The answer is D
Explanation: You need to have the same number of complementary bases.
The answer to this question would be: excess fluoride intake
The toothpaste has a high amount of fluoride and will increase the blood fluor level. Excess fluoride intake in children can cause fluorosis which was the brown staining of teeth because fluor is deposited in the growing teeth. Fluorosis can happen in children with <8-year ages.
Answer:
The correct answer is option C- "oxidize, reduce".
Explanation:
Fermentation is a process analogous to cellular respiration and, just like the latter, it involves oxidization and reduction of molecules with the final purpose of producing energy. During the process of fermentation nicotinamide adenine dinucleotide + hydrogen (NADH) is oxidized to its original form of NAD with a plus charge; while other organic molecules such as piruvate are reduced.
True. The embryonic period is the second period of prenatal development and extends from the third week through the eighth week.
<h3>
What is embryonic period?</h3>
Your kid goes through a phase of rapid change after conception known as the embryonic stage. From the fifth through the tenth week of pregnancy, this phase lasts. The infant is referred to as an embryo at this point. The embryonic stage is when a lot of changes take place.
<h3>What happens during embryonic stage?</h3>
The heart starts to beat and the organs develop and start to work during the embryonic period.
<h3>Why is embryonic stage important?</h3>
The brain develops during the embryonic period, which is crucial.
Learn more about embryonic here:
brainly.com/question/15875287
#SPJ4
Answer:
The correct answer is methane . Nature constitutes most of the substances made up of organic compounds. These compounds have carbon atoms attached with hydrogen atoms with a chemical bond (very few compounds may not have this bond).
