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Dennis_Churaev [7]
4 years ago
9

Which statement correctly describes the nucleus of the atom?

Biology
2 answers:
RideAnS [48]4 years ago
7 0
Answer: D
Explanation: I just got it right
lidiya [134]4 years ago
5 0

Answer:

D. the nucleus contains the protons and neutrons which takes up most of the mass of the atom

Explanation:

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Arya observes that the grass behind her house is dry. She believes the water content in the soil is about two-thirds lower than
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So, there's five steps to the scientific method:  Identifying the problem, forming a hypothesis, doing research and collecting background data, conducting the experiment, and finally coming to a conclusion.  Arya already completed step one and two, because she sees a problem (the dry soil), and then comes up with a hypothesis, which is the water content in the soil in her yard is 2/3 lower due to the slope of her yard.  Next, she's going to have to go and collect her data!  This may include taking soil samples from her own yard and her other neighbors yard, and then measuring the slope of their yards ect. Then, she's going to take this information and put it into the experiment stage, and then she will come to her final conclusion!
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3 years ago
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1. An animal cell has a 2% salt concentration. It is placed into a solution with a 0.05% salt concentration. What would happen t
jenyasd209 [6]

Answer: water will move out of the animal cell causing it to swell and burst  (Option C)


Explanation:


When a cell is immersed into a salty solution, the osmotic pressure generated by concentration differences of salt, will make the salt come in due to cell self-protection mechanism of the cell and water will come out, eventually the cell can burst .But since the animal cells has a higher concentration of salt and the solution has a lower concentration osmosis will take place and salt will move from higher salt concentration to lower.



3 0
3 years ago
Which of the following statements is NOT true regarding ATP production in muscles during periods of prolonged energy use, such a
Marysya12 [62]

Answer:

C.In the absence of oxygen, creatine phosphate can drive aerobic respiration pathways for a few minutes.

Explanation:

C. In the absence of oxygen, creatine phosphate can drive aerobic respiration pathways for a few minutes.

This statement  not true for a following reasons.

Firstly,  creatine phosphate directly phosphorylates ATP instead of providing any support for aerobic pathways.

Secondly, creatine phosphate stores are used up in about 15 seconds only. Thirdly, a cell does not need  oxygen deficit for creatine phosphate to be activated, it just needs to be short on ATP.

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Compare and contrast: How are hypothesis and theories related?
sergiy2304 [10]
Hypothesis are guesses based on scientific knowledge. Theories are systems of ideas intended to explain something. 
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