The lactase-persistence mutations are roughly as old as the oldest milk-holding vessels or pots.
Lactase persistence:
Lactase persistence is an example of natural selection, which can cause some humans to continue the activity of the lactase enzyme in adulthood also.
The hereditary examinations and studies propose that the established mutation related to lactase persistence began a long time back, in populaces that started domesticating and dairy cultivation during the Neolithic age when pastoralist populaces started to utilize milk for their livelihood. As found and studied that “the lactase-persistence mutations are roughly as old as the oldest milk-holding vessels.” The cultural and social activities of dairying and drinking non-human milk gave an environment wherein lactase persistence was favorable. DNA proof demonstrates that mutation in the lactase gene emerged in these populaces around a similar time.
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What is the end result of cytokinesis from a cell undergoing mitosis?
The end result of cytokinesis indicates the two cells with identical copies of DNA arise from a single parental cell.
What is Cytokinesis?Cytokinesis may be defined as the process of separation of the cytoplasm at the end of mitosis.
Cytokinesis is the phase of mitosis which involves the overall division of cytoplasm and the construction of two copies of cells with identical DNA content.
It occurs after the process of karyokinesis, which results in the formation of two daughter cells from a single parental cell.
Therefore, it is well described above.
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what is meant by acropetal succession?
Answer:
according to the internet: it refers to the arrangement of flowers, where the older flowers are present at the base and younger flowers are present at the highest point. in the centripetal succession, the younger flowers are present at the center and older flowers are present towards the periphery.
Explanation:
Explanation:
It is a type of inflorescence (pattern of arrangement of flowers) in which, younger flowers are present at the tip while older ones are located at the base. This type of succession is found in racemose inflorescence.Which is a major factor in determining what decisions to make when seeking help for domestic violence
The decisions affect the safety of the victim is the major factor in making decisions on how to seek help for domestic violence.
What is domestic violence?Domestic violence refers to violence that occurs in the home.
Domestic violence may occur in the following scenarios:
between husband and wife
between parents and childrenbetween children themselvesDomestic violence poses great harm to the victim.The major factor in determining what decisions to make when seeking for domestic violence is how the decisions affect the safety of the victim.
Which is a major factor in determining what decisions to make when seeking help for domestic violence? How financially stable the couple is How much the abuser loves the victim How much the victim loves the abuser How do the decisions affect the safety of the victim
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What discovery in the 1900s supported Mendel's ideas?
Answer:
The discovery of Chromosomes
Explanation:
One cause of the Love Canal crisis was the:
sewage leaking into the ocean.
corroded pipes poisoning the water with metal.
U.S. Army dumping hazardous waste.
local cities dumping municipal waste.
One cause of the Love Canal crisis was the U.S. Army dumping hazardous waste and local cities dumping municipal waste.
What lead to the Love Canal crisis?The explosion is known to be one that was influence by a record of large amount of rainfall.
So therefore, One cause of the Love Canal crisis was the U.S. Army dumping hazardous waste.
Note that the canal was made into a kind of municipal and industrial chemical dumpsite.
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Assertion (A): Mutations can be passed on to the offspring.
Reason (R): Mutation is capable of affecting large sections of DNA or certain points along the DNA strand.
Which of the following is true for the above statements?
A. Both (A ) and (R) are true, but (R) is not the correct explanation of A.
B. Both (A ) and (R) are true, and (R) is the correct explanation of A.
C. A is false, but (R) is true.
D. A is true, but (R) is false.
Answer:
Both A and R are true. And R is the correct explanation of A.
Both (A) and (R) are true, but (R) is not the correct explanation of A. The correct answer is A. Mutations can be passed on to the offspring, but their ability to affect large sections of DNA does not directly explain their inheritance.
It is true that mutations can be handed on to the next generation, as stated in assertion (A). Genetic diversity can result from germ cell DNA mutations that are passed down to the following generation.
It is also true, as stated in Reason (R), that mutations can have an impact on significant portions of DNA or specific locations along the DNA strand. Point mutations are modifications to a single nucleotide, whereas deletions, insertions, and duplications alter larger portions of DNA.
However, (R) is not the accurate justification for (A). Although enormous portions of DNA or precise locations along the DNA strand can be affected by mutations, this knowledge does not immediately explain why mutations can be passed on to the next generation.
Thus, the correct option is A.
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how has molecular evidence helped support fossil evidence in determining the early ancestor of modern-day whales
The early ancestors of modern day whales have been determined by the help of comparison of milk protein.
The comparison of milk protein of the whales has confirmed that the ancestors of modern day whales lived on land.
Fossil records are very important as they provide information about the past . Through the fossil records one is able to understand about the organisms and their ancestors.It is possible to know about the structure, food habits and the environment they lived in of the ancestors.
Molecular evidence is that evidence which is the information found from the DNA of all living beings.
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What is produced in a lymph node?
Answer:
The lymph nodes monitor the lymph flowing into them and produce cells and antibodies which protect our body from infection and disease.
Explanation:
Lymph nodes protect out body from infection and diesease
I WILL MARK YOU BRAINLIEST IF U ANSWER THIS QUESTION.
Why are the frog lungs stretchy/elastic?
Answer: Frogs have a moist, permeable skin, which can transfer gasses such as carbon dioxide and oxygen.
Explanation:
The lungs feel spongy because of the millions of alveoli inside them. The alveoli are tiny air sacs that have pores in them to allow for the diffusion of oxygen. This porous structure of the lungs makes them very similar to the actual makeup of a real sponge.
Which of the following would be expected in response to a growth signal activating Ras that is sustained?
apoptosis first, then cell cycle, then cell growth
cell cycle first, then cell cycle arrest, then metabolism
metabolism first, then apoptosis, then DNA replication
cell growth first, then DNA replication, then cell cycle arrest
The expected outcome for growth signal activating Ras is cell growth first, then DNA replication, then cell cycle arrest (Option 4).
What is the growth signal activating Ras?The growth signal activating Ras is a signaling pathway associated with cell differentiation.
The growth signal activating Ras promotes the cell cycle through different types of growth factors.
In conclusion, signal activating Ras activates cell growth first, then DNA replication, then cell cycle arrest (Option 4).
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Short fibers that branch out from the cell body and receive incoming messages are called.
Answer:
Pain receptors or receptors
Explanation:
A substance will have a relatively rigid, unchanging shape in which of these state. liquid. plasma. gas. solid.
Answer: Solid
Explanation: a solid has its own shape and volume due to strong intermolecular (IM) attraction making it rigid.
a liquid has a volume but no shape due to relatively weak IM force, making it take the shape of the container it's in.
gases have no shape or volume due to even weaker IM force.
plasma can be considered a gas but it has charged particles and ions. so the answer is Solid due to strong IM force.
In one 24-hour period, the kidneys of an average-sized healthy adult filter approximately ________ through their glomeruli into the tubules.
In 24 hours, kidneys filter approximately 150-180 liters of blood plasma through their glomeruli into the tubules.
How do kidneys work?Each of your kidneys is made up of about a million filtering units called nephrons. Each nephron includes a filter (glomerulus) and a tubule.The glomerulus filters your blood and the tubule returns needed substances to your blood and removes wastes.Blood flows into your kidney through the renal artery which branches into small blood vessels which enter the nephron.In nephron, blood is filtered by the tiny blood vessels of the glomeruli and then flows out of your kidney through the renal vein.Blood circulates through your kidneys many times a day. In a single day, your kidneys filter about 160 liters of blood. Most of the water and other substances that filter through your glomeruli are returned to your blood by the tubules. Only 1 to 2 liters become urine.Learn more about nephrons here:
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For the genomics division, Mother Goose is planning to replace the old system by the new one all at once. This is called a ____ conversion.
For the genomics division, Mother Goose is planning to replace the old system by the new one all at once. This is called a Phased conversion.
What is genomics division?The discrepancy between the genomic data that is available for those with a European ancestry and that for those with an Indigenous ancestry.
What are the categories of genomics?Structural genomics.Functional genomics. Comparative genomics.What is the purpose of genomics?The study of individual genes and how they affect heredity. Instead, the goal of genomics is to characterize and quantify all genes collectively.
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If a set of genes is induced in the presence of the controlling substance, it is referred to as __________ control.
If a set of genes is induced in the presence of the controlling substance, it is referred to as positive control.
Genes are known as the basic unit of heredity. They contain a sequence of nucleotides which is responsible for the formation of a gene product that is functional.
The functional gene product is formed by the process of gene expression. In gene expression, there is first the formation of RNA from DNA by the process of transcription and then there is formation of a functional gene product by the process of translation from the RNA.
In the positive control, the expression of genes takes place only in the presence of a controlling substance that is known as an activator.
The set of genes are induced only in the presence of an activator, when there is positive control. The gene is not expressed in the absence of the controlling substance.
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During sporulation in Bacillus subtilis, the response regulator that positively controls many genes needed for sporulation and negatively controls genes not needed during sporulation is _________. Multiple Choice SpoOB SpoOA SpoOF SpoO
During sporulation in Bacillus subtilis, the response regulator that positively controls many genes needed for sporulation and negatively controls genes not needed during sporulation is SpoOA.
In Bacillus subtilis, sporulation entails asymmetric cell division followed by differentiation into the mother cell and the endospore. Numerous proteins make up the endospore coat, a thick shell that shields the bacterial DNA from stress.Spo0A, a transcription factor from the response regulator family, controls gene transcription at the start of sporulation in Bacillus subtilis. Traditionally, Spo0A has been thought to as the main regulator for entry into development.The primary regulator of sporulation, the transcription factor Spo0A, is phosphorylated as a result of the activation of histidine sensor kinases (such as KinA, KinB, and KinC), which shuttle phosphate via an extended phosphorelay.learn more about sporulation here: https://brainly.com/question/19279444
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How many different tripeptides can be formed from three different amino acids, methionine, histidine, and arginine
27 different tripeptides can be formed with three different amino acids (methionine, histidine, and arginine).
This can be simply calculated by formula [tex]x^{y\\[/tex] where "[tex]x[/tex]" represents no. of amino acids & "[tex]y[/tex]" represents the length of peptide.
In this case, [tex]x[/tex]= 3 & [tex]y[/tex]=3
Hence, Total no. of tripeptides = [tex]3^{3}[/tex] = 3×3×3 = 27
All the possible different tripeptides from methionine(M), histidine(H), and arginine(R) are as follows:
Case 1: If all the three amino acids are same,
1) MMM 2) HHH 3) RRR
Case 2 : If two amino acids are same & one amino acid is different,
1)) MMH 2) MMR 3) HHM 4) HHR 5) RRM 6) RRH 7) MHM 8) HMH 9) MRM 10) HRH 11) RHR 12) RMR 13) HMM 14) RMM 15) MHH 16) RHH 17) MRR 18) HRR
Case 3: If all the amino acids are different,
1) MHR 2) MRH 3) HMR 4) HRM 5) RMH 6) RHM
So the total possibilities are = 3+18+6 = 27
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How can mutations in gametes become widespread in the gene pool?
Answer:
They affect the gametes (or genes that, unlike somatic cell mutations, can be passed down to offspring) of each individual or descendant after the original individual who acquired the mutation.
Answer:
Random, spontaneous mutations constantly generate new alleles in a gene pool, destabilizing genetic equilibrium and creating the potential for adaptation to changing environments. In multicellular organisms, only mutations that affect germ cells become part of the gene pool.
Explanation:
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Just wanted to know after doing my test at school.
Are amino acids really acids?
Amino acids are acids on one hand, and a base on the other hand.
What is an acid?An acid is a substance that produces hydrogen or hydroxonium ions as the only positively charged ion when it ionizes.
All amino acids have an amine group -[tex]NH_2[/tex] and a carboxylic group -[tex]COOH[/tex].
The carboxylic group ionizes such that:
[tex]COOH -- > COO^- + H^+[/tex]
The presence of the amine group enables amino acids to also act as a base.
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The blue color of the sky results from scattering of sunlight by air molecules the blue light has a frequency of 7.5x10^14Hz calculate the wavelength (in meters) associated with this radiation
Answer:
Explanation:
Electromagnetic waves all travel at the speed of light when in vacuum, and essentially this same speed in normal air. Since wave speed is product of frequency and wavelength, c = f λ and λ = c/f = (3.00 x 108 m/s) / (7.5 x 1014 Hz) = 4.00 x 10-7 m = 400 x 10-9 m = 400 nm.
Your task is to convince this child that they are related to a fish. The kid is in 6th grade, so make sure you explain it in terms that they can understand. Your explanation will either be a persuasive essay or a flipgrid video.
In your explanation you must include:
Your claim, clearly stated
What natural selection is
How individuals within a population can have specific traits that give them a competitive advantage for resources over other individuals in the species.
How natural selection AND changes in an environment contributes to adaptation.
How adaptation of species over time contributes to evolution.
Explain how at least 3 lines of evidence (Fossil record, DNA sequences, Anatomy and Embryology) provides evidence of common ancestry.
Observations of patterns seen in Fossil record, DNA sequences, Anatomy or Embryology that can help explain your argument.
Multiple sources of evidence and detailed reasoning to convince the child that they are related to a fish.
Answer:
I don't know I don't know I don't know I don't know I don't know I don't know I don't know I don't know I
Individuals with beneficial traits are more likely to survive and reproduce.
Individuals within a population can have different traits because of genetic variation.
Individuals with beneficial traits are more likely to survive and reproduce in a changing environment.
Species become more different from their ancestors over time.
Fossil record shows that different species have evolved over time; DNA sequences show that different species share similar genes; Anatomy and embryology show that different species have similar structures.
The fossil record shows that fish evolved into amphibians, which evolved into reptiles, which evolved into mammals; DNA sequences show that humans and fish share many similar genes; The embryos of humans and fish have many similar structures.
1. Natural selection is the process by which individuals with certain traits re more likely to survive and reproduce than individuals with other traits. This is because the individuals with the beneficial traits are better able to compete for resources, such as food and mates.
2. This means that there are different versions of genes in the population. Some of these genes give individuals an advantage, such as being able to swim faster or see better.
3. Natural selection and changes in the environment can both contribute to adaptation. For example, if the environment becomes warmer, then individuals with traits that help them to cool down, such as sweating, will be more likely to survive.
4. The adaptation of species over time is what drives evolution. As species adapt to their environment, they become more different from their ancestors. Over millions of years, these differences can become so great that the species are no longer recognizable as being related.
5. There are many lines of evidence that support the theory of common ancestry. Three of the most important lines of evidence are the fossil record, DNA sequences, and anatomy and embryology. The fossil record shows that different species have evolved over time. DNA sequences show that different species share similar genes. Anatomy and embryology show that different species have similar structures and development.
6. Some observations of patterns seen in the fossil record, DNA sequences, anatomy, and embryology that can help explain the argument that humans are related to fish:
The fossil record shows that fish evolved into amphibians, which evolved into reptiles, which evolved into mammals. This shows that humans share a common ancestor with fish.DNA sequences show that humans and fish share many similar genes. This is because all of these species share a common ancestor.The embryos of humans and fish have many similar structures. This is because all of these species share a common ancestor.These sources include the fossil record, DNA sequences, anatomy, and embryology. I have also provided detailed reasoning to explain how these lines of evidence support the theory of common ancestry.
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What is the peculiarity of Gymnosperms?
Gymnosperms are the vascular plants that produce seeds produced over the reproductive structure but are not enclosed in the fruits and are found in the cones.
What are Gymnosperms?Gymnosperms are the plant variety that reproduces in the form of exposed ovules or seeds that are not enclosed but are not visible till maturity. They are generally of short height and have tap roots.
They are heterosporous as they bear two types of spores, microspores, and megaspores. Also, they lack beautiful flowers and are pollinated through the wind. The seed produced as a result has haploid endosperms without any covering.
Therefore, the gymnosperms do not have their seeds enclosed.
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True or False. In pernicious anemia, oxygen depletion in the body becomes apparent withing the first 6 months of life.
False, pernicious anemia may take up to 5 years to show symptoms. However, the oxygen starts to get depleted within the first 6 months in thalassemia major.
Pernicious anemia:
In this condition, the body is unable to absorb vitamin B12 which leads to lowered amount of red blood cells which are responsible for carrying oxygen throughout the body. It is an autoimmune disease in which antibodies attack their own cells in the lining of the stomach which affects the absorption of vitamin B12. The symptoms of pernicious anemia are dizziness, fatigue, diarrhea, constipation, breathlessness, and loss of appetite. The depletion of oxygen is seen in thalassemia major within 6 months.
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Darwin worked on his ideas about natural selection for two decades without publishing them when he received a letter from ______ who had independently developed the same hypothesis.
Darwin worked on his ideas on natural selection for two decades without publishing them when he received a letter from Alfred Wallace who had independently developed the same hypothesis.
What did Alfred wallace write?In June 1858, Darwin received a letter from the young Alfred Wallace, who was working in the East Indies, and in this letter Wallace asked Darwin to evaluate a paper and, if he considered it relevant, forward it to Lyell.
With this information, we can conclude that natural selection is the process proposed by Charles Darwin and Alfred Wallace, the two responsible for the theory of evolution by natural selection.
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The hydrosphere is comprised of
The hydrosphere is comprised of all the water on a given planet.
This includes all water on the surface, underground, and in the air, including water in its liquid, vapor, or ice forms.
On Earth, for example, some parts of the hydrosphere include water vapor in the air, water in the oceans, and groundwater in wells, along with much more.
give me the seven basic life prossess
A commensal bacterium Group of answer choices does not receive any benefit from its host. is beneficial to its host. may also be an opportunistic pathogen. does not infect its host. is beneficial to, and does not infect, its host.
A commensal bacterium does not infect its host, which is option D. Details about commensalism can be found below.
What is commensalism?Commensalism is a kind of relationship that involves the sharing of the same environment by two organisms where one species benefits and the other is unaffected.
For example, barnacles on whales is a commensalistic relationship.
According to this question, a commensal bacterium will not affect or harm it's host by infect it neither will it benefit its host.
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In Dendrobates frog species, some individuals produce only large, energy rich gametes and other individuals produce only small gametes with minimal energy reserves. Large gametes are not compatible with other large gametes and small gametes are not compatible with other small gametes. This species is clearly___________.
This species is clearly Anisogamous.
What are anisogamous species?
Anisogamy is a type of sexual reproduction in which two gametes with different sizes and/or forms are fused together. The larger gamete is often an egg cell, whereas the smaller gamete is a male sperm cell. The majority of multicellular creatures exhibit anisogamy.
In humans, for instance, the male gamete sperm is smaller and more mobile, whereas the female gamete egg is larger and less mobile.
In anisogamy, small gametes are not compatible with other small gametes, and neither are large gametes with other large gametes.
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If the last full moon was on apirl 4th when can you expect to see the next full moon
Answer:
Look it up
Explanation:
If you look up something than you might be able to find an answer….
A mating between a purebred purple-flowered pea plant and a purebred white-flowered pea plant would produce a(n) ______.
A mating between a purebred purple-flowered pea plant and a purebred white-flowered pea plant would produce a Hybrid.
In human genetics, assortative mating is a type of nonrandom mating in which pair connections are created based on phenotype (observable characteristics).
A statistical link between genotype and phenotype predicts a physical characteristic in a person or an anomaly in a patient with a specific mutation or a collection of mutations that are related to it.
The genotype of a purebred purple flowered pea plant will be PP
while the genotype of purebred white-flowered pea plant will be pp.
on crossing
PP X pp
Pp, Pp, Pp, Pp (offspring)
hence all the offspring produced will be hybrids.
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