10. What is the function of water in photosynthesis?

Water is an electron donor. It is splitting on the light with a help of photosystem 2 and provides the electrons for all of photosynthesis to occur.

11. Can water produce negative effect on the human body?

Water intoxication, also known as water poisoning or hyperhydration, is a potentially fatal condition that results when the normal balance of electrolytes in the body is pushed outside safe limits by excessive water intake. Nearly all deaths related to water intoxication in normal individuals have resulted either from water-drinking contests or from long bouts of exercise during which excessive amounts of fluid were consumed.

12. What is dehydration? What negative consequences can it cause?

Dehydration is a condition that results when the body loses more water than it takes in. The total volume of body fluid can fall and blood volume may drop. If this happens, two potentially life-threatening problems arise: sweating stops and body temperature can soar even higher, while blood pressure decreases because of the low blood volume. Under such conditions, death occurs quickly. Beсause of their rela- tively larger skin surface-to-volume ratio, children are especially susceptible to rapid overheating and dehydration.

13. What determines the differences in the daily water consumption of dif­ferent classes of animals — amphibians, reptiles, birds, mammals?

Differences in daily water consumption by different classes of animals depend on their habitat, climatic conditions, temperature and humidity, and the age of the animal is no less important. In addition, the physiological activity of the animal, the composition of its diet, the level of productivity, the state of the body (newborn, pregnancy, lactation) plays an important role in the difference. The ratio of consumed water to the dry matter of feed consumed depends on the moisture content of the latter.

14. Do freshwater and saltwater kinds of fish have any difference in metabolism?

Yes, there is a difference in metabolism. The habitat of freshwater fish is more polluted than the open spaces of the sea, so the likelihood of particles of heavy metals, pesticides and other harmful substances in the body is much greater than that of marine ones. In addition, salt water filtration is unique in marine fish.

15. Can distilled water be used for drinking?

On the one hand, it is believed that such water is dead and destructive for all living things, since there are no trace elements in it that could be useful for the body, only pure H2O. However, on the other hand, it does not contain minerals; however, toxins, toxins and other components that are killer to humans cannot be found in it either. But I believe that it is not only possible to use liquid purified from impurities and extraneous components for drinking, but it is also necessary.

16. What is a fungus? Why are fungi classified into a separate Kingdom?

Fungus are living organisms that are neither plants nor animals. They combine the characteristics of both those and others. Like plants, fungi are motionless, have strong cell walls and are able to take root in the soil. At the same time, they, like animals, they eat ready-made organic substances and can store carbohydrates in the form of glycogen. Therefore, they were allocated to a separate kingdom.

17. Are fungi unicellular or multicellular organisms?

Most fungi are multicellular organisms, but there are also unicellular forms, such as yeast and mucor. A distinctive feature of multicellular fungi is the presence of organs such as hyphae, pileus (mushroom cap) and stipe (mushroom stem).