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professor190 [17]
3 years ago
7

cell membranes are made of phospholipids which form a hydrophobic barrier. How does water pass through the cell membrane?​

Biology
1 answer:
Alla [95]3 years ago
8 0
Water is a small molecule that easily diffuses through a cell membrane despite the lipid tails. The diffusion of water is what we call “osmosis”. Oxygen is a small molecule and it is also nonpolar, so it easily passes through a cell membrane.

It is able to pass through because of the high osmotic pressure difference between the inside and outside of the cell.

Most of the water passes through channels called “aquaporins”.
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During which part of pregnancy does the fetus begin to blink its eyes and become more active
Nikolay [14]

The answer is In the last trimester of pregnancy. While the senses of the fetus start to develop in the 8th week, the different sense mature at different stages. Vision is the last sense to mature. After the 26th week, after the eyelids of the fetus have fully developed, the fetus begins to blink (even experience REM while involves rapid eyelid movements ).






6 0
3 years ago
In most cases, the two major climatic factors affecting the distribution of organisms in terrestrial ecosystems are __________.
sesenic [268]

Answer:

precipitation and temperature

Explanation:

Temperature and water are considered major abiotic factors that affect species distribution in terrestrial ecosystems. The temperature can affect the distribution of terrestrial organisms due to many species maintain a constant internal temperature, while other species maintain a body temperature range that may be very different from the environmental temperature, and therefore they will not be able to carry out their metabolic functions. Hibernation is an adaptation that allows some terrestrial animals to escape temperature fluctuations. Moreover, water is another limiting factor for life, since water is critical for cellular processes. The waxy cuticle is an adaptation that allows terrestrial plants to avoid excessive water loss through transpiration.

4 0
3 years ago
What are the advantages and disadvantages to sunscreens containing common active ingredients such as oxybenzone, octocrylene, an
aleksklad [387]

Sunscreens contain chemical ingredients in their compositions, such as avobenzone, oxybenzone, octocrylene, homosalate, octisalate and octinoxate, which have been linked to health problems such as hormonal disruptions, cancer, as well as liver and kidney changes.

<h3>What is oxybenzone, octocrylene, and homosalate bad for?</h3>

Oxybenzone, octocrylene, and homosalateto protect from UVA also penetrates deep into the skin. The penetration  into the human body can cause several problems in human health such as

  • allergic reactions
  • cell mutation
  • deregulation of hormonal processes,
  • etc.

With this information, we can conclude that Oxybenzone, octocrylene, and homosalateto is considered a hazardous eye irritant and, as an allergen, is also known to cause skin allergies.

Learn more about Sunscreens in brainly.com/question/20448560

#SPJ

6 0
2 years ago
Need help pls you know what Ima give 24 points dmb answers will be reported
Trava [24]

Answer:

I would limit almost anything on the mountains.

Along with that, build very sturdy walls to assist prevention from them hitting the city, of course have the "moved land" to a different location.

4 0
3 years ago
Flower color in snapdragons is an example of incomplete dominance. When a red-flowered plant is crossed with a white-flowered pl
Ira Lisetskai [31]

Answer:

25% red flowered

25% white flowered

50% pink flowered

Explanation:

Let the red flower color be represented by RR, the white color by rr.

When RR was crossed with rr, the offspring had pink flowers;

RR   x   rr = Rr, Rr, Rr, Rr (Pink color)

Crossing Rr with another Rr

Rr   x   Rr  = RR, Rr, Rr, rr

RR = red

Rr = pink

rr = white

<em>Hence, if a pink flowered plant is crossed with another pink flowered plant, 25% of their offspring will be red, 25% will be white and 50% will be pink.</em>

4 0
3 years ago
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