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Some people think that living things are living things. Indeed, all living things are alive. So, on the other hand, are all living objects living things?
The answer is no! Because not only living things have life, but also a part of living things can have life. For example, a green leaf, a heart to be transplanted, red blood cells and white blood cells in blood.
However, these living objects, one would not consider them to belong to living beings. So, living objects are not necessarily living things.
So the definition of a living being: A living thing is a collection of objects, the elements of which include: living objects with viability and reproductive ability generated by chemical reactions under natural conditions and living offspring produced by it (or them) through reproduction.
It is living and can reproduce offspring.
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Plants like people, birds, beasts, flowers, trees, vegetables, and so on are living things, like a rock on a mountain, it's not a living thing, and in general, it's all living things.
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Nothing is inseparable from "biology", because the 21st century has entered the field of biological research.
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Living objects are living things! Flowers and trees, birds and fish, reptiles and animals, as well as bacteria and viruses, are all living things. Robots are not living creatures.
Organisms have several characteristics: metabolism, reproductive development, genetic variation, adaptation and influence of the environment, and stress. And most living things (with the exception of viruses) are made up of cellular structures.
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In biology class, the most important thing is to understand, to know the characteristics of each thing or object you have learned, and to ask yourself "why is this object the way it is?" after a long time, you will know and understand.
When you understand everything you have learned, then your exam will not be a problem, of course, if you really like biology, I believe you will do it.
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Just study hard! Of course, the right way to study is also important.
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Hypothesis: You don't need air to live in a child.
Experimental design: two groups of children were taken, group A closed the container, and the air was extracted and nitrogen was injected; Group B is not treated. Leave it for a while and observe the living conditions of the two groups of children.
The lack of oxygen in vessel A causes the child to die of lack of oxygen.
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Combined with personal learning experience:
High school: Listen carefully in class, pay full attention, understand some principles, such as photosynthesis, respiration, and do not need to memorize; Then complete the homework assigned by the teacher;
Undergraduate: Listen carefully in class, brush up on questions, and do the wrong questions until you get them right.
The above methods are only for test-oriented education.
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To memorize it as a liberal arts subject, you must be familiar with textbooks.
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The molecular weight of glucose is 180, the molecular weight of alcohol is 46, one glucose can produce 2 alcohols, 180 tons of alcohol require 90 tons of glucose, so 90 m tons of corn are needed. Pick B
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The reaction is catalyzed by anaerobic respiration of yeast. 1 part glucose produces 2 parts alcohol.
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The ratio of glucose to alcohol conversion should be in contact with chemistry.
Calculate glucose from alcohol, and then calculate corn.
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How can this need a master?
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Super simply.
Answer: Option B: Yeast fermentation produces alcohol, and the equation is as follows.
C6H12O6 2]C2H5OH + 2]CO2 + Energy Glucose Molar Mass is 180g Mole Alcohol Molar Mass is 46g Mole Tons, just ignore this unit.
46 is 1mol
According to the equation coefficient ratio Alcohol:Glucose = 2:1=1mol:
Then the mass of glucose is.
Each ton of corn can be converted to m tons of glucose, and the conversion rate is 90 m when m is needed for 90 glucose and corn is needed
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The lack of oxygen in the air, such as the water in the pond, can lead to the mass death of fish; Soil properties, such as only certain plants growing in saline soils (the answer is not unique).
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13——c
14 – A15 – Community, Individual, Environment, Consumer (guessed).
16——12345;78;45;There is a nucleus; does not have a cellular structure; DNA vs. proteins.
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It's too mushy, let's separate the topics.
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First, read the question stem to determine which part of the content it is, and recall the main content in your mind. If not, carefully examine the questions it asks and the content it is related to. You'll have in your head what you've memorized before.
The premise of getting a high score is that the foundation must be good, and the things that are required to be memorized must be memorized carefully, and the corresponding question types of the chapters must be practiced. That's all, I wish you good luck.
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I really lack virtue on this topic.
The antigen (virus) from the outside world enters our body through the opening in our body, and then it multiplies in our body, and then it synthesizes proteins, and then it affects our body, and then our body slowly produces antibodies to pull, and then the antibodies defeat the antigens, and then the disease is cured.
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I don't know how to say it, I found something, you can take a look, I hope it helps.
Hybrid rice, seedless watermelon, genetically modified crops. Artificial organs, various antibiotics and vaccines and other medicines, as well as wine, vinegar, wine, yogurt, ......
Simplify, e.g. don't = table.
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