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The migration and transformation of heavy metals in soil are mainly physical and chemical processes This is a judgment question, right or wrong! Some textbooks also say that there are mainly physics,
The following is the knowledge about the migration and transformation of heavy metals in soil. First of all, soil is a heterogeneous porous system. Pollutants can be volatilized, diluted, diffused and concentrated in the soil to move out of the soil
What is the difference between transformation and transduction?
This is a problem of gene recombination
Transformation is the absorption of foreign DNA fragments by bacteria
Phage is the carrier of DNA transduction
Conjugation is the direct exchange of DNA between two bacteria through sexual pili
The difference between transformation and transposition
Transformation: exogenous genetic material (plasmid DNA) enters into bacteria, causing changes in bacterial genetic properties. Transfection: the process of exogenous gene infecting cells or individuals through virus or phage
RELATED INFORMATIONS
- 1. The difference between energy conversion and transfer
- 2. Junior high school physics: energy conversion, about internal energy Please give examples of the life in which internal energy is converted into other forms of energy and other forms of energy are converted into internal energy In addition, when baking bread in an electric oven, is it right that electric energy is converted into internal energy? Generally speaking, most of the internal energy is converted into other energy by gas or liquid? In addition, can the energy of solid be converted into internal energy by other energy? Isn't its molecular structure very stable?
- 3. If the two bulbs of "220 V & nbsp; 25W" and "220 V & nbsp; 40W" are connected in parallel to the 220 V circuit first, and then connected in series to the same circuit, then () A. The total power consumption of two lamps connected in parallel is greater than that in series D. the total power consumption of two lamps connected in series is greater than that in parallel
- 4. 8. The Chang'e-1 lunar exploration satellite developed by our country runs along the elliptical orbit with the near moon point and the far moon point. When the satellite moves from the near moon point to the far moon point, the satellite () increases () decreases (both filled with "kinetic energy" or "gravitational potential energy")
- 5. The control variable method is used in those experiments in junior high school physics learning
- 6. What are the control variables of physics experiment in junior high school Let's give examples instead of big discussions. Let's name each one
- 7. On the experiment of "control variable method"
- 8. What is the difference between the control test method and the control variable method How to choose? Is there a difference between doing it at the same time and not at the same time?
- 9. How much does a physics book weigh And the weight of a desk, the weight of an apple
- 10. Now I'm in the second year of junior high school. I want to buy a physics book. Please introduce it to me Such as the title, recommend good I give bonus points!
- 11. Discussion on energy transformation or transfer in junior high school physics State how the following energy is transformed or transferred 1. Rocket points and then soars 2. The flying meteor has a luminous tail People feel warm when they are in the sun 4. Use solar water heater to boil water 5. When the tube filled with water blocked by the plug is heated, the plug is flushed open Thank you~~~
- 12. What is equivalent substitution method?
- 13. Equivalent substitution method i want!
- 14. What is the physical meaning of D in D-value method?
- 15. What is the relationship between transformation method and amplification method in physics experiment? Please give an example to explain it in detail
- 16. Male wire is a unit of length measured in one degree. How many millimeters is a male wire equal to?
- 17. How many meters is a yard? A French unit of length, not a British or American unit
- 18. Conversion of physical unit rate in grade two of junior high school Let's not talk about other things. Now I've just studied physics. I've just learned kilometer meter, decimeter, centimeter, millimeter, micrometer and nanometer. The progress rate in these books is only from meter to millimeter, micrometer and nanometer. But I'm dizzy. If decimeter is replaced by micrometer or nanometer, how much progress rate is I stupid
- 19. 180km/h=（）km/min=（）m/s 8m/s=（）m/min=（）km/s
- 20. A cube iron block with side length of 1dm, immersed in water When the iron block is completely immersed in water and its upper surface is 0.5 DM away from the liquid level, the upper and lower surfaces of the iron block are subjected to pressure difference and buoyancy