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Why is a Volvo a unicellular organism? The structure of algae wolvox

There are so many wonderful microscopic organisms in the world. If someone had thought of making a list of seven miracles of the microworld, algae volvoix would certainly have been included in this list.

Green algae

Wolvox is green algae. They exist in the form of a colony. Why is a Volvo a unicellular organism? The answer arises rather simple: each individual small alga is a cage that has two flagella and hairs.

Single cells are connected to each other by thin cytoplasmic filaments, which allow the entire colony to swim in concert. Individual representatives besides hairs and flagella also have a small red speck, the so-called peephole.

Differentiation of cells gives uniqueness to algae. Each colony has a beginning and an end, in other words, the North and South Pole. In the first region there is a more pronounced accumulation of developed eyes. This helps the algae to sail towards the light. Thus, the colony of unicellular organisms externally may well descend for a multicellular organism.

Volvox: building

When answering the question why volvoix is referred to single-celled organisms, it is worth mentioning that a single cell can reach 2 millimeters in diameter (in larger colonies - up to 2 cm), so they can easily be seen with the naked eye. Separate algae are connected by thin cytoplasmic filaments.

Algae wolvox structure is quite simple. The central cavity is filled with mucus. All cells have two flagella, which are attached at the anterior end. Each cell in the cell fulfills its function of nutrition, respiration and excretion. The shape can be spherical, elliptical or oval. The outer layer is also covered with mucus. Each cell has one eye in the form of a spot on the front end.

Reproduction

Ways of reproduction in algae wolvox are quite interesting and even exciting. They can reproduce both asexually and sexually. On close examination, one can see that the majority of colonies have within them specific spheres called gonads.

This is a sign of asexual reproduction. Gonads are grown from cells around the equator of the colony. These cells increase and pass a series of divisions until they form small spheres. In this case, the flagella find themselves inside a new circle. To extract them, the cell must turn itself inside out.

Wolvox can reproduce to themselves similar also sexually. Like asexual reproduction, special cells accumulate around the equator. The male and the female create colonies of various germ cells.

Spermatozoa are formed by division. Female sex cells do not divide, but simply increase in size. Most species have both male and female colonies. And some are hermaphrodites.

Wolvox and sunlight

Observation of groups of colonies under a light microscope is a truly spectacular sight. If you leave enough space under the lid to slide, the small green spheres will slowly float toward the backlight.

Finding a Volvo is very easy. All they need is a fairly clean and warm water, rich in nutrients. The right time for observation is summer. Having scooped up some green samples, you can see how in a jar of water from a "flowering pond" algae will be drawn to the light.

Habitat

Why is a Volvo a unicellular organism? Let's figure it out. Wolvox has a unicellular structure, it can not exist alone, so it often forms spherical colonies with a capacity of up to 50,000 individuals. It's not just a cage, it's a whole microscopic organism. In it, their vital processes occur. That's why volvox is referred to as single-celled organisms.

A favorable habitat for such algae are fresh water bodies. These microorganisms are found in ponds, ditches and even in shallow puddles. Algae volvos are one of the most ancient on the planet. Under the assumptions of scientists, such a colonial way of life they had led 200 million years ago.

Volvox is the most developed organism of its kind. It forms globular, ellipsoidal or ovoid colonies. Chlorophyll is contained in algal cells, which is why they themselves produce food by photosynthesis. Each individual cell works for the benefit of its colony, and together they act as one organism.

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