Explain 20 simple scientific phenomena in biology

Here are the five principles of ecology.

1. The principle of material recycling and regeneration. For example: waste-free agriculture, biogas utilization.

2. The principle of species diversity. For example:

Forest ecosystems, grassland ecosystems.

3. The principle of coordination and balance. For example:

Three-North Shelterbelts and Desert Shelterbelts need to be adapted to local conditions.

4. The principle of wholeness. For example: the wholeness of humans and nature, the wholeness of animals and nature.

5. Principles of systematics and engineering. For example: fish and duck farming in rice fields, grazing in grasslands.

The following is the concept of ecology.

1. Ecology is the science that studies the interrelationship between organisms and the environment and their mechanism of action.

1. The survival, activity, and reproduction of organisms require a certain amount of space, material and energy. In the process of long-term evolution, organisms gradually develop special needs for certain physical conditions and chemical components of the surrounding environment, such as air, light, moisture, heat and inorganic salts.

2. The materials and energy required by various organisms and the physical and chemical conditions to which they adapt are different, and this characteristic is called the ecological characteristics of species.

Second, due to the rapid population growth and the extreme pressure on the environment and resources caused by human disturbances.

1. Human beings urgently need to master ecological theories to adjust the relationship between man and nature, resources and the environment, coordinate the relationship between social and economic development and ecological environment, and promote sustainable development.

2. There is mutual assistance and competition between individuals of the same species; Plants, animals, microecology.

Third, there is also a complex relationship between organisms.

1. In order to meet their own needs, human beings constantly transform the environment, and the environment in turn affects human beings. With the expansion and diversification of the scope of human activities. The relationship between human beings and the environment is becoming more and more prominent.

2. The scope of modern ecological research, in addition to biological individuals, populations and vertical biomes, has been expanded to the complex system of various types of ecosystems, including human society. Several major problems faced by human beings, such as population, resources, and environment, are the research content of ecology.

Big Birds Raise Small Birds – Congenital Behavior.

Children learn to speak – learn to behave.

People get athlete's foot - fungal parasitism.

The corpse will decompose - the saprophyte of fungi.

Dead trees grow mushrooms – fungi that act as decomposers in the biosphere.

1.In winter, farmers often dig vegetable cellars to store vegetables. Every time they pick up vegetables, farmers always open the opening of the vegetable cellar for a while, and only after a while do they go down to the cellar to pick up vegetables to prevent hypoxia!

This is because stored vegetables can also respire, consume oxygen, exhale carbon dioxide, and if effective measures are not taken, accidents may occur in the cellar. 2.

When there are seeds stored in the granary, if you look closely, you will see that there are often many small windows open above the granary. Give the seeds oxygen for the seeds to breathe!

The seed is in a dormant period.

cells, but let need to breathe, severe hypoxia will die. Moreover, it should be kept ventilated, because the seeds will heat up when they breathe, and improper handling can easily cause seed rot and other consequences... 3.

If you're an observant and problem-spotting person, have you ever noticed that people who live in dry, cold regions have larger nostrils than people who live in warm, humid environments? (Of course, this is related to the results of long-term adaptation of people in different regions, but also related to genetic factors) This is because the human nasal cavity has the effect of warming air, and the longer the air, the longer the nasal cavity is needed to fully warm the air... And the color of the person's **.

Because of melanin... Hehe,,There's more than one anymore...

Why is the ground rotating when looking out the window on the train.

Why does the moon move with people?

Is it better to run or walk in the rain.

Why does the timekeeper at the end of a long-distance race start the time by seeing the smoke of the starting pistol, and why does he see lightning first and then hear thunder?

How was Sun Wukong filmed in the clouds.

Why are bicycles equipped with curved wheel covers on the outside of their wheels?

Is the best angle of throw for throwing a shot put at 45 degrees.

Why you can "drink" soda with a straw.

Why is it more comfortable to sit on a sofa than to sit on a chair.

What does a thimble do.

How does the pneumatic thermos bottle "press" the water out.

Why does cupping "suck" on the **.

Why is the drain pipe of the sink bent.

How a vacuum cleaner is vacuumed.

Why can acrobats lift heavy objects with their teeth?

Why is the thickness of the scale bar uneven?

Why use skis when skiing and skates when skating.

Why do cars mostly use rear-wheel drive front wheels?

Why are the front wheels deeply marked when the car brakes.

Why do table tennis rackets have forward and reverse stickers?

Why are bumper cars not afraid of touching.

Why is the back of a kitchen knife thin and the back of an axe thick.

Why do scissors come in a wide variety of shapes.

Electricians use cement poles to buckle their feet, the heavier the body is, the easier it is to slip off when climbing the pole, why do you have to lift when you pick up heavy objects?

Why it is difficult for people who are close to the wall to stand on one leg.

Why is it harder to lift a creature than to put it down.

Why is the lower part of the dam thicker than the upper part?

Why tightrope walkers often have to carry things in their hands.

Why are the nuts on the machine mostly hexagonal.

Why is it not easy to separate the glass after sticking to water?

Why does the bus slowly stop the moment the passenger leans backwards, why is there only a single layer of plywood.

The ...... of how the ship passes through the locks

There will be day and night every day; That's due to the rotation of the Earth.

3.Birds can fly; That's because the bird creates a pressure difference between the upper and lower wings by flapping its wings, and there is a rising force.

4.When it rains and thunders in the sky, the positive and negative charges meet and are not caused by the thunder male and the electric mother.

5.A solar and lunar eclipse is caused by a change in the relative position of the Sun, Earth, and Moon, not a tengu eat.

6.If you put the chopsticks in a bowl with water, you will see that the chopsticks are bent due to the refraction of light.

7.If you don't put your heart on the smooth ice, you will slip because the friction on the ice is small, so it is more slippery.

8.When it rains, in the open countryside, you see lightning first and then hear thunder, because light travels faster than sound.

9.The reason why traffic lights on the street choose red as a stop signal is because red travels farther than other colors.

10.When climbing, the higher you go, the more cold you feel, and that's because of the low air pressure in the mountains.

There are many days and nights every day, which is the reason why the earth revolves around the sun.

1. Mimosa.

Phenomenon: Stroke the mimosa leaves, the leaves will move.

How it works: Mimosa cells are supported by a small, reticulated protein called actin. When there is a closed motion, the phosphoric acid of femorin will fall off, and as long as the mimosa is allowed to absorb the compound that does not shed the phosphoric acid, it will not change when touched.

Professor Tsuchiya pointed out that when the femoral actin bundle spreads out, the cells are destroyed, and as a result, water escapes out, resulting in a closed motion. Femorin is generally found in the muscle fibers of animals and is associated with muscle contraction. I didn't expect it to be found in mimosa, which is quite rare.

2. The atavistic phenomenon.

Phenomenon: refers to the phenomenon in which an individual organism develops traits that its ancestors possessed. The atavistic phenomenon occurs in many species, such as the hind wings of the Diptera insects, which have degenerated into balanced mallets, but occasionally individuals with two pairs of wings appear; Domestic chickens, ducks, and geese have lost the ability to fly, but occasionally individuals with particularly strong flight abilities will appear.

Human beings also have atavistic phenomena, such as congenital hereditary hirsutism, tail atavistic malformation, accessory milk, and so on.

Principle: Modern genetics has two explanations for atavism: one is that two or more genes necessary to determine a certain trait that have been separated during speciation are recombined through hybridization or other reasons, so that the ancestral trait can be re-manifested; The second is that the genes that determine this ancestral trait are blocked by histone-dominated repressor proteins early in the evolutionary process, but for some reason, specific non-histone proteins are produced, which can bind to histones and cause the repressor proteins to fall off, and as a result, the blocked genes are revived, re-transcribed and translated, showing ancestral traits.

3. Chameleon phenomenon.

The indicative role of organisms shows that the various physical geographical elements are closely interconnected and interdependent. Knowing the regular connection between them, it is possible to use the characteristics of one element to recognize the existence of another.

Theoretically, the earth initially produced the earth's crust, then the atmosphere, the hydrosphere, and finally the vegetation, soil, and animal kingdom. Thus, the older (i.e., first) factors have a greater impact on other younger (i.e., later) factors; The younger the element, the more dependent it is on the other older elements. It is these elements that are the least independent and the most dependent that are most indicative.

Therefore, the influence of plants that appear later has a great ability to express the influence of other elements.

Biological phenomena are the manifestations of the life of all living animals and plants, including fungi, and are called biological phenomena.

The level is limited, which is probably the most popular explanation.