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3 years ago

To see if the pearls are shiny because

Biology

1 answer:

Volgvan3 years ago

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Dengue fever is an infectious disease of humans that is caused by a virus. There are four main viral strains, and an individual

Yuri [45]

Answer:

Explanation:

Suppose the four different strains are P, Q, R, S. Thus, the first infection can be from any of the four strains and it occurs in 4 ways.

Since an individual cannot be infected again with the strain from which he/she is been previously infected;

Then, at the second time;

The possible number of strain to be infected with = 4-1 = 3 ways

Thus; the number of possible different levels of severity can be viewed by forming two lettered word P, Q, R, and S without repetition which is:

= 4 × 3

= 12

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3 years ago

4. What does the tree of life represent? (1 point)

antiseptic1488 [7]

<span>A. the current hypothesis of the evolutionary relationships between organisms.</span>

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3 years ago

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A chronic cough, blood-tinged sputum, and dyspnea are symptoms of which cancer?

timurjin [86]

Answer:

lung cancer. i hope this helps

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3 years ago

The largest level of biological study is the

Aleksandr-060686 [28]

<span>It is the biosphere, which includes all living organisms and ecosystems is the highest physical level of biological study.</span>

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3 years ago

Categorize the given minerals into metallic and non-metallic minerals?

tangare [24]

Iron, Gold, Aluminum, Sapphires and Copper are the metallic minerals while Quartz, Calcite, Diamond, Rubies, Emerald, Topaz, Coal and Petroleum are the non-metallic minerals.

<h3>What are minerals?</h3>

Mineral is a chemical compound which is normally crystalline in nature. It is a solid substance present in nature made up of one or more and elements which are combined together.

It is formed as a result of geological processes . For example it includes quartz, calcite, sulphur, clay minerals etc. Minerals are used in the production of ceramics oftenly.

Properties of minerals :

1. They have characteristic chemical composition

2. They have highly ordered atomic structures

3. They have several physical properties such as hardness, luster and cleavage.

Thus, Iron, Gold, Aluminum, Sapphires and Copper are the metallic minerals while Quartz, Calcite, Diamond, Rubies, Emerald, Topaz, Coal and Petroleum are the non-metallic minerals.

Learn more about Minerals, here:

brainly.com/question/18078524

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1 year ago