in the multiple tube fermentation test, which part of the test definitively shows that fecal coliforms are present in the sample? A. the presumptive testB. the confirmed testC. the completed test

The alternative complement route can be triggered by C3 hydrolysis, foreign particles, infections, or injured cells, but the conventional complement pathway normally requires antigen—antibody complex (immune complexes) to activation (specific immune response).

Complementary receptor 1 (CR1) on CD35: lectin-based, conventional, and alternative pathways. The transmembrane glycoprotein CD35 works as a co-factor to factor I in the breakdown of C3b and C4b and promotes the decay of C3/C5 step down transformer in both the conventional and alternative pathways. A chain of events that activates the lectin, alternative, and classical pathways results in the membrane assault complex. The immune system includes them. For pathway start, each has its own set of proteins. One of three complements routes that opsonize and eliminate infections is the alternative pathway.

Learn more about pathway

https://brainly.com/question/28187713

#SPJ4

Answer:

Move molecules into or out of cells of the body

Explanation:

Move molecules into or out of cells of the body

Answer:

i think the partition will be occur

Answer:

the answer is C

Explanation:

Mutations are genetic changes in the DNA sequence of the genome in a particular organism. Mutations are caused by adding one or more extra nucleotides into the DNA (i.e. insertions), deleting nucleotides (i.e. deletions), or replacing nucleotides (i.e., substitutions). Due to the diverse nature of mutations, it is expected that they have different effects on the gene product (i.e., the resulting protein). For example, a deletion or an insertion, which are collectively are referred to as 'indels' mutations, may generate frameshift mutations that shift the way the DNA sequence is read. Moreover, if a nucleotide letter is written backward, it doesn't change the final product (i.e., the nucleotide sequence), which is represented in the example with the C option.

The adaptation of significantly reducing the rate of metabolism in the European salamander, Proteus anguinus, evolved through natural selection as individuals with this trait had higher survival rates and reproductive success in environments with limited food supply.

The process of natural selection led to the adaptation of the European salamander, Proteus anguinus, to significantly reduce its rate of metabolism when food is scarce. Natural selection is the mechanism by which individuals with advantageous traits for their environment have higher survival rates and reproductive success, leading to the increased prevalence of those traits in subsequent generations.

In the case of the salamander, the limited food supply in underground caves created a selective pressure favoring individuals that could conserve energy during periods of food scarcity. Salamanders with the ability to reduce their metabolic rate had a higher chance of survival as they could survive longer without food, making them more likely to reproduce and pass on this adaptive trait to their offspring.

Over time, through the process of natural selection, the individuals with the ability to lower their metabolic rate became more prevalent in the salamander population. This adaptation allowed them to better cope with the limited food supply in the caves, maximizing their chances of survival and reproductive success.

Therefore, the ability to significantly reduce the rate of metabolism in response to scarce food evolved in the salamander population as a result of natural selection, enabling them to thrive in their underground cave habitats.

Know more about Natural selection here:

https://brainly.com/question/23929271

#SPJ8

Answer:

skin colour, eue colour, sickle cell anaemia etc

Explanation:

These are traits that aren't fully transmitted from the parent's gene to that of the offspring

The most likely age-related change in the eye responsible for Hilda's limitation of not being able to see well when driving at night is the lens becoming less elastic.

This change affects the eye's ability to focus properly and adjust to different distances, leading to difficulties with night vision. As we age, various changes occur in the eye that can affect vision. Among the given options, the most likely change responsible for Hilda's limitation is the lens becoming less elastic. The lens of the eye plays a crucial role in focusing incoming light onto the retina, allowing us to see objects clearly at different distances. With age, the lens gradually loses its elasticity and flexibility, making it more difficult for the eye to adjust its focus. This condition is known as presbyopia, and it commonly affects individuals in their 40s and beyond. When the lens becomes less elastic, it becomes harder for Hilda's eye to focus on objects, especially in low-light conditions such as driving at night. This reduced ability to accommodate to different distances can result in blurry vision and difficulty seeing clearly. Hilda may require additional corrective lenses, such as glasses or contact lenses, to compensate for this age-related change and improve her vision, particularly for nighttime driving. It is essential for her to consult an eye care professional who can assess her specific needs and provide appropriate recommendations for addressing her visual limitations.

learn more about contact lenses here: brainly.com/question/10921004

#SPJ11

Answer:

The quote refrences to the fragility of our enviorment and how that balance is to not be disrupted. That no matter how small,every detail affects that balance and is not to be tampered with. It is the same in the food chain,the elimination of even the smallest of species can have devastating effects on an ecosystem. That is why it is important to preserve resources and respect all life. an example of that balance being disrespected in the movie would be the scene where the once beautiful valley was barren and dry due to the hyenas destroying and using up all of the resources, thus destroying the balance of life and bringing famine to their lands.

Explanation: The circle of life man

When a balance is not respected then it leads to destruction of the whole ecosystem not a single organism.

This quote is related to the concept of the food web, pyramid of energy, and the pyramid of numbers because every organism is dependent on other organism for its survival. If that organism is eliminated from the ecosystem, then the organism that feeds on it also die.

If this balance is not respected and maintained then the whole ecosystem is destroyed because every organism is dependent on othe organism.

So we can conclude that when a balance is not respected then it leads to destruction of the whole ecosystem not a single organism.

Learn more about balance here: https://brainly.com/question/2261596

The anesthetic drugs attach to the sodium channels of the membrane, which inhibits the movement of sodium ions across the cell membrane. Sodium channels play a crucial role in the propagation of nerve impulses, which is important for the transmission of pain signals.

When a local anesthetic drug attaches to the sodium channel, it blocks the influx of sodium ions into the cell, preventing the depolarization of the neuron and thus, preventing the transmission of pain signals. This leads to a loss of sensation in the area where the anesthetic was administered. Local anesthetics are commonly used for minor surgical procedures, dental work, and diagnostic tests to provide pain relief without the need for general anesthesia. It is important to note that local anesthetics can have side effects and complications, including allergic reactions, nerve damage, and toxicity if administered in excessive amounts. Therefore, it is essential that local anesthetic drugs are administered by trained medical professionals in a controlled and monitored environment.

learn more about anesthetic here.

https://brainly.com/question/29727409

#SPJ11

Answers:

46 chromosomes will be found in such division.

Explanation:

Mitosis is a type of cell division in which a parent cell divided into two daughter cells and each daughter cells carries the same number of chromosomes as the parent cells and the daughter cells are genetically identical to the parent cells. This type of cell division occur in protists, fungi and plants.

If the parent have 46 chromosomes, each daughter cell will have 46 chromosomes.

Each haploid cell will have 46 chromosomes.

Answer: D because the lemur sticks it’s middle finger in the tree to eat

Explanation:

Just took test

Adaptation is the process of survival to the environment and the surroundings. The development of the special adaptation is due to the food sources that are hard to find.

Adaptations are the specialized changes that an organism acquires for survival and reproduction in altered conditions so that their generations can be maintained.

The lemurs adapted to the thin and long middle fingers and teeth so that they can tear open and reach the insects living in the barks that are the food source for them.

Therefore, option D. hard sources of food led to the special adaptation.

Learn more about special adaptation here:

https://brainly.com/question/13732228

"B" stands for "big" in the ABCDs of malignant melanoma detection. This statement is true.

Malignant melanoma is a type of skin cancer that develops in melanocytes, which are pigment-producing cells in the skin. This condition is known to be one of the most aggressive and deadly forms of skin cancer and can spread rapidly to other parts of the body if not treated promptly.The ABCDs of malignant melanoma detectionThe ABCDs of malignant melanoma detection are a set of guidelines used to identify the early signs of skin cancer. Each letter of the acronym stands for a specific aspect that helps identify the condition. The letters stand for:A - AsymmetryB - BorderC - ColorD - DiameterB stands for "big" in the ABCDs of malignant melanoma detection.

This refers to the size of the mole or skin lesion. A lesion that is larger than 6mm (1/4 inch) in diameter is more likely to be malignant than a smaller lesion. The other letters of the acronym are equally important in detecting malignant melanoma, and all four should be considered when evaluating a mole or skin lesion.

To know more about malignant melanoma  click on below link :

https://brainly.com/question/16989624#

#SPJ11

Answer:

94 million liters.

Explanation:

260*1000=260,000

260,000*365=94,900,000

According to the research, the correct answer is Option C. The statement "They cannot transfer information from one hemisphere to another" is TRUE about split-brain patients.

In general, it is a brain excision surgery, which consists of removing the corpus callosum, which creates a disconnection between the right and left hemispheres.

In this sense, the corpus callosum is an internal area of the brain that is extremely important, since it is the structure that serves as a bridge for the two cerebral hemispheres to communicate actively and for which all the functions of the brain can be carried out.

Therefore, we can conclude that according to the research, in split-brain patients the area of the brain called the corpus callosum, which is made up of a group of neurons dedicated to the union of the hemispheres, has been cut.

Learn more about split-brain here: https://brainly.com/question/29753141

#SPJ1

The secretion is cerumen, a material produced by the cells that produce glands that is waterproof.  (Response B)

It is not necessary. The ear may self-clean. There is no requirement for ongoing maintenance. I'll think twice before inserting swabs to remove or stop the accumulation of earwax in my ears.

If your ears create too much earwax or if it is not entirely eliminated, it can build up and impede your ear canal. Earwax blockages usually occur when people attempt to remove earwax themselves using cotton buds or even other things. This frequently only pushes wax deeper into the ear, rather than removing it.

To know more about Cerumen visit:

https://brainly.com/question/15874377

#SPJ4

Explanation:

Form and function are intimately related in human cells. The shape and structure of cellular components are often specifically designed to carry out their respective functions effectively. For example, red blood cells are disc-shaped with a concave center, which increases their surface area for efficient oxygen and carbon dioxide exchange. Neurons have long, branching extensions called dendrites and axons, allowing them to transmit electrical signals over long distances.

Epithelial tissues are composed of closely packed cells that form protective barriers and linings in the body. They cover external surfaces (such as the skin) and line internal organs and cavities (such as the digestive tract). In contrast, muscle tissues consist of cells that are specialized for contraction and movement. There are three types of muscle tissues: skeletal muscle, responsible for voluntary movements; cardiac muscle, found in the heart; and smooth muscle, which controls involuntary movements in organs like the intestines.

Epithelial tissues primarily function in protection, absorption, and secretion. They have tightly packed cells with minimal extracellular matrix. In contrast, muscle tissues are specialized for contraction and movement. They contain long, elongated cells (muscle fibers) that can generate force. Skeletal muscle is striated and allows for voluntary movements, while cardiac and smooth muscles have different structures and functions specific to their respective roles in the body.

In summary, the relationship between form and function is evident in human cells. Cellular structures are designed with specific shapes and arrangements to perform their functions efficiently. Epithelial tissues provide protective barriers and linings, while muscle tissues enable contraction and movement. Understanding the relationship between form and function helps us appreciate the intricate design of cells and tissues in the human body.

The mature reproductive or sex cell known as a gamete is capable of fusing with another haploid reproductive cell to create a diploid zygote and has a haploid number of chromosomes (i.e., 50% of the genetic material or only one set of dissimilar chromosomes).

The fusion (or combining) of two gametes, specifically a male and a female gamete, results in the zygote. Fertilization is the process by which two gametes combine to form a zygote.

One of the gametes is typically larger and non-motile, which is characteristic. It is also referred to as an ovum or an egg cell. The second gamete cell is smaller and motile. It is also known as a sperm cell or a male gamete. Each human gamete has 23 chromosomes, and their fusion produces an individual.

To know more about gametes click here:

https://brainly.com/question/7648924

#SPJ4

This statement is false because the breaking of the high energy bond in ATP does not release energy; rather, it consumes energy.

The high energy bond in ATP is formed when three phosphate molecules are bonded together, forming a molecule called adenosine triphosphate (ATP). This bond is highly stable and requires a large amount of energy to break.

When the bond is broken, the energy stored in the bond is released as heat and can be used to power processes in the body, such as muscle contraction. However, breaking the bond requires an input of energy, rather than releasing energy as this statement suggests.

This energy comes from the breakdown of carbohydrates and fats, or from the breakdown of other molecules such as creatine phosphate.

To learn more about phosphate visit :

https://brainly.com/question/28489806

#SPJ4

Answer:

There are multiple lines of evidence that provide support for common ancestry and evolution; this would be homologous features of anatomy and embryology and fossil records.

In comparative anatomy, there are many similarities between species because all life is related. Homology is similarities seen because of the ancestry of features or genes in an organism. Similarities can show descent from common ancestors and similarities can be seen in body structures, development, and DNA. Homologous structures are similar traits found in two different species that are the result of having a common ancestor. These structures are similar but may have different functions. An example of this might be the homologous structures in the limbs of humans, cats, whales, and birds. And then there are analogous structures, which similarly is that the structure of different species are similar because the trait is advantageous, not because they are related. An example of this is sharks and dolphins having similar fins. Along with anatomy is Embryology. Different species can have similar embryos because they come from a common ancestor. They may start with the same developmental plan but change drastically as they grow up. An example of this is seen in the early stages of development between fish and chicken embryos.

Next up, the fossil record provides evidence that supports common ancestry and evolution.  The fossil record provides us with visual evidence for evolution. The fossil record directly allows us to pinpoint if there are any similar structures amongst organisms and see if there are any vestigial structures from ancestors that remain in organisms that still roam today. The fossil record depicts evolutionary change over the past four billion years, which can be seen through transitional forms, increasing complexity of life, and geographical distribution. Transitional forms are fossils that show intermediate states between an ancestral species and its evolutionary descendants. Increasing complexity is seen as life on earth becomes more complex. That and geographic distribution which has been studied closely and found that the continents have moved over time and that the fossil record reflects this movement. Fossils of different animals can be found on different continents around the world due to continental drift.

Explanation:

The various pieces of evidence that support common ancestry are homologous organs, fossil records and embryological studies.

The phrase "common descent" in evolutionary biology refers to a particular group of species' shared ancestry. The creation of new species from an original population is a component of common descent. Two creatures are considered to be closely related if they have a recent common ancestor.

In contrast, molecular genetic techniques can also be used to establish shared ancestry from a single universal ancestor of all living things. Natural selection and other factors, such geographic isolation, are considered to have contributed to many speciation episodes during this development from a universal common ancestor.

According to the common ancestry idea, every living thing descended from a single progenitor. Hence, the Theory of Common Descent contributes to our understanding of why traits in species living in different geographic regions vary, why some traits are highly conserved across broad animal classifications (such as vertebrates or tetrapods), why seemingly unrelated species (such as birds and reptiles) share hereditary physical and genetic traits, and why successfully adapted organisms typically have more offspring.

Therefore, embryological studies, fossil studies and homologous organs can help in the study of common ancestry.

Read more about common ancestry, here

https://brainly.com/question/1358940

#SPJ5

Answer:

biological community of interacting organisms and their physical environment

Answer:

See Below.

Explanation:

The key word here is net. The net movement has reached zero when a system is in equilibrium but there are still motion's going back and forth due to statistics and just random brownian motion.

Think of it this way, if there are 100 people walking forwards in a crowd but 2 are moving against the crowd, the net movement is still forwards because the bulk of people are going in that direction. However, there are still 2 people moving against.

Same here, if we are talking about a diffusion, let's say in the case of osmosis, if most of the solute is moving across a membrane then we'd say its net direction is that way but that doesn't mean that there aren't processes happening in the other direction. Water molecules in osmosis mostly diffuse, chemically speaking (because you can say this biologically in a different way), from the probability of water molecules colliding with each other and passing the membrane so even if there is a net movement in a certain way their random motion can make them go to the other side just as well. If the fact that motion stops at equilibrium were the case a lot of systems, both chemical and biological, would not exist as we know it.

Think net = bulk NOT total or entire.

When the net movement is Zero at equilibrium ; An insignificant number of molecules are still moving below

When diffusion reaches equilibrium most of the molecules moving from the areas of higher concentration  to areas of lower concentration will stop moving, but a negligible number of molecules will continue to move due to  random Brownian motion.

When we say the net movement of molecules at equilibrium is zero it is because majority of the molecules have stopped moving and not all the molecules therefore there will be an insignificant movements of molecules still occuring.

Hence we can conclude that When the net movement is Zero at equilibrium ; An insignificant number of molecules are still moving below

.

Learn more : https://brainly.com/question/18980315

Structural polysaccharides is most directly responsible for it. It is built with β-1,4-glycosidic linkages.

The most prevalent type of carbs in food is a polysaccharide. They are long-chain polymeric carbohydrates made up of glycosidic connections that connect monosaccharide units.

The β-1,4-glycosidic connections that make up structural polysaccharides are extremely resistant to hydrolysis. Structural polysaccharides are particularly resistant to decay because β-1,4-glycosidic bonds are challenging to break.

Learn more from β-1,4-glycosidic from:

https://brainly.com/question/5264967

#SPJ4

Answer:110

Explanation: 220 x .5

Lungs are not considered radiopaque.

Lungs are not considered radiopaque. Radiopaque refers to structures or materials that block the passage of X-rays and appear white or dense on radiographic images. Lungs, on the other hand, are mostly made up of air and do not absorb X-rays well, making them radiolucent (appearing dark on a radiograph). Lungs are radiolucent, meaning they allow X-rays to pass through and appear darker on images due to their air content.

Lungs are not radiopaque, but rather radiolucent, allowing X-rays to pass through them.

To know more about radiopaque, click here

https://brainly.com/question/31826153

#SPJ11

1) Planets move in elliptical orbits with the sun at one focus.

2) Planets speed up when they are closer to the sun because of the sun's gravitational pull.

Answer:

biodegradable and biodegrade with a lower metal if female culture there are differences of male culture and female cultures

Answer:

A) polar

Explanation:

Polar molecules contains  partial positive and partial negative charge as in all polar molecules two atoms have unequal sharing electron. Due to unequal sharing of electrons, one atom that attracts valence electrons strongly gains positive charge and other gain negative charge.

For example water, water is a polar molecule having partial negative and partial positive charge because the oxygen atom in water attracts electrons more strongly than the hydrogen atoms.

Hence, the correct answer is "A) polar".

Square, the financial services company, has evolved significantly based on actors in the microenvironment. The microenvironment consists of factors and actors that directly impact a company's operations and performance. In the case of Square, some key actors that have influenced its evolution include customers, competitors, suppliers, and intermediaries.

Customers: Square's focus on small businesses and individual sellers has shaped its product offerings and services. By understanding the needs and preferences of its target customers, Square has developed innovative payment solutions, including point-of-sale systems and mobile payment options, to cater to their specific requirements.

Competitors: The competitive landscape has driven Square to continually innovate and differentiate itself. Rival companies in the payment industry have spurred Square to improve its offerings, enhance user experience, and expand its product portfolio. This competition has resulted in the evolution of Square's services to stay ahead in the market.

Suppliers: Square relies on various suppliers, such as hardware manufacturers and technology providers, to ensure the smooth functioning of its payment systems. Collaborating with reliable suppliers and maintaining strong relationships with them has allowed Square to access the latest technologies and stay up to date with industry trends.

Intermediaries: Square interacts with intermediaries like financial institutions and payment networks, which facilitate the processing of transactions. Building strategic partnerships and integrating with these intermediaries has enabled Square to expand its reach, enhance its capabilities, and provide seamless payment experiences for its customers.

In summary, Square's evolution has been shaped by factors within its microenvironment. By closely considering the needs of customers, responding to competition, leveraging supplier relationships, and collaborating with intermediaries, Square has adapted and grown to become a prominent player in the financial services industry.

Know more about microenvironment here:
https://brainly.com/question/13273608

#SPJ8

The energy from the turning bicycle wheel spins the turbine which generates energy. The fluorescent light bulb converts this energy into two new forms: a lot of energy and very little energy.

The question is incomplete as the system is not shown but I will try to help you the much I can. First of all, this question deals with the idea of energy transformation. We must note that energy is neither created nor destroyed but can be transformed from one form to another.

The system ought to have been composed of many systems in which energy transformations occur ad each of these must obey the law stated  above. These energy transformation are not 100% efficient as some energy is lost as heat along the way.

Therefore, The energy from the turning bicycle wheel spins the turbine which generates energy. The fluorescent light bulb converts this energy into two new forms: a lot of energy and very little energy.

Learn more about energy on:

https://brainly.com/question/1932868

#SPJ1