Answer:
the change in the electrical potential energy of a single potassium ion as it moves across the membrane is 1.12941 × 10⁻²⁰ J
Explanation:
The formula used in determining the change in the electrical potential energy can be expressed by the relation.
Charge in electrical Potential energy = [tex]q ( V_2 - V_1)[/tex]
where q = the potassium ion
q = 18 electrons and 19 protons
q = 19-18 = 1 electron
1 electron = 1.602 × 10⁻¹⁹ Coulombs
Thus;
the potential inside the cell is −70.5 mV
= -70.5 × 10⁻³ V
∴ Charge in electrical Potential energy = [tex]q ( V_2 - V_1)[/tex]
Charge in electrical Potential energy = [tex]1.602*10^{-19} ( 0 - (-70.5*10^{-3})[/tex]
Charge in electrical Potential energy = 1.12941 × 10⁻²⁰ J
Thus; the change in the electrical potential energy of a single potassium ion as it moves across the membrane is 1.12941 × 10⁻²⁰ J
I want some hand with this please
1) One reason why deforestation is occuring because people need wood from trees to build things, therefore, leading them to cuting countless of trees.
2) One environmental problem that results from widespread deforestation is that the carbon dioxide they would normally use remains in the atmosphere, therefore, promoting erosion.
3) One way to lessen the effects of deforestation is by re-planting the cut-down trees and by cutting down less trees.
This was my answer from the same question that you asked before
I hope it helps though :)
Compared to our solar system, the universe is
1.
younger, smaller, and contains fewer stars
2.
younger, larger, and contains more stars
3.
older, smaller, and contains fewer stars
4.
older, larger, and contains more stars
In a rabbit, B is the allele for a black coat and b is the allele for the brown coat, what is the genotype of a brown coat
A)bb
B) Bb
C) BB
The correct answer is A) bb
Explanation:
In genetics, an allele is a variation of a gene, which often determines a physical trait. Alleles are classified as dominant if they express even when there are other alleles or as recessive if two copies of the same allele are needed for the gene to express. Moreover, in genetics dominant alleles are represented by uppercase letters while recessive alleles are represented by lowercase letters.
In this context, the allele that is responsible for the brown coat in rabbits is a recessive allele, considering this is represented by lowercase b. This means two copies of the allele are necessary for the rabbit to have a brown coat and therefore the genotype of a brown coat is bb. Also, others such as Bb and BB have the dominant allele related to the black coat, and therefore will lead to rabbits with a black coat.
With named examples of snails, discuss any three marketable characteristics of snails and their possible uses.
Answer:
Land snails, sea snails and fresh water snails are the main types of snails with over 40,000 different species in the world.
A Snail comprises of a high percentage of protein when compared to fat making it a good source and healthy meal for the cardiovascular parts of the body.
They also contain essential vitamins and minerals such as necessary for the metabolism of the body such as calcium, iron, selenium, magnesium and vitamins A,B12,E and K which help as strong antioxidants.
They also contain vitamin minerals which helps to boost the immune system.
Researchers are working to develop biofuels to free us from dependence on fossil fuels. Based on what you know about cellulose, what do you predict are the major advantage and disadvantage of using cellulose-rich plant material as biofuel?
Answer:
Cellulose is a macro molecule with high storage of energy lodged in its molecules.Therefore, this high energy content is a good advantage for Biofuel.
However, the mass e of the hydrogen bonds holding it molecules makes it difficult to undergo hydrolysis to glucose. This is a disadvantage which may affect the production of biofuel from cellulose.
Explanation:
Puerto Rico, Cuba, Jamaica, and Hispaniola have species of anole lizards with distinct body types, including the grass lizards, which have long tails; the canopy lizards, which have large toe pads; and the twig lizards, which have short legs. Anole species with each of these three body types exist on each of the:_________
Answer:
four islands.
Explanation:
Anole lizards includes different types of lizards such as the canopy lizards, the grass lizards and the twig lizards and are found in Puerto Rico, Cuba, Jamaica, and Hispaniola.
Anole species with each of these three body types exist on each of the four islands because of interisland migration events.
The anole species share common ancestor with each other in comparison to other lizard species, interisland migration events allowed anole species to get evolved by natural selection process in different islands including Puerto Rico, Cuba, Jamaica, and Hispaniola.
Hence, the correct answer is four islands.
Use the following information to answer the following question(s).The dune-burrowing spider Seothyra sp. lives in the Namib desert on the southwestern coast of Africa. These spiders build silk-lined burrows with a sticky silk mat at the entrance to trap insect prey. While foraging during the day, the spider remains concealed in its burrow and shielded from direct sunlight when prey are not present.During the day, environmental temperatures vary from 17 to 73°C (63-164°F). If a spider is prevented from retreating into its burrow, it shows signs of thermal stress at 49°C, whereas unrestrained spiders continue to forage at temperatures above 65°C. In addition, spiders respond more quickly to prey stimuli during the hottest times of the day and capture prey in significantly less time when temperatures are above 49°C. The captured arthropods (prey) tend to succumb more quickly to hot surface temperatures; they are more lethargic and struggle less when captured at the high temperature ranges.1. Based on the information in the paragraphs, spiders are ______.a. endothermsb. ectothermsc. sometimes ectotherms and sometimes endothermsd. neither ectotherms nor endotherms2. In animals, individual cells are grouped into _____.a. organismsb. organsc. organ systemsd. tissues3. A main function of most types of epithelial tissue is ______.a. supportb. absorptionc. sensationd. covering surfaces4. Reabsorption is the movement of substances from the ______ to the ______a. blood... filtrateb. kidney... urinary bladderc. blood... nephrond. filtrate... blood5.In humans, goosebumps are a vestige of a mammalian adaptation related to ______.a. thermoregulationb. water conservationc. positive feedbackd. osmoregulation
Answer:
spiders are. generally ectotherms.Their internal temperature depends on external temperature transfer.They are also poikilothermic because the body temperature varies with that of the external environment.,
In animals, individual cells are grouped into tissues. e,g Blood. The tissues gives rise to organs.
A main function of most types of epithelial tissue is covering surfaces.They line major all hollow surfaces, and covering body surfaces.
Resorption id the movement of fluid from the glomerular filtrate back into the blood. Ions, glucose,and other escaped metabolites are returned to the blood stream.
In humans, goosebumps are a vestige of a mammalian adaptation to thermoregulation. This is a thermoregulatory mechanism to regulate the body temperature,Goosebumps emits heat, to turn the moisture from the skin to vapour. This evaporate to release this moisture, which cools the body.
Explanation:
if you denature a protein, you increase the ability to react. true or false
Answer:
False
Explanation:
Denaturing a protein involves deforming its shape by removing it from its optimum temperature, pH, salinity, etc. This decreases its efficiency because its optimum shape is not present, meaning that its ability to react is decreased.
In social psychology, the tendency for people to be less likely to offer help when they are in the presence of others than when they are not is known as: 1) negative state relief. 2) the Good Samaritan effect. 3) pluralistic ignorance. 4) the non-altruistic effect.
Answer:
3
Explanation:
you can Google all of these and add the word definition at the end of each and it will give you the definition
Which part of the chemical equation is incorrect?
Answer: Thus the coefficient of oxygen is incorrect.
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The given chemical equation for combustion of butane is
[tex]2C_4H_{10}+10O_2\rightarrow 8CO_2+10H_2O[/tex]
The balanced chemical equation for combustion of butane is :
[tex]2C_4H_{10}+13O_2\rightarrow 8CO_2+10H_2O[/tex]
Thus the coefficient of oxygen is incorrect.
Organisms adopt different strategies and structures to make sure their offspring survive. Match each species with the reproductive strategy or structure it uses. elephant Answer 1 frog Answer 2 pine cone Answer 3
Answer/Explanation:
From the diagram attached below, we can match the reproductive strategy or structure each species uses which ensures the survival of their offspring as follows:
1. Elephant => herds young in to center of group
The Elephant usually keep their young ones at the middle of the herds to prevent their young ones from being preyed on easily by predators.
2. Frog => Pduces many offspring at once to protect against high predation risk
The young one of frogs are easily preyed on by predators, and as such, to ensure more of their offspring survive, they produce so many offspring in a breeding season, in order to increase thee survival of their offspring to the next generation.
3. Pine cone => Protects offspring until environmental conditions are ideal for growth
b) Some features can only be found in plant cells. Name two of them.
1.
2.
Answer:
a cell wall, a large central vacuole
Explanation:
Most organelles are common to both animal and plant cells. However, plant cells also have features that animal cells do not have: a cell wall, a large central vacuole, and plastids such as chloroplasts.
Which term refers to the component of hemoglobin that binds oxygen?
Someone help me please with those questions please
what animal can imitate other animals
Answer:
A few species, such as the mimic octopus, have another defence mechanism. They can combine their highly flexible bodies with their colour-changing ability to accurately mimic other, more dangerous animals, such as lionfish, sea snakes, and eels.
Explanation:
What is a potential outcome if one of your father's gametes did not go through meiosis correctly and one of the chromosomes did not separate correctly? You inherited a normal amount of genetic material from your mother but inherited an extra chromosome from your father. One of your pairs of chromosomes will not be homologous. You inherited an abnormal amount of genetic material from both your mother and father. One of your pairs of chromosomes will not be homologous. You inherited a normal amount of genetic material from your mother but inherited an extra chromosome from your father. Two of your pairs of chromosomes will not be homologous. You inherited a normal amount of genetic material from both your mother and father resulting in the inheritance of a normal amount of genetic material.
Answer:
You inherited a normal amount of genetic material from your mother but inherited an extra chromosome from your father.
Explanation:
It seems logical because if you think about it. If one of your father's gametes were made incorectly and you got it you could come out looking deformed or you can have something extra.
Please let me know if I'm wrong.
Help ASAP!
During replication, the strands of a double stranded DNA separate when the bonds are broken between their paired bases.
Explain why, in terms of the genetic code, it is important that the molecule separated between the bases and not at some other point. (Remember the bases are letters that spell out specific traits for the organisms).
Answer:
During the process of replication, the double stranded DNA separates when several enzymes act to break the bond between base pairs in two strands.
There are four base pairs in DNA that includes thymine, cytosine, guanine and adenine. these bases determines DNA's instructions, or genetic code. The four bases are allowed to encode the sequence of amino acid residues in proteins by making a pair of three codons that carry genetic codes and helps on the process of transcription and translation.
For example: if the DNA sequence is having bases ATGCCGG, its complementary base pair will be UACGGCC, lets make pair of three codons UAC that codes for amino acid Tyrine and GGC codes for glycine.
Bases are components of nucleotide and nucleotide are the basic building blocks of DNA and RNA.
If DNA will separate from any other point then it will not able to carry the genetic code. hence, DNA separates between the bases only.
It is important that the molecule is separated between the bases and not at some other point because nucleotide order is fundamental to obtain two genetically identical DNA molecules.
What is DNA?DNA is a self-replicating molecule that is fundamental for life by assuring of the perpetuity of the genetic material.
During DNA replication, different enzymes act to produce two genetically identical DNA molecules.For this purpose, enzymes must copy with absolute fidelity the order of the nucleotide sequence in the DNA molecule.In conclusion, it is important that the molecule is separated between the bases and not at some other point because nucleotide order is fundamental to obtain two genetically identical DNA molecules.
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https://brainly.com/question/21265857
seaweed belongs to which earths sphere
Answer:
Biosphere
Explanation:
Biosphere is the sphere of Earth where the living beings stay.
Answer:
(B). Biosphere
Explanation:
just took quiz
Identify different carbon pools.
Answer:
Biosphere
Atmosphere
Oceans
Soil Organic Matter
Which of these is a characteristic of organisms in the domain Bacteria?
A.
They are single-celled.
B.
They contain membrane-enclosed organelles.
C.
They are multicellular.
D.
They contain a cell nucleus.
Answer:
The answer is option A.
They are single-celled.
Hope this helps.
Answer:
A
Explanation:
No cell nucleus.
Archaea is a domain that comprises of single celled microorganisms, which are prokaryotes. These organisms can survive in extremely harsh conditions like hot springs and salt water.
What have a heart but doesn’t beat
Answer:
The King of Hearts in Deck of Cards is the answer to this riddle
Explanation:
Which factor determines the direction most molecules will pass through the cell membrane
Answer: B is the answer
Explanation:
Can someone help me with this 3 questions please
Answer:
- the answer for the exercise 6 is water
- the answer for the exercise 7 is population
- the answer for the exercise 8 is ecosystem
How does filtration occur during the formation of urine ?
Each of your kidneys is made up of about a million filtering units called nephrons. Each nephron includes a filter, called the glomerulus, and a tubule. The nephrons work through a two-step process: the glomerulus filters your blood, and the tubule returns needed substances to your blood and removes wastes.
_________12. The calvin cycle begins when CO2 react with
A. Phosphoglycerate C. Glyceraldehyde-3-phosphate
B. Ribulose biphosphate D. Phosphoenol pyruvate
Answer:
B. Ribulose biphosphate
Which of the following is true about reproduction. That involves meiosis?
Answer:
Mitosis is true about reproduction that involves Meiosis. Somatic cells are segregated to produce the replica of same. This is the way skin and other body places are thoroughly replaced.
Explanation:
Answer:
Reproduction is the biological process by which new individual organisms "offspring" are produced from their "parents".
True
Explanation:
where are faeces/stool formed in human body?
Explanation:
Stool/feces is formed in The large intestine (colon or large bowel).
How is an invasive species introduces to a new ecosystem?
An invasive species is introduced to an ecosystem through a ...(fill in the black)
Answer:
.An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental
Explanation:
The result of invasive species can be very complex due to the result of economic harm the organism may cause to an environment it is not originally from if that makes sense.
consider a molecule of the polymer, polyethylene, and a protein molecule as if they were strings of beads. How would the string representing polyethylene differ from that representing a protein
Answer:
When a macromolecule contains repeated similar sub units of a particular molecule:such a repeated units are called polymers.
Therefore, polyethylene is a micromolecule of repeated subunits called ethylene formed during polymerization..Therefore, the small units joined together to form polyethylene are ethylene.These are alkene hydrocarbons,which are similar in structure with the carbon atoms linked by double bonds.When the Pi bonds of the double bonds breaks. hydrogen atoms forms free covalents bonds in all these sub units.
However, polypeptides is made of of 20 different amino acids, connected by peptides, disulfide and other bonds.Therefore the protein molecules will be different from the polyethylene and polymers. This is because each of the 20 amino acids has different R-groups, and It is this R-groups that determine the functional characteristics displayed by each amino acid sub- units.Therefore, the characteristics of a protein molecule will be determine by the type of Amino acids it contains.
Thus the beads of polyethylene will be the same, but different in proteins
Explanation:
A scientist observes the motion of a certain type of vesicle around the cell. She notices that vesicle movement ceases when colchicine is added to the culture medium. What conclusion can she draw?
Answer:
colchicine inhibits microtubule function, it is most likely that the
vesicular movement is orchestrated or produce by microtubules.
Explanation:
Microtubules is organelle in the cell which give shape to the cell and help transport vessicles, granules and some organelles inside the cell.
Colchicine is a chemical substance that inhibit microtubules function and for gout treatment.
When colchicine is added to the microtubules, vessicles movement is produce by microtubules.
