controls the cell's activities. The nucleolus can be seen within the nucleus. Color the nucleus purple, and the nucleolus pink.
The interior of the cell contains a jelly-like fluid substance called cytoplasm. Color the cytoplasm light yellow. Toward the posterior of the cell is a star-like structure: the contractile vacuole. This organelle helps the cell remove excess water, and without it the euglena could take in some much water due to osmosis that the cell would explode. Color the contractile vacuole orange.
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Why is photosynthesis essential for the survival of the Euglena?
Photosynthesis is essential for Euglena's survival because it is the process by which Euglena produces food (glucose) using sunlight, water, and carbon dioxide. This food provides the energy needed for Euglena to carry out its life processes and functions. Without photosynthesis, Euglena would not be able to sustain itself and would eventually die.
What are the different types of euglena?
There are two main types of Euglena: autotrophic Euglena that can photosynthesize and heterotrophic Euglena that must ingest food particles to survive. Autotrophic Euglena have chloroplasts and can produce their own food through photosynthesis, while heterotrophic Euglena do not have chloroplasts and rely on absorbing nutrients from their environment.
Is the body of euglena rigid or flexible?
The body of Euglena is flexible due to the presence of a proteinaceous pellicle layer that allows the organism to change its shape as it moves through its environment. This flexibility enables Euglena to exhibit a wide range of motion and perform functions like phototaxis.
Does euglena have a endoplasmic reticulum?
Yes, Euglena, like other eukaryotic cells, has an endoplasmic retreticulum (ER). The ER in Euglena is involved in various functions such as protein synthesis, lipid metabolism, and the transport of molecules within the cell.
What are the four membranes in an amniotic egg.?
The amniotic egg has seven different parts that play different functions. The seven parts include the shell, albumen, chorion, yolk, allantois, ammunion and embryo.
