Which characteristic makes a cell membrane selectively permeable? the smooth outside of the membrane the chemical nature of the membrane the rigid nature of the membrane the thickness of the membrane

Answers

Answer 1
Answer:

Answer:

chemical nature of the membrane

Explanation:

The cell membrane is bilayer of amphipathic phospholipids and proteins The hydrophobic tails of phospholipids make the inner core of the membrane while hydrophilic heads are oriented towards the surface of the membrane.  

The membrane is selectively permeable as it allows only nonpolar, small and uncharged substances to pass through its hydrophobic inner core. Hence, the chemical nature of the membrane makes it choose the allowed substances to be transported.


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Need help ASAP!The number of organisms in a food pyramid decrease as the trophic level
A) decreases.
B) increases.
C) stays constant.
D) changes unpredictably.

Answers

b is you're answer. I did this before
The correct answer is b) increases
A trophic level is where the organism is in position it occupies from the food chain. Meaning that it eats but is also eaten.

So the more animals eaten in the food chain it decreases case of the unstable rate of each animal preying on each other. more animals being eaten= higher trophic level 

+ im in usatestprep c:

50 POINTS PLZ QUESTION ABOUT HURRICANE FLORENCE Where did the storm cause the greatest shoreline erosion? (Think east or west of the hurricanes path) explain your answer using what you know about the rotation of the hurricane.

Answers

It was west in Florence It was like the biggest dangerous hurricane that is why here in the united states has been dark these couple of days and still is. the rotation has gone west but the hurricane is not to dangerous right now because all the rain drops had to be low because there was already too much rain in the west and rotated to the south but more in the west.

What is a community that has reached a stable stage of ecological succession called

Answers

Pioneer species is the proper term for a community that has reached a stable stage of ecological succession

Answer:

Climax community

Explanation:

3. Which BEST compares compounds and mixtures? A Compounds and mixtures contain a variety of elements, but the elements in a mixture do not retain their original characteristics when combined.

 B Compounds and mixtures contain a variety of elements, but the elements in a mixture are able to last longer because they are chemically combined.

 C Mixtures can be made up of elements and compounds that lack definite proportions, but a compound is composed of elements that are present in definite proportions.

Answers

Answer:

The statement that BEST compares compounds and mixtures is option C:

Explanation:

"C Mixtures can be made up of elements and compounds that lack definite proportions, but a compound is composed of elements that are present in definite proportions."

Answer:

 A Compounds and mixtures contain a variety of elements, but the elements in a mixture do not retain their original characteristics when combined.

Explanation:

As Compounds consist of two or more atoms that can be broken down into simple elements.

A Mixture contains two or more atoms that can be mixed together. Those atoms are not chemically combined.

What might happen to an organism if it's habitat could not meet one of its needs

Answers

It might migrate to another nourishing habitat or if stays it might just perish...
Depends on what needs... If it was the food, weathering, etc. many factors play a role in this. For example if it were a drought and the organism could not live without a constant supply of water,then it would die?

What might happen to the sea star population after oyster beds are destroyed

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Sea stars (or starfish) feed off the oyster beds. If the oyster beds were destroyed it would deplete the major food source of the sea stars and they would begin to diminish.