The answer choice which reduces friction around the lungs as they expand and contract is; Choice C; Pleural fluid.
What reduces friction around the lungs as they expand and contract?A membrane with two layers, termed the pleura surrounds the lungs. A slippery liquid called pleural fluid acts as a lubricant to reduce friction in the space between those two layers, called pleural cavity during breathing.
Remarks:
A. Surfactant
B. Synovial fluid
C. Pleural fluid
D. Mucus
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What is convection?
a type of circular flow
a type of heat cell
a type of heat current
a type of heat transfer
How could we build a microscope with a higher resolution?
The way that we could build a microscope with a higher resolution is; as detailed below
How to create a better Microscope?To achieve the higher resolution in a microscope system, each of the optical components must be of the highest Numerical aperture available.
Another way to achieve a higher resolution is by using a shorter wavelength of light to view the specimen which will increase the resolution.
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Specialised Plant cells are used to absorb water from the soil.
Explain how the structure of these specialised cells are adapted for its function.
(I need this to be slightly unprofessional,so please do not copy off a website,I also need this quick)
Answer:
The Roots have what are known as Root Hair Cells on their surface, these Root Hair Cells increase the Surface Area of the Root allowing a more efficient absorption of Water and Mineral Ions. Found within the cells is a large Vacuole. the role of any Vacuole is to hold the nutrients (mainly salts and sugars) needed for the cell to carry out its multiple functions. So, with this Vacuole being large, it allows more of these nutrients to be held for the Root.
Natural selection results in ______. Group of answer choices a decrease in the size of a population. an increase in the size of a population. increased genetic variation. offspring adapted to their current environment
Answer:
increase in genetic variation
What is the function of lacI in the regulation of the lac operon? It is the operator that mediates the transcription of the structural genes. It is a structural gene that encodes permease. It encodes a repressor that, in the absence of lactose, binds to the lac operator and blocks expression of the structural genes. It is the promoter that mediates the transcription of the operon. It encodes a repressor that, in the presence of lactose, binds to the lac operator and blocks expression of the structural genes.
The function of lacI in the regulation of the lac operon is that it encodes a repressor that, in the absence of lactose, binds to the lac operator and blocks the expression of the structural genes. Thus, the correct option is C.
What is Lac operon?Lac operon may be defined as an operon or a set of genes with a single promoter that encodes genes for the carrier and metabolism of lactose in E. coli and other bacterial species.
The concept of the operon was first proposed by Jacob and Monod in 1961.
The lacI gene product, the lac repressor, is expressed from a separate transcriptional unit upstream from the operator.
When lactose is absent, the lacI gene regulates and produces repressor mRNA which translates repression.
Therefore, it is well described above.
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Match each step of the scientific method with its description.
construct a hypothesis
communicate the results
test the hypothesis
make observations
analyze the results and
make a conclusion
ask questions
Bread, when kept in the open for a
long time, shows the presence of mold.
arrowRight
What causes mold growth on bread?
arrowRight
Changes in temperature may affect
the growth of mold on bread.
arrowRight
Keep the bread in different locations,
changing the temperature at each location.
arrowRight
Increased temperature leads to the
growth of mold.
arrowRight
Make a presentation of the data, and
explain it to the class.
arrowRight
1- C ( this is an assumption; a hypothesis is always based on an assumption.
2- F ( this states to share the results with other classmates).
3- D (this is a description of an experiment you could conduct; you test a hypothesis (usually) by conducting an experiment.
4- A (this is something you could observe during the experiment, therefore it is an observation).
5- E (this sentence is a conclusion).
6- B (This is an actual question)
What is the hypothesis?The hypothesis of most interest to the researcher is the alternative hypothesis.
For example: When we are talking about statistics, the alternative hypothesis is the one that proposes a new model or a new theory, in contrast to an old one, as in the case of the null hypothesis. Oftentimes alternative hypothesis has to be constant with the original research hypothesis in that it stems from previous research and investigation. In simple terms, the alternative hypothesis is in opposition or contrary to the null hypothesis.
Thus, this could be the answer.
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What do felicitated the fusion an active transport have in common
The felicitated the fusion and active transport have in common both transport proteins with energy expenditure.
What do active transport and facilitated diffusion have in common?The Facilitated Diffusion it occurs with the aid of a carrier protein (permease), which binds to the substance and transports it into or out of the cell and Active Transport is expended as it moves against a concentration gradient.
In this case, the two exchange the concentration inside the cell to the outside and transport only proteins with energy expenditure.
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What does the light red layer between the white lumen and blue lamina propria consist of?
The light red layer between the white lumen and blue lamina propria consist of epithelium cells.
What is a lamina propria?
A lamina propria is a type of connective tissue that is present and found under the thin layer of tissues covering a mucous membrane.
Characteristics of the lamina propriaIt is a very large layer of connective tissueIt divides the innermost layer from a layer of smooth muscle tissue.it is a light red layer barrier located between the white lumen and blue lamina.It is made up of epithelium cells.It is also found in the respiratory tract, the Gastrointestinal tract, and the urogenital tract.Thus, the light red layer between the white lumen and blue lamina propria consist of epithelium cells.
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Mention four benefits of rearing the farm animal mentioned in a(i)..-
What is the most appropriate system of keeping the farm animal:....
The four benefits of rearing the farm animal mentioned area the Good pleasant and amount of milk that may be produced and it could upload to the earnings of the farmer.
What types of animal systems are there?According to FAO, there are 3 predominant farm animal control systems: combined manufacturing. in-depth farming systems “landless” enormous manufacturing gadget.
A farming gadget is described as a complicated interrelated matrix of soil, plants , animals, implements, power, labor, capital and different inputs managed in component through farming households and encouraged to various stages through political, economic, institutional and social forces that perform at many levels (Dixon et al., 2001).Benefits of farm animals farming: 1) Good pleasant and amount of milk may be produced and it could upload to the earnings of the farmer. 2) Draught labor animals may be produced and utilized in agricultural work. 3) New range which can be proof against illnesses may be produced through crossing types with the preferred traits.Read more about the farm :
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Which of the following correctly explains the data in the graphs above?
Select one:
O a. The eastern states use much more water for agricultural use because the majority
of use farms and ranches are found there.
Ob. The western states use much more water for agricultural use because the majority
of use farms and ranches are found there.
OC.
The northern states use much more water for agricultural use because the majority
of use farms and ranches are found there.
↑
The correct option to your question is : ( B ) The western states use much more water for agricultural use because the majority of use farms and ranches are found there.
The Agricultural regionThe western states of the united states use much of water for agricultural purposes because most of the farms and ranches are found in the western region of the united states due its temperate weather conditions and fertile soil the west region can be classified as the agricultural region. as well as Texas
Although the graphs related to your question is missing the region that uses much water for agricultural purposes is the western region.
Hence we can conclude that The western states use much more water for agricultural use because the majority of use farms and ranches are found there.
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Which organelle is responsible for giving plants colors other than green?
vacuole
chloroplast
mitochondria
lysosome
DNA is organized into structures called
microtubules
chromosomes
thylakoid stacks
nuclei
Answer:
chloroplast
chromosome
Explanation:
same
Answer:
Correct answer is vacuole.
Explanation:
Vacuoles containe anthocyanin pigment which makes vacuoles to appear in different colour such as red, blue and purple.
DNA is organized into structures called chromosomes.
Chromosome is made up of DNA tightly coiled many times around protein histone.
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Corn is a monocot. According to the table above, does a corn seed have one or two seed leaves?
Answer:
One
Explanation:
Corn are monocotyledon plant...They have only one shoot when they germinate.
what is the purpose of a control
Black eyes are dominant to orange eyes, and green skin is dominant to white skin. A male MendAlien with black eyes and green skin, has a parent with orange eyes and white skin. A female MendAlien with orange eyes and white skin. If these male and female MendAliens were to mate, the predicted phenotypic ratio of their offspring would be _____.
The phenotypic ratio of their offspring would be 1/4 each for black eyes/green skin, black eyes/white skin, orange eyes/green skin, and orange eyes/white skin respectively.
Dihybrid crossingThe male would be heterozygous since he has a parent that is homzygous recessive.
Assuming that eye color is A/a and skin color is B/b.
The genotype of the male would be: AaBb
The genotype of the female would be: aabb
AaBb x aabb
Progeny
A_B_ = Black eyes, green skin = 1/4
aaB_ = orange eyes, green skin = 1/4
A_abb = black eyes, white skin = 1/4
aabb = 1orange eyes, white skin = /4
See the attached image for the Punnet's square analysis.
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The scale below shows the pH levels of various liquids. Which of the following substances is a strong acid?
Answer:
Soda
Explanation:
0 is the most acidic and 14 is the most basic /alkaline
Which of the following represents a polar covalent compound?
H₂O
Cl₂
O2
NaCl
Answer:
NaCl
Explanation:
What is the relationship between velocity and speed
Answer:
Relationship btw Speed and VelocityExplanation:
Speed:
speed can only be positive.
Velocity:
Velocity can be positive, zero and negative in magnitude.
Heat is an example of____energy of matter, and temperature is the measure of this energy.
Internal
Potential
Latent
Kinetic
Heat is an example of Kinetic energy of matter, and temperature is the measure of this energy. So, the correct option is (D).
What is Heat?Thermal energy or heat is a type of energy that comes from the motion of atoms and molecules in a substance. It increases when these particles move faster.
Geothermal energy is the heat energy in the earth while kinetic energy is the energy stored in the motion of objects. Heat energy comes from a substance whose molecules and atoms are vibrating rapidly due to the increase in temperature.
Heat energy is another name for Thermal energy or Kinetic energy which is the energy of an object in motion. Since heat energy comes from moving particles. It is a form of kinetic energy.
Thus, heat is an example of Kinetic energy of matter, and temperature is the measure of this energy. So, the correct option is (D).
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What about Earth allows it to maintain bodies of water?
OA. Weak gravity and high temperatures
OB. Moderate temperatures and strong gravity
C. Strong magnetic fields and lunar tides OD. Comet crashes and mountains
Answer:
Letter C is correct
Explanation:
Earth's moderate temperatures allow water to exist in all three states: solid, liquid, and gas. Its strong gravity keeps the water from escaping into space. Hence option B is correct.
The other options are not correct. Weak gravity would not be able to hold water on Earth, and high temperatures would cause the water to evaporate.
Strong magnetic fields and lunar tides do play a role in shaping Earth's oceans, but they are not the primary factors that allow Earth to maintain bodies of water.
Here are some other factors that help to maintain bodies of water on Earth:
The Earth's atmosphere, which traps heat and prevents the water from freezing.
The Earth's rotation creates the Coriolis force, which helps to distribute the water evenly around the planet.
The Earth's tilt, which causes the seasons, affects the amount of sunlight that reaches different parts of the planet and affects the temperature of the water.
Therefore, option B) Moderate temperatures and strong gravity are correct.
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m
When people share a common resource
without agreement or regulation of its
use,
A. it is likely to become overused
B. it will last forever
C. it will never be overused
D. the possibilities are unknown
What direction
does foul weather normally come from
Answer:
west
Explanation:
What are the molecules that make up the cytoskeleton?
The molecules that make up the cytoskeleton are microtubules, intermediate filaments and microfilaments.
What is the cytoskeleton?The cytoskeleton is a network of proteins inside the cell that provides structural support.
The main proteins of the cytoskeleton are composed of subunits that may be added or removed according to the cell function.
In conclusion, the molecules that make up the cytoskeleton are microtubules, intermediate filaments and microfilaments.
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EASYYYYYYYY
a. Worldwide, what percentage of human water usage does industry account for?
b. What percentage in the US of human water usage does industry account for?
The percentage of human water usage that the industry account for is 19% while the percentage does industry account for in the US for human water usage is = 5%
What is human water usage?Human water usage is the water used by individuals for direct purposes such as bathing, drinking, and cooking.
The percentage of human water usage that the industry account for is 19% while the percentage does industry account for in the US for human water usage is = 5%
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Savannah wraps some gifts and then brings them to the post office where they are delivered to people in different parts of the country. Which organelle is Savannah most like?
Answer: The Golgi body
Explanation: it is most known to label and send packages
Explain the propagation of electrical impulses along a neuron including the role of myelin
Nerve impulses are signals that are transmitted along nerve fibers of the body.
Nerve impulses are electrical impulses. They are generated in response to stimuli.
These electrical impulses create:
action potentials as waves of depolarization that moves along the axons.The axons contain voltage-gated ion channels that are either opened or closed by depolarization (which is the opening of ion channels leading to changes in membrane potential)
Depolarization further causes other channels to open and close thus spreading across the entire length of the axon and into another nerve cell (neuron).
Myelin sheaths act as buffers and through salt conduction help increase the speed of electrical impulses through the neurons. Not every nerve cell is insulated with a myelin sheath.
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Using complete sentences, explain how large-scale agriculture leads to increased atmospheric co2.
Large-scale agriculture will definitely lead to increased atmospheric carbon dioxide. This is due to the attribute that the amount of oxygen released by agricultural plants increases and filters the air that contains toxic gases like carbon monoxide and vamoosing it with CO2.
What is Atmospheric CO2?Atmospheric CO2 may be defined as the amount and quantity of carbon dioxide that is generally present in the atmosphere by the activity of burning fossil fuels, automobile emissions, etc.
It is true that large-scale agricultural activities purify the atmosphere by eliminating all poisonous gases like CO, SO2, etc. This activity is generally performed by the overproduction of carbon dioxide through agricultural plants.
Therefore, it is well described above.
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Weather and natural disasters act independently of a population's density. These factors are called density ____________________ factors.
Answerthese and are called density independent factors
Explanation:
Weather and natural disasters act independently of a population's density. These factors are called density-independent factors.
Density-independent factors are environmental influences that affect populations irrespective of their size or density.
Weather events, such as hurricanes, floods, and droughts, as well as natural disasters like earthquakes and wildfires, can impact populations regardless of their abundance.
These factors can cause significant disruptions to ecosystems, alter resource availability, and influence the survival and reproduction of organisms.
Unlike density-dependent factors, which are influenced by the size of the population and can lead to competition for resources, density-independent factors exert their effects regardless of population size, making them important drivers of ecological dynamics and population fluctuations.
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Describe how the components of the chloroplast are arranged and integrated to
facilitate photosynthesis
The components of the chloroplast are arranged and integrated to facilitate photosynthesis is called chlorophyll.
What is the importance of chlorophyll?
Chlorophyll a absorbs dark blue wavelengths and dark red wavelengths and Chlorophyll b absorbs a light blue wavelength and a red wavelength. Chlorophyll has two main functions the biosynthesis of sugars and the production of oxygen.
Chlorophyll is the pigment responsible for capturing light and ensuring that photosynthetic organisms can produce their food through the process of photosynthesis.
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The stage of the cell cycle during which the cytoplasm divides to form two cells is called:.
Which characteristic of life is being shown by the following image?
O Organisms react to stimuli
O Organisms grow and develop
O Organisms can adapt
O Organisms are made up of cells
O Organisms can use and obtain energy
Answer:
d
Explanation:
organisms are made up of cells
