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ludmilkaskok [199]
2 years ago
13

Describe the ways by which substances can cross the phospholipid bilayer

Biology
1 answer:
kirza4 [7]2 years ago
5 0

Explanation:

Simple Diffusion across the Cell (Plasma) Membrane The structure of the lipid bilayer allows only small, non-polar substances such as oxygen and carbon dioxide to pass through the cell membrane, down their concentration gradient, by simple diffusion.

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The plasma membrane of the sea urchin egg ______. A. is outside of the fertilization membrane B. releases calcium, which initiat
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The plasma membrane of the sea urchin egg has receptor molecules that are specific for binding acrosomal proteins .

<h3>What is plasma membrane ?</h3>

Plasma membrane is the outermost covering of the body which selectively permits the entry and exit of different type of materials .

Thus ,it is also called as selectively permeable membrane.it also separates the inner and outer environment of the cell .

It also helps in the diffusion process .

<h3>What are sea urchins ?</h3>

Sea urchins belongs to the animalia kingdom , Echinodermata Phylum, and Echinoidea class . they are small marine animals .Sea urchins are spiny , globular .

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8 0
2 years ago
Scientific investigations often lead to the formulation of new scientific questions. charle’s darwin reviewed his observations a
Veronika [31]

Can evolution create new species over time through natural selection?

is the question he would be prompted to ask based on his voyage.

<h3>Who was Charles Darwin ?</h3>
  • English scientist Charles Darwin gained notoriety for his theory of natural selection, which postulated that organisms in an ecosystem adapt and evolve in order to maintain their survival.
  • Because of this, Darwin was inspired to consider whether natural selection can eventually result in the emergence of new species after studying the selective breeding of pigeons.
  • Darwin came to the following conclusion based on these straightforward observations:
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3 0
2 years ago
Read 2 more answers
Elemento vital para todas las especies que habitan el planeta
Ivahew [28]
Oxygen , Carbon , hydrogen
4 0
3 years ago
You have left your purse in a shop in a mall. Write a formal letter to the manager to inquire if it has been found. You will hav
Mrac [35]

Answer:

The manager

xyz mall

(area)

(city).

Sir,

Sub-regarding loss of purse

This is to bring to ur notice that I have lost my purse in ur mall.  I left my purse at the shop around 4:00 pm on Saturday 8th November 2020. It was purple in color with A brand logo of GUCCI on it and has a credit card, photo ID, debit card, and some cash.

Kindly look into this and please find my purse. I will be highly obliged.

Thanking you

Yours faithfully,

(ur full name)

(your address)

(your locality)

(your city).

(date).

7 0
2 years ago
Read 2 more answers
Do you believe that all of our actions can be attributed to the nervous system? Does your memory of an event trigger your respon
svet-max [94.6K]

Answer:

The nervous system is made up of all the nerve cells in your body. It is through the nervous system that we communicate with the outside world and, at the same time, many mechanisms inside our body are controlled. The nervous system takes in information through our senses, processes the information and triggers reactions, such as making your muscles move or causing you to feel pain. For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain. Metabolic processes are also controlled by the nervous system.

Explanation:

5 0
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