Please help me with my biology hw-

1.) The basic unit from which cell membranes are constructed is

a- cell walls
b-free moving proteins
c- phospholipid layer

2.) Four glucose molecules are found in a cell and ten are found outside the cell. At equilibrium, how many glucose molecules would be found in a cell, assuming the glucose molecules can cross the cell membrane?

a- 4
b- 7
c- 10

3.) The movement of water in or out of a cell is called:

a- diffusion
b- osmosis
c- facilitated diffusion

4.) If a red blood cell is placed in pure, fresh water, the cell will:

a- stay the same
b- burst
c- become darker

5.) Which of the following would occur if a cell with 1% dissolved salt solutes is placed in a 10% salt solution?

a- the cell would swell
b- water would leave the cell
c- the cell would burst

Answers

Answer 1
1-c, 2-b, 3-b, 4-b, 5-b
Answer 2

The basic unit from which cell membranes of the cell are constructed are phospholipid layers. Phospholipid bilayer is found to be present in the cell. Thus, the correct options for 1, 2, 3, 4, and 5 are C, B, B, B, and B, respectively.

What is Cell membrane?

The cell membrane is also known as the plasma membrane. It is found in all the different types of cells and it is responsible for separating the interior of the cell from the outside environment in which the cells are present. The cell membrane consists of a phospholipid bilayer which is semipermeable in nature. The cell membrane regulates transport of materials from entering and exiting the cell.

Equilibrium is a state which marks the balance of substances inside and out of the cell. In this condition, there are total 14 molecules of glucose (4 inside + 10 outside) therefore, to achieve a balanced state there must be 7 molecules of glucose inside as well as outside the cell.

The movement of water inside or outside of a cell is called Osmosis.

If a red blood cell is placed in a pure, fresh water, the cell will burst. This is due to osmosis as the concentration of water is less inside the cell as compared to outside environment. Water moves inside the cell which leads to bursting of the cell.

If a cell with 1% dissolved salt solutes is placed in a 10% salt solution then the water would leave the cell because of the concentration gradient of the water.

Therefore, the correct options for 1, 2, 3, 4, and 5 are C, B, B, B, and B, respectively.

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Related Questions

A continental rift is also called a

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The are also called Continental Plates, or Continental Drifts.

During photosynthesis, ________ energy is converted into __________ energy within the chloroplasts.

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Answer:

Solar;usable chemical

Explanation:

a cow eating grass is an example of A) herbivory B) predation C) habitat destruction D) a keystone species

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A.) herbivore is the answer


A) herbivory
Animals who eat plants are herbivores and consumers

amylase increased the rate at which starch is broken down in to glucose. what kind of molecule is amylase

Answers

amylase is an enzyme

Answer:

Enzyme

Explanation:

Enzyme is a biomolecule that increases the rate of something. Because Amylase increases the rate at which starch is broken down into glucose, Amylase is considered a Enzyme.

which best describes an idea that has scientific consensus

Answers

Most, but not necessarily all, scientists agree with an idea.

A scientific consensus refers to an idea that is widely accepted by the majority of scientists in a field, based on substantial empirical evidence and rigorous scrutiny. Examples include the theory of evolution and climate change.

An idea that has scientific consensus could best be described as a concept, theory, or hypothesis that is generally agreed upon by the majority of scientists in that particular field. This consensus indicates that the idea is backed by substantial empirical evidence and has undergone rigorous scientific scrutiny. For instance, the theory of evolution and the concept of climate change bear scientific consensus. They are widely accepted by scientists worldwide because they are consistently supported by a vast body of evidence.

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Winning Science Fair Ideas. College.

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Explain how quantum physics is useful for time travel

Which of the following best describes the long-term impact of using a nonrenewable energy source?

Answers


Biomass is a renewable source of energy. I'd say coal mining can pollute water supplies and kill fish and aquatic plants.

Hello. This question is incomplete. The complete question is:

"Which of the following best describes the long-term impact of using a nonrenewable energy source?

A: Geothermal energy can disrupt the water table and harm water supplies.  B: Nuclear power damages the atmosphere by producing air pollution.  C: Burning biomass to produce energy releases greenhouse gases.  D: Coal mining can pollute water supplies and kill fish and aquatic plants."

Answer:

D: Coal mining can pollute water supplies and kill fish and aquatic plants.

Explanation:

The use of non-renewable energy has proven to be a strong pollutant of ecosystems and biomes. Coal mining is an example of how the use of non-renewable energy degrades nature.

The environmental impacts of mining are diverse and varying in scale: from specific local problems to major biological, geomorphological, water and atmospheric changes. Therefore, knowing these problems and minimizing their effects is of great necessity to ensure the preservation of natural environments.

Coal mining can pollute the water supply and kill fish and aquatic plants. Not to mention the degradation of soil and vegetation that this activity promotes.

in electrolysis, electrons move between two metal strips called

Answers

Electrodes, the positive side is called the Cathode and the Negative side is called the Anode.The anode and cathode. The anode is positively charged and the cathode is negative

"The coded information that the cell uses to synthesize many different proteins is stored in structure
(1)A
(2)B
(3)C
(4)D
"

Answers

I think it should be B

Which experiments led to changes to the original cell theory ?

Answers

Answer:

The experiments that show all cells are similar in the how they metabolize and in their composition.

Explanation:

The cell theory states that ;

1. All living things are made up of cells.

2. Cell is the smallest, functional and structural unit of life.

3. All cells come from preexisting cells through process of cell division.

The experiments that show all cells similar in how they metabolize and in their changed has led to changes in the original cell theory states above.

Construct a scientific explanation based on evidence for how environmental and genetic factors influence the growth of organisms. Make sure to address environmental AND genetic factors and how they change based on different environments and different genes. At least five sentences. Use specific examples. Use complete sentences.

Answers

Environmental and genetic factors can influence the growth of many organisms on earth such as plants, animals, and even fish. When the climate changes, many animals/organisms adapt by adaptation and evolution. Every organism can evolve in order to stay alive in this race of competition for survival. This is a natural accordance that happens every day in our world. Thus making organisms stay alive for longer periods of time.

Please mark the other guy brainliest I feel bad lol--

A volcanic eruption takes place in a location. Ash and gas are sent out into the air. Lava flows down the volcano into human habitation. Which Earth systems interact during this process? a.)  geosphere, atmosphere, and biosphere B.) hydrosphere, geosphere, and biosphere C.) atmosphere, geosphere, and cryosphere D.) biosphere, cryosphere, and hydrosphere

Answers

A volcanic eruption takes place in a location. Ash and gas are sent out into the air. Lava flows down the volcano into human habitation. Which Earth systems interact during this process?



B.) hydrosphere, geosphere, and biosphere

The major Earth systems which interact during volcanic eruptions are Hydrosphere, geosphere, and biosphere. Volcanoes are the events in geosphere. Thus, the correct option is B.

What is Volcanic eruption?

A volcanic eruption is when lava and gas are released from a volcano explosively. The most dangerous type of eruption is called a 'glowing avalanche' which is released when a freshly erupted magma flows down the sides of a volcano.

A volcanic eruption can cause glaciers and icecaps to melt. The hot lava is released from the geosphere. The sulfuric acid erupted from the volcanoes combines with rain in the hydrosphere which makes the acid rain. When this acid rain reaches the surface of the Earth, it pulls minerals from the soil, which deprives valuable nutrients from the soil and increases the acidity of the water and affects the animals that live in it. This affects the hydrosphere and biosphere.

Therefore, the correct option is B.

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Which reactant in the photosynthesis equation is the source of hydrogen for sugar molecules?

Answers

The answer to this question is water

The answer for the question is water

What organelle gives plants the structure they need to stand up tall.

Answers

the answer is the cell wall

The cell wall is an organelle that gives plants the structure they need to stand up tall.

What does it mean to say that science is a systematic process

Answers

It means that you have to do a series of steps.

Answer:

Science is a systematic process, which means it follows a careful method that involves observation and experimentation. Through experimentation, information is collected that supports or refutes a scientist’s hypothesis.

in a controlled enviroment the varible that is change is called

Answers

The independent variable is the one variable you manipulate in the experiment

The dependent variable (or responding variable) changes as a result of the independent variable  
A controlled environment is kinda similar to a controlled experiment of sort

The surface area/volume ratio is an important factor for one-celled organisms. As a cell's volume grows, its surface area/volume ratio __________, making it ______________ to acquire enough nutrients via diffusion.

Answers


The two words that go in the blanks I would guess they are looking for are "decreases" and "difficult".

Correct answer: Decreases, Difficult

As the cell continues to grow, its internal volume increases and its membrane expands. At a certain time, there is a situation when the volume of a cell increases more as compared to the surface area. As a result of that the surface area volume of cell decreases. As the surface area to volume ration decrease, the cell becomes larger.

Hence, as the cell continues to grow beyond a limit, all the material are not able to cross the membrane rapidly so that it maintains the increased cellular volume. It results to disturb the normal function of a cell.






Which of these is a pure substance . dimond . salt . ocean water a. a and b. b and c

Answers

i think salt is it                                            
........................

what parts of the atmosphere interact?

Answers

the blanket of gasses surrounding the planet

During radioactive decay, atoms of a radioactive element break down and change into other atoms of another element-all at once



True or False.

PLEASE HELP ME. I will give BRAINLIEST answer

Answers

This is true I looked up in the science dictionary.

Which has more energy for erosion?


rainfall


lake


slow-moving creek


fast-moving stream

Answers

D is the answer
hope it helped!
Slow moving creek cause the water keeps rushing on the same point for an extended period of time rather then fast moving which just rushed by them

The kind of biome that develops in an area is determined by temperature and

Answers

Salutations!

The kind of biome that develops in an area is determined by temperature and --

The kind of biome that develops in an area is determined by temperature and precipitation. These are the abiotic factors that help determine the environment of the biome. They tell whether a biome is humid, dry freezy or hot. 

Hope I helped (:

Have a great day!

Organisms use sugars, also called Blank Space __________, for energy.

carbohydrates


lipids


proteins


nucleic acids

Answers

Nucleic acids I think so

the answer is A. carbohydrates

what can a ecosystem survive without with

Answers

Final answer:

Ecosystems require components like sunlight, producers, consumers, and decomposers to function effectively. These components deliver crucial ecosystem services necessary for the survival of all living things, including humans.

Explanation:

For an ecosystem to live longer and thrive, certain elements are essential. These include sunlight or chemical compounds to provide energy, the presence of producers like plants and photosynthetic organisms to harness that energy, and consumers like animals that feed on these producers.

Decomposers such as bacteria and fungi are crucial as they recycle nutrients back into the ecosystem, ensuring that soils remain fertile and productive. Without these key components, and the multitude of services they provide, human life would struggle to exist as ecosystems purify our air and water, stabilize the climate, and support all aspects of biodiversity.

Ecosystem services are the goods and the support systems that sustain human life. This includes production of oxygen, decomposition of waste, regulation of climate, and the creation of soils necessary for agriculture. It is clear that without healthy ecosystems, survival of living things, including humans, would be compromised, as ecosystems are the cornerstone that upholds the intricate web of life on Earth.

The solar wind is a stream of electrically charged particles flowing at high speeds from the sun
TRUE/FALSE

Answers

True because the solar wind is high speed flowing in the air

Answer: TRUE

Explanation:

A solar wind can be define as the stream of charged particles that develop in the upper layers of the atmosphere. These charged particles are of high speed being released from the sun. The particles present in the solar wind are electrons, alpha particles and protons. These solar winds vary in temperature, density and speed over time and over solar longitude and latitude. The aggregate of solar winds are called as corona.

which area of the United States has the least risk of earthquakes?

a.eastern
b. central
c.western
d.southern

Answers

Which area of the United States has the least risk of earthquakes?

a.eastern

Kohlberg believed people shift back and forth between the six schemas in his three levels of moral reasoning, depending on the circumstance and the person's current level of cognitive development.

true or false

Answers

The statement above is FALSE.
The theory of moral development which was developed by Kohlberg stated that morality start from the early childhood and can be affected by many factors. He proposed six stages of moral development which are divided into three levels. His work shows that moral reasoning is the basis for ethical behavior.

Answer:

False

Explanation:

What type of rock is formed from compaction or cementation?

Answers

Sedimentary rocks are formed by cementation and compaction. This happens when sediment particles are compressed and fused together over very long periods of time. 

The type of rock that is formed from compaction or cementation is sedimentary rock, which is formed from the accumulation and compression of sediment and the accumulation of sand, mud, etc.

What is the significance of the cementation and sedimentary rocks?

Generally, these are formed from the accumulation and compression of sediment, while in the cementation process, mineral crystals, such as calcite or silica, precipitate and fill the spaces between sediment particles; this can happen in the presence of water and form the rock like soil. This sedimentary rock is helpful for fossil record studies.

Hence, the type of rock that is formed from compaction or cementation is sedimentary rock, which is formed from the accumulation and compression of sediment and the accumulation of sand, mud, etc.

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Which of these is an inorganic nutrient
A. carbohydrate
B. vitamin D
C. pasta
D. water

Answers

VITAMIN D, do you know why, it contains such as dietary minerals, water, and oxygen may also be considered nutrients.
Which of these is an inorganic nutrient ? 


Answer: D. water

ᴱˣᵖˡᵃⁱⁿⁱⁿᵍ: ᶜᵃʳᵇᵒʰʸᵈʳᵃᵗᵉˢ, ˡⁱᵖⁱᵈˢ, ᵖʳᵒᵗᵉⁱⁿˢ ᵃⁿᵈ ᵛⁱᵗᵃᵐⁱⁿˢ ʰᵃᵛᵉ ᶜᵃʳᵇᵒⁿ ⁱⁿ ᵗʰᵉⁱʳ ˢᵗʳᵘᶜᵗᵘʳᵉ, ᵐᵃᵏⁱⁿᵍ ᵗʰᵉᵐ ᵒʳᵍᵃⁿⁱᶜ. ʷᵃᵗᵉʳ ᵈᵒ ⁿᵒᵗ, ˢᵒ ʷᵃᵗᵉʳ ⁱˢ ⁱⁿᵒʳᵍᵃⁿⁱᶜ. ᴬˡˡ ᵛⁱᵗᵃᵐⁱⁿˢ ᵃʳᵉ ᵒʳᵍᵃⁿⁱᶜ. ᴵⁿᵒʳᵍᵃⁿⁱᶜ ʷᵒᵘˡᵈ ᵇᵉ ᵐⁱⁿᵉʳᵃˡˢ ᵃⁿᵈ ᵒᶠ ᶜᵒᵘʳˢᵉ ʷᵃᵗᵉʳ.

Good luck and have a nice BenevolentPuppy day!. If I'm wrong, let me know.

Distinguish between an organisms habitat and its niche using the prairie dog as an example

Answers

Final answer:

An organism's habitat is its physical environment, like the grasslands for prairie dogs, while an organism's niche is its specific role within the ecosystem. Prairie dogs' niche includes burrowing and serving as prey, which is critical for many other species' survival, making them a keystone species. Without prairie dogs, the ecosystem might face collapse.

Explanation:

An organism's habitat is its physical environment. For prairie dogs, this would be the grasslands or prairies where they live. In contrast, an organism's niche refers to its specific role within the ecosystem. Prairie dogs, as a species, have a niche that includes their extensive burrowing activities and their role as a primary food source for predators.

Prairie dogs are a keystone species because their burrows provide critical shelter for many small animals and their existence as prey supports numerous predators. By creating and maintaining burrow systems, they also help to aerate the soil, which benefits plant growth, and their foraging behavior can influence the distribution of plant species.

Without prairie dogs, their ecosystem could potentially collapse due to the loss of these critical functions. For example, the burrows they dig offer protection and habitats for other species, which contributes to the overall biodiversity of the ecosystem. If prairie dogs were to disappear, the ripple effects would be profound, impacting both predators and other small animals reliant on the burrows for shelter.

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