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Choice A is illogical. A single experiment does not confirm a theory as true. Multiple successful trials are needed for one to even consider a hypothesis to be accepted as a theory.
Choice B is wrong. If a scientist finds a new way to test a hypothesis, experimental methods do change. Note that when there are additional ways to test a hypothesis, a scientist should test it with additional methods.
Choice D is incorrect. If someone finds a way to test a new hypothesis, it would not be made into law since there is more information regarding the theory. This means that it would remain a theory until one can prove that it can't be tested using different methods.
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In the United States, less than 0.8% of the population has type I diabetes. Which of the following facts supports the theory that a person's risk of developing diabetes has a genetic, inherited component?
A. If one parent has type I diabetes, each child's chance of developing diabetes is between 1% and 6%.
B. If one identical twin has diabetes, the other twin has a 50-75% chance of having diabetes.
C. If both parents have type I diabetes, each child's chance of developing diabetes is between 10% and 25%.
D. all of these
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Which statements accurately describe matter? Check all that apply. Only living things are made up of matter. Matter is made up of tiny particles called atoms. Atoms were discovered in the twenty-first century. Atoms cannot be divided. A single atom can be seen only with a standard microscope.
Answers
The right options are;
Matter is made up of tiny particles called atoms, and atoms cannot be divided.
A matter is any object that has mass and occupies space (volume). All matter are made up of tiny particles known as atoms. Atoms are composed of interacting subatomic particles which are; electrons, protons, and neutrons. Matter exists in various states such as solid, liquid, and gas.
Answer:
Matter is made up of tiny particles called atoms.
Atoms cannot be divided.
Matter is defined as anything that has mass and occupies space which could be a plant or animal.
Matter is however made up of smaller/tiny particles called Atom. Matter was discovered in the seventeenth century and not in the twenty first century.
Atom however cannot be divided into smaller parts and is regarded as the smallest unit of matter although it contains some sub-atomic particles such as proton and neutron.
It can however be viewed only with an electron microscope as it is too small to be viewed by a light or standard microscope.
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Which of the following was determined by Charles Darwin but based on contributions from another scientist
A. Species can go extinct during catastrophes
B. Species could go extinct when their environment changed if they could not adapt to the change
C. The population can increase faster than the food supply
D. The processes that change organisms work quickly and have only been around for a short time
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The correct answer is option B, that is, Species could go extinct when their environment changed if they could not adapt to the change.
According to Darwin and some of the other scientists who studied the concept of evolution, extinction is usually a result of a change in environmental conditions. When conditions modify, some of the species exhibit adaptations, which permit them to reproduce and survive, while others do not.
If the environment modifies gradually, then the species at certain occasions will develop the essential adaptations, with various generations. If conditions modify more briskly than a species can develop, however, and if the individuals of that species are devoid of the trait, which is required to thrive in the novel surrounding, the probable outcome will be extinction.
Four groups of mice consume different amounts of sweetener in their food. The control group is the one that receives ____.
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Name 5 things our atmosphere does for us
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2. The atmosphere protects us and the animals from dangerous radiation from the sun.
3. The atmosphere provides oxygen for humans animals ect. to breath and CO2.
4. The atmosphere protects us from objects coming towards the earth.) hope it helps and have a good day!
sorry it took long
Farmers in areas where there are no major rivers still require water for their crops. Where do these farmers most likely obtain the water needed for their crops? Question 11 options: 1) nearby oceans 2) melting ice 3) morning dew 4) underground sources
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Oceans have saline not fresh water and morning dew would not be sufficient water.
in what direction does the shadow from a stick or sundial point at each point of the following times
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Short answer: Noon- North Morning- West Evening- East
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xplain how the study of taxonomy helps other scientists.
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Hope this helps!
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cow skin cell has 60 chromosomes. After cell division, each daughter skin cell will have....?
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Answer:
[tex]60[/tex] chromosome.
Explanation:
The skin cells divide by the process of mitosis cell division while sex cells divide by the process of meiosis cell division.
In a mitotic cell division, a parent cell divides into two or more identical cells having equal number of chromosomes. Thus, in a mitotic cell division haploid cell are produced.
Number of chromosome in daughter cell [tex]=[/tex] number of chromosome in parent cell
Therefore, after mitotic cell division, each daughter skin cell will have [tex]60[/tex] chromosome.
Write a series of paragraphs that shows your knowledge of the following: the biochemical structure of DNA, how DNA replicates, how the DNA structure forms the genetic code, and how that genetic code comes to be expressed as a phenotype.
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1. THE BIOCHEMICAL STRUCTURE OF DNA
The DNA is composed of molecules called nucleotide. Each nucleotide is made up of a phosphate group, a sugar group and a nitrogenous base. The nitrogenous bases are four in number, they are adenine, cytosine, guanine and thymine. The genetic code of a DNA molecule depend on the manner in which the bases are arranged. It has been reported that the nitrogenous bases in DNA molecules of humans is approximately 3 billion in number. Double stranded DNA is made up of two spiral nucleic acid chains, which are twisted into double helix shape. The DNA is packed into tightly coiled structure called chromatin and are stored in the nucleus of cells. Chromatin usually condense to form chromosomes during cell division.
2. DNA REPLICATION
DNA replication is the biochemical process by which two identical DNA molecules are produced from a single original double stranded DNA parent molecule. This is the basic way by which the DNA molecule makes copies of itself. This process is the basis of inheritance and it occurs in all living organisms. DNA replication is a semi conservative process, this means that, each strand in the double helix DNA acts as a template for the formation of a new complementary strand. The major enzyme that catalyses this process is DNA polymerase and other enzymes that are involved include: DNA ligase, DNA primase, DNA helicase and topoisomerase.
3. HOW DNA STRUCTURE FORM GENETIC CODE
The genetic code is the route via which the DNA molecule carry genetic information in living cells. The genetic code refers to the rules by which the genetic information that is encoded inside the DNA molecule is translated into different type of proteins by the cells of living organisms. The translation process involves the ribosomes, which links up amino acids in the specific manner specified by messenger RNA. Transfer RNA participate in the process by carrying amino acids and by reading the messenger RNA three nucleotides at a time. In genetic code, a group of three DNA bases, called codon, codes for one particular amino acid. For instance, the codon CGT codes for the amino acid alanine.
4. HOW GENETIC CODES COME TO BE EXPRESSED AS PHENOTYPE
Phenotype refers to a set of observable features of an individual, that is formed as a result of the interaction of the genotype with the environment. Examples of phenotype are: eye color, hair color, skin colour, nose shape, etc. The genotype refers to the set of genes in a DNA, which is responsible for a particular trait in a man.The phenotype is the physical expression of that trait. Each gene in living organisms typically code for a particular trait, for exmaple eye color. Each gene have different alleles, which code for the same trait.The allele may be dominant or recessive. The phenotype that will eventually be formed will depend on the whether the alleles are dominants or recessive.
1. In pea plants, purple flower color is dominant to white flower color. If a homozygous dominant flower mates with a white flower, what is the chance of having white flowered offspring?
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"AB84"
How do the main sequence stages of these two sizes of stars differ?
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Explanation:
Even apart from how bright they appear, which is affected by how far they are from us, stars come in a tremendous range of sizes. So stars aren't all the same mass because the clouds from which they condense are not all the same mass.
The main sequence stages of these two sizes of stars differ in their actual distance from the surface of the earth and their ability to condense the mass of the clouds.
How the brightness of a star is determined?The brightness of a star is determined by the fact that the distance from the earth. If you take a star and move it twice as far away, it would definitely appear 1/4 as bright. The larger the star is, the more energy is put out in order to liberate its brightness.
The sizes of the stars may vary a lot. This means that they have different distances and brightness from the earth. So, all stars do not occupy the same mass. This is because the clouds from which they condense or are covered may not possess not the same mass.
Therefore, the main sequence stages of these two sizes of stars differ in their actual distance from the surface of the earth and their ability to condense the mass of the clouds.
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Using the periodic table and your knowledge of atomic structure. Compare the number of electrons in a Carbon-12 and Carbon-14 isotope.
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The difference between Carbon-12 and Carbon-14 is that Carbon-12 has 6 electrons and Carbon-14 has 8 electrons.
During which process is mRNA converted into a sequence of amino acids for protein production?
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~ Mark Brainliest if you find this helpful
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The process wherein mRNA is translated into a protein is known as translation, a critical phase of protein synthesis occurring in the cytoplasm where ribosomes synthesize polypeptide chains that fold into functional proteins.
Explanation:The process in which mRNA is converted into a sequence of amino acids for protein production is known as translation. During translation, the cellular machinery interprets the nucleotide sequence of mRNA to produce a chain of amino acids, which then fold into functional proteins. Translation occurs in the cytoplasm, where the ribosomes facilitate the assembly of amino acids into polypeptides.
The mechanism of translation involves several key steps:
The activation of amino acids, preparing them for incorporation into the protein chain.tRNA molecules match specific amino acids to corresponding codons on the mRNA template.As tRNAs bring amino acids to the ribosome, the ribosome catalyzes the formation of peptide bonds between amino acids, elongating the polypeptide chain.The ribosome moves along the mRNA strand, synthesizing the protein until it reaches a stop codon, which signals the end of the translation process.Finally, the newly synthesized polypeptide chain folds into its functional three-dimensional structure.Each codon, a triplet of nucleotides within the mRNA, specifies a particular amino acid. The genetic code underpinning this process is nearly universal across all life forms, reflecting the fundamental role of proteins in biology.
Which of the following best describes our MRNA is produced?
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Answer:
DNA provides a template for RNA polymerase.
Explanation:
Describe what is happening in each stage and what each stage looks like:
Prophase
Prometaphase
Metaphase
Anaphase
Telophase
Cytokinesis
Describe the purpose of mitosis.
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Answer:
Mitosis is a type of cell division which produces two genetically similar daughter cells. This is involved in the cells of growth of somatic cells in an organism which has to to be produced with the same genetic material. It is also involved in the asexual mode of reproduction as it produces clones with the same genetic material such as in angiosperms.
Mitosis is divided into two phases- karyokinesis and cytokinesis where karyokinesis is divided into 4 stages which can be easily marked as:
Prophase- chromatin condensation, nuclear envelope disappears. Prometaphase- chromatin condenses to form a packaged structure called chromosomes. Metaphase- chromosomes align at the equatorial plate of the cell, chromosomes highly condensed. Anaphase- chromosomes start separating, each chromatid moves towards the opposite pole of the cell. Telophase - cytokinesis begins, nuclear envelope reappears. Cytokinesis- cell division by the appearance of cell furrow in animal cells and cell plate in plant cells.can you list six physical properties
and 2 chemical properties of this picture Hurryy!!
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Which of the following describes how blood helps to maintain homeostasis by working with the immune system?
By having white blood cells to attack pathogens
By delivering oxygen to cells so they can divide
By delivering nutrients from food to cells
By carrying waste to the kidneys
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Answer:
i just took the test, its A
Explanation:
A liver cell must create a protein to carry fats through the body. Where would the instructions be found?
A) Brain
B) Nucleus
C) Hormone
D) Enzyme
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B) Nucleus its B@@@@@@@@@@@
A gene is a region of DNA that contains instructions for the manufacture of?
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Commercial fishing in certain parts of the ocean decreases the number of small fish. As a result, large fish and sharks...
are negatively affected because there is less oxygen in the water.
are positively affected because the small fish polluted the water.
are negatively affected because they feed on the small fish.
are positively affected because there is more space.
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after being vaccinated, many children are treated for fever. this is not considered a danger or harm. why might this happen?
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4). A particular bird species found in North America obtains most of its food energy by catching and eating insects. A mutation arises in this bird population that increases the length of its beak. Although many mutations are harmful, this particular mutation has increased the ability of the bird to catch and eat certain insects. Which of these is the MOST LIKELY outcome of this mutation?
A) The insects that are eaten by this bird are likely to become extinct.
B) Sharp pointed beaks will result in the birds eating other more unusual food items.
C) Other bird species will be more likely to also develop pointed beaks in order to compete.
D) Individual birds with the mutation will be more likely to survive and reproduce than birds without the mutation.
5). In 1831, Charles Darwin visited the Galapagos Islands. While observing the giant land tortoises that lived on these islands, Darwin noted that the shape of the tortoise shell varied depending on which island the tortoise lived. Tortoises on one island had round shells, for example, whereas tortoises on a neighboring island had more flattened, saddle-shaped shells. Which statement BEST summarizes Darwin's explanation for these differences?
A) Random mutations caused the shape of the shells to fluctuate periodically.
B) The shape of the tortoise shell varied because the predators on the islands were all similar.
C) The particular shape of the shell was best suited for the island on which the tortoise was living.
D) Tortoises who used their shells in special ways caused the shells to become larger, rounder, or flatter.
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Number 5. The answer should be "D"
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The most likely outcome of this mutation is that other bird species will be more likely to also develop pointed beaks in order to compete. Thus, the correct option for this question is C.
The statement best summarizes Darwin's explanation for these differences is that the tortoises that used their shells in special ways caused the shells to become larger, rounder, or flatter. Thus, the correct option for this question is D.
What is Mutation?A Mutation may be defined as the sudden, stable, and inheritable changes in the genetic material of an organism due to the significant impact of mutagens.
When a particular bird species increases the length of its beak due to mutation, other bird species of this region also require to increase their beak's length in order to compete better for their resources and reduce the chances of extinction.
According to Darwin, the differences in the shells of the tortoises arise due to the utilization of their shells in special ways. This facilitates the shells to become larger, rounder, or flatter.
Therefore, both questions are well described above one by one.
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The germ theory of disease states that many diseases are caused by the presence and action of specific
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Answer:
Microorganisms
Explanation:
which is the substrate, enzymes and products for this equation? Is lactase used up in the reaction?
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The enzyme is lactase.
The products are glucose and galactose.
FALSE.
because The substance lactase is NOT used up in the reaction. It remains chemically unchanged at the end of the reaction.
What is the difference between the revolution and rotation of the Earth and the revolution and rotation of moon
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Hope this helps!
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Explain why crops in the Arctic grow larger than normal during the summer months.
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Answer: Sunlight.
Explanation:
Crops in the Arctic region grows more in summer season because there is more absorption of sunlight by the leaves and other parts of the body.
More sunlight favors the growth of crops and due to this reason the crops in the summer season grows better than in winters.
Plants requires adequate amount of sunlight for their growth and development and during winters plants do not receive more sunlight.
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Assignment: Using Punnett Squares Exploration
First Cross
Genotypic ratio:
Phenotypic ratio:
Second Cross
Genotypic ratio:
Phenotypic ratio:
Third Cross
Genotypic ratio:
Phenotypic ratio:
Questions
1. What conclusions can you draw about the results of your first cross between a homozygous red bull (RR) and a heterozygous red cow (Rr)?
2. What conclusions can you draw about the results of your second cross between a heterozygous red bull (Rr) and a heterozygous red cow (Rr)?
3. What conclusions can you draw about the results of your third cross between a homozygous white bull (rr) and a homozygous white cow (rr)?
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Therefore:Crossing results in 50% (dominant homozygote) and 50% (dominant heterozygote).
b)
Therefore:Crossing results in 25% (dominant homozygote), 50% (dominant heterozygote) and 25% (homozygous recessive).
c)
Therefore:Crossing results in 100% (homozygous recessive).
Answer:
a)
R R
R RR RR
r Rr Rr
Genotypic ratio: RR : Rr = 2 : 2 = 1: 1
Phenotypic ratio: homozygous red bull (RR) : heterozygous red cow (Rr) = 2:2 = 1: 1
b)
R r
R RR Rr
r Rr rr
Genotypic ratio: RR : Rr:rr = 1:2:1
Phenotypic ratio: homozygous red bull (RR) : heterozygous red cow (Rr) : homozygous white bull (rr) = 1: 2: 1
c)
Xr Yr
Xr Xr Xr Xr Yr
Xr Xr Xr Xr Yr
Genotypic ratio: Xr Xr: Xr Yr = 2: 2 = 1: 1
Phenotypic ratio: homozygous white cow (Xr Yr) : heterozygous white bull (Xr Yr) = 2: 2 = 1: 1
Explanation:
a)
First cross is between a a homozygous red bull (RR) and a heterozygous red cow (Rr)
This shows that "Red" color is a dominant trait
So the cross between Rr and RR is
R R
R RR RR
r Rr Rr
Genotypic ratio: RR : Rr = 2 : 2 = 1: 1
Phenotypic ratio: homozygous red bull (RR) : heterozygous red cow (Rr) = 2:2 = 1: 1
b)
Cross between a heterozygous red bull (Rr) and a heterozygous red cow (Rr)
R r
R RR Rr
r Rr rr
Genotypic ratio: RR : Rr:rr = 1:2:1
Phenotypic ratio: homozygous red bull (RR) : heterozygous red cow (Rr) : homozygous white bull (rr) = 1: 2: 1
c)
Cross between a homozygous white bull (rr) and a homozygous white cow (rr)
Xr Yr
Xr Xr Xr Xr Yr
Xr Xr Xr Xr Yr
Genotypic ratio: Xr Xr: Xr Yr = 2: 2 = 1: 1
Phenotypic ratio: homozygous white cow (Xr Yr) : heterozygous white bull (Xr Yr) = 2: 2 = 1: 1
Organisms belonging to the Kingdom Eubacteria, Kingdom Archaebacteria, and some organisms in the Kingdom Protista are unicellular. What is it that places them into different kingdoms?
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Some traits, such as earlobe attachment, blood type, and the presence or absence of dimples, have limited variation throughout the human population because they are controlled by a single gene. Other traits, such as skin color and human height, are widely variable throughout the human population because
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They are controlled by more than one gene
Answer:
The correct answer would be "they are polygenic traits".
Polygenic traits are those which are controlled by at least two different genes.
As more than two genes are involved in controlling a single trait, so they show more variations as compared to the traits which are controlled by a single gene.
For example, height is controlled by at least three genes and thus six alleles are involved in regulating height.
Polygenic traits often show a bell-shaped curve in a population.