The correct answer is a - silicon dioxide.
Diatoms are single celled algae. They have a silica - based cell wall called a frustule, which gives each diatom a particular shape.
Diatoms exist as separate single cells although some may be found in groups or colonies. The ones found in colonies create very pretty forms: leaf shaped, oval , star and even like a period.
Outer shells of diatoms are quite valuable. They are used in industry in the manufacture of toothpaste to give it grit.
The trait that is prominent in Macbeth's character in acts I and II of Macbeth is <span>ambition</span>. The answer to your question is B. I hope this is the answer that you are looking for and it comes to your help.
The electron is.
The electron is the subatomic particle most famous for characteristic behaviors observed in the context of chemical bonding.
Answer: Bio film that grows on the logs and feeds the lake.
<span>Vaccines help develop immunity by imitating an infection. but it does cause the immune system to produce T-lymphocytes and antibodies. Sometimes, after getting a vaccine, the imitation infection can cause minor symptoms, such as fever.</span>
