A typical echinoderm boat is 20 to 30 feet long and can carry 2,000 to 6,000 pounds.
In logistic growth, a population's rate of per capita growth declines because it approaches the carrying capacity, a limit imposed by the environment's finite resources ( K).
What about sea urchins?You may suffer major health effects if your injury is severe or if you do not properly treat it. Echinoderm stings can result in tissue necrosis, death, paralysis, and respiratory failure. Skin cells that do not receive enough oxygen or blood perish and cause tissue necrosis. Echinoderm stings hurt right away. They often create puncture wounds on the skin, which if not treated immediately can quickly become infections. The sting site may swell and switch crimson. If the skin is penetrated (which happens frequently), the puncture site is usually bruised and appears blue-black. Echinoderm or uni because it is more generally known by its Japanese name, are often eaten in a variety of ways, including as a savoury complement to pasta dishes and as a part of a sushi feast. The buttery flavour and (pleasantly) slimy texture of uni, however, are best experienced fresh from the shell. Echinoderm has a little saltiness without being too salty. Once they are fresh, they ought to have a sweet, saltwater flavor and taste of iron and zinc. Uni features a strong mineral and seaweed flavor and ought to have a creamy texture. Older ones taste quite harsh and have a slimy texture on the tongue.Learn more about sea urchins here:
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in mice, the copy of the igf 2 gene that is inherited from the mother is never expressed in her offspring. this happens because the igf 2 gene from the mother a. always undergoes a mutation that inactivates its function. b. is deleted during oogenesis. c. is deleted during embryonic development. d. is not transcribed in the somatic cells of the offspring.
in mice, the copy of the if 2 gene that is inherited from the mother is never expressed in her offspring. this happens because the if 2 gene from the mother is not transcribed in the somatic cells of the offspring.
Option B is Correct : is not transcribed in the somatic cells of the offspring.
Somatic cells in humans are diploid, which means they have two sets of chromosomes, one from each parent. Although somatic cell DNA mutations can have an impact on an individual, they cannot be passed on to a person's progeny.somatic tissues. All living things are composed of somatic cells, which are the basic building blocks of all organisms. Somatic cells in humans are diploid, which means they have two sets of chromosomes, one set from each parent. Somatic mutations can affect the person who has them but cannot be passed on to their offspring and have no impact on them.
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which phase of mitosis is characterized by each pair of sister chromatids moving to opposite sides of the cell?(1 point) responses prophase
Each pair of sister chromatids moves to the opposing sides of the cell during the mitotic phase known as telophase.
The results of prophase are reversed during telophase. The spindle disintegrates, the chromosomes start to decondense, and the nuclear membranes and nucleoli reform during telophase.The chromatids are moved to opposing ends of the cell until two sets of nuclei are created during the last stage of mitosis, known as telophase.Telophase is the final stage before to the onset of cytokinesis, or the separation of the cytoplasm into two halves.To learn more about prophase click here ,
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olfactory neurons have the capacity to regenerate in adulthood, while brain neurons do not. why is it thought olfactory neurons adapted this function?
Compared to all other cranial nerves, the olfactory nerve is unique due to its inherent ability to regenerate.
What is olfactory nerve?Olfactory sensory neurons is located in the nasal epithelium that detects and transmits odorant information to the central nervous system. This requires that these neurons form a specific neuronal connections within the olfactory bulb and express receptors and signaling molecules particularly for these functions.
After peripheral sensory neurons detects an odorant ,the signal is relayed to the OB in the brain. This portion of the olfactory system that is the OB is also a subject to modification by lifelong neurogenesis.
Olfactory nerve is the first cranial nerve and this nerve enables your olfactory system and also sense of smell.
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What steps does the cell take to speed up the rate of DNA replication?
Which statement describes one difference between eukaryotic cells and prokaryotic cells
A Only eukaryotic cells are found in unicellular organisms
B Eukaryotic cells are smaller and less complex than prokaryotic cells
C Only eukaryotic cells contain DNA
D Only eukaryotic cells have specialized organelles enclosed in membranes
The one difference between eukaryotic cells and prokaryotic cells is that only eukaryotic cells have specialized organelles enclosed in membranes.
The single membrane layer surrounds the prokaryotic cells but there are two surrounding membranes in the case of eukaryotic cells which are the plasma membrane and the nuclear membrane. The cell wall in the plasma membrane is made up of carbohydrates, lipids, proteins, and certain amino acids, whereas chitin and cellulose combine together to make up the cell wall of eukaryotic cells. The cell membrane of the prokaryotic cells contains the Respiratory enzyme while the cell membrane of the eukaryotic doesn't contain this enzyme. In prokaryotic cells, endocytosis and exocytosis do not occur and it takes place in many protists and also in animals.
I hope this answer helps.
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what will happen to the cl- equilibrium potential, if one changes the extracellular chloride concentration from 560 mm to 100 mm? give the direction of cl- flow.
The chlorine (cl-) will flow from higher concentration to lower concentration, that is from 560 mm towards the 100 mm direction.
Concentration gradient is more important in cellular metabolism. They maintain the solute solvent interaction properly.
To maintain a stable concentration, the cell attains an equilibrium of solute solvent. That is they flow from higher concentration to lower concentration to maintain an equilibrium.
Chloride ions (Cl−) are pivotal in neuronal signaling; they permeate through anion channels thereby regulating membrane potential and excitability in neurons. A large proportion of Cl− permeable channels are gated by the neurotransmitters GABA and glycine.
Neurotransmitters are signaling molecules that flow from one cell receptor to another to transfer signals to other cells and tissues of the body. Therefore, to maintain equilibrium, the cl- ion will flow from higher concentration to lower concentration.
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What is the purpose of spindle fibers during mitosis?
Answer: Separate the Sister Chromatids
Explanation: Spindle Fibers are on either end of the cell pulling the chromosomes apart during Anaphase
PLSSS HELP IF YOU TURLY KNOW THISS
Answer: It's D hope this helps
Explanation:
Which installation method is most likely to put your computer at risk of downloading a virus?.
Internet installation method is most likely to put your computer at risk of downloading a virus.
Understanding viruses in computers
Viruses are files that interfere with the operational system on PCs and laptops, if the laptop is exposed to a viruses then automatically the laptop's performance will not be maximized, usually this form of virus interference such as the ability to load becomes slower / slower, the loss of files that we save suddenly , the laptop restarts repeatedly, if you are faced with a great virus sometimes the OS will be deleted, this will force us to reinstall the OS on the laptop.
What is called a virus in a computer is an annoying file, so every file that can interfere with the performance of the OS is a virus, this annoying file can be in the form of ordinary files that we intentionally store but are damaged, Worms, Trojan Horses, Spyware, and malicious malware that is installed either intentionally or not. Actually we don't need to be afraid of being too much with what is called a virus in a PC / laptop, as long as we want to take the anticipatory steps correctly, then the possibility of a virus can interfere with our laptop is very small.
Here's how to prevent and avoid viruses from entering your computer or laptop:
1.Use a compatible and bona fide antivirus, always update the antivirus;
2. If your computer or laptop is often used to browse the internet, then use an antivirus that has Internet Security features;
3.Activate Firewall on Windows that you are using;
4.Always update Security Update on Windows Security;
5. Do not get into the habit of storing data on drive C for too long;
6. Identify all the data that you store on the laptop, and immediately discard/delete if there is data that you do not recognize;
7. Delete registry files that are not needed regularly;
8. If you are going to transfer data from another device/device, try not to open it when it is still connected, so send/copy it directly and then disconnect the device/device;
9.Use cleaning tools like Ccleaner, TuneUp Utility, etc.
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Third-party installation method. This method is usually done when we want to add an application that is on our computer, and if we use an unverified third party, the computer's risk of getting a virus increases.
Explanation:When using a computer, sometimes we want to add software or applications that are on our computers according to the needs at that time. However, some applications are required to make a payment beforehand or there are applications that cannot be obtained officially.Therefore, as an alternative, some people like to get these applications through third parties, even though there are already verified parties, but some are still not verified.For those who has not been officially verified, we usually call it a cracker application.When downloading through unverified parties, we usually do not understand what we are downloading in the process and tend to follow each stage. However, without realizing it, sometimes what we download unconsciously is a virus or contains a virus that will harm our computer and data.Learn more
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For a gene that has four alleles in nature, what is the maximum number of genotypes that can exist in a population?.
For a gene that has 4 alleles in nature, the maximum number of genotypes that can exist is 10 genotypes.
How is relationship between alleles normally described ?The relationship between allele frequencies and genotype frequencies in populations at Hardy-Weinberg Equilibrium is normally described the use of a trait for which there are two alleles existing at the locus of interest.Number of genotypes for a given wide variety of alleles given 'n' alleles at a locus, the range genotypes viable is the sum of the integers between 1 and n, formula for 4 alleles:1 + 2 + 3 + 4 = 10 genotypes
An allele is a variant shape of a gene. Some genes have a range of one of a kind forms, which are located at the same position, or genetic locus, on a chromosome.Learn moreMaterial about allele here: brainly.com/question/2597008
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multicellular organisms undergo mitotic cell division to a.produce new organisms. b.produce gametes. c.increase the variability of the population. d.increase the size of the organism.
Multicellular organisms undergo mitotic cell division to d.)increase the size of the organism. Hence option d) is the correct answer.
Why multicellular organisms undergo mitotic cell division?Mitosis is very important to multicellular organisms because it provides new cells for growth and replacement of worn-out cells. Many single-celled organisms depends on mitosis as the primary means of asexual reproduction
During mitosis, a cell duplicates its contents, including chromosomes and splits to form two identical daughter cells. Multicellular organisms require cell division to grow and replace dead/ damaged cells. Single-celled organisms reproduce through unicellular cell division
Process where a single cell divides into two genetically identical daughter cells is called mitosis.
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A bird that preys on moths is introduced to the habitat with moths and trees like the ones shown below.
A white moth and a black moth are shown.
What will most likely happen to the population of moths in this habitat?
Answer:They will minimize/the population will go down.
Explanation: The moths are used to not being eaten and a new bird that eats them as their main source of food is introduced, then the population will go down as they will be feasted upon
give examples of situation when a substance cannot be moved into a cell by osmosis or diffusion and how active transport solves the problem
When a substance cannot move by osmosis or diffusion, it is because it cannot cross the plasma membrane due to its charge or size, and if it is by diffusion, it is because it is against its concentration gradient.
Why can't a substance go through osmosis or diffusion?A substance could not pass through osmosis since only water can pass to the place with the highest concentration. While by diffusion it could not happen due to its size or electric charge, neither if the concentration gradient is against it.
Active transport helps in this by passing elements against their concentration gradient, generating an energy expenditure for this to occur since this movement is not energetically possible.
Therefore, we can confirm that when a substance cannot move by osmosis or diffusion, it is because it cannot cross the plasma membrane due to its charge or size, and if it is by diffusion, it is because it is against its concentration gradient.
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how will a smaller pcr product appear on an agarose gel after electrophoresis compared to a larger pcr product? explain why they appear differently.
Comparison of spectrophotometry, fluorometry, and qPCR with agarose gel to assess PCR product yield.
Primers are not always specific in their binding and can bind to an undesirable region of the template DNA, resulting in a larger-than-expected product size.The PCR primers are most likely amplifying a smaller segment of the gene spanning your target region. If you extract and sequence the 500 bp PCR band, you will know that it is a smaller product that could have included your target region. Smaller DNA fragments require higher agarose concentrations, whereas larger molecules require a lower agarose concentration. To make a gel, agarose powder is combined with an electrophoresis buffer and heated to a high temperature until it becomes a gel.
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describe different ways to harvest trees. what is the most sustainable? why? what is the least sustainable? why?
Using the theories of harvesting, we got that selecting logging is the most sustainable and single-tree selection is the least sustainable harvesting method for tree.
Selective logging is most profitable timber-harvesting method, which explains its choice for economic reasons. However, this actually effect is short-term and disrupts forest health, alongside with other selective cutting negative impacts on the environment.
Single tree selection is a natural regeneration system that was pioneered here in the Lake States. Used primarily in northern hardwood forests, single tree selection is a cutting method designed to regenerate and maintain uneven-aged stand`s.
Hence, the most sustainable way to harvest trees is selective logging as it is economical, and the least sustainable way of harvesting is single-tree selection as it is practiced mainly naturally because of regeneration.
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can someone please double check my work?
(the cell is permeable to only na+,k+. impermeable to starch.)
Due to starch molecules' size, which is too large to fit through the dialysis machine's pores, the synthetic selectively permeable membranes is unable to flow through it.
How come this membrane is considered permeable?Due to its ability to control the flow of chemicals into and out of cells, the plasma membrane is known as a selectively permeable membrane. It indicates that despite blocking the passage of some materials, the plasma membrane allows the passage of others.
what is the definition of a permeable membrane?The cell wall in plant cells is a prime example of the a permeable membrane in nature. For plant cells, cell walls act as support and defense. Water, chemicals, and proteins can pass through them without restriction. The plant cells can now freely interchange nutrients and water as a result.
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in poodles, black fur is dominant to white fur. a black poodle is crossed with a white poodle. in a litter of four, all of the puppies are black. what is the best conclusion? group of answer choices
The most appropriate conclusion is that the black poodle is most likely homozygous. two identical alleles present at a specific gene location.
What does a homozygous example entail?If you have two identical copies of a gene, you are said to be homozygous for that gene. It is the opposite of such a heterozygous genotype, in which the alleles are distinct. People with recessive features, such as red hair or blue eyes, are always homozygous for the that gene.
What is homozygous? imageThe chromosomes in humans are divided into two groups. Allele pairings are referred to either homozygous or heterozygous. Homozygous people are those who have two copies of the same allele (RR or rr). While heterozygous refers to a particular organism with multiple alleles (Rr).
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- 5. Which of the following would ecologists NOT study?
A. how beavers get food.
B. how much water is needed for a corn crop.
C. how plastic expands when it is heated.
D. how rabbits escape from predators.
Answer:
I think C is correct
Explanation:
I am not really sure
the hyphae of arbuscular mycorrhizal fungi (amf) form bushy structures after making contact with the plasma membrane of a root cell. what is the function of these structures?
Answer:
hey INCREASE the surface area available for the transfer nutrients
Explanation:
What device can be used to make measurements globally? a. rain gauge b. buoy c. satellite d. thermometer please select the best answer from the choices provided a b c d
The correct answer for the multiple choice question above is D. Or thermometer.
What is type of thermometer ?Thermometer is a device which used for measuring temperature in almost all countries. Because it have an agreed standards in international standards.Thermometer itself is a tool used to determine the amount of temperature. Thermometers themselves have various types according to their function.Some types of thermometers that we often encounter in everyday life are thermometers measuring body heat or also called clinical thermometers, laboratory thermometers which are used to measure temperatures related to research conducted in the laboratory, and the last is a bimetallic thermometers, which is a thermometer used to determine the difference in volume or expansion between two types of metal.Learn more about types of thermometers here: brainly.com/question/22047357
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you look at a blood cell and see that it has no nucleus; instead it has irregularly shaped fragments inside of it. what kind of cell it is?
You look at a blood cell and see that it has no nucleus; instead it has irregularly shaped fragments inside of it which means that the kind of cell is a platelet.
What is Platelet?This is referred to as a tissue which forms part of the blood and it is responsible in the formation of clots which helps to to stop bleeding.
Platelets can only be seen under microscope as a result of it very small shape. It has no nucleus; instead it has irregularly shaped fragments inside of it which is therefore the reason why platelet was chosen as the correct choice.
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during cellular respiration the energy in glucose is used to manufacture glucose. is released all at once. is stored and carried by electrons. becomes stored in molecules of water.
During cellular respiration the energy in glucose is stored and carried by electrons
What is Cellular respiration ?A glucose molecule gradually degrades into water and carbon dioxide during cellular respiration. During the process of transforming glucose, some ATP is created immediately. However, oxidative phosphorylation, a process, results in the production of significantly more ATP.
In order to get chemical energy for cellular processes, organisms require oxygen to break down food molecules during cellular respiration. In addition to algae and other protists, cellular respiration also occurs in the cells of animals, plants, and fungus.The activity is known as "cellular respiration" because the cell seems to "respire" by consuming molecular oxygen (as an electron acceptor) and exhaling carbon dioxide (as an end product).Learn more about Cellular respiration here:
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why does the glucose concentration in the urine within the urinary bladder become zero in these experiments?
More glucose transporters lead to greater absorption of glucose.
What changed as the number of glucose carriers rose in terms of the amount of glucose found in the urine.a person's heart rate. For further information, Investigating the Impact of Glucose Carrier Proteins on Glucose Reabsorption. As the number of glucose carriers increased. The level of glucose was reduced.
What is the name of the glucose loss in the urine?When blood sugar (also known as blood glucose) enters the urine, you get glycosuria. Any liquid that travels through your kidneys will normally cause blood sugar to be absorbed back into your blood vessels. When you have glycosuria, your kidneys might not be able to remove enough blood sugar from your urine.
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the effects of sympathoadrenal and parasympathetic nerve activity on the cardiac rate and stroke volume.
The volume of a stroke and the heart rate. From of the adrenal gland, dopamine & adrenaline.
What takes place after a stroke?Brain activity is lost when brain cells are destroyed. It's possible that you won't be able to perform tasks that require that section of your brain. For instance, a stroke may impair your capacity to move, communicate, eat, think, and recall, as well as your capacity to control your bowel & bladder, emotions, and other essential bodily processes.
Is a stroke a result of stress?Stress can increase blood pressure, raise blood sugar and fat levels, and make the heart work harder. Due to these factors, there is a higher chance that clots will develop, spread to the heart and brain, and result in a stroke or a stroke.
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which is not an example of paleoclimate proxy data? group of answer choices corals ice cores ocean temperatures tree rings
Not example of paleoclimate proxy data is ocean temperatures.
What is paleoclimate proxy data?
Assessment and evaluation of climate change must be carried out using recorded observational data as well as prepared and provided proxy data. Paleoclimatologists (climatologists who study past climates or paleo) use the term "proxies" to describe the way climate change is recorded in nature.
Here's paleoclimate proxy data:
Historical data can contain a lot of information about past climates.Corals, build their hard skeletons from calcium carbonate a mineral extracted from seawater.PollenIce cores, located high in the mountains and near the poles, have accumulated from snowfall over thousands of years.Tree rings, climatic conditions affect tree growth, patterns of tree ring widths, densities, and isotopic composition reflect variations in climate.Caves, these dungeons contain secrets to Earth's climate in speleothems also known as stalactites, stalagmites, and other formations.Pack rat middensareOcean and lake sediments, billions of tones of sediment accumulate in the sea and lake basins each year, providing a tremendous amount of information about the environment.Learn more about paleoclimate proxy here https://brainly.com/question/23529208
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if you were told that you would get extra credit for finding a model showing chromosomes separating while sister chromatids were still attached, you would look for a model of
A representation that is showing chromosomes separating while sister chromatids were still attached refers to a model of Anaphase I.
What is Anaphase I in the cell division cycle?Anaphase I in the cell division cycle refers to the stage of meiosis in which sister chromatids are still attached and homologous chromosomes migrate to opposite poles of the parental cell.
Therefore, with this data, we can see that Anaphase I is one of the latter stages of first round of the meiotic cell division cycle which separates homologous chromosomes.
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Which objective lens should you start with when attempting to locate something under the microscope?.
When attempting to locate something under the microscope, the objective lens that should be started with is 4X.
Objective lens are the one that are placed closest to the specimen when observing under the microscope. Their function is to gather light from the specimen and focus it towards a different type of lens called the ocular lens.
4X is the lowest magnification of the objective lenses. However, they have a larger field of view and therefore more of the specimen can be observed at once that allows the observer to locate the exact target. Due to poor magnification, the target may not be clearly visible, however it can be later watched in higher magnification.
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the one term the amoeba sisters don't mention in their discussion of other effects is? epigenetics multifactorial pleiotropic polygenic
They are referred to as polygenic characteristics. Each gene's allele has a negligible additive influence on the phenotype.
Is an amoeba a virus or bacteria?
Prokaryotes include bacteria. A eukaryote is an amoeba. A few organelles as well as genuine nuclei are absent. Several organelles & nuclei are present in these eukaryotes.
Can you treat amoeba?Antibiotics are used in the treatment of amebiasis to eradicate the infection. Whether or not you are experiencing symptoms will determine which antibiotics your doctor recommends. Even if you are symptom-free, you could still require one sort of antibiotic. You might need to use two separate antibiotics if you do exhibit symptoms.
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a cell with 6 chromosomes undergoes meiosis. at the end of all of meiosis and cytokinesis, how many daughter cells are produced and how many chromosomes are in each daughter cell?
At the end of meiosis of a cell with 6 chromosomes, 4 daughter cells are produced with 3 chromosomes in each cell.
Meiosis is the process of reductional division. It is called so because it reduces the chromosome number into half in the daughter cells. The meiosis is accomplished in two phases: Meiosis I and Meiosis II. Meiosis I is the actual reductional division where the chromosomes are halved.
Chromosomes are the compact form of genetic material. It comprises of DNA and histone proteins. The genetic material is transmitted to daughter cells in this form. Each chromosome is composed of two sister chromatids that are joined together at the region called centromere.
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when an ion channel opens in a sarcolemma, ions flow across the membrane, altering the potential. these cells are said to be . the pump mechanism that maintains the resting membrane potential is an example of . a cell membrane is when there is a higher concentration of cations on one side and a higher concentration of on the other. the difference in charge created by the ecf ions and the icf ions is called the . membrane potential is measured in
Ions are compelled to migrate passively in one direction by the potential gradient of the membrane potential.
What is the mechanism of membrane potential?
Positive ions are drawn to the negative side of the membrane, while negative ions are drawn to the positive side, creating a potential gradient known as membrane potential that compels ions to passively migrate in one way.
When an ion channel opens in a sarcolemma, ions flow across the membrane, altering the potential. these cells are said to be Electrically excitablethe pump mechanism that maintains the resting membrane potential is an example of Active transportWhen there are more cations on one side of the cell membrane and more anions on the other, the membrane is polarized. Typically, the outside of a neuron has a higher concentration of cations than the inner does, and vice versa.The difference in charge created by the ECF ions and the ICF ions is called the membrane potentialmembrane potential is measured in microvolts.Hence, membrane potential is a voltage or electrical charge across the plasma membrane
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