What is the definition of a Nucleolus?

Answers

Answer 1
Answer: The  Nucleolus helps function the cell.

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An animal is a vertebrate. It is warm-blooded and has feathers on its body. Which class does it belong to? Reptilia Aves Mammalia

Answers

Answer: Aves


Birds are warm blooded and have feathers

_________________________________________


Mammalia's are warm blooded but have hair that cover the body


Reptilia's are cold blooded and their bodies are usually covered in scales.  


Hopefully this helped and good luck!!!!


Answer:

The answer is Aves.

Explanation:

Hope this helped ya.

< Sarah >

What prevents the Na+ and K+ gradients from dissipating?a.H+-K+ ATPase
b.Na+ and K+ leaks
c.Na+ cotransporter
d.Na+-K+ ATPase

Answers

D. It is an enzyme which is an active form of transport, pumping Na out of the cell while pumping K into the cell against their concentration gradients. This transport maintains the gradient.

Final answer:

The Na+-K+ ATPase, a membrane protein pump, prevents the sodium (Na+) and potassium (K+) gradients from dissipating by actively transporting these ions against their concentration gradients.

Explanation:

The mechanism that prevents the Na+ and K+ gradients from dissipating is the Na+-K+ ATPase. This is an integral membrane protein pump found in almost all animal cell membranes. This pump carries out the function of moving 3 sodium ions out of the cell and 2 potassium ions into the cell during each cycle of pumping. This is done at the expense of one ATP (adenosine triphosphate) molecule, hence the name ATPase. This active transport work against the concentration gradients of these ions, hence maintaining their respective gradients across the cell membrane.

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Complete the sentence.Around1900, European nations built up their military forces, formed alliances, and expanded their colonial holdings in their efforts toA. force their enemies to start wars.
B. maintain a balance of power.
C. put a conscription system in place.
D. end the spirit of militarism.

Answers

B. maintain a balance of power.

The alliances among nations in Europe was established to maintain a balance of power in the region.

The correct answer is option B) Maintain a balance of power.

I just did the exam, good luck guys <3

When determining an isolation area, why should factors like the weather, atmospheric conditions, and the time of the day be considered? a) To minimize the risk of contamination b) To maximize energy efficiency c) To improve communication d) To enhance equipment performance

Answers

Answer:

a) To minimize the risk of contamination

Explanation:

Considering factors like weather, atmospheric conditions, and time of day in the context of isolation areas is crucial to minimize the risk of contamination, especially in situations where hazardous materials or infectious agents are involved. These factors can affect how well the isolation area functions in preventing the spread of contaminants.

How often does the body perform cellular respiration?A.once in the morning and once at night
B.only at night
C.continuously
D.only when the body runs out of ATP

Answers

Ans. (C).continuously.

Cellular respiration can be defined as a metabolic process, which involves breakdown of carbohydrate molecules to produce energy in the form of ATP molecules. These ATP molecules release energy during chemical hydrolysis.

Cells present in body require a continuous supply of energy to preform all of metabolic reactions. Hence, cells perform cellular respiration continuously or constantly.

Thus, the correct answer is option (C).

c. constantly.

hope this helps!

Can the scientific method be used to prove unique historical events?

Answers

Yes, science is used for all of our questions. However, they are just the most thorough educated guesses we have as we are doing the best we can with the tools and evidence we have available.

Final answer:

The scientific method can be used to analyze historical events but cannot prove their uniqueness.

Explanation:

The scientific method can be applied to historical events, but it cannot directly prove their uniqueness. While the scientific method is typically used to study repeatable and observable phenomena, it can still be used to analyze historical events by examining available evidence, conducting research, and drawing logical conclusions. However, due to the limitations of studying past events, the scientific method cannot provide definitive proof of the uniqueness of historical events.

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