Answer:
The natural level of ozone in the stratosphere is a result of a balance between sunlight that creates ozone and chemical reactions that destroy it.
Explanation:
Answer:
C, to test for the presence of carbonate minerals in a rock
Explanation:
I did this a few weeks ago on Edge. Hydrochloric acid isn't for rock washing, they wouldn't use it to wear away rocks since it'd ruin the sample I think, and you will go blind if you put it in your eyes
Answer:
rons swords are made of iron and so they oxidize (a fancy word for rust), the process entails the metal absorbing oxygen from the air to create a new compound (rust).
Explanation:
The answer is the vacuole
A monomer of DNA is composed of nitrogenous base, a pentose sugar and a phosphate group.
<h3>What is the composition of DNA?</h3>
- A DNA molecule is made up of several repeating units called nucleotides.
- Each nucleotide is made up of 3 parts: base, sugar and phosphate.
- Nitrogen bases are cyclic carbon compounds and are of two types: Purines (Adenine and Guanine) and Pyrimidines (Cytosine and Thymidine).
- Purines bond with pyrimidines to form double helix of DNA.
- The sugar has pentose structure and is deoxyribose as it lacks 2’- OH group.
- The 1’ Carbon of sugar is attached to the 9’ nitrogen of purine or 1’ nitrogen of pyrimidine by glycosidic bond.
- The 5’ carbon of sugar is attached to phosphate group.
- The phosphate group is pentavalent with a double bonded oxygen and three single bond hydroxyl molecules.
Learn about genetic material here:
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