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Andreyy89
3 years ago
7

Many insects have a tough outer shell called _____. an exoskeleton cellulose an endoskeleton chitin

Biology
1 answer:
Hitman42 [59]3 years ago
6 0
Many insects have a tough outer shell called an exoskeleton..
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The Persians began a system of managing government that is called a _____
g100num [7]

Answer:

The Persians began a system of managing government that is called a <u>absolute monarchy </u>

Explanation:

The had a absolute monarchy government with a decentralized administration and  local autonomy

5 0
3 years ago
You should dedicate _______ of your dinner plate to protein-rich foods.
Mrrafil [7]
The ideal serving of protein rich food in a day is up to 2-3 servings or <span> c. 1/3 of your dinner plate. </span>Protein can be found in eggs, poultry, fish, beans, peas, lentils and nuts. The other 2/3 of your plate should include carbs and fruits and vegetables.
3 0
2 years ago
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How long after the formation of Earth did the first life appear?
djyliett [7]

Answer:

4.54 billon years

Explanation:

the earliest time that life forms first appeared on Earth is at least 3.77 billion years ago possibly as early as 4.28 billion years

6 0
2 years ago
Make a decision about the molecule NaHCO3 classification organic or inorganic
motikmotik

<u>Answer:</u>

NaHCO_{3} is an inorganic compound.

<u>Solution:</u>

  1. Firstly, all the known definitions of organic compounds excludes Carbonic acid and it's salt from organic compounds except if 'C' is present in the cation.  
  2. Secondly, Sodium is a metal which organic compounds cannot posses as a compound.  
  3. Lastly, there is absence of C-H bond which is present in all the organic compounds.

Hence, we can conclude that NaHCO_{3}is an inorganic compound though there is presence of Carbon atom in it.

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2 years ago
As electrons are passed through the electron transport chain associated with photosynthesis, they lose energy. what happens to t
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C. it establish and maintain a proton gradient
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