Why is the cell membrane considered selectively permeable? Because some materials can come in and some materials must stay out Because some materials can come in and some materials must stay out Because it forms a barrier where all materials can get through Because it forms a barrier where all materials can get through Because it forms a barrier where no materials can get through Because it forms a barrier where no materials can get through
Answer:
Because some materials can come in and some materials must stay out
Explanation:
Cell membrane is a structure that covers or bounds the cytoplasmic layer of every living cell. It is made up of mostly lipids. According to this question, it is regarded as selectively permeable. This means that it selects what goes into the cell and what comes out.
The cell membrane is capable of this because of its amphipathic nature i.e contains both hydrophilic and hydrophobic regions. Because the cell membrane controls what goes into the cell and what comes out of the cell, it is referred to as selectively permeable as some materials can come in and some materials must stay out.
What do you think makes a skin cell different from a hair cell?
Answer:
Hair grows by forming new cells at the base of the root. These cells multiply to form a rod of tissue in the skin. The rods of cells move upward through the skin as new cells form beneath them. As they move up, they're cut off from their supply of nourishment and start to form a hard protein called keratin.
Explanation:
Skin cells are designed to be shed and replaced quickly, and they lack mitochondria (which helps to generate energy).
What is a cell?Cells are the foundational building blocks of all life. Many of cells make up the human body.
They support the body's structure, absorb nutrients from food, convert those nutrients into energy, and perform specialized functions.
Hair grew back by establishing new cells at the root's base. These cells divide and multiply to form a tissue rod in the skin.
As new cells form beneath them in that case, the cell rods starts moving upward through the skin. As they progress, they are cut off from their food supply and begin to form keratin, a hard protein.
Thus, this way, it can be concluded that, hair cells are different from skin cells.
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How does the water in the wet foam affect its density?
Answer:
increases its density due to increased mass
Explanation:
Paano naaapektuhan ng bawat katangian ang isat isa?
Answer:
naaapektuhan ang bawaf katangian ng isat isa dahil sa maaaring ito ay nakakaapekto ng sobra
Explanation:
sana makatulong
Plants have developed many methods of seed dispersal. The table below shows seeds of two different plants. How has the seed dispersal method developed by these plants given them a reproductive advantage?
Answer:
it gives them an advantage by it being able to spread out its kind many different times and in vast amounts.
Explanation:
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If Guanine makes up 24% of a DNA sample is the percentage of Adenine?
A. 24%
B. 48%
C. 26%
D. 52%
Answer:
20% plus 20% is 40% of adennine and thymine. From 100% DNA bases subtract 40% and you will get 60%. Then divide this by 2 and you will get 30%. 30% of guanine and 30% of cytosine, because their amounts are equal in the DNA stand.
Explanation:
sorry if that didnt help but i certainly hope that it did!!!
but im pretty sure that its 48%
help me!!!
Scientists claim that viruses are not living. Which evidence supports the classification of viruses as nonliving?
Viruses are unable to change or evolve over time.
Viruses must use their host’s cellular machinery in order to reproduce.
Viruses cause many different types of diseases.
Viruses lack genetic material that can be passed to future generations.
Answer:
Viruses must use their host’s cellular machinery in order to reproduce
Explanation:
The evidence that viruses use their host’s cellular machinery in order to reproduce put viruses in non living category. Thus option B is correct.
What are viruses?Viruses are microscopic infectious agents that contain genetic material, either DNA or RNA, and must invade a host in order to multiply.
Living things reproduce. Cells generally reproduce by replicating their DNA. Unlike cells, viruses do not have the tools to replicate their DNA.
But they have found other ways to create new viruses. This is done by introducing viral genetic material into the host cell.
Many scientists claim that although viruses can use other cells to reproduce, viruses are still not considered alive under this category. This is because the virus does not have the tools to replicate its genetic material on its own.
Therefore, scientists consider virus as non living because they do not have their own machinery to replicate their genetic material. Thus. option B is correct
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Which of the following is NOT an ecological argument for why wolves should be reintroduced into the woods of northern Pennsylvania?
a) Wolves will keep deer populations in check.
b) Wolves provide animal kills which are food for a variety of animals
c) Plant communities are more diverse when wolves are present.
d) Wolves will strengthen the ecotourism business ask tourist visit to see wolves.
In which type of environment are plants most likely to use a C4 pathway of carbon fixation?
cold and wet
cold and dry
hot and wet
hot and dry
Answer:
I would try the third one
someone help please question is in pic
Answer:
the top and bottom one
Explanation:
animals breathe in oxygen and plants make oxygen
some animals eats plants and other animals eat animals( who eat plants) therefore indirectly benefiting from plants along with directly
animals don need chlorophyll
plants "breathe" in corbon dioxide not animals
What is an example of grow and develop?
Answer: example of development is a caterpillar transforming into a chrysalis (in the cocoon) and then into a butterfly.
Explanation:
Answer:
an example of growth is a little caterpillar growing into a big caterpillar, an example of development is a caterpillar transforming into a chrysalis (in the cocoon) and then into a butterfly.
Explanation:
Can you hear radio waves
Answer:
yes, you can hear most radio waves
Explanation:
Answer:
You cannot hear radio waves but you could see them. Since radio waves are transmitted along with light waves you can´t hear them, but since it is part of a light spectrum you are able to see them.
Which of the following statements about the tundra is not true?
a.
The tundra has limited vegetation.
b.
There are two main categories of the tundra biome.
c.
Temperatures in the tundra can get below -20° F.
d.
The tundra biome does not support animal life.
It's actually D on edge2020. Tundra has limited veg, the two types are alpine and artic, and temperatures can get below -20F. Tundra can support animal life, but it's just extremely harsh and unforgiving.
The statement that is not true about the tundra is the tundra biome doesn't support animal life. So, the correct option is D.
What is Tundra?Tundra biome is found at high latitudes, where sunlight is low. The soil in this region is completely frozen and nutrients are limiting. The average temperature of this region is below -10°F. The vegetation consists of low shrubs and grasses.
As the nutrients are limited in the tundra biome, it has limited vegetation. There are two main categories of the tundra biome i.e. Arctic tundra and Alpine tundra. Animals such as the arctic hare, the arctic fox, the musk ox, the polar bear, etc. are present in the tundra habitat.
Therefore, the statement that is not true about the tundra is the tundra biome doesn't support animal life.
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In some flowers, pollen falls on the stigma of the ____ flower and _____-pollination occurs.
Answer:
in some flowers, pollen falls on the stigma of the same flower and self pollination occurs.
In the diagram below, which part of the human brain handles processes such
as thinking, hearing, and movement?
B
O
A. Both B and C
B. B only
C. Both A and C
OO
D. A only
Answer:
There is no diagram below
Explanation:
What is the Thalweg?
Answer:
a line connecting the lowest points of successive cross-sections along the course of a valley or river.
Explanation:
Answer:
a line connecting the lowest points of successive cross-sections along the course of a valley or river.
Explanation:
What item is closest to 1 meter?
a school bus
A a human
a space ship
a bug
I NEED ANSWER BY TONIGHT!!! (10 POINTS!!!!!!!!)
What is NOT an advantage of asexual reproduction?
1. requires less energy
2. requires only 1 parent
3. quick process
4. variation of genetic traits
Answer:
uhh if its asexual reproduction then 4. isnt true. there are no variations since its just basically the cell splitting.
Explanation:
I need help please...
1. Does respiration occur in (a)lungs, (b)heart, (c)trachea (d)lungs (e)arteries, or (f)veins? Explain your answer.
Answer:
(a) lungs
Explanation:
The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.
In this water molecule, how many electrons does each hydrogen atom share with oxygen?
A) two
B) one
C) four
D) eight
Answer:
Four
Explanation:
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19. How does a unicellular paramecium get rid of its excess water? Is
energy used?
Answer:
Paramecium and amoeba live in fresh water. Their cytoplasm contains a greater concentration of solutes than their surroundings and so they absorb water by osmosis. The excess water is collected into a contractile vacuole which swells and finally expels water through an opening in the cell membrane.
Explanation:
How do water's relative densities as a solid and liquid differ from that of most other substances
Answer:
Under normal ambient conditions water is less dense as a solid than as a liquid, so ice floats on water. Most materials are more dense as solids.
What is the ultimate energy for all life on Earth?
Answer:
Explanation:
There are many energy needed to survive, the basics are the sun, and oxygen
You freeze an enzyme and then warm it gently without passing the optimum temperature. What will happen to its activity
A. The activity will speed up then decrease to zero
B. The activity will speed up
C. Activity will not be affected at all
D. There will be no activity
Answer:
B. The activity will speed up
Explanation:
As temperature increases, enzyme activity increases (until is passes the optimum temperature)
The tree branch is made of wood and the block is also made of wood Why does the tree branch with leaves complete the circuit but the old wood block does not? the tree branch was longer so it completed the circuit
Answer: The tree branch probably fit the circuit because it was larger in size tahn the brick. The brick would be much smaller. So, this is why the tree fit the circuit.
Hope this helps!
MODEL MUST INCLUDE:
Ice Pack
Skin
• particles for the ice
pack
particles for the skin.
• how the particles are
moving in each
system based on
their temperatures.
and
Plastic border between
ice pack and skin
How kinetic energy
is entering or leaving
the systems
What are all the ways that organisms can interact in a community
Answer:
The fact that organisms live together forces them to interact in different ways. For example, an organism preys upon another for food. Or perhaps there is competition among organisms over resources such as food, water, and territory.
Explanation:
What effect does waste water treatment have on land
Answer:
The discharge of effluent from wastewater treatment plants (WWTPs) has major detrimental effects on the health of aquatic ecosystems. WWTP outfall can deposit large amounts of organic matter and nutrients into receiving waterways. Increased nutrient loading can lead to eutrophication (20) and temporary oxygen deficits (35)
Will an object with a large mass require more or less force to be stopped?
Why?
Answer:
Yes
Explanation:
Heavier objects (objects with more mass) are more difficult to move and stop. Heavier objects (greater mass) resist change more than lighter objects. Example: Pushing a bicycle or a Cadillac, or stopping them once moving. The more massive the object (more inertia) the harder it is to start or stop.
A bacteria called E. Coli is found in different kinds of foods, including beef. Thoroughly cooking beef can help prevent infections caused by E. Coli. Which conclusion is best supported by this information? E. Coli is a harmful bacteria that can be killed by exposure to oxygen. E. Coli is a helpful bacteria that can be killed by exposure to oxygen. E. Coli is a harmful bacteria that can be killed by high temperatures. E. Coli is a helpful bacteria that can be killed by high temperatures.
Answer:
The correct answer is: E. Coli is a harmful bacteria that can be killed by high temperatures.
Explanation:
E.coli or Escherichia coli is a gram-negative bacteria that are normally harmless but there are many strains that cause harm to individuals including humans. These bacteria come in contact with organisms through contaminated food or water and cause diarrhea and other illnesses inside and outside of the intestine.
These bacteria can be killed by the high temperature as they are not able to live at a high temperature that is the reason high temperature is used to decontaminate the water or places that are at high risk of exposure to the bacteria.
Answer:
the correct answer is E. coli is a harmful bacteria that can be killed by high temperatures. Or C
Explanation:
hope it helps! ($ $)
c