Answer:
B i hope this help
Explanation:
The cell membrane consists primarily of a thin layer of phospholipids which spontaneously arrange so that the hydrophobic "tail" regions are shielded from the surrounding polar fluid, causing the more hydrophilic "head" regions to associate with the cytosolic and extracellular faces of the resulting bilayer. This forms a continuous, spherical lipid bilayer approximately 7 nm thick, barely discernible with a transmission electron microscope.
The arrangement of hydrophilic and hydrophobic heads of the lipid bilayer prevent polar solutes (e.g. amino acids, nucleic acids, carbohydrates, proteins, and ions) from diffusing across the membrane, but generally allows for the passive diffusion of hydrophobic molecules. This affords the cell the ability to control the movement of these substances via transmembrane protein complexes such as pores and gates.
Phospholipids are particularly suited to serving as membranes because they create a selectively impermeable membrane, as option B shows.
Why are phospholipids able to create impermeable membranes?Due to its composition with fatty acids.Because of its hydrophobic tail.Phospholipids are molecules formed by fatty acids and alcohol. Fatty acids form the tail of these molecules and it is a hydrophobic structure that does not allow mixing with aqueous substances.
These tails are able to form a semipermeable structure that is very useful to maintain the selectivity of biological membranes, and controlling the entry and exit of elements.
All this can be seen in option B.
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the body of tapeworm is segmented but it doesnot belong to phylum annelidai why
Answer:
look
Explanation:
Flatworms, roundworms, and segmented worms are all invertebrates. Some species of each type of worm are free-living, meaning they are not dependent on another organism.Some are parasitic.
Flatworms belong to phylum Platyhelminthes. They do not have a coelom, respiratory system or a circulatory system.Tapeworms flukes are examples of flatworms.
Roundworms are part of the phylum Nematoda. They are bilaterally symmetrical invertebrates.They have a psuedocoelom. Ascaris lumbricodes is the most common human parasite.
Segmented worms are the most complex animals of these three invertebrates. They are placed in Annelida. Segmented worms have a true coelom, a circulatory system and a digestive system.An earthworm is a segmented worm.
Although tapeworms have segmented bodies, they do not belong to the phylum Annelida due to key biological differences. The segments in tapeworms are reproductive and not involved in locomotion or digestion, unlike in Annelids, and their nervous systems are structurally different.
Explanation:The body of a tapeworm is indeed segmented, but it does not belong to the phylum Annelida because there are key differences in their biological make-up. Annelids, such as earthworms, have bodies made up of similarly structured segments with a central nervous system. Moreover, these segments have the potential to function independently.
On the contrary, tapeworms, which belong to the phylum Platyhelminthes, while they have segmented bodies, their segments don't have an independent functional capacity. In tapeworms, these 'proglottids' are reproductive in nature and not involved in locomotion or digestion like the segments in Annelids. Additionally, their nervous systems are structurally different from that of the Annelida.
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In science, all ideas are not tested with evidence from the natural world
True
False
Answer:
false
Explanation:
Answer:
False
Explanation:
reason
not all studies are proven or tested to be true
Which of the following identifies the structural hierarchy that makes up the pulmonary system in order of increasing complexity?
A pulmonary system, lung tissue, lung, lung cell
B lung cell, lung tissue, lung, pulmonary system
C pulmonary system, lung tissue, lung cell, lung
D lung tissue, lung, lung cell, pulmonary system
Answer:
B, lung cell, lung tissue, lung, pulmonary system
Explanation:
Lung cells are also called as pleural cells. Lung cells to form lung tissue which then forms the lung and lung and its function forms the pulmonary system. The complexity increases from cell to organ system.
Pulmonary system plays a major role in respiration. Lung cells once damaged are slow to regenerate. Alveoli are the sacs in the lungs that take up the oxygen from the inspirited air and then transfers it to the tissue.
Answer:
B
Explanation:
Cells that have differentiated to perform a specific function make up a tissue, tissues of a specific function make up an organ, and organs that coordinate to perform one or more functions make up an organ system. Another organ system is the digestive system made up of organs such as the esophagus, ileum, and stomach. The organs are made up of many tissues types like the muscle tissue that is made of smooth muscle cells.
The atomic number of carbon is six, which means that a carbon atom has six protons Carbon has three naturally occurring isotopes carbon-12,
carbon-13, and carbon-14. Which of these statements are true about carbon and its isotopes? Select all that apply
A
All carbon atoms have six neutrons.
B. All carbon atoms have six protons and six electrons.
C
Atoms of all carbon isotopes have either more than 6 electrons or fewer than 6 electrons.
D. Atoms of some naturally occurring carbon isotopes may have six neutrons.
E
Atoms of some naturally occurring carbon isotopes may have twelve neutrons.
Answer:
B & D
Explanation:
What differs between the isotopes of an element is the mass number (which is the number indicated after the name of the element e.g carbon-14). The mass number is the sum of neutrons and protons in the nucleus of the atom. The proton number of an element does not change without changing the element. Usually the proton number is equal to the electron number in a neutral atom of an element. However, the neutron number of an element does change (in most cases) within a slight range giving rise to different isotopes of the element.
Therefore in our case, Carbon-14 has 6 protons and 8 neutrons & Carbon-12 has 6 neutrons and 6 protons.
Answer:
B and D are your answers.
The number of electrons is the same as the number of protons and carbon has 6 protons for answer choice B.
For answer choice D because of the occuring isotopes there are as many nuetrons as protons.
Have a good Day! :)
Animal cells contain all of the following structures EXCEPT a
Answer: (Cell wall) I am sure
Explanation:
Which of the following explains the relationship between genes and chromosomes?
A. Chromosomes come in different versions called genes.
B. Genes come in different versions called chromosomes.
C. Chromosomes are structures that are made up of two versions of
multiple genes.
D. Genes are structures that are made up of multiple chromosomes.
Answer:
genes are contained in chromosomes - C
Explanation:
The relationship between genes and chromosomes is that chromosomes are structures that are made up of two versions of multiple genes. Thus, the correct option is C.
What are genes and chromosomes?Deoxyribonucleic acid (DNA) is the genetic material. It is a nucleic acid and it is smaller than a gene. The DNA molecule is made up of two long chemical chains called as nucleotides which twist around one another in a double helical structure.
Genes are the segments of deoxyribonucleic acid (DNA) which contain the code for a specific protein that functions in one or more types of cells in the body. Chromosomes are the structures within cells which contain a person's genes. Genes are contained in the chromosomes in nucleus of the eukaryotic cell.
Therefore, the correct option is C.
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Do all birds have feathers?
Yes, all birds have feathers. About 9,700 kinds of birds live on earth. All birds have feathers and wings but not all birds can fly. Birds have as many as 25,000 feathers and they shed their feathers at least once a year.
100points PLEASE HELP ASAP - In 2012, the total ecological footprint Of China Was only just below that of The European union. But the ecological Footprint of the European Was nearly 3 times greater then that of the Chinese. explain how this is possible
Answer:
the Ecological Footprint measures the amount of biologically productive land and sea area an individual, a region, all of humanity, or a human activity that compete for biologically productive space.
Obsidian is formed when rapidly cooling ions are randomly distributed creating a ______. texture
a. glassy
b. fine-grained
c. course-grained
d. porphyritic
Obsidian is formed when rapidly cooling ions are randomly distributed creating a a. glassy texture.
Explanation:Obsidian is a type of mineraloid, which is formed when liquid content of the volcanic material cools so quickly that particle lacks ability to transform into a crystalline structure. The outcome is a volcanic glass with a smooth uniform surface that breaks with a conchoidal crack.
As a “glass”, obsidian is artificially shaky. With the progression of time, some obsidian starts to solidify. This procedure doesn't occur at a uniform rate all through the stone. Rather it starts at different areas inside the stone. In these areas, the crystallization procedure structures spiral groups of white or dim cristobalite gems inside the obsidian. Whenever cut and cleaned, these examples are alluded to as “snowflake obsidian”.
Bones,blood,and muscles are made up of cells. True or False?
Answer:
This statement would be true. All of these are made of and include many cells.
Answer:
True
Explanation:
Cells are the basic building blocks of life. They make up all life forms.
I am joyous to assist you anytime.
what is in a chloroplasts that provides the green color
Answer: Pigment chlorophyll
Explanation: Chloroplasts are green because they contain a green pigment called chlorophyll in their thylakoid membranes.
How are dominant and recessive alleles alike and different ?
Explanation:
Their genes determine the traits plus characteristics. Genes determine their eye shade, hair shade, and skin tone. Unlike the other alleles, they are withdrawn and are also much less possible to be expressed in many different ways. A dominant allele is also forced to be paired up with another recessive allele. Which also means that the most dominant and strongest allele is going to determine the characteristics by one hundred percent to one hundred percent.
I hope this helps you.
According to Arroyo, the second thing we need to prepare for is heat and droughts. What are some ways in which people are better preparing to handle these effects of climate change?
Answer:
Firstly is planting drought-resistant strains of food crops to feed the population living in these dry regions. Second is adopting measures that conserve and protect water sources. Other include;Altruistic use of water in homes, farms, and industries Using alternative energy fuels that reduce green should emission into the atmosphere
Answer:
Helping farmers build hillsides terraces and find out ways to conserve water, but also providing for insurance when droughts do come. This gives stability and gives the farmers the confidence to invest. It’s giving them access to affordable credit. It’s allowing them to become more productive so that they can afford their own insurance over time, without assistance.
Explanation:
Which part of a feedback mechanism receives messages from several
sensors, compares actual conditions to set points, and determines whether
there are differences from set points?
OA) effector
OB) stimulus
OC) response
OD) integrating center
Answer:
D. Integrating Center
Explanation:
To maintain homeostasis in the body, the body needs to keep track of the condition within and respond to any fluctuations. Also known as the control center, the integrating center activates the effector when it sees that values of the internal condition of the body deviates from the normal range. When this happens, the effector will cause a response to get back within normal range.
Popuiduum size is reported in the table below. Fisi ya
analysis questions Make sure to use all of the space given for the grap
Table 1. Earth's Human Population Size
Year AD
Number of People
(in billions)
.50 Soooooo
tooooooo
1650
1750
1850
1925
1956
1966
1970
1974
1976
1980
1991
2000
2004
2008
2.0
2.5
3.3
3.6
3.9
4.0
4.4
5.5
6.0
6.4
6.7
Answer:
LICKMA
Explanation:
Ocean water is sinking at the North Atlantic Buoy Station. What happens when water of a high density sinks?
Answer:
Ocean water is sinking at the North Atlantic Buoy Station the given things have occurred.
Explanation:
The way of thermohaline course starts at high scopes, where cold seawater sinks due to its generally high thickness.
In the Northern Hemisphere, profound sinking to 2000-3000 meters happens just in the North Atlantic, not in the North Pacific on the grounds that the waters of the North Pacific are freezing and not as salty as the waters of the North Atlantic.
In this way, Earth's profound sea bowls are loaded up with waters from the northern North Atlantic and those that sink close to Antarctica.
Explanation:
it pulls in lower desity Water from surronding área
A microorganism is found in the lining of the human stomach. It has a flexible cell wall, no organelles and flagella. What is this organism
Answer:
bacteria
Explanation:
Answer:
bacteria
Explanation:
because i just did it on usatestprep and i got it right
What is El Niño?
What is La Niña?
How do El Niño and La Niña differ?
pls help and answer in short answer need help asap!!!!!!!!!!!!
El Niño: an irregularly occurring and complex series of climatic changes affecting the equatorial Pacific region and beyond every few years, characterized by the appearance of unusually warm, nutrient-poor water off northern Peru and Ecuador, typically in late December.
La Niña: a cooling of the water in the equatorial Pacific, which occurs at irregular intervals, and is associated with widespread changes in weather patterns complementary to those of El Niño, but less extensive and damaging in their effects.
how they differ: La Niña is sometimes referred to as the cold phase of ENSO and El Niño as the warm phase of ENSO. These deviations from normal surface temperatures can have large-scale impacts not only on ocean processes, but also on global weather and climate. ... Typically, El Niño occurs more frequently than La Niña.
Answer:
bruh why did you remove my first answer? i answered your question thanks for getting me flagged :)
Explanation:
A human-centered worldview states that humans, as the owners of Earth, can treat resources as they see fit.
Answer:
Human centred world view is the idea that says that humans are the most important species and representative of the earth and can use resources as much as needed.
Explanation:
It also focuses on the benefits and threats of the natural environment to the humans. Earth centred world view says that the nature is available for every species on the earth and the earth is not under our control.
Environmental world view gives us an idea about our role in the environment and our activities that causes positive or negative effect on the environment and also understand how does the world does its function.
Anthropocentric or human-centered worldview considers humans as the most significant entities and permits the use of natural resources to serve human needs primarily. Critics argue this perspective is ethically flawed and unsustainable, suggesting alternatives like ecocentric or biocentric worldviews, where all life has inherent value.
Explanation:The student is asking about the concept of a human-centered worldview, also known as Anthropocentrism. This concept, found particularly in environmental philosophy, entails humans regarding themselves as the most significant entities in the universe and Judge their actions primarily on the basis of human values and experiences. Anthropocentrism views humans as superior to nature and justifies the use of natural resources to serve mankind’s needs, even if it compromises the health of our planet.
However, critics of this worldview argue that it is ethically flawed and unsustainable, insinuating that other life forms and the natural world are valuable only for their usefulness to humans. Critics present ecocentric or biocentric worldviews as alternatives, where every life form has inherent value and humans are one part of the natural world, not above or outside of it.
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Discuss possible disturbances and their cause in an ecosystem
What is the advantage of Bacteria that survive a wide temperature
The Bacteria that survives a wide temperature can live through all climatic conditions and in all geographic conditions. They can also live through generations without getting extinct.
Explanation:
Bacteria are small wonder organisms that are present in the universe, they can change their genetic makeup in minutes and get evolved to survive through haphazard situations.
There are some bacteria that can live in extreme high temperatures and one that survives in extreme low temperatures, one that can face drought and the ones that can live in extreme wet condition.
what would occur to an autotroph population if the number of herbivores dramatically increased
Answer:
it would dramatically decrease.
Explanation:
If boron has 5 protons and 6 neutrons, what's would it's atomic number be
In any element you can find it's mass by the number of protons the element has. So in this case if boron has 5 protons it would mean that it's atomic number is also "5."
Hope this helps
Which is the best way to describe the fit between
an enzyme and its substrate?
Final answer:
The induced fit model best describes the dynamic and flexible interaction between an enzyme and its substrate, where the enzyme adjusts its shape for optimal fit.
Explanation:
The best way to describe the fit between an enzyme and its substrate is through the induced fit model. This model suggests that enzymes are not rigid structures; rather they are flexible and can adjust their shape in response to interaction with a substrate. The induced fit model compares enzyme-substrate interaction to a hug between two people, where the enzyme slightly changes its structure to achieve the best possible fit with the substrate's transition state, much like a rubber glove that molds to the shape of a hand inserted into it. This flexibility ensures a high degree of specificity while also allowing for minor adjustments to optimize interactions with different, yet structurally related substrates.
science is a body of knowledge that explains the
Answer:
. Science is a body of knowledge, which is built up through experimental testing of idea.
Science is the body of knowledge that explains the universe and its various phenomena. It gathers information using the scientific method, which comprises of making observations, forming hypotheses, executing experiments, and drawing conclusions. This results in laws and theories that can be used to predict future events.
Explanation:Science is a vast body of knowledge that aims to explain the universe and everything in it. Science can be divided into various branches such as physics, chemistry, biology, etc. Each of these branches pertains to a particular type of phenomena or entities in the world, covering everything from the smallest atoms to the largest galaxies.
In science, information is gathered through a process termed as the scientific method. It includes making observations, forming hypotheses, executing experiments, and drawing conclusions. The results of these processes can be used to predict future events of a similar nature, thereby demonstrating the explanatory nature of science.
For instance, the law of gravity was discovered through numerous observations and testing and now it explains why objects always fall towards the ground.
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Carbon dioxide is returned to the atmosphere when
During respiration in plants and animals, carbon dioxide is returned to the environment.
Explanation:Carbon dioxide is a dull gas with a thickness of about 60% which is higher than that of dry air. Carbon dioxide comprises of a carbon particle covalently twofold attached to two oxygen molecules. It is seen in atmosphere in traces.
When organism such as plant, animals, algae and other microorganism respires, it leads to return of carbon dioxide to the environment as it is the major compound formed due to the metabolic activity in them. Apart from this burning of fossil fuels and deforestation also act as cause of returning of carbon dioxide to the environment.
What is keratin and melanin and what are their function
Melanin darkens the skin and hair. Melanin protects the skin and eyes from light and the damage/radiation caused by the sun. Keratin strengthens the skin and hair cells, but can be found all over the body. Keratin is made up of proteins which gives it the strengthening properties.
You notice your friend's MP3 player is turned up so loud you can make out the words to each song-even though she is wearing
earbuds. Your friend should turn down the volume to avoid
deafness.
Ha
A. conduction
B. cerebral
C. cytotoxic
D. nerve
Answer: Nerve
Explanation:
what is 8x over 3x+6 devidwd by 12xsquare over 5(x+2)
Answer:
10/9x
Explanation:
Start with:
8x/3x+6 // 12x^2/5(x+2)
Factor out 3 then multiply the ricprocal of that fraction:
8x/3(x+2) * 5(x+2)/12x^2
Reduce the expression with x+2, then x,
8x/3 * 5/12x
Reduce numbers w/ GCD 4
2/3 * 5/3x
Lasty, multiply the fractions [multiply numerators&denominators seperatly]
2*5/3*3x
and you get...
10/9x [yayyyy!]
The Calvin cycle takes place in the stroma. What happens in the thylakoid
membranes?
The thylakoid membranes are where the light-dependent reactions occur in photosynthesis.
Explanation:The thylakoid membranes are the site of the light-dependent reactions in photosynthesis. These reactions use light energy to produce ATP and NADPH, which are energy carrier molecules that will be used in the Calvin cycle.
Final answer:
The thylakoid membranes are where light-dependent reactions take place during photosynthesis, capturing light energy to produce ATP and NADPH for the Calvin cycle.
Explanation:
The thylakoid membranes, located inside chloroplasts, are the sites where light-dependent reactions of photosynthesis occur. These membranes house photosystems that contain chlorophyll and other pigments which capture light energy. The light energy is then used to produce ATP and NADPH, two molecules that are essential for the Calvin cycle that occurs in the stroma of the chloroplast. The process overall is critical for converting solar energy into chemical energy that plants, and ultimately all life on Earth, can use.