Type Protozoa. Infusoria.

Ciliates are the most highly organized protozoa. The body shape is varied. Single movable or attached forms. Ciliates are covered with cilia, which contribute to the rapid movement and fluctuation of the flow of water near the mouth opening.

This is a thriving group of animals, to which more than seven thousand species belong. It can be said that evolution, having begun “sculpting” the body of protozoa from the shapelessness of the amoeba, gradually created a certain form of ciliates. Ciliates feed on protozoa, unicellular algae.

The infusoria has two nuclei. Apparently, one nucleus can participate in life processes, while the second one stores information and participates only in sexual processes.

Match the numbers.

Big core (__)

Cytoplasm (__)

Contractile vacuole (__)

Throat (__)

Digestive vacuole (__)

Powder (__)

Eyelashes (__)

Small core (__)

The shoe is not safe. When irritated, long thin threads “shoot” from the surface of the body, and they really look like arrows, moreover, apparently poisonous, hitting the enemy or prey. Two “pumps” work in the body of the shoe – two contractile vacuoles that constantly pump out excess water from it. Reducing, every ten seconds, in half an hour they “pour out” an amount of water from the shoe, equal in volume to itself.

What process is shown in the picture?

Answer: _____________________

The most amazing thing is that even the simplest unicellular organisms, marine ciliates, managed to achieve life in the surf. Their life cycle clearly corresponds to the rhythms of the ebb and flow. 18 hours at low tide, the ciliates are in a state of cysts, that is, they are covered with a thick shell that protects them from drying out, and 6 hours of the tide are floating freely. Such a cycle allows ciliates to survive even on wet sand, if they are thrown far ashore by a strong wave. Another “ninth wave” washes the ciliates into the sea again. Before low tide, ciliates, as if on cue, begin to turn into cysts that settle on algae. In the experiment, scientists created conditions when the ebb and flow alternated more often than it happens in nature, and the ciliates very quickly “learned” to cover themselves with protective shells at the right time.

Find words.

Here the protozoa “hid” themselves. Find them. Letters cannot be reused.

Test “The simplest”.

1. All plant flagellates can photosynthesize and feed like plants. Why? They have…

c xanthophyll

c chlorophyll

c chromophyll

2. All plant flagellates lead …

c free lifestyle

c healthy lifestyle

c parasitic lifestyle

3. Protozoa parasitizing in the human intestine.

c trypanosoma and leishmania

c trichomonas and giardia

c infusoria-shoe

4. A characteristic difference between ciliates and other protozoa.

c lead an attached lifestyle

c presence of eyelashes

c the presence of two nuclei of different sizes

5. She eats in the light like a plant, and in the dark like an animal.

c chlamydomonas

c forticella

c carchesium

6. Colony of flagellated protozoa.

c chlorella

c volvox

c chlorix

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