Amphipathic phospholipids arrange themselves into a(n) ______ to form the plasma membrane multiple choice question.

The amount of the 30 gram-sample that will remain after 270 years is 6.61 grams

We'll begin by obtaining the number of half lives that has elapsed. This can be obtained as follow:

n = t / t½

n = 270 / 99

n = 2.8125

The amount remaing can be obtained as follow:

N = N₀ / 2^n

N = 30 / 2^2.8125

N = 6.61 grams

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It is not necessary for every members of a particular species to must reproduce in order for the species to survive.

For a given species  to survive, not every individual needs to be able to reproduce. because as long as some of the individuals are reproducing the species number will be maintained enough so that it could survive.

Take homo sapiens (Humans) as an example. Many males and females worldwide are sterile and unable to procreate, yet the human species is still thriving.

Also, if we take ants and bees as an example it has a particular cast called reproductive caste which is able to reproduce and all other individuals have their certain assigned duties and still the queen only produce such huge amounts of eggs that they are still surviving.

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The correct answer is pH of 5.5 Increasing the H3O+ by 10 fold decreases the pH by 1 unit so an increase of 100 would decrease the ph by 2 units .

When the concentration of hydrogen ions in a solution increases by a factor of ten, the pH of the solution decreases by one. The acidity of a solution is thus defined as its hydrogen ion concentration [H+] expressed as the solution pH. The pH of a solution is more precisely defined as the negative log of the hydrogen ion concentration: pH=log[H+].

Most natural changes occur as a result of interactions with surrounding rock (particularly carbonate forms) and other materials. pH can also change as a result of precipitation (particularly acid rain) and wastewater or mining discharges 13. Furthermore, CO2 concentrations can affect pH levels.

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You suspect that changes in the hormone levels of a bird are causing it to sing more frequently. this is an example of a(n):

proximate hypothesis

What is a proximate hypothesis?

An event that is nearest to, or directly accountable for, creating some observed effect is referred to as a proximate cause. This contrasts with a higher-level ultimate cause (also known as a distal cause), which is typically regarded as the "real" cause of an event.

 Ex: What caused the ship to sink? A breach beneath the waterline allowed water to enter the hull, making the ship denser than the water that was supporting it, which prevented it from remaining afloat. The ship's collision with a rock, which tore a hole in its hull, was the ultimate reason.

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The head of each femur fits into the deep acetabulum of each os coxae, helping to stabilize the joint.

Acetabulum- The concave surface of the pelvis is known as the acetabulum, sometimes known as the cotyloid cavity. The hip joint is created when the head of the femur connects to the pelvis at the acetabulum.

Os Coxae- The hip bone, also known as the os coxae, innominate bone, pelvic bone, or coxal bone, is a massive, atypical bone that is compressed in the middle and extended above and below. The ilium, ischium, and pubis are its three component components in certain animals, such as humans before puberty.

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Answer: peptide bonds

Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain. Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

Explanation:

Answer:

peptide bonds

Explanation:

Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain. Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

Legally, any medical assistant who is working under a doctor's direction can administer injections. False: Even when given under a doctor's supervision, medical assistants cannot provide injections in all states.

A physician, often known as a doctor of medicine, frequently focuses on non-surgical care for patients' ailments. That's not to argue that becoming a doctor isn't useful most specialties have a distinctive variety of procedures related to them.

A doctor with a medical degree is referred to as a "physician" in general. Physicians investigate, diagnose, and treat illnesses and injuries in an effort to preserve, promote, and restore health. Typically, a doctor has six fundamental skills patient care.

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Answer:

B i got it right on mine but yet again it could be different for you but I would say B

Since 238,900 is greater than 1, the decimal will move to the left and my exponent will be 5 as seen in 2.389 × 10⁵.

Exponentiation is the process of calculating a power by multiplying together a number of equal factors, where the exponent specifies the number of factors to multiply.

In mathematics, the exponent is the number by which a value (called the base) is said to be raised to a power in exponentiation: for example, the 3 in 2³ = 8.

According to this question, since 238,900 is greater than 1. The decimal will move to the left and the exponent will be 5 as follows:

2.389 × 10⁵

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A bacterium engulfed by a white blood cell through phagocytosis will be digested by enzymes contained in vacuoles secretory (option A).

Phagocytosis is the form of endocytosis in which a cell incorporates a particle by drawing the particle into a vacuole of its cytoplasm.

The white blood cell, also known as the leucocytes are the defense of the body as they help fight against foreign substances which they attack by phagocytosis.

Since the foreign bodies are pulled into the vacuole, hence, it can be said that bacterium engulfed by a white blood cell through phagocytosis will be digested by enzymes contained in vacuoles secretory.

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The difference between a hypothesis and a theory is a hypothesis is a possible explanation of a single event based on observation, while a theory is a unifying explanation based on many experiments and observations.

A hypothesis is a supposition or forecast of an event that can be seen and assessed by an investigation or piece of scientific research. A hypothesis, on the other hand, is a plausible explanation for a phenomenon that may be examined by science.

When a strengthened hypothesis overcomes all challenges and establishes itself as the greatest logical explanation for a certain phenomena, it becomes a theory. The hypothesis may need to be changed or even abandoned if there is a sufficient amount of data that either contradicts the hypothesis or supports a more convincing alternative explanation.

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Answer:

Prior to the work of Carl Woese blank, scientists did not distinguish between members of the archaea and the bacteria.

Explanation:

Prokaryotes, which comprise two very different species i-e bacteria and archaea, may be found practically everywhere, including within human bodies as well as on every surface of the dwellings. Some inhabit habitats that are too harsh for other types of life, such as the warm pores on the seafloor. Prokaryotes are everywhere, yet they may be challenging to find, quantify, and categorize. Only a small portion of the prokaryotic on the planet that are predicted to exist are represented by those that we now learn about. In reality, in the environment of prokaryotes, the concept of a "species" itself becomes complex. Prokaryotes, meanwhile, are separated into two different branches, or lines of derivation, known as Archaea and Bacteria, according to research done in the mid-1970s by biologist Carl Woese.

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A property that is common to all microbial cells is evolution.

The term microbial cells include wide variety of micro organisms which can be bacteria, virus, fungi, algae, protist etc. The process of evolution is an important process for all the living organisms in order to survive. The evolution includes variation in genetic data that is evident in the form through mutation, transfer and reduction.

Communication between cells is common in bacteria and is a well-researched topic by scientists. The term for the process is quorum sensing and is responsible for biofilm formation, which causes problems in health and other industries. Motility and genetic exchange is not common in various organisms.

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The two major approaches used in taxonomic classification of microorganisms that have been isolated and grown in pure culture are termed classical and molecular.

Taxonomic classification is the branch of science that divides and distributes all the living organisms into certain groups in a hierarchical order. Both living and extinct organisms have been classified into those groups, known as taxon. These are: Kingdom, Phylum/Division, Class, Order, Family, Genus, Species.

The molecular approach of taxonomy help in establishing the relations between different organism. It helps in identifying the ancestors as well as evolutionary history of an organism. Various molecular techniques are used for this identification.

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Forming the cell walls of stems, leaves, and roots, the Cellulose compound is the primary structural constituent of plant tissues. the correct answer is option(d).

The polysaccharide cellulose, an organic molecule with the formula n, is made up of a linear chain of several hundred to many thousands of D-glucose units that are covalently bonded. Green plants, numerous types of algae, and oomycetes all have basic cell walls that contain cellulose as an essential structural element.

Because it gives the plant cell wall stability and mechanical and tensile strength, cellulose is crucial for plant cell walls. The maintenance and control of plant cell growth and development are based on the configuration of microfibrils (cellulose). The fundamental structural element of the cell wall, cellulose, is largely responsible for its mechanical strength. Cellular activity is influenced by the positioning of cellulose microfibrils within the cell wall.

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Answer:

0.00305

Explanation:

Hope it helps!!!

;}

Answer:

0.00305

Explanation:

Given the following question:

Since the exponent is negative, we move the decimal point to the LEFT three times.

3.05 * 10^-3
Exponent is negative:
.0.0.3.05
= 0.00305

Which means your answer is "0.00305."

Hope this helps.

Yeasts, bacteria, viruses are generally included in the field of microbiology

The study of various living things that are not visible to the eye, such as bacteria, fungi, and other tiny organisms, is known as microbiology. Despite being little, these organisms are the foundation of all life on earth.

Famous microbiologists like Jenner, who developed a vaccine against smallpox, Fleming, who discovered penicillin, who discovered a connection between Helicobacter infection and stomach ulcers, and zur Hausen, who discovered a connection between the papilloma virus and cervical cancer, have made some of the most significant discoveries that have supported modern society.

Maintaining food, water, and energy security for a healthy people on a habitable earth is only one of the many present global objectives and concerns that microbiology research has been and continues to be crucial in addressing.

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Cognitive-behavioral and learning theories are based on the idea that sexual behaviors are influenced by: Positive and negative feedback that people receive when they express sexual behaviors.

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Answer:

Functional groups containing Oxygen and Nitrogen atoms usually increase the polarity of a molecule.

Explanation:

Oxygen is one of the most important elements in the periodic table. Its atomic number 8 and atomic mass is 16. About 1772, a Swedish scientist named Carl Wilhelm Scheele made the discovery of oxygen. Some compounds like alcohol, water, carboxylic acids, ketones and many others contain oxygen which make them polar.  Among all these compounds water is the most important oxygen containing compound.

The scientific name for nitrogen is N, and it is a flavorless and colorless element. The ground beneath our feet contains nitrogen, as does the water that we drink as well as the air we inhale.  Atmosphere contains about 78% of Nitrogen.   Nitrogen containing compounds are ammonia, nitric acid and many others. Both oxygen and nitrogen make a compound polar.

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In the stomach, food processing continues and secretions from stomach glands aid the initial digestion of Proteins

Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs

Pepsin would be a stomach enzyme used to break down proteins in food that has been consumed. Pepsin is produced by the main cells of the stomach as pepsinogen, an inactive zymogen. The stomach's lining's parietal cells also secrete hydrochloric acid, which reduces the pH of the stomach. Pepsin is activated at a pH between 1.5 and 2.

Once a protein source enters the human stomach, it is broken down into smaller molecules called amino acids by the stomach's hydrochloric acid as well as proteases enzymes.

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Two neurosurgeons were able to reduce seizure activity in epileptic patients by severing the: corpus callosum

The epilepsy is a brain disease associated with neurological disorders. Patients suffering from this disease present multiple repetitive and unpredictable seizures that could cause physical damage to the patient.

The general cause of epilepsy may be due to a health condition, an injury affecting the brain, or even an unknown (idiopathic) cause. The followings are common causes of epilepsy:

It is the part of the brain that acts like a bridge linking the two cerebral hemispheres.

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Positive ions are formed when electrons are lost, for example, Potassium ion, K⁺ is formed when a Potassium atom, K losses one electron. A neutral atom of Potassium (K) has 19 protons and 19 electrons, and a positive ion of Potassium (K⁺) has 19 protons and 18 electrons.

Ions are charged particles formed when neutral atoms loss or gain electrons. When electrons are lost, positively charged particles called cations are formed, and when electrons are gained, negatively charged particles called anions are formed. Electropositive elements are more likely to form cations. Potassium (K) losses one electron in order to obtain a stable configuration, forming Potassium ion (K⁺).

For all neutral atoms, the number of protons is always equal to the number of electrons. The number of protons is the same as the atomic number. Potassium (K) has an atomic number of 19, thus it has 19 protons. Since Potassium (K) atom is a neutral atom, it will also have 19 electrons.

However, Potassium ion (K⁺) has lost one of its electrons, so it will have 18 electrons instead of 19. Therefore, Potassium (K) has 19 protons and 19 electrons, while Potassium ion (K⁺) has 19 protons and 18 electrons.

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(P high - P low) is re-established to optimize the variable(s) of Fick's law.

According to Fick's law of diffusion, particles subject to random thermal motion have a tendency to move from an area of higher concentration to an area of lower concentration. Fick's diffusion law, which asserts that the diffusion flow is proportional to the concentration gradient, mathematically describes three-dimensional diffusion.

The diffusion process is explained by Fick's law of diffusion (movement of molecules from higher concentration to lower concentration region). Adolf Fick first explained Fick's Law of Diffusion in 1855. Normal diffusion, often known as Fickian diffusion, is a diffusion process that complies with Fick's rules. An abnormal diffusion process also referred to as non-Fickian diffusion, defies Fick's rules.

According to Fick’s law of diffusion,

“The molar flux due to diffusion is proportional to the concentration gradient”.

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Seth made a table comparing the functions of different physical structures

Organs in flora

Your frame consists of organ systems, including the digestive gadget, fabricated from man or woman organs, including the belly, liver, and pancreas, which work collectively to carry out a positive characteristic (in this situation, breaking down and absorbing meals).

those organs, in flip, are made of various kinds of tissues, which are companies of cells which paintings collectively to perform a particular activity.

for instance, your belly is manufactured from muscle mass to facilitate movement and glandular tissue to secrete enzymes for chemical breakdown of meals molecules. those tissues, in turn, are made of cells specialized in shape, length, and factor organelles, such as mitochondria for energy and microtubules for motion.

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Answer:

The sympathetic nervous system (SNS) is the division of the autonomic nervous system arouses the body and mobilizes its energy in stressful situations.

Explanation:

The SNS is a part of the  central nervous systems  which are responsible for producing reflex cardiovascular system modifications as well as localised changes (such sweating in reaction to a rise in body temperature). The defence response, which is a broad rapid reaction, is produced when the SNS is fully engaged under stress. Large amounts of adrenaline are released from either the adrenal gland during this response, which is also characterized by a rise in cardiac function, heart rate, as well as skeletal muscle dilatation as well as pupillary dilation, bronchial dilatation, and piloerection. The ultimate result is to have the person ready for possible danger. Together with additional neurological or hormonal reactions to stress, such as increased corticotropin as well as cortisol release, the SNS acts.

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When movement of Na ions down their concentration gradient drives the transport of other substances across the cell membrane, it is called Secondary active transport.

Secondary active transport is responsible for transporting sodium ions, and other compounds into the cell. When sodium ion concentrations build pressure outside of the plasma membrane due to active transport, an electrochemical gradient is produced which force the movement of sodium ion inside of the cell. Secondary active transport refers to the type of transport of a solute in the direction of increasing electrochemical potential which leads to facilitated diffusion of ions in the direction of lower electrochemical potential.

So we can conclude that When movement of Na ions down their concentration gradient drives the transport of other substances across the cell membrane, it is called Secondary active transport.

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(c)A reconstituted medication can last for 10-14 days after reconstitution.

Reconstitution is the process of adding medication powder to a solvent to dissolve it and form a solution. It is performed mostly in Pharmacy but some medications needed to be reconstituted immediately before administration.

After a medication has been reconstituted, it can only be stored for a short period before it can no longer be useful. The length of time a liquid medication, or any medication, can be stored safely is known as the shelf life of medication. The length of medication once reconstituted is from several hours to 14 days max.

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Option C: A reconstituted medication can last for 10-14 days after reconstitution.

Reconstitution is the process of adding medication powder to a solvent to dissolve it and form a solution. It is performed mostly in pharmacy but some medications needed to be reconstituted immediately before administration.

After a medication has been reconstituted, it can only be stored for a short period before it can no longer be useful. The length of time a liquid medication, or any medication, can be stored safely is known as the shelf life of medication. The length of medication once reconstituted is from several hours to 14 days max.

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Urea makes lungfish tissue hypoosmotic to the pool. Small stagnant pools do not provide enough water to dilute the toxic ammonia. Lungfish are freshwater vertebrates of the Dipnoi order. Lungfish are most recognized for preserving ancestral Osteichthyes features, such as the capacity to breathe air.

Ancestral ammonia structures, such as the existence of lobed fins with a well-developed internal skeleton. Lungfish are the tetrapods closest surviving relatives. Only six species of lungfish are known to exist today, and they are found in Africa, South America, and Australia. Lungfish have been found in abundance since the Triassic period, according to the fossil record.

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The term used to denote foods that contribute energy but lack protein, vitamins, and minerals is empty calorie foods.

There are a lot of packaged goods in the grocery store that are high in empty calories. This indicates that they are not very nutritious. Instead, they primarily provide your body with additional carbohydrates and solid fats, which can result in weight gain and nutrient inadequacies.

Empty calories are those that are produced by processed oils, added sugars, and solid fats. Carbohydrate-based treats like cakes, cookies, muffins, donuts, granola bars, and more are among them. sweet beverages, such as fruit juice, soda, and energy drinks.

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