Yes, Pisaster ochraceus is a keystone species because helps to maintain balanced populations of seaweeds and the ecosystems that depend on them by controlling the numbers of mussels as well as barnacles.
A keystone species, is Pisaster ochraceus?This sea star contributes to the maintenance of healthy seaweed populations and the communities of sea urchins, sea snails, limpets, and bivalves that consume them by controlling the populations of mussels.
Note that Sea stars like this one, Pisaster ochraceus, were the first creatures to be recognized as keystone species.
A crucial species in the rocky marine intertidal communities off the northwest coast of North America is the starfish Pisaster ochraceus.
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Enzymes take on very important shapes/conformations and require cofactors and coenzymes to properly fold. What are some ways you could use the information about enzymes shape and specificity to design a treatment against a bacterial infection?
The ways in which one could use the information about enzymes shape and specificity to design a treatment against a bacterial infection is by making the antibacterial to be able to denature it.
What is Enzyme?This is referred to a biological catalyst which is involved in speeding up the rate of a reaction and is proteinous in nature.
Enzymes are substrate specific which is why they only bind to a substrate which has a similar shape and the production of antibacterial will employ the use of agents which will denature it. The change in shape will make it impossible for the bacteria to perform certain metabolic reactions thereby leading to its death.
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Which is NOT one of the factors used
to determine growth rate?
A. number of individuals past the reproducing age
B. number of deaths
C. number of individuals moving into and out of the
population
D. number of births
Answer:
C
Explanation:
A- Means less births due to less fertility.
B-The deaths means less lives and decrease in growth rate.
C-Does not affect frowth rate.
D-Is increasing growth rate
What is osmosis? Describe this process including the types of molecules that move and the energy required. Include in your description details about the areas of concentration on either side of a membrane when osmosis occurs.
Answer:
Osmosis: Water diffuses through a semipermeable membrane during osmosis, a particular type of diffusion.
Explanation:
Water easily travels across a membrane in a potential gradient from high to low. Osmosis, one of the most important natural processes, is a natural occurrence. A weaker salt solution will often migrate to a stronger salt solution throughout this process. Reverse osmosis is capable of eliminating up to 99%+ of the dissolved salts (ions), particles, colloids, organics, bacteria, and pyrogens from the feed water, yet it shouldn't be relied upon to entirely remove bacteria and viruses. A RO membrane rejects contaminants based on their size and charge. A correctly operating RO system will likely reject any pollutant with a molecular weight more than 200 (for contrast, a water molecule has a molecular weight of 2).
A few calculations are employed for both design considerations and performance evaluation of a RO system. Instrumentation in a RO system shows quality, flow, pressure, and occasionally other information like temperature or operating hours. The following operational metrics are necessary in order to appropriately assess the performance of a RO system, at the very least:
Feeding forcePermeate forceIncrease your pressure.Charge conductivityTransparent conductivitySupply flowfluid permeationTemperatureREJECTION OF SALT %
You may determine from this equation how well the RO membranes remove impurities. It provides information on the system as a whole rather than the performance of each individual membrane. 95% to 99% of most feed water impurities will be rejected by a RO system that is well-designed and has RO membranes that are operating effectively (that are of a certain size and charge). The following equation can be used to calculate how well the RO membranes are eliminating contaminants:
Conductivity of Feed Water - Conductivity of Permeate Water 100; Salt Rejection%
Feed Conductivity
The system works better the higher the salt rejection. A poor rejection of salt may indicate that the membranes need to be cleaned or replaced.
PASSAGE SALT
This is the percentage of salts flowing through the RO system in terms of quantity. The method works better the lower the salt channel is. A high salt passage could indicate that the membranes need to be cleaned or replaced.
(1 minus Salt Rejection%) = Salt Passage
RECOVERY
Water that is being "recovered" as good permeate water is measured by percent recovery. The quantity of water that is not drained as concentrate but is instead collected as permeate or product water is another way to conceive of percent recovery. The higher the recovery percentage, the more permeate water is being saved and less water is being sent to the drain as concentrate.
There are many industrial applications that call for demineralized or deionized water, and reverse osmosis is a reliable and efficient technology to generate water that is suited for these uses. The quality of the RO permeate can be improved through additional post-treatment after the RO system, such as mixed bed deionization, making it appropriate for the most demanding applications. An RO system's proper pretreatment and monitoring are essential for avoiding expensive repairs and unforeseen maintenance. Your RO system should deliver high purity water for many years if it is designed properly, has a maintenance schedule, and is supported by knowledgeable service personnel.
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PLEASE ANSWER ASAP ITS A TEST:Which label belongs in the area marked X? Obreathe in from atmosphere O produce themselves Oeat other organisms O absorb from soil
RIP bro I hope u pass the test gl
Which of these sources is most likely to be credible when it comes to information on the advantages and disadvantages of using plastics?
a catalog of plastic products
a company trying to sell plastic products
a group of scientists studying plastic products
a group of activists against using plastic products
The most credible source that gives the information on the advantages and disadvantages of using plastics is: a group of scientists studying plastic products.
Plastics are the synthetic polymers. These are used for various purposes like furniture, kitchen-wares, packaging materials, containers, etc. The material that make up the plastics are: polyethylene, PVC, nylon, etc. Plastics are non-biodegradable in nature.
Scientists are people who do research and perform experiments about various scientific aspects. They may also discover new things. Scientists are the most credible source for the knowledge about plastics because they give facts based on their research and experiments.
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Answer:
C on edge
Explanation:
just did it <3
When the product of a reaction becomes the inhibitor of the enzyme that is
catalyzing the reaction, what is occurring?
allosteric activation
allosteric inhibition
feedback inhibition
competitive inhibition
c) feedback inhibition
Are lipids hydrophilic or hydrophobic? Explain why.
An amoeba is unicellular; therefore, it is an organism.
True or false
Answer:
True. This entity has been discovered and shows many of the characteristics of living things including growth, organization, and the ability to maintain homeostasis.
Explanation:
Hope it helps! =D
the structural cells of the nervous system are called
Neurons are the structural and functional units of the nervous system.
Numerous millions of neurons make up the neurological system. An internal body cell known as a neuron, also known as a nerve cell, is responsible for receiving, processing, and transmitting information via electrical and chemical impulses.
The brain, where information is processed, is the central component of the nervous system and contains the majority of its neurons. A cell body, also known as soma, dendrites, and an axon are components of every neuron.
There are only two primary types of cells in nerve tissue, despite the fact that the nervous system is incredibly complicated. The neuron is a type of nerve cell. The nervous system's basic building block, the "conducting" cell sends impulses. The other kind of cell is a neuroglia, sometimes known as a glial cell. "Neuroglia" translates as "nerve glue."
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The structural cells of the nervous system are called neurons and nerve cells.
What are neurons?The structural and operational components of the nervous system are called neurons. The neurological system is made up of several millions of neurons. A neuron, also referred to as a nerve cell, is an internal body cell that is in charge of receiving, processing, and sending information via electrical and chemical impulses.
The majority of the nervous system's neurons are found in the brain, which serves as the central hub for processing information. Each neuron has an axon, a cell body, often called a soma and dendrites.
Despite the fact that the nervous system is highly complex, there are just two main types of cells in nerve tissue.
Therefore, neurons and nerve cells are the structural cells of the nervous system.
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What is the difference between small, controlled lab experiments versus an ecosystem-scale experiment?
The major difference between the small, controlled lab experiments versus an ecosystem-scale experiment is the number of variables.
Experiments are the scientific procedures carried out in order to make some discovery, test any hypothesis or demonstrate or mimic any natural process. Experiment is a step by step process that requires strict conditions.
Variables in an experiment are the factors, characters or some condition that can be changes according to the need or demand of the experiment. There are three types of variables: Independent, Dependent and Controlled. Independent variable can be changes manually, dependent variable is the one whose change affects the experiment and controlled variables are the one that remain constant.
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The muscle is an example of an tissue.Give two reason why the muscle is called tissue ( 2 marks)
Answer: 1. It is made up of a group of cells.
2. These cells have a well-defined shape, and size and perform a specific function.
Explanation:
A cell is the unit of life. All living organisms are made of billions of cells. These cells have specific functions to play in the sustenance of a living organism.
A tissue is a group of cells that have a definite shape, size, and particular function to play.
The muscle is a group of muscle cells. These are soft tissues. They have an elongated shape and can easily contract and relax.
The muscle tissues give the body a definite structure and help in body movements.
There are three types of muscle tissues. These are soft tissues, striated muscle tissues, and cardiac muscle tissues.
Attaching the appropriate amino acid to a tRNA (i.e. tRNA charging) involves interactions between:
Attaching the appropriate amino acid to a tRNA (i.e. tRNA charging) involves interactions between activated tRNA and mRNA. This happen during the translation.
mRNA- Single-stranded RNAs of the kind known as messenger RNA, or mRNA, are used to make proteins. mRNA is created during transcription from a DNA template.
Activated tRNA- The process of attaching an amino acid to its corresponding transfer RNA is known as amino acid activation, commonly known as aminoacylation and or tRNA charging (tRNA).
Amino Acid- Small chemicals known as amino acids serve as the foundation for proteins. Proteins carry out several crucial chemical processes as well as providing structural support for the cell. Twenty distinct smaller, simpler amino acid combinations make up the molecules that make up each protein.
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Which country or region is associated with each body of water?
Match each item in Column A to the answer in Column B.
The country or region associated with each body of water is given below as follows:
Lake Tahoe = Eastern United statesOhio river = Western United statesHudson bay = CanadaArctic ocean = Canada, Western United StatesColorado river = Western United statesWhat is the Arctic Ocean?The Arctic Ocean is Earth's northernmost body of water that encircles the Arctic and flows beneath it. Most of the Arctic Ocean is covered by ice throughout the year—although there have been changes due green house effects as temperatures climb. Pale and stark on the surface, the Arctic Ocean is home to a stunning array of life.
The U.S., Canada, Greenland, Iceland, Norway, and Russia all have territories that reach into the Arctic Ocean.
The Arctic Ocean is the smallest and shallowest of the world's five major oceans that spans an area of approximately 14,060,000 km² and is known as the coldest of all the oceans.
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Our modern environment may be affecting the endocrine system and reproductive systems in today's young people. Products such as plastics and industrial chemicals are considered endocrine disruptors. Air pollution, pesticides, and other chemicals have a damaging effect on these body systems. How do you think you can protect yourself from being affected from such exposures? What steps should be taken to ensure that people are not overexposed to any harmful substances?
Some ways to protect from the overexposure to the different kind of contaminants that surround us in this modern environment are:
• Try to consume the most organic and home-made food, avoiding ultra-processed and fast food.
,• Choose hygiene and cleaning products with the less amount of chemicals possible and use them in adequate amounts.
,• Use responsibly medicaments, especially antibiotics.
,• Avoid contaminated areas such us water, or regions very close to farms that are fumigated.
,• Use sunscreen and avoid solar exposure at the high risk hours.
Steps that should be taken to ensure that people are not overexposed to any harmful substances is to regulate by laws the allowed amouns of this substances in the products we consume, and near the places we live. An example of this is the maximum number of x-rays allowed per person a year due to radiation.
could someone explain this to me
The average beak depth of the surviving birds is between 8.80 to 9.85 mm and the beak depth of non-surviving birds is between 7.52 to 11.20mm. so I would expect that those birds continued to reproduce and pass on the genes for a deeper beak. In subsequent years the beak depth decreased slightly. Generally, the additional variables did not show strong evidence of impacting survival, so beak depth is the trait driving the evolutionary trend. You may wish to add statistical calculations to this question.
What is bird’s beak?
An external anatomical feature called the beak, bill, or rostrum is usually present in birds but can also be seen in turtles, non-avian dinosaurs, a few mammals, and other animals. To eat, groom, manipulate things, kill prey, battle, probe for food, court, and feed young, an animal uses its beak.
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What can strong CMEs affect on the earth
A - CMEs can cause fires on the surface of the earth
B - CMEs can cause damage to power grids by overloading them
C - CMEs can change cloud formation and decrease albedo
D - CMEs can cause radio blackouts due to energetic photons
Answer:
CMEs can also cause surges in electrical currents which overload power grids causing widespread blackouts. Also, according to NASA, CMEs can jostle Earth's magnetic field which can impair radio transmissions and increase radio static in Earth's ionosphere.
Explanation:
What can strong CMEs affect on the earth 
Answer:
CMEs can also cause surges in electrical currents which overload power grids causing widespread blackouts. Also, according to NASA, CMEs can jostle Earth's magnetic field which can impair radio transmissions and increase radio static in Earth's ionosphere.
What would happen if the heart stopped pumping?
A) Oxygen could not be used for cellular respiration
B) Waste could not be removed from the body
C) The lungs would stop taking in oxygen
D) Blood would stop its flow throughout your body
Answer:
D) Blood would stop its flow throughout your
body
Explanation:
When a Heart stopped pumping then all the blood that flows though out your body will begin to slow down the flow of blood. Although at possible rate Lungs would stop taking in oxygen but the best answer to know first cause is Answer D.
why it is difficult to accurately quantify the quantum of carbon released from terrestrial ecosystems that are as a result of land-use change.
It is difficult to accurately quantify the quantum of carbon released from terrestrial ecosystems because Land uses and land cover changes have remarkable environmental outcome at local, regional, and global scales.
In terrestrial ecosystems carbon is stored within biomass, such as tropical and temperate forests. Carbon is transferred to the soil via leaf litter, roots and plant debris upon decomposition. Bacteria contributes in decomposition of dead matter to releases Carbon back to the atmosphere. So the land usage changes may cause intense inference at the regional and global scales for global loss of biodiversity, distresses in hydrogen and carbon cycle .
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What function is shared by both the skeletal system and the muscular system?
warming the body
protecting vital organs
creating red blood cells
fighting bacterial infections
Skeletal system and the muscular system help in protecting vital organs.
What is skeletal system?The skeletal system aids in defending the body's essential organs. The body's bones and joints are all part of the skeletal system. Each bone contains several cells, protein fibers, and minerals to form a complex living organ.
The soft tissues that make up the rest of the body's soft tissues are supported and shielded by the skeleton, which serves as a scaffold. Muscles can link to the skeletal system at specific places to enable joint mobility.
One of the three important muscle tissues in the human body is found in the skeleton. Thousands of muscle fibers are encased in connective tissue sheaths to form each skeletal muscle. Fasciculi are the individual bundles of muscular fibers that make up skeletal muscles.
Therefore, Skeletal system and the muscular system help in protecting vital organs.
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Which condition best represents homeostasis?
having a heart attack
bleeding to death
sweating on a hot day
fracturing a limb
Within the active site of an enzyme, the amino acid side chains interact with the substrate. When the substrate binds, it causes a slight confirmational shift in the enzyme and active site, which induces what in the substrate?
When the substrate binds, it causes a slight confirmational shift in the enzyme and active site, which induces a slight change in shape in the substrate.
What is an enzyme?An enzyme is defined as a type of protein that has the ability to increase the rate of a chemical reaction but remains unchanged at the end of the chemical reaction.
The enzyme consists of a binding site that is made up of amino acids where the substrate interacts.
A slight conformational shift occurs in the active site of the enzyme which automatically leads to the slight change in shape of the substrate and formation of substrate-enzyme complex.
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A common yard decoration during Halloween is the infamous scarecrow. Aside from
Halloween, scarecrows were used by farmers and intended to scare away birds from
seeds and growing crops. But do they really work? Explain how you could test if
scarecrows are truly an effective bird deterrent.
Yes, scarecrows work effectively as bird deterrents.
Scarecrows are human like figures that are stationed on fields or farmlands to scare away birds.
To know how effective scarecrow can be, the following things need to be done.
The scarecrow has to flashy that it will attract attention from distance The position of the scarecrow has to changed often so that the birds will not get familiar with the position It should be adorned with accessories that make noise when there is breeze.The scarecrow works as effective bird deterrents when it is not left the same for a long period of time.
#scarecrow# #birds# #deterrents#
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Why are Somali villages with sustainable grazing considered outliers? Based on your answer, how would you define an outlier?
Despite years of drought, a few Somali settlements have maintained excellent rangeland, making them outliers.
Outliers are data points, people, or communities that deviate from the norm.
This is further explained below.
Somali villages with sustainable grazing:Generally, Because they have been able to keep healthy rangeland throughout years of severe drought, the few Somali villages that have sustainable grazing are regarded to be outliers. This is in contrast to the bulk of the communities, which have not been able to preserve good rangeland.
In conclusion, An person, group, or community that is significantly different from the norm or that resides outside of a cluster of data points is referred to as an outlier.
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Which of these waves have a greater amplitude?
1.
2.
3.
4.
Answer: number 1
Explanation: the higher the crest( the top) the higher the amplitude
Answer:
The answer to this question is:1
Explanation:
Because 1 has the lines reaching top and bottom line meaning it has a greater amplitude
Which is an example of how a
food resource could be
partitioned?
A. a predatory species feeding on a prey type and
fighting off other species for that source
B. multiple species sharing space at a watering
hole
C. an organism fighting another for a food
source
Answer:
B
Explanation:
Many species will gain by choosing this option as they all get the water.
Answer: B. multiple species sharing space at a watering
hole
Explanation:
After completing an internship with UC San Francisco in the Yosemite National Park for 3 months what change would most likely be seen in your blood?
The change most likely be seen in your blood a website about camping in Yosemite National Park sponsored by a company that sells tour guide services an article about geographical features of Yosemite National Park that includes an author’s name and works cited.
What is website?Company's name and fame id totally depends upon advertisement and its products and websites play an important role in order to make company popular and due to this reason company used the website or designed the website in unique and knowledgeable manner.
Therefore, The change most likely be seen in your blood a website about camping in Yosemite National Park sponsored by a company that sells tour guide services an article about geographical features of Yosemite National Park that includes an author’s name and works cited.
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Under what circumstances might brighter feathers be an adaptive trait for a male songbird? What about a non-adaptive trait?
Beaks (bills), feet, and plumage, in particular, are three physical traits that show distinct environmental adaptations (feathers). Eye color, earlobe size, and the capacity to curl one's tongue are examples of non adaptive traits in humans.
What are some adaptive features of a bird?Beaks (bills), feet, and plumage, in particular, are three physical traits that show distinct environmental adaptations (feathers). The mode of evolution that produces living things that are adapted to their environments is natural selection.
Similar to how hair regulates body temperature for mammals, a bird's feathers are crucial in controlling body temperature. Camouflage. Some birds have the innate ability to blend into their surroundings, just like many other animals do. This enables them to evade predators or approach potential prey covertly.
A trait that is neither helpful nor detrimental for reproductive success from the perspective of natural selection. Eye color, earlobe size, and the capacity to curl one's tongue are examples of non adaptive traits in humans.
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an individual with the condition of myasthenia gravis is faced with an autoimmune disorder in which the body defenses attack acetylcholine receptors on muscle cells. what would be the expected effect on calcium levels near contractile proteins, following the arrival of an electrical impulse at those neuromuscular junctions?
When acetylcholine binds to its receptor, the muscle is stimulated and contracts. In myasthenia gravis, immune proteins called antibodies block, alter, or even destroy acetylcholine receptors at the neuromuscular junction, preventing the muscle from contracting.
How does myasthenia gravis develop in relation to the immune system?Myasthenia gravis causes antibodies to be produced by your immune system that either block or harm many acetylcholine receptor sites in your muscles. Because there are fewer available receptor sites, your muscles get fewer nerve impulses, which results in weakening.
Myasthenia gravis (MG) is a long-term autoimmune disorder in which antibodies prevent the nerves' ability to communicate with the muscles, weakening the skeletal muscles as a result. Acetylcholine receptor antibodies are the main cause of myasthenia gravis, a neurological disorder that weakens and exhausts the voluntary muscles.
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Predict the outcome when two elements are chemically combined? (HS-LSI-1) DOK 2
The outcome when two elements are chemically combined is a compound and is based on different types of bonds.
What is a Compound?This is referred to as a substance which is formed as a result of the combination of two or more elements through the various types of bonding. There are various types of bonding processes and they include electrovalent, covalent etc which have their unique properties and technique.
An element needs to achieve a stable octet configuration which is why they donate or accept electrons. An example of a compound is Calcium chloride which is formed from the reaction between the elements Calcium and chlorine.
The Calcium donates one electron each to two atoms of chlorine which accepts it and forms the compound named above thereby making it the correct choice.
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