Cell membranes are characterized by the presence of.
Answers
Answer:
phospholipids
Explanation:
The presence of phospholipids, which is the most numerous molecule in cell membranes.
Related Questions
Which of these describes a difference between viruses and cells? Your answer: A. Cells contain protein, and viruses contain only carbohydrates. B. Cells reproduce independently, and viruses require a host to reproduce. C. Viruses have flagella, and cells have only cilia.
Answers
The difference between viruses and cells is that viruses cannot reproduce without entering a host cell while normal cells can reproduce independently. The correct option would, thus, be B.
Viruses are sometimes referred to as non-living because they are made of molecules that are capable of doing nothing without using the machinery of a host cell.
Outside a host, viruses tick all the characteristics of non-living things. But when they enter into a host cell, they can use the genetic mechanism of the host to reproduce, thereby fulfilling the characteristics of living things.
This is unlike normal cells. They have the ability to grow in size and reproduce without the assistance of any other cell.
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true or false: mucous connective tissue is the first type to emerge in the developing embryo.
Answers
The correct answer is False. Mucous connective tissue is not the first type to emerge in the developing embryo.
The first type of connective tissue to emerge in the developing embryo is mesenchyme, which is a type of embryonic tissue that gives rise to all other types of connective tissue.
Mesenchyme is present during the early stages of development and is characterized by its loose arrangement of cells and abundant extracellular matrix. As development proceeds, mesenchyme differentiates into different types of connective tissue, including mucous connective tissue, which is a specialized type of connective tissue found in the umbilical cord and some other structures in the body.
Mucous connective tissue is rich in a gel-like substance called mucin, which helps to protect and lubricate tissues. While mucous connective tissue is not the first type to emerge in the developing embryo, it is an important component of the developing body and serves important functions in maintaining tissue health and function.
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Which statement describes the chamber marked with a star? Human heart A. It is the right atrium, and it pumps blood to the lungs. B. It is the right ventricle, and it pumps blood to the lungs. C. It is the right atrium, and it pumps blood to the body. D. It is the right ventricle, and it pumps blood to the body.
Answers
Answer: It is the right ventricle, and it pumps blood to the body.
Explanation:
Answer:
It is the right ventricle, and it pumps blood to the lungs.
RIGHT ANSWER
suppose that on a dirty hospital floor, one bacterium transfers a drug-resistance factor (gene) to another during cell-to-cell contact. this is an example of:
Answers
One bacterium transfers a drug resistance factor(gene) to another during cell to cell contact. This is an example of conjugation.
Bacteria can acquire antibiotic-resistance genes from other bacteria in several ways. By the process of simple conjugation, bacteria can transfer genetic material, including genes encoding resistance to antibiotics from one bacterium to another. Poor hygiene, poor sanitation and poor infection control are three interconnected key factors contributing to the spread of resistant bacteria in health care facilities in the community. Antibiotic-resistant organisms appear to be biologically fit and are capable of causing serious, life-threatening infections that are difficult to manage because treatment options are limited. Genes can encode proteins or ribosomal RNA that enables bacteria to evade the actions of antibiotics.
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PLEASE HELP THIS IS TIMED
Answers
Answer:
Shoud be the answer in the middle
Explanation:
Do a punnett square just to be sure:)
Answer:
BB and Bb
Explanation:
It's this because the dominant gene is present so either way they're going to have brown hair. If it was two blonde people then bb would be one of the answers if that makes sense.
Help Please, I'll give Brainliest
A group of wolves is led by a male wolf and a female wolf. The two wolves lead the hunting and get to eat the captured prey first. They are the only wolves in the group who have pups. The other members of the group help to feed and care for the pups. The group works together to stop other wolves from entering the area where they live.
Identify the social structure and describe the social behaviors of the wolves. Explain how these behaviors help the wolves survive.
Answers
Answer:
the other wolves act as though they are their "aunts" and " uncles". It helps them survive by making sure the 2 wolves that lead the pack don't have to work too hard and they all work together as a bug family
Answer:
Wolves are very social animals. They live and hunt together in groups called packs. A wolf pack is really just another name for a family of wolves. A pack is usually made up of an adult male and female wolf and their offspring of various ages. Pack sizes range from three to twenty wolves.
A wolf pack has a definite social structure and rules of conduct. The pack leaders are the alpha male and female. These two animals are dominant over all the other wolves in the pack. The alpha male and female are the only wolves that breed and produce pups in the pack, and they also get to eat first at kills.
Wolf pups are born in the spring after a gestation period of around 63 days. A female can have anywhere between one and nine pups, but the average litter size is four pups. The pups are born with their eyes closed and are totally helpless. Pups weigh about one pound at birth. The female stays in the den nursing and caring for her pups while the other pack members hunt and bring back food for her to eat.
Explanation:
Which birthmarks are characterized by pink, patch-like lesions that occur from permanent blood vessel abnormalities?
Answers
Although they can form anywhere on the body, strawberry hemangiomas (also known as strawberry marks, nevus vascularis, capillary hemangiomas, or hemangioma simplex) are most frequently found on the face, scalp, back, or chest. They are made up of tiny, narrowly spaced-out blood vessels. They may not be present at birth, but they may appear after a few weeks.
What do birthmarks entail ?Any patch or mark that develops on the skin at birth or very shortly after is referred to as a birthmark. They are common, and many young people have some sort of mark. The majority are benign, and some even go away as the child becomes older. Sometimes a birthmark might be a sign of other conditions or illnesses.
Birthmarks with vascular characteristics result from abnormal blood vessel growth. Either they are wider than usual or there are an excessive number.Learn more about Birthmark here:
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my learnings about fossil fuels are
Answers
Answer:
oil
coal
natural gas are the fossil fuels
L2. 4. A helicopter turning left while at a consistent speed. *
O Speed
O Velocity
O Acceleration
Answers
The correct answer is Velocity. When a helicopter is turning left at a consistent speed, its velocity is changing. Velocity is a vector quantity that includes both speed and direction.
When a helicopter is turning left at a consistent speed, its velocity is changing. Velocity is a vector quantity that includes both speed and direction. In this case, the helicopter is maintaining a constant speed but changing its direction, which means its velocity is changing. The change in velocity is due to the change in direction, and it is referred to as the centripetal acceleration.
Acceleration, on the other hand, refers to the rate of change of velocity. In this scenario, although the helicopter is changing its direction, its speed remains constant. As a result, there is no change in the magnitude of its velocity, and therefore there is no acceleration.
Therefore, the correct answer is velocity.
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Notch and delta are both transmembrane proteins involved in cell communication in the developing nervous system of vertebrate animals. What makes notch different from delta?.
Answers
Which best describes the difference between protists that have cilia and those that have flagella?
O Those that have cilia are animal-like protists, and those that have flagella are plant-like protists.
O Those that have flagella are animal-like protists, and those that have cilia are plant-like protists.
Those with cilia move using hair-like extensions, and those with flagella move using a single whip-like extension.
Those that have cilia are heterotrophs, and those that have flagella are autotrophs.
Answers
Answer:
C.
Explanation:
Those with cilia move using hair-like extensions, and those with flagella move using a single whip-like extension.
Protists that move with cilia move using hair-like extensions, and those with flagella move using a single whip-like extension.
What are protists?Protists are single-celled eukaryotic organisms which are either free-living or parasitic.
Protists include paramecium, euglena, amoeba.
Protists have various structures for movement.
Protists can either no be with pseodupodia, flagella or cilia.
Those with cilia move using hair-like extensions, and those with flagella move using a single whip-like extension.
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Can someone answer this please?
Answers
California
Arizona
Idaho
Oklahoma
Texas
TX
OK
Recet
Drought persists intensifies
Drought remains but improves
Drought removal likely
Drought development likely
Select all the correct answers
Answers
California: Drought persists.
Arizona: Drought intensifies.
Idaho: Drought remains but improves.
Oklahoma: Drought removal likely.
Texas: Drought development likely.
These statements summarize the expected conditions regarding drought in each state based on the given information.
Based on the given information, we can make some predictions about the drought conditions in different states:
California: Drought persists - This means that the drought continues to affect California, indicating ongoing water scarcity and dry conditions.
Arizona: Drought intensifies - The drought in Arizona is expected to worsen, suggesting that water scarcity and dry conditions will become more severe.
Idaho: Drought remains but improves - Idaho is experiencing a continuing drought, but there is some improvement in the conditions. While water scarcity may still persist, there might be some relief compared to previous conditions.
Oklahoma: Drought removal likely - Oklahoma is likely to experience relief from the drought, indicating an improvement in water availability and a reduction in dry conditions.
Texas (TX): Drought development likely - Texas is anticipated to face the development of a new drought. This suggests that water scarcity and dry conditions may increase in the state.
Oklahoma (OK): Drought removal likely - Similar to the previous mention, Oklahoma is expected to experience relief from the drought.
In summary, the correct answers are California (drought persists), Arizona (drought intensifies), Idaho (drought remains but improves), Oklahoma (drought removal likely), and Texas (drought development likely). These predictions are based on the provided information about the current and expected drought conditions in these states.
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When do new species move into an area and colonize it? During ecological , new species move into an area and colonize it.
Answers
During ecological SUCCESSION, new species move into an area and colonize it. Subsequently, these species are also replaced by newer species.
Ecological succession can be defined as the process by which communities, i.e., a group of populations living in a determined area, change (evolve) over time.
This concept (ecological succession) refers to the sequential natural process of colonization of species in a particular ecosystem.
Ecological succession involves several consecutive stages:
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what is the difference between direct and indirect surveys
Answers
Answer:
Explanation:
Direct services are paid for directly by those who engage the service, Indirect services are paid for by the government from the public fund (taxes from people who enjoy these services).
which brain region is associated with language in humans? occipital lobe temporal lobe frontal lobe parietal lobe
Answers
The brain region that is associated with language in humans is primarily the left hemisphere of the brain, specifically the temporal and frontal lobes.
The temporal lobe is responsible for processing and understanding language, while the frontal lobe is involved in producing language and controlling speech. However, the parietal and occipital lobes also play a role in language processing, such as interpreting visual information related to language and spatial relationships.
Additionally, research has shown that the brain's plasticity allows for the reorganization of language function to occur in the right hemisphere in some individuals, such as in cases of damage to the left hemisphere. This phenomenon is more common in children and young adults and is thought to be due to the greater malleability of the brain during development.
Furthermore, multilingual individuals may exhibit greater activation in certain brain regions associated with language processing, indicating that the brain can adapt to different language systems.
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human chorionic gonadotropin (hCG)
The hormone produced by cells around the embryo that maintains the corpus luteum and pregnancy is called
Answers
The hormone produced by cells around the embryo that maintains the corpus luteum and pregnancy is called human chorionic gonadotropin (hCG).
Human chorionic gonadotropin (hCG) is a hormone that is produced by cells around the embryo, that is, trophoblastic cells that develop into the placenta, after fertilization. Its main function is to maintain the corpus luteum during the early stages of pregnancy. The corpus luteum is a temporary endocrine structure that develops after the release of an egg from the ovary, that is, after ovulation. It produces progesterone, which is essential for the maintenance of pregnancy in humans.
If an egg is fertilized by a sperm, the resulting embryo secretes hCG, which signals the corpus luteum to continue producing progesterone. This is necessary to prevent the lining of the uterus from shedding and to maintain the pregnancy. If the corpus luteum did not receive this signal, it would degenerate after about 12 days, and progesterone levels would decline. This would cause the lining of the uterus to be shed and menstruation to occur. The levels of hCG in a woman's blood and urine can be used to diagnose pregnancy. hCG levels rise rapidly in the first few weeks of pregnancy and can be detected by a blood or urine test. After about 10 weeks of pregnancy, hCG levels start to decline and eventually level off.
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Order the steps that occur as a protein is synthesized within a cell and finally excreted for use outside of the cell.
Answers
Answer:
1. The protein is synthesized within the cell using the information in the cell's DNA.
2. The protein is folded into its final shape.
3. The protein is transported to the cell membrane.
4. The protein is excreted from the cell, typically with the help of special protein-transporting molecules.
5. The protein is now outside of the cell and can be used for its intended purpose.
Explanation:
Can YOU curl your tongue up on the sides?
Scientists Debunk Familiar Tongue-Rolling Lore | HuffPost Impact
We are pretending that tongue-curling in humans is a dominant genetic trait.
Suppose a man who is Tt for tongue-curling marries a woman who is also Tt for this trait. What are the possible genotypes and phenotypes of their children, and the percent chance for each?
Genotype Phenotype (curl or no curl) Percent Chance (number only)
TT
Tt
tt
Word Bank:
2525curl750100no curlcurl50
Answers
Rolling, folding, spinning, adjusting, and turning of the tongue are all included in the definition of tongue twisting.
What is tongue twisting.?The tongue is a muscle organ in humans that can detect food flavors and is utilized for verbal communication. Genetics has an impact on every facet of a person.
The shape or movement of one's tongue is also influenced by their unique gene makeup. The ability to twist one's tongue is neither a benefit nor a drawback.
Not a genetic disorder or disease, tongue-twisting is an individual's distinctive use of his tongue. An allele of the gene known as the dominant allele is responsible for the ability to roll one's tongue.
Therefore, Rolling, folding, spinning, adjusting, and turning of the tongue are all included in the definition of tongue twisting.
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explain the effects on anaerobic respiration on plants and animals
Answers
Answer:
Anaerobic respiration in plants produces ethanol (C2H5OH) whose accumulation may kill the plant, whereas in animals anaerobic respiration produces lactic acid (CH3CH(OH)COOH) that however cannot cause death of animal but lead to minor muscle cramps, but they can be cured with hot water bath or a massage.
The reaction in which the growing chain from the tRNA in the P site covalently joins the chain to the tRNA in the A site is catalyzed by which of the following enzymes?
a) Gyrase
b) Topoisomerase
c) Peptidyl transferase
d) Aminoacyl - tRNA synthetase
e) Ligase
Answers
The reaction in which the growing chain from the tRNA in the P site covalently joins the chain to the tRNA in the A site is catalyzed by the enzyme c) peptidyl transferase. Hence, the correct answer is option c) Peptidyl transferase.
Peptidyl transferase is a ribozyme, which means it is a type of RNA molecule that can catalyze chemical reactions. It is located in the ribosome and is responsible for the formation of peptide bonds between amino acids during protein synthesis.
So, the reaction in which the growing chain from the tRNA in the P site covalently joins the chain to the tRNA in the A site is catalyzed by the enzyme peptidyl transferase.
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According to the cladogram below, which of the following organisms had a
segmented body and jaws but no limbs?
A. D
OB. E
OC. C
OD. F
Answers
Cladograms are graphic representations of the relationship between different taxa according to derivated characters. Option A is correct. Group D has a segmented body and jaws, but no limbs.
What is a cladogram?
A Cladogram is a graph drown as a tree, which is based on cladistic analysis. It represents the common ancestral relationships and the emergence of different characters among the involved groups.
The tree-type graph is a ramified diagram that represents the relationship between the involved taxa. The cladistic analysis follows the maximum parsimony criterium. Explains the character state from the point of view of the fewest changes through history.Explains evolution with the minimal amount of evolutive changes.
It recognizes the monophyletic groups as natural groups. These groups are the clades, and their classification -sequencing- represents their phylogeny.
The sequencing term refers to lists of groups according to their relation. One group is the brother-group of the following one.So the cladogram represents the relationship between groups according to a derived character.
The derivated character is any trait that a group passes to its descendants.
Through evolution, the characters change, and new changes are added. When referring to a derivate character, we mean that all the subsequent species in the cladogram carry the trait.
In the provided cladogram, segmentes bodies, jaws, limbs and other traits are derivated characters.
Group D has a segmented body and jaws, but does not express limbs.
This last trait emerged later in history and is expressed by groups E, F and G.
Option A is correct. Group D.
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Enamel is the hardest substance in the human body. Justify your answer.
Answers
Enamel is indeed the hardest substance in the human body. It is present in teeth of humans. It covers every tooth and provides the hard layer.
Tooth Enamel is hard glossy substance that is comprised of calcium and phosphate mineral crystals which in return makes our teeth more stronger. Teeth enamel care is extremely important to maintain the oral health of teeth.
Tooth Enamel is one of the major tissue that make up tooth in humans. It covers the top layer of the teeth known as Crown. Calcium hardens the tooth enamel. Enamel contains 96% of the minerals. The color of Enamel varies from light yellow to white.
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9. Vitamins are essential to the survival of organisms because vitamins usually
function as
A. substrates
B nucleic acids
coenzymes
D. nucleotides
Answers
Answer:
It's C
Explanation:
What are coenzymes? Vitamins are essential to the survival of organisms because vitamins usually function as these. What is lipase? Of protease is an enzyme that catalyzes reactions involving proteins, whereas this term can be used for enzymes that catalyze fashions involving fats, oils, and waxes.
Answer:
A
Explanation:
substrate.
That's the correct answer
please help asappppp
Answers
Answer:
Cell X
Explanation:
Cell X is the only cell that has chloroplasts, a pigment found in leaf cells of plants / sometimes other parts may have too. Animal cells almost never have chloroplasts
The image shows a facility that converts the energy of moving water into
electrical energy. What is one advantage of using this technology in place of a
coal-burning power plant?
A. It produces more water pollution.
B. It causes no harm to ecosystems.
C. It does not emit greenhouse gases.
D. It is fueled by a nonrenewable resource.
Answers
Answer:
C. It does not emit greenhouse gases.
The one advantage of using this technology in a coal-burning power plant is that it does not emit greenhouse gases. Therefore, option C is correct.
How does electrical energy formed from moving water?Electrical energy can be generated from moving water through a process called hydroelectric power generation. Hydroelectric power plants use the kinetic energy of moving water to spin turbines, which in turn generate electricity.
Hydroelectric power generation is a renewable source of energy that produces no carbon emissions or air pollution. It is one of the most widely used forms of renewable energy, providing electricity to millions of people worldwide.
However, the construction of dams and reservoirs can have significant environmental impacts on the surrounding ecosystems and habitats. Hence, option C is correct.
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which statement is false?human beings are bipedal and have paired extremities.the human skeleton consists of 306 bones.the body of every person is composed of the same materials commonly found in the earth.
Answers
The statement that is false among the following three statements is "the body of every person is composed of the same materials commonly found in the earth."This is a false statement because the human body is composed of various elements that are not commonly found in the earth.
The majority of the elements in the human body are carbon, hydrogen, oxygen, nitrogen, calcium, and phosphorus. These are the six main elements that are found in the human body in large amounts. There are some minor elements present in the body in smaller amounts, which include iron, sodium, chlorine, potassium, and magnesium. There are a total of 26 elements that make up the human body. These elements are arranged in different proportions and combinations to form different types of molecules. Proteins, fats, carbohydrates, and nucleic acids are all made up of these elements.The other two statements are true. Human beings are bipedal and have paired extremities. The human skeleton consists of 206 bones, not 306. This is an important fact to remember. There are two types of skeletons that can be found in the animal kingdom: exoskeletons and endoskeletons. The human body has an endoskeleton, which means that the bones are located on the inside of the body, providing protection for the organs and support for the body. Therefore, "the body of every person is composed of the same materials commonly found in the earth." ; this statement is false because the human body is composed of various elements that are not commonly found in the earth.For more such questions on human body , click on:
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when high levels of plasma calcium occur, the nurse is aware that the following hormone will be secreted:
Answers
When high levels of plasma calcium occur, the nurse would be aware that the hormone calcitonin is typically secreted.
Calcitonin is a hormone produced by the thyroid gland in response to elevated levels of calcium in the blood. Its primary function is to regulate calcium homeostasis by decreasing the concentration of calcium in the bloodstream. Calcitonin acts on the bones, kidneys, and intestines to reduce calcium levels through several mechanisms:Inhibition of bone resorption: Calcitonin inhibits the activity of osteoclasts, cells responsible for breaking down bone tissue. By suppressing osteoclast activity, calcitonin helps to prevent the release of calcium from bones into the bloodstream.Increased calcium excretion: Calcitonin promotes the excretion of calcium by the kidneys, reducing reabsorption and enhancing its elimination through urine.
By exerting these effects, calcitonin helps to regulate and lower plasma calcium levels when they are elevated. It works in opposition to another hormone called parathyroid hormone (PTH), which increases plasma calcium levels when they are low.
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Which lung value remained relatviely unchanged when comparing a patient with an acute asthma attack, acute asthma attack with inhaler, and normal?
Answers
IRV (inspiratory reserve volume)
IRV (inspiratory reserve volume) lung value remained relatively unchanged when comparing a patient with an acute asthma attack, acute asthma attack with inhaler, and normal.
What is IRV?The amount of air that can be forcibly inhaled following a normal tidal volume is known as the inspiratory reserve volume (IRV). Deep breathing necessitates the utilization of IRV, which is typically maintained in reserve. 1900-3300 ml is the typical adult value.What brings to severe asthma attacks?Exposure to an allergen, such as dust mites, cockroaches, grass or weed pollen, or animal dander, can cause an asthma attack. Other frequent triggers are strong aromas like perfume and irritants in the air like smoke or chemical fumes.How does inspiratory reserve volume work?The extra volume of air that can be exhaled following a typical exhalation is known as the expiratory reserve volume (ERV). It is the amount held in reserve that may be exhaled in excess of what is typical. In contrast, the additional volume of air that can be inhaled after a typical inhalation is known as the inspiratory reserve volume (IRV).To learn more about inspiratory reserve volume visit:
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The agricultural surplus necerssary to emerging civilizations in the Andes valleys was based on a combination o agriculture and marine resources. True or false?
Answers
The given statement "In the Andes valleys, the agricultural surplus necessary for emerging civilizations was indeed based on a combination of agriculture and marine resources" is True. These two elements played a crucial role in supporting the growth of complex societies in the region.
Agriculture was essential for providing staple crops, such as potatoes, maize, and quinoa, which were grown on terraced fields in the Andean highlands. The advanced agricultural techniques employed by the civilizations, including irrigation systems, allowed for increased crop yields and the ability to support larger populations.
Marine resources also played a significant role in the sustenance of these civilizations. The rich fishing grounds along the Pacific coast, known as the Humboldt Current, provided an abundance of fish and shellfish, such as anchovies and mollusks. These resources supplemented the diets of the people and contributed to their overall health and well-being.
The combination of agriculture and marine resources enabled the Andean civilizations to generate a surplus of food, which supported the development of complex social structures, political systems, and cultural advancements. This surplus allowed for the growth of large urban centers, specialized labor, and the development of trade networks between the coastal and highland regions. As a result, these civilizations thrived, leaving behind an impressive legacy of achievements in areas such as architecture, textiles, and metalworking.
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