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olchik [2.2K]
3 years ago
7

Which sentence describes the big bang theory?

Biology
1 answer:
kirill [66]3 years ago
6 0

Answer:

D. Because the universe is expanding, scientists conclude that in the distant past, all matter was compressed into a single point.

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There are several disadvantages for asexual reproduction, what would be an advantage
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there is no need to find a mate

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The fins of lobe-finned fish are supported by extensions of the skeleton and are moved by muscles within the fin whereas the fin
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i think the answer is false
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A student is preparing a solution of 0.1 M Tris-Cl (pH 7.0) with 200 mM NaCl. To adjust the pH, the student started with concent
Sophie [7]

Answer:

The correct statements are C The pH is accurate but the solution will have excess salt. D The pH is accurate but the concentration of Tris will be incorrect

Explanation:

As the pH is finally maintained at 7 the pH for the buffer solution will be accurate but excess salt will be produced due to use of Both NaOH and HCl to make up the to 7.

As more volume of water is required at final step to make up the volume the concentration of tris will be incorrect.

7 0
3 years ago
If you were an electron, and your home town was your nucleus, what would you need to do in relation to your home town to emit li
Scilla [17]

Answer:

Option B, Move closer to your home town

Explanation:

The options for the given question are as follows -

A) Knock down your previous house and build a bigger one.

B) Move closer to your home town.

C) Move further away from your home town.

D) Stay where you are but speed up your daily life

Solution -

Electrons carry negative charge while nucleus carries positive charge due to the presence of positively charged proton ions and neutral ions (which has no charge). All the electrons are attracted towards the nucleus due to its positive charge. The orbit on which an electron revolves around a nucleus has higher energy level as compared to the energy levels located in between the space of electron and nucleus.  

While moving from a high energy orbital to a low energy level orbital, an electron releases some energy.  Hence, in order to move closer to home, electron needs to push itself toward the nucleus by releasing energy

Hence, the given option is B

5 0
3 years ago
Name the trophic levels in an ecosystem and explain how energy moves through the trophic levels. Use the food chain and food web
ella [17]

Answer:

there are four trophic levels first are producers then primary  consumers then secondary consumers then teritary consumers

Explanation:

grass - grasshopper - frog - snake - eagle is a simple food chain

4 0
2 years ago
Read 2 more answers
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