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erma4kov [3.2K]
3 years ago
14

PLEASE HELP QUICK!! WILL MARK BRAINLIEST ANSWER!! When water is diffused across a selectively permeable membrane, scientists ref

er to that as cellular respiration diffusion active transport osmosis
During diffusion, when the concentration of molecules on both sides of the membrane is the same, the molecules will

continue to move across the membrane in both directions.
move across the membrane to the outside of the cell.
move across the membrane to the inside of the cell.
stop moving across the membrane.
Why does mitosis need to occur?

Question 3 options:


It is where all organisms reproduce and repair tissues by creating new cells with half of the DNA that was found in the parent cell.


It allows single-celled organisms to reproduce, and other organisms to repair damaged tissues and grow.


It allows single-celled organisms to reproduce and for other organisms to obtain the extra chromosomes needed for growth.


It is where multi-celled organisms reproduce by creating new cells with twice the DNA that was found in the parent cell.


Which statement best describes the relationship between the cytoplasm and the nucleus?
Question 4 options:


The nucleus is an organelle that is surrounded by the cytoplasm, a jelly-like fluid.


The cytoplasm is an organelle that is usually found next to the nucleus.


The nucleus is a jelly-like fluid, and it mixes with the cytoplasm, that is a fluid much like the nucleus.


The cytoplasm is a jelly-like fluid that fills the nucleus

Which statement best describes the relationship between the cytoplasm and the nucleus?
Question 4 options:


The nucleus is an organelle that is surrounded by the cytoplasm, a jelly-like fluid.


The cytoplasm is an organelle that is usually found next to the nucleus.


The nucleus is a jelly-like fluid, and it mixes with the cytoplasm, that is a fluid much like the nucleus.


The cytoplasm is a jelly-like fluid that fills the nucleus
Chemistry
1 answer:
xxTIMURxx [149]3 years ago
7 0

Answer :

During diffusion, when the concentration of the molecules on both sides of the membrane is the same, the molecules will continue to move across the membrane in both the direction.

Answer 3 : It allows single-celled organism to reproduce, and other organism to repair damage tissues and grow.

Answer 4: The nucleus is an organelle that is surrounded by the cytoplasm, a jelly-like fluid.

Explanation :

Diffusion : It is a process where liquid moves from higher concentration to the lower concentration through permeable membrane.

When the concentration of the molecules on both sides of the membrane is same and the membrane is permeable membrane then diffusion will occur and the molecules will moves continuously across the membrane in both the direction.

Answer 3 :

Mitosis : It is a process of cell division. In this process, nucleus divides into two daughter cell and each daughter cell contains same number of chromosomes as present in parent nucleus.

The main purpose of the mitosis is to repair damaged tissues and growth.

Answer 4 :

Nucleus is a type of cell organelle. It is present in both animal and plant cells and it is the brain of the cell. It is present only in eukaryotic cell.

Nucleus is an organelle which is surrounded by the cell membrane which protects its from the other cells.

Cytoplasm is a jelly-like fluid which is present in the cell membrane which is made up of salt and water.


 

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What molecules can be broken down to one Another ?
hjlf

Answer:

compounds can be broken down to one another

4 0
3 years ago
A wooden block has a length of 4.0 cm, a width of 2.0 cm, and a height of 1.0 cm. What is the volume of this block?
MakcuM [25]
Use the formula for volume. V = lwh. Plug in the numbers for length, width, and height. Now we have V = 4.0 x 2.0 x 1.0, which is 8.0. So the volume of the block is 8.0 cm.

Thanks for your question! Don't forget to rate and give me the brainliest answer! Then, I can help you with all your problems! ^-^ ~
8 0
3 years ago
Acetaldehyde shows two UV bands, one with a lmax of 289 nm ( 5 12) and one with a lmax of 182 nm ( 5 10,000). Which is the n p*
UkoKoshka [18]

Answer:

The bands are due to:

λmax = 289 nm n→π* transition (E = 12)

λmax = 182 nm π→π* transition (E=10000)

Explanation:

The two types of acetaldehyde transition are as follows:

n→π* and π→π*

From the attached diagram we have to:

ΔEn→π* < ΔEπ→π*

ΔEα(1/λ)

Thus:

λn→π* > λπ→π*

In n→π* spin forbidden, the intensity is low. Thus, the molar extinction E for n→π* is very low.

The same way, for π→π* spin allowed the intensity is high. Thus, the molar extinction coefficient E for π→π* is high too.

The bands are due to:

λmax = 289 nm n→π* transition (E = 12)

λmax = 182 nm π→π* transition (E=10000)

5 0
3 years ago
How many moles of tungsten atoms are in 4.8 x10^25?
vekshin1

Answer:

79.7 mol.

Explanation:

  • It is known that every 1.0 mole of compound or element contains Avogadro's number (6.022 x 10²³) of molecules or atoms.

<u><em>Using cross multiplication:</em></u>

1.0 mole of tungsten contains → 6.022 x 10²³ atoms.

??? mole of tungsten contains → 4.8 x 10²⁵ atoms.

∴ The no. of moles of tungsten contains (4.8 x 10²⁵ atoms) = (1.0 mol)(4.8 x 10²⁵ atoms)/(6.022 x 10²³ atoms) = 79.7 mol.

4 0
4 years ago
(a) Find the concentration of electrons and holes in a sample of germanium that has a concentration of donor atoms equal to 1015
matrenka [14]

Answer:

a) Germanium = 5.76 x 〖10〗^11 〖cm〗^(-3) , Semiconductor is n-type.

b) Silicon = 2.25 x 〖10〗^5 〖cm〗^(-3) , Semiconductor is n-type.

For clear view of the answers: Please refer to calculation 5 in the attachments section.

Explanation:

So, in order to find out the concentration of holes and electrons in a sample of germanium and silicon which have the concentration of donor atoms equals to 〖10〗^15 〖cm〗^(-3). We first need to find out the intrinsic carrier concentration of silicon and germanium at room temperature (T= 300K).

Here is the formula to calculate intrinsic carrier concentration: For calculation please refer to calculation 1:

So, till now we have calculated the intrinsic carrier concentration for germanium and silicon. Now, in this question we have been given donor concentration (N_d) (N subscript d), but if donor concentration is much greater than the intrinsic concentration then we can write: Please refer to calculation 2.

So, now we have got the concentration of electrons in both germanium and silicon. Now, we have to find out the concentration of holes in germanium and silicon (p_o).  (p subscript o)

Equation to find out hole concentration: Please refer to calculation 3. and Calculation 4. in the attachment section.

Good Luck Everyone! Hope you will understand.  

6 0
3 years ago
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