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kifflom [539]
3 years ago
8

Membranes prevent movement of most substances between the cell and the environment, but most required substances can be moved Ch

oose one: A. through proteins embedded in the membrane that "recognize" specific substrates and allow their passage. B. by ingesting them. C. by simple diffusion. D. by capturing the substances in specialized pockets of the membrane.
Biology
1 answer:
Darina [25.2K]3 years ago
3 0

Answer:

A. through proteins embedded in the membrane that "recognize" specific substrates and allow their passage.

Explanation:

Some of the membrane proteins serve as transport proteins. These transport proteins can serve as channels, carriers or pumps and allow facilitated diffusion or active transport of the substances across the membrane. ion channels are transport proteins that allow specific ions to move across the membrane since the charged ions cannot cross the non-polar core of the membranes. Most of the ions channels are specific and allow only particular ions to move through them. For example, Na+ ion channels will allow only Na+ ions to move across it while the chloride ions would not able to move through it.

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Supply-and-Demand Schedule for Cell Phones Price of Cell Phones Quantity Supplied of Cell Phones Quantity Demanded of Cell Phone
k0ka [10]

Answer:

$150, $200

Explanation:

A schedule that shows relationship between quantity supplied and quantity demanded is used to estimate the equilibrium quantity and price where there is a balance between the buyer's willingness to buy and the seller's willingness to sell.

Below this equilibrium point there is excess of quantity demanded over limited supply.

Above equilibrium there is excess supply and less demand.

According to the given schedule the equilibrium price is $100 where demand and supply are both 300 units.

The prices at which there are excess supply is given below

At $150 400 units is supplied against 250 units demanded

At $200 500 units are supplied against 0 units demanded

5 0
3 years ago
19.
-Dominant- [34]

Answer:

D, they are all the same size.

5 0
3 years ago
Read 2 more answers
A milk snake looks similar to the deadly coral snake. This is an example of A) warning coloration adaptive radiation B) cryptic
Damm [24]
In this case, c) mimicry is the answer. In Batesian mimicry in which harmless animals mimic toxic animals. In this case, I assume the milk snake is harmless and the coral snake is venomous. Since the milk snake has a trait similar to deadly coral snake, less animals would eat it thinking it is dangerous. Over time all the milk snake that look like the deadly coral snake would survive leading to evolution by natural selection. This would lead to more and more milk snake mimicking the resemblance of the deadly coral snake.

a) The deadly coral snake has a warning color adaptive radiation. If the question had described the environment and how the snaked adapted to the environment via warning coloration. This would've been correct.

b) cryptic coloration is more about camouflage with the environment. If the question had state how a certain feature help one of the animals blend into the background. This would've been correct.

d) I'm not sure whats different between this and a so i'll consider them both the same.

3 0
3 years ago
Why is oxygen important for all body cells?
Masja [62]

Answer:

Our body cells require oxygen to release energy.

Explanation:

The oxygen that we take in during respiration is used to break down the food we eat to release energy from it. When we breathe in oxygen, it diffuses into blood from the lung, where it is transported by red blood cells to the entire body to be used to produce energy.

8 0
3 years ago
Which of these viruses is responsible for causing shingles?
vredina [299]

Answer:

Option C, varicella-zoster virus

Explanation:

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It is a DNA virus that belong to the group of  herpesvirus. All herpesviruses have the capability to persists in the body after primary infection as latent infection. These viruses survive for a short duration in the environment.

Hence, option C is correct.

3 0
3 years ago
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