Choose all the answers that apply. Which of the following minerals can be scratched with a fingernail? -talc
-diamond
-topaz
-quartz

Answers

Answer 1
Answer:

The minerals can be scratched with a fingernail. Thus, option A is correct.

What is minerals?

Minerals has been defined as a substance which has natural such as coal, oil, salt which has been especially one that has been found just in the ground and some of the mineral has been also found in the food as well as drink and they are very necessary for the betterment of the health.  The main feature of sedimentary rock has that they are formed in the multiple layers. Minerals has been defined as a substance which has natural such as coal, oil, salt.

The main feature of sedimentary rock has that they are formed in the multiple layers of the particles that are organic or the minerals at the surface of Earth, later followed by the process of cementation. The main feature of sedimentary rock has that they are formed in the multiple layers.The rocks are made up of more than one mineral and the size of some rocks are small or big it depends upon their constituents.

Therefore, The minerals can be scratched with a fingernail. Thus, option A is correct.

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Answer 2
Answer: - Talc (the softest mineral on Earth)


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What is a limitation of using a chemical formula, such as C6H12O6, to represent a compound?
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Which statement best explains how each of the different cell types can develop from the same embryo

Describe an example of the cognitive stage, the associative stage, and the autonomous stage during learning the task of operating your new video camera.

Answers

I don't understand this but can u please help me with history

Why must cells reproduce?

HELP PLZZ :((

Answers

Answer: Cell division is key to life: from the moment we are first conceived, we are continually changing and growing. In order for our bodies to grow and develop, they must produce new cells—and allow for the death of old cells. Cell division is also an essential component of injury repair.

Explanation: have a good day

Cells must reproduce to provide protection for your body.

Hope this helps; have a great day!

?Which is the order of organisms from the shortest life cycle to the longest?firefly → moss → pea plant
moss → pea plant → firefly
firefly → pea plant → moss
pea plant → firefly → moss

Answers

Answer:

The correct answer is firefly → pea plant → moss.

Explanation:

Fireflies average life span is about 2 months for adults. Pea plants are annual plants and life span is of one year, it takes place from winter to the end of summer.

Moss life span is longer than pea plants and fireflies. Their life span depends on their species which can range from two to ten years. Generally, it considered as 10 years.

Thus, the correct answer is firefly → pea plant → moss.

Answer:

c. Firefly, peaplant, moss.

Explanation:

Fireflies live for only a couple weeks. Pea plants live for about 100 days. Moss lives for about 4 months.

Which of the following has been mentioned by historians as a cause of World War I?A. nationalism in the Balkans
B. militarism of African nations
C. fighting between India and Pakistan
D. an unprovoked attack on the U.S.

Answers

"Nationalism in the Balkans" is the one among the following choices given in the question that has been mentioned by historians as a cause of World War I. The correct option among all the options that are given in the question is the first option or option "A". I hope the answer has come to your help.

Answer:

Option A, nationalism in the Balkans

Explanation:

Eastern Europe cluster of nations lying between the Austro-Hungarian and Ottoman empires was known as Balkans. Due to its strategic location, all the Europeans powers focused on Balkans’ event. Also,  the Balkans were  politically active as they had both national ethnicity and tension with in its national territories.  

In 1912, several Balkan nations  became part of military alliances as influenced by the Russians which later on led to the  formation of the Balkan League. This Balkan league waged several wars against the Ottomans in order to remove them from eastern Europe. After fighting for eight months, Balkan won this battle but they were disrupted and thus Serbian nationalist groups and led to World War I

Hence, option A is correct

The scientific name for a cougar is Puma concolor. What other organisms might be closely related to the cougar?

Answers

Panthers are closely related to puma

Answer:

Yes, that is the scientific name for a cougar! Tiger, lions, and jaguars are also closely related to the cougar.

Explanation:

Pls mark me brainliest <3

What is the structure formed by wrapping of DNA around the histone core?

Answers

The structure formed by wrapping DNA around a histone core is called a nucleosome.

What is a nucleosome?

A section of DNA wrapped around core histoneproteins is termed a nucleosome. The protein and DNA complex inside the nucleus is called chromatin. This is a thread-like structure due to the formation of which DNA is condensed into a small volume.

The structure of chromatin appears to be like 'beads on a string under a microscope. The beads are the nucleosomes. The nucleosomes are small structures with a diameter of approximately 11 nm. Also, nucleosomes are known to be the fundamental subunits of chromatin.

In each nucleosome, a set of eight histone proteins are present. There are about two turns of DNA in each nucleosome around eight histone proteins. These histone proteins are known as histoneoctamer. There are two sets of each histone protein namely, H2A, H2B, H3, and H4.

Therefore, the structure formed by wrapping DNA around a histone core is called a nucleosome.

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The answer is a nucleosome