CHEMISTRY HIGH SCHOOL

The transfer of a section of Dna from one organism into the Dna of another organism by scientists is called

Answers

Answer 1
Answer: Genetic Modification

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When rocks break down because of chemical reactions it is called

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When rocks break down because of chemical reactions it is called chemical weathering. The rocks are weakened and subsequent disintegration of rock by chemical reactions. They can be oxidation, hydrolysis and carbonation.

Helen is standing in the hallway with her friend Janet, next to Helen's locker. Each girl has a body mass of 48 kilograms (kg), and thus each exerts a force of 470.4 Newtons (N) on the hall floor. What is the total force, in Newtons (N), that the hall floor exerts on the pair of girls?A. 940.8 N
B. 96 N
C. 960.4 N
D. 48 N

Answers

The right answer for the question that is being asked and shown above is that: "A. 940.8 N." Helen is standing in the hallway with her friend Janet, next to Helen's locker. Each girl has a body mass of 48 kilograms (kg), and thus each exerts a force of 470.4 Newtons (N) on the hall floor.

Free radicals are molecules which: A)Damage cell membranes, DNA, and LDL. B)Steal electrons from molecules of surrounding tissues. C)All answers are correct. D)Are highly unstable. E)Are missing an electron.

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C) All answers are correct. Free radicals damage cell membranes, DNA, and LDL, steal electrons from molecules of surrounding tissues, are highly unstable, and are missing an electron

What ions are in water all the time?

Answers

Answer:

(Ca2 +, Mg2 +, Na+, and K+) and four major anions ( , , SO 4 2 - , and Cl-) with ionic forms of N, P, Fe, and other trace elements at lower concentrations (Livingstone 1963, Meybeck 1979) (Table 4.7).

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A. Chlorine
B. Sulfur
C. Oxygen
D. None of the above

Answers

Answer:

D. None of the above

Explanation:

All the answer choices listed only have 2-3 items in the electron configuration.

46 What occurs at one of the electrodes in both an electrolytic cell and a voltaic ccl1?( I) Oxidation occurs as electrons arc gained at the cathode.
(2) Oxidation occurs as electrons are lost at the anode.(3) Reduction occurs as electrons are gained at the anode.
(4) Reduction occurs as electrons are lost at the cathode.

Answers

Oxidation occurs as electrons are lost at the anode at one of the electrodes in both an electrolytic cell and a voltaic cell. The answer is number 2. The rest of the choices does not answer the question given above.
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