Small, nonpolar, hydrophobic molecules such as fatty acids pass readily through a membrane's lipid bilayer.
The cell membrane, which is selectively permeable and controls the passage of molecules into and out of the cell, facilitates the movement of substances or molecules throughout the cell.
A thin polar membrane composed of two layers of lipid molecules is the lipid bilayer. These membranes are flat sheets that surround all cells and act as a continuous barrier.
A lipid-rich cell membrane will not repel small, nonpolar hydrophobic molecules like fatty acids, so they enter the cell through simple diffusion. This indicates that they easily and without assistance penetrate the lipid bilayer of a membrane. Because they are a class of lipids and soluble in the lipid layer of the cell membrane, fatty acids are able to pass through the lipid-bilayered membranes easily.
Small, nonpolar hydrophobic molecules such as fatty acids
a. pass readily through a
membrane's lipid bilayer
b. diffuse very slowly through the lipid bilayer
c requires special channels to enter a cell
d. are actively transported across cell membranes
c. must enter the cell via endocytosis
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blood vessels throughout the human body differ in terms of composition, contents, and size. however, vessels can be grouped into three classes: arteries (and arterioles, the smallest of the arteries), capillaries, and veins (and venules, the smallest of the veins). in which class of blood vessel does blood pressure refer to the pressure that blood exerts against them?
In arteries class of blood vessel does blood pressure refer to the pressure that blood exerts against them
Blood pressure is the force of your blood against the artery walls. Blood is transported from your heart to different regions of your body through arteries. Throughout the day, your blood pressure typically increases and decreases.
The main blood vessel supplying the muscles in your upper arm and elbow joint is called the brachial artery. It's frequently used to check blood pressure. Because the brachial artery is located close to the skin's surface, violent traumas like arm fractures might harm it.
Blood pressure is also influenced by arterial wall thickness and flexibility. The arteries experience pressure every time the heart contracts and relaxes. When blood is being pushed from the heart into the arteries, the pressure is at its highest.
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Question 13 of 25
Engineers who work for a museum are designing a scale model of the
continent of Antarctica using a scale of 1:10,000,000. If Antarctica is about
5,300 km (5,300,000 m) across, how wide will the model be?
A. 53,000 m
B. 0.53 m
C. 5.3 m
D. 0.00053 m
well
1:10,000,000 = x:5,300,000
[tex] \frac{1}{10000000} = \frac{x}{5,300,000 } \\ 10000000x = 5,300,000 \\ x = \frac{5,300,000}{10000000} \\ x = 0.53[/tex]
so the answer is B. 0.53
How are metaphase II and anaphase II different from metaphase I and anaphase lI?
I don't know if the second anaphase was suppost to be anaphase or anaphase II. I don't know if my typed this up on accident teacher or if she meant to do that I'm not sure. you might need to watch Meiosis (updated) amoeba sisters. I couldn't find the answer.
The main difference between anaphase 1 and 2 is that homologous chromosomes are segregated during anaphase 1, while sister chromatids are separated during anaphase 2.
What characterizes metaphase?Phase of mitosis that occurs between prophase and anaphase, with a shorter duration than prophase. Chromosomes reach maximum shortening during metaphase. The mitotic spindle is formed, with some fibers that go from pole to pole and others that are attached to the chromosomes by the centromeres.
How important is anaphase?Anaphase is the phase in which the sister chromatids of the duplicated chromosomes are pulled apart, pulled through the shortening of the microtubules that are attached to the kinetochores, and the degradation of the tubulin molecules that hold the sister chromatids together.
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thanks to a novel recessive mutation, a certain plant species has begun to invade colder arctic regions outside of its normal range. however, this cold-tolerant mutation has not yet become fixed in the population. a second mutation arises that promotes self-pollination. do you predict that the self-pollination allele will be selected for in the arctic regions? why or why not?
Plant cell death is the intracellular sequence of activities that ends the life processes of a plant cell. Plant cells can die through necrosis, apoptosis, or autophagy.
What happens to a plant eventually, causing it to die?Senescence describes all of the alterations that occur in a plant and ultimately result in the death of its cells, tissues, and ultimately the entire plant body. Even in extremely young, thriving plants, these alterations can be visible in a few cells.
An embryo and endosperm, both of which are necessary for the growth of a viable seed, are produced in angiosperms as a result of double fertilization. Plants that are diploid create diploid embryos and triploid endosperm.
Why does the photoperiodic route, which many plants utilize, control when flowers form? In this plant, temperature and day duration both affect flowering. Flower formation is being hindered by the warm environment and prolonged exposure to light.
The aberrant transformation of floral components into leafy structures is known as phyllody. Although environmental variables that lead to an imbalance in plant hormones may also be to blame, phytoplasma or virus infections are the usual culprits.
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Dwarfism in pea plants is caused by a single gene. Tall is a dominant trait and dwarf is a recessive trait. If two dwarf pea plants were crossed, their offspring will be?.
Tall is a dominant trait and dwarf is a recessive trait. If two dwarf pea plants were crossed, their offspring will be dwarf because there in no dominant gene to mask the dwarfism since both parents are homozygous recessive.
Short stature caused by a genetic or medical disease is known as dwarfism. A height of 4 feet 10 inches (147 cm) or less in adulthood is considered dwarfism. Individuals with dwarfism are typically 4 feet tall as adults (122 cm). Dwarfism is brought on by a variety of medical disorders. The term "homozygous recessive" refers to an organism that possesses two identical copies of the recessive gene. Learn more about the meaning of homozygous recessive and examples of genetic illnesses caused by this gene.
Recessive alleles, also known as homozygous alleles, only manifest their effects in individuals who have two copies of the allele.
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How did the scientific research that started the Green Revolution affect society?
The scientific research that started the green revolution affected society in such a way that (C) It resulted in increase food production, which improved peoples lives.
Green revolution, a significant rise in the production of food grains like wheat and rice, largely due to the introduction of new, high-yielding varieties into developing nations around the middle of the 20th century.
Mexico and the Indian subcontinent were its initial dramatic success. Concerns about cost and the potential for adverse effects on the environment stem from the fact that the new varieties necessitate a significant amount of pesticides and chemical fertilizers to achieve their high yields.
These grains have frequently yielded even lower yields than the older varieties, which were better suited to the local conditions and had some resistance to pests and diseases. Poor farmers cannot afford the fertilizers and pesticides.
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Remembering that proteins are made in cells that are 70% water- and water is polar-
describe how you might imagine that a protein spontaneously folds up into a complex 3D
shape.
A protein can spontaneously folds up into a complex tridimensional 3D shape by inducing polar domain groups to outside the molecule and hydrophobic domains the inside, which allows forming stable bonds with surrounding water molecules.
What is protein folding?Protein folding is the process for which a protein adopts its final 3D shape, which is fundamental for its function and to form chemical bonds with the surrounding aqueous environment. During folding, protein hydrophobic domains are generally located inside the molecule in order to avoid the repulsion of charges, while polar groups such as R-charged groups are located outside.
Therefore, with this data, we can see that protein folding is fundamental and polar domains are generally located outside the molecule.
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Explain radiometric dating. Provide an example of how this process is used to determine absolute age.
Radiometric dating is a method of determining how old something (perhaps a wooden artifact, stone, or fossil) is based on the presence of radioactive isotopes.
The basic logic behind radiometric dating is to determine the age of the sample by comparing the presence of radioisotopes in the sample to their known abundances and known half-lives (decay rates) on Earth.
Radiometric dating helps determine the age of ancient objects because many radioactive materials decay slowly. Rock age is determined by radiometric dating, which examines the proportions of two different isotopes in the sample.
Because radioactive isotopes decay at predictable rates, geologists can use instruments like this thermal ionization mass spectrometer to date samples. The half-life of an element is the time it takes for exactly half the amount of that element to decay. The age of a sample can be determined from the ratio of parent and daughter isotopes in the sample.
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What type of mutation results from the addition of extra basesa. Duplicationb. Inversionc. Insertiond. Translocatione. Substitutionf. Deletion
The addition of one or more nucleotide base pairs into a DNA sequence happens due to polymerase slipping and it's called insertion. Therefore, the correct answer is c. Insertion
1. The enzyme pepsin is found in the stomach. Which medicine is most likely to directly interfere with pepsin's function?
A. a medicine that blocks neural impulses
B. a medicine that affects pH
C. a medicine that prevents clotting
D. a medicine that lowers cholestrol levles
the major difference between angiosperms and gymnosperms comes from the group of answer choices presence or absence of a protective covering over the ovule. presence or absence of vascular tissue. dominance of sporophyte in angiosperms and dominance of gametophyte in gymnosperms. production of microspore versus megaspores.
The ovule's protective coating is present or absent. The existence or absence of a protective covering around the ovule is the key distinction between angiosperms and gymnosperms.
What distinguishes gymnosperms from angiosperms in terms of their ovules?In angiosperms, the female gametophyte is found in the ovule, a contained structure inside the ovary; in gymnosperms, the female gametophyte is found on the female cone's exposed bracts. Gymnosperms do not have double fertilisation, which is a crucial stage in the life cycle of angiosperms.
Gymnosperms are referred to as non-flowering plants, whereas angiosperms are referred to as blooming plants. Gymnosperms lack flowers or fruits in favour of having bare seeds on the surface of leaves, whereas angiosperms have seeds encased in an ovary (a fruit).
Gymnosperms and angiosperms vary primarily in how their seeds are produced. Angiosperm seeds form in the ovaries of flowers and are encased in a fruit for protection.
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the components of a cell and the arrangement of these individual parts within the cell form the cellular________
Answer: A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
when you have a severe fever, what grave consequence may occur if the fever is not controlled?when you have a severe fever, what grave consequence may occur if the fever is not controlled?change in the tertiary structure of your enzymesbinding of your enzymes to inappropriate substratesdestruction of your enzymes' primary structureremoval of amine groups from your proteinsremoval of the amino acids in the active sites of your enzymes
"Change in the folding of enzymes" is the grave consequence that may occur if the fever is not controlled.
When someone gets a fever, their body temperature is high. Infections typically cause it. If a fever is not treated, a change in the way your enzymes fold may have serious consequences. Hydrogen bonds and other weak intermolecular interactions hold enzymes in place while they are folding.
The high temperatures brought on by a fever can disrupt these relationships. Enzymes that are not folded can harm a cell because they cannot fulfill their necessary activities when they are unfolded. This is because their three-dimensional form determines how they work. Because heat accomplishes those things to proteins, the other options are not fatal outcomes of a fever.
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Will selection eliminate a harmful recessive allele from a population as quickly as it will remove a harmful dominant allele? Why or why not?
Answer:
no
Explanation:
you can see dominant traits on every organism that can have them, meanwhile you can have carriers for recessive traits, so there can be hidden traits, thus it will take
evidence for the spiral nature of dna came from . a. studies of disease-causing bacteria b. base rule studies c. bacteriophage studies d. x-ray crystallography studies
Studies using x-ray crystallography provided proof of DNA's spiral structure.
How did Watson and Crick figure out what DNA's structure was?Watson and Crick came up with a structure for DNA using proportionate metal models of the individual nucleotides that was in agreement with Chargaff's Rules and with x-ray crystallography data that was received (with some debate) from another researcher by the name of Rosalind Franklin.
Using X-ray diffraction, Franklin and Maurice Wilkins discovered hints concerning the structure of DNA. Franklin's "photograph 51" X-ray diffraction image of DNA demonstrated that DNA crystals take the form of an X on the film used for X-rays. These X-shaped patterns are common in molecules with helical shapes.
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Which of the following factors contribute to the spread of diseases?A. All of theseB. Poor public health measuresC. Evolution of microbesD. Climate change
The fast spread of diseases is due to the lack of hygiene, the poor salubrity in public spaces, and the contamination of food and water.
Climate change is mainly due to the high concentration of greenhouse gases, and those in high concentrations have demonstrated adverse effects on health.
The fact that drugs are getting less effective in stopping the spread of diseases, and eradicating them, also makes the disease harder to control. And also, some mutations of the microbes can contribute to their ability to infect, and therefore spread the disease.
All of the factors contribute to the harder control of diseases, and might as well help them to spread. Therefore, the answer is A.
the percentage of homozygous recessive individuals (for one particular trait) in a population is found to be 49%. assuming the population is at hardy-weinberg equilibrium, what is the frequency of the recessive allele? (allele frequencies are displayed as a number between 0-1. do not give a percentage).
The frequency of the recessive allele is 0.7.
As per the question, the percentage of homozygous recessive individuals = 49% or a frequency of 0.49. So, frequency of recessive allele is the square root of 0.49 = 0.7
The Hardy Weinberg rule states that in the absence of circumstances that promote evolution, the genotype and allele frequencies in a population remain constant. It claims that the binomial expansion of the square of the sum of p and q can be used to describe the total genotype frequencies. The binomial expression is as follows:
[tex](p+q)^{2}[/tex] = [tex]p^{2}[/tex] + [tex]q^{2}[/tex] + [tex]2pq^{}[/tex]
Here, p and q are the frequencies of dominant and recessive alleles respectively.
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Describe the phase change of the ice if it were to be left sitting out.
The phase change that occurs when the ice is left sitting out will be melting that causes solid to turn into liquid.
Melting is the phenomenon in chemistry where a solid substance is converted into liquid. This change happens due to the difference in the temperature requirement. For a substance to be solid, the temperature must be low while it should be high for liquid phase.
Solid are those substances that have strong intermolecular forces and their molecules lie very closely packed in a definite shape. Thus, solid substances have a definite shape and volume. The kinetic energy pf solids is quite less.
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Example A: A person ate a ham sandwich and ran a race. She finished in first place.
Claim: The ham sandwich was the reason she won, and she should eat ham sandwiches before all her races.
Example B: A person ate different meals before 20 races that he ran. For ten races, he ate spaghetti before the race and finished in either first, second, or third place. For the other ten races, he ate fried chicken and finished in second place once, but finished in sixth or seventh place in the rest of the races.
Claim: Spaghetti helped his performance, and he should eat spaghetti before all his races.
Which claim is based on higher-quality evidence?
Answer:
Explanation:
there are more trials, that contain solid results, rather than a 1 time, so bee(I can't type the letter by itself for some reason)
A student conducted an original, well-designed experiment, carefully following proper scientific procedure. In order for the conclusions to become generally accepted, the experiment must
For the experiment to have an accepted conclusion it must be repeated so as to verify reliability of the data.
Any important results must be more than a one-off finding and be naturally repeatable, according to the reliability theory. It must be possible for other researchers to conduct the exact same experiment, under the identical circumstances, and produce the same outcomes. The experiment and research may have not met all testability requirements without this replication of statistically significant results. This condition must be met for a hypothesis to become a recognized scientific truth. In general, it is acceptable to anticipate that the instruments will continue to be precise and truthful.
The scientific community is more likely to accept your conclusion if you built your experiment with validity and reliability in mind.
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Your question is incomplete, for the full question please refer:
A student carried out a unique, well-planned experiment while meticulously adhering to the rules of science. The experiment has to be the following for the conclusions to be widely accepted:
contains the several experimental variablessupport original hypothesisbe repeated to verify reliability of databe conducted by any scientist.a boreal forest that is dominated by evergreen conifer trees like spruce, fir, cedar, and pine can withstand intense cold and drought. during the brief summer the soil becomes water logged and forms acidic bogs or muskegs. what is another name for this biome besides a boreal forest or an evergreen coniferous forest?
The boreal forest, also known as coniferous forest, is found in most of Canada, Alaska, Russia, and northern Europe between 50o and 60o north latitude. Taiga is a term used to describe boreal forests in North America.
What is the boreal forest also known as?Taiga, also known as boreal forest, is a biome (major life zone) of vegetation that consists primarily of cone-bearing needle-leaved or scale-leaved evergreen trees and is found in northern circumpolar forested regions with long winters and moderate to high annual precipitation.The boreal forest, also known as coniferous forest, is found in most of Canada, Alaska, Russia, and northern Europe between 50o and 60o north latitude. Taiga is a term used to describe boreal forests in North America.To learn more about : Boreal forest,
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What is the best definition of fossil range?
answer: The period of time when an organism first and last appears in the sedimentary record.
The best definition of fossil range: It is the period of time when the appearance of an organism is observed first as well as last in the sedimentary record.
The question is incomplete. The complete question is:-
What is the best definition of fossil range?
Hints:-
The diversity of organisms that can be observed in proximity in a rock unit.
Total number of contemporary organisms in the geological record.
The time when an organism goes extinct.
Period during which organisms first and last appear in the sedimentary record.
The geographic area over which an organisms thrives.
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What did West Virginia change in its constitution compared to that of Virginia?
West Virginia compared to that of Virginia does not feature a process for initiated constitutional amendments in their constitution.
What is constitution?A constitution is described as the aggregate of fundamental principles or established precedents that constitute the legal basis of a polity, organization or other type of entity and commonly determine how that entity is to be governed.
The state of west Virginia has some differences in their constitutional amendment processes which is means that they do not feature the process for initiated constitution amendment.
Therefore in conclusion, amendments in West Virginia can only be put on the ballot done either through referral by the legislature or by a constitutional convention.
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Amoebas are single celled organisms that take in particles, and sometimes smaller organisms, as food by enclosing the food particle
in its membrane. The amoeba requires energy for this process.
Which structure in an amoeba produces the energy it needs?
O vesicle
O nucleolus
O vacuole
O mitochondria
Answer:
mitochondria
Explanation:
Which best describes mitochondrial DNA (mtDNA)?
Mitochondrial DNA is the same as nuclear DNA.
Mitochondrial DNA is inherited through the father.
Mitochondrial DNA can be traced for generations.
Mitochondrial DNA requires large amounts for testin
Mitochondrial DNA can be traced for generations best describes mitochondrial DNA (mtDNA).
Mitochondrial DNA is the circular chromosome found inside the cellular organelles called mitochondria. Located in the cytoplasm, mitochondria are the site of the cell's energy production and other metabolic functions. Offspring inherit mitochondria and as a result mitochondrial DNA from their mother.
The mitochondrial genome is circular, whereas the nuclear genome is linear. The mitochondrial genome is built of 16,569 DNA base pairs, whereas the nuclear genome is made of 3.3 billion DNA base pairs. Unlike the DNA inside the nucleus, it is not a mixture of our parent's DNA, and each person's mtDNA is nearly identical to his or her mother's mtDNA.
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g if the ecologist placed 12 kangaroo rats in the area between the patches and the animals followed an ideal free distribution, approximately how many individuals would be in each habitat?
8 in the high quality patch, and 4 in the low quality patch would be in each habitat.
What is a habitat?A habitat encompasses the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species.
From the question, the ideal distribution between the two patches should be such that each of them receive the most per capita.
An organism habitat is any home that is a natural environment in which an animal, plant, or other organism lives.
There are basically three types of habitat which includes:
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The complete question is attached in an image:
8
Which evidence can the student collect to support her hypothesis?
A. She can visually count the number of rocks in the bottle.
B. She can observe condensation on the inside of the bottle.
C. She can add a new plant to the plastic bottle every day.
D. She can observe precipitation in her neighborhood every day.
The evidence can the student collect to support her hypothesis is she can visually count the number of rocks in the bottle. Thus, option A is correct.
What is experiment?
An experiment has been defined as process that has been designed to diagnose the hypothesis which has the portion of scientific method or procedure.
Scientific experiment has been done by testing the particular medicine on an animal and by observing the impact of medicine on the animal as well as the reaction of the animal.
There are mainly three types of the scientific experiments and these are experimental which consist of major level of scientific experimentation. The second type has Quasi- experimental and third type is non- experimental study or reasearch.
Therefore, The evidence can the student collect to support her hypothesis is she can visually count the number of rocks in the bottle. Thus, option A is correct.
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Magma that forms subduction zones is high in which volatile substance? 20 points
Answer:
The most abundant volatile in magma is water (H 2 O), followed typically by carbon dioxide (CO 2), and then by sulphur dioxide (SO 2)
Explanation:
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which of the following characteristics is/are associated with rem sleep? group of answer choices a. sleep spindles b. delta waves c. declarative memory consolidation d. human growth hormone release e. muscle paralysis
The following characteristics which are associated with rem sleep include the following below:
delta waveshuman growth hormone releasemuscle paralysis.What is REM sleep?This is referred to as rapid eye movement sleep and it occur about an hour after an individual or animal falls asleep and is accompanied by an increase in breathing and heart rate.
This type of sleep is characterized by an increase in brain activity which results in the occurrence of dream. This type of sleep also involves a low muscle tone which is responsible for what causes the muscle paralysis which is experienced in this phase.
It occurs when the person isn't yet in deep sleep and leads to the increase in growth hormones in the body and the presence of delta waves which makes them the correct choices.
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interrupting the night with a flash of light can trigger flowering in a long-day plant. why doesn't introducing a short period of darkness during the day cause a short-day plant to flower?
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