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pentagon [3]
3 years ago
6

Is plasma membrane a selectively permeable membrane give two points of difference between diffusion and osmosis

Biology
2 answers:
katovenus [111]3 years ago
7 0

Answer:

Yes, the plasma membrane is a selectively permeable membrane. Two differences are that...

1. Osmosis involves water.

2. Diffusion involves air molecules.

Anni [7]3 years ago
5 0

Answer: Yes, plasma membrane is a selectively permeable membrane.

Differences between osmosis and diffusion are: osmosis occurs only through a selectively permeable membrane while diffusion does not involve a selectively permeable membrane.

Osmosis involves only the movement of water molecules while diffusion involves the movement of solute particles.

Explanation:

Plasma membrane is a selectively permeable membrane because all biological membranes are composed of phospholipids bilayer which allows the passage of specific substances through it.

Osmosis is the movement of water molecules from an area of high water concentration (or low solute concentration) to an area of low water concentration (or high solute concentration) through a selectively permeable membrane.

Diffusion is the movement of solute particles from a region of high concentration to a region of low concentration.

For osmosis to occur, it must occur through a selectively permeable membrane. Diffusion can occur in the absence or presence of a selectively permeable membrane.

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At 20°C the enzyme that catalyzes the breakdown of polysaccharides functions at 1 reaction every 20 microseconds. If this enzyme
lora16 [44]

Answer:

Seven segments

Explanation:

As given in the question -  

After every  twenty microseconds one reaction occurs i.e breakdown of polysaccharides.  

This means that after every  twenty microseconds the polysaccharides is broken down  

The total time for this hydrolysis reaction is  120 micro seconds

Thus , there will be six phases of division each after every  twenty microseconds

After 1st  twenty microseconds , total segments is equal to two

After 2nd  twenty microseconds , total segments is equal to three

After 3rd  twenty microseconds , total segments is equal to four

After 4th twenty  microseconds , total segments is equal to five

After 5th twenty  microseconds , total segments is equal to six

After 6th twenty microseconds , total segments is equal to seven

4 0
3 years ago
The image shows rock strata from three different regions on Earth. Identify all the layers that contain an index fossil
FrozenT [24]

The correct answer is: Layer 1, layer 2, and layer 4 in all three regions.

The index fossils are fossils that are commonly used for identifying a geological period of time, and these fossils are also very wide spread, as well as having a rapid evolutionary trends.

By this picture, we can easily see that even though we have rock strata from different regions, the same layers contain the same fossil, and it is a fossil that also is rapidly evolving so has a minor change in each layer.

7 0
3 years ago
What causes the "heat island" effect?
laila [671]

Answer: The answer is D mate

Explanation:

3 0
2 years ago
1. A single-celled organism that lacks a membrane-bound nucleus,
earnstyle [38]

Answer:

The answer is (A). Prokaryote

3 0
2 years ago
Cladograms (a type of phylogenetic tree) constructed from evidence from molecular systematics are based on similarities in
defon

Answer:

The correct answer is "mutations to homologous genes".

Explanation:

The missing options of this question are:

A) morphology.

B) the pattern of embryological development.

C) biochemical pathways.

D) habitat and lifestyle choices.

E) mutations to homologous genes.

The correct answer is option E) "mutations to homologous genes".

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5 0
3 years ago
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