Answer: ;-; wut? i- my brain cells you just killed my brain cells in 1 sec i-
Explanation:
Answer:
The correct answer is b. He determined that DNA contains four nitrogenous bases.
Explanation:
Levene was an American biochemist who studied the structure of DNA in the early 1900s and in 1920 he found that DNA consists of four nitrogenous bases that are Adenine, Guanine, Thymine, Cytosine.
He also found deoxyribose sugar and phosphate group and said that nucleotide is the basic unit of DNA which contains a ribose sugar with attached nitrogenous base and phosphate group.
He also concludes that an equal amount of adenine, guanine, thymine, and cytosine makes the DNA which is now known as tetranucleotide hypothesis. So the correct answer is b. He determined that DNA contains four nitrogenous bases.
herbicide
insecticide
rodenticide
Answer: The correct answer is herbicide
Explanation: This answer has been confirmed correct.
Herbicides are designed to interfere with plant growth to stop the spread of undesirable plants or weeds.
B) sugar; chemical energy
C) chemical; H2O
D) electrical; H2O
In the light dependent photosynthetic reactions, light energy is converted into chemical energy, which is stored in molecules like ATP. Then, in the
light independent photosynthetic reactions, this energy is used to convert CO2 into sugar.
The answer is letter A) chemical; sugars