BIOLOGY MIDDLE SCHOOL

Label the cell:
a
B
C
D
E
F
G
H
Label the cell: a B C D E F G - 1

Answers

Answer 1
Answer: A nucleus
B mitochondrion
C cytoplasm
D rough ER
E cell membrane
F vacuole
G smooth ER
H Golgi apparatus

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How does the endomembrane system work together with the ribosomes? A. takes proteins out of the cell B. provides a protective covering C. helps to make food D. obtains energy for the cell
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PLZ HELP!!! I'm timed. I need answer as soon as possible. Will mark the brainliest if correct and ad a thanks with a rate of 5 too. thank you :) .Which definition best describes global warming?

a long-term change in the Earth's climate
a long-term increase in the Earth's average temperature
a long-term change in the climate of a region or a city
solar heat that is radiated out into space

Answers

Answer:

I think it's the 2nd one
B would be the correct answer and here is why

A is incorrect because climate is the weather conditions prevailing in an area in general or over a long period. Which means it only affects one area meaning that it is not “Global” so this also eliminates C.
D is incorrect because that is not talking about Earth

Plz mark as brainliest I took the time to explain why B is correct and also ensured you that it is correct through these explanations

A solution at pH 7 contains how many times more hydrogen than a solution at a pH of 10?

Answers

Answer:

Solution of pH 7 contains thousand times more hydrogen than the solution of pH 10.

Explanation:

pH of A substance is given by the negative of the logarithm of concentration of hydrogen ions. It is given by the equation

pH=-log \ [H^+ ]

Here the initial pH is given as 7. We have to calculate the concentration of H^+ ions.

7=- log[H^+ ]  [H^+ ]=10^-^7

The final solution has a pH 10. We have to calculate the concentration of H^+  in this case

pH=-log[H^+ ] 10=-log [H^+ ][H^+ ]=10^-^1^0

Next we have to calculate how many times more is the H^+ ion concentration in the solution of pH 7 when compared to the solution with pH 10.

\frac {10^-^7}{10^-^1^0} =10^3=1000

Thus the concentration of H^+ ion in the solution of pH 7 is 1000 times more than the solution of pH 10.

Final answer:

A solution at pH 7 contains 1000 times more hydrogen ions than a solution at a pH of 10. This is due to the logarithmic nature of the pH scale where each unit difference equals a tenfold difference in hydrogen ion concentration.

Explanation:

The pH value of a solution is the negative logarithm base 10 of the concentration of Hydrogen ions in the solution. The difference in pH from 7 to 10 implies a ten-fold difference for each unit of pH, thus, a difference of three pH units indicates a difference of 103, or 1000 times in hydrogen ion concentration. Therefore, a solution at pH 7 contains 1000 times more hydrogen ions than a solution at a pH of 10.

As a side note, it is important to remember that a lower pH value indicates a higher acidity (more hydrogen ions) and a higher pH value indicates a lower acidity (fewer hydrogen ions).

Learn more about pH Scale here:

brainly.com/question/1433865

#SPJ11

How does the cell theory describe the levels of organization of living organisms ??? Help plezz and I will be thank to u so much

Answers

It took over 200 years for the "cell theory" to be formalized and accepted. Hooke and Leeuwenhoek were early microscopist's.... but at the time the nature of matter, the belief in spontaneous generation, and the idea there were little worlds within little worlds ad infinitinum was popular. The discovery of the periodic table and establishment that atoms were real, the demolishing of spontaneous generation, all happened at the time that Schwann and Schleiden (and others) were working with better microscopes, better ideas about the material world, and better observations...... thus the cell theory.

does Sexual reproduction relies on meiosis instead of mitosis because only meiosis produces diploid sex cells.

Answers

Yes, meiosis is strictly dealing with your gonads which are your gametes (testes/ovaries). It would not produce a diploid sex cell but rather 4 totally genetically different haploid cells. It can best be seen as 2n becomes n. In mitosis you can have 1n to 1n or 2n to 2n because in mitosis you have 2 identical daughter cells exactly like the parent cell.

What do plants release during cellular respiration? A. carbon dioxide and oxygen B. water and sugar C. carbon dioxide and water D. oxygen and sugar

Answers

Answer:

D. Oxygen and sugar

Explanation:

The answer is

Oxygen and sugar

Explanation

I may be wrong, but in respiration, it releases oxygen and glucose which  is the same as sugar.

Which diagram best illustrates the relationship between the number of cells, tissues, and organs in a complex multicellular organisms

Answers

if it has more than one cell like the humin body it is a multiceller and it can bulid up to tissues or musscle to organs to organ systems
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