Answer:
Corn is a crop that originated from a wild grass called teosinte, which was originally grown in central Mexico about 9000 years ago. The first corns were small and had only a few kernels, and they were mostly used for their stalks and leaves rather than their grains. Over thousands of years of selective breeding, humans transformed teosinte into the modern-day corn plant.
Early farmers selected and saved the largest and most productive teosinte plants, which had more kernels and larger ears. Over time, this led to the development of larger and more productive corn plants. Farmers continued to select for traits like size, sweetness, and yield, and eventually, different varieties of corn with unique characteristics were developed.
In addition to selective breeding, Native American farmers also practiced companion planting, which involved planting beans, squash, and other crops alongside corn. These plants helped provide nitrogen to the soil and deter pests, which helped improve the quality and yield of the corn.
Over the past 1,000 years, humans have continued to selectively breed and improve corn, resulting in the development of hybrid corn varieties that are even more productive and disease-resistant than their ancestors. Today, corn is one of the most important crops in the world, with a wide range of uses in food, animal feed, fuel, and other industries.
People discovered long ago that cross pollination of certain plant varieties could improve farm crops' flavor. Answering which question BEST helps people to produce crops with desired flavors?
A
How does cross pollination produce unique offspring with different flavors?
B
Which plants need to be selected for breeding to produce the best-tasting offspring plants?
C
Which genes in plants code for a sweet flavor?
D
How does artificial selection of crops affect surrounding crops?
Which plants must be chosen for breeding in order to generate the offspring plants with the best flavour are Cross-pollination of specific plant kinds was long known to enhance the flavour of farm produce.
What strategies do plants employ to promote cross-pollination?Plants have developed a variety of sophisticated strategies for luring pollinators. These techniques include trapping, mimicry, fragrance, food, and visual signals.
Explain your approach to preventing cross-pollination.In order to generate healthy seeds, plants that are wind- or insect-pollinated require pollination from blossoms on other plants (of the same or different types). You would need to plant various types at least 100 yards (91 metres) apart to prevent cross-pollination.
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For each animal listed, select the phylum to which it belongs.
starfish
crab
snail
shark
earthworm
Answer:The phylum of animals given below:
Starfish: echinoderm
Crab: arthropod
Snail: mollusk
Shark: chordate
Earthworm: Annelida
Explanation:
rizz god fr
In the genetic code, a sequence of nucleotides
in constitutes a(n) __, which specifies a
particular amino acid.
In the genetic code, a sequence of nucleotides in constitutes codon, which specifies a particular amino acid.
What is genetic code?Genetic code is the set of instructions in a living organism's DNA that tell cells which molecules to make. It is comprised of nucleotides, which are the building blocks of DNA and RNA. These nucleotides are organized into codons, which are three-nucleotide sequences that code for a specific amino acid or stop signal. The sequence of codons along a strand of DNA determines the sequence of amino acids in a protein, which determines the protein's function. Genes are the stretches of DNA that contain the information for making proteins, and the genetic code is the set of rules by which that information is translated into proteins.
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In the genetic code, a sequence of nucleotides in constitutes a(n)___, which specifies a particular amino acid.
Sickle cell disease is a recessive disorder. If both parents are carriers (heterozygous) of sickle cell, what is the chance that their offspring will inherit the sickle cell disorder?
100%
75%
50%
25%
0%
Answer:
25%
Explanation:
Both parents are heterozygous, and it is stated that the sickle cell disease is a recessive disorder. This means that, as long as there is a dominant trait present, the sickle cell will not be seen on the individual that inherits it (though they may have a chance of carrying it. Set the Punnett Square. Remember that heterozygous means that they are carriers (Aa):
[tex]\left[\begin{array}{ccc}&A&a\\A&AA&Aa\\a&Aa&aa\end{array}\right][/tex]
In the given Punnett Square, the dominant trait is found in 3 of the 4 possible offspring pairs. This means that the chance the offspring will inherit (and show) the sickle cell disorder is 25%, while the chance of them being recessive carriers is 50%, and the possibility of having no trait is 25%.
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1.) did the contribution of Jennifer Doudna impact the world of math and/or science?
2.) did the contribution of Jennifer Doudna help the people? If so, how?
3.) what contribution of Jennifer Doudna did she make to the world of mathematics and/or science?
Answer:
1. Yes, the contribution of Jennifer Doudna has had a significant impact on the world of science, particularly in the field of molecular biology. She co-developed a groundbreaking gene-editing tool called CRISPR-Cas9, which is considered one of the most important scientific breakthroughs of the 21st century. This tool allows scientists to precisely cut, edit, and manipulate DNA, which has important implications for treating genetic diseases and advancing scientific research.
2. Yes, Jennifer Doudna's contribution has helped people in various ways. For instance, her work on CRISPR-Cas9 has the potential to revolutionize the treatment of genetic diseases, such as sickle cell anemia, cystic fibrosis, and Huntington's disease. It also has the potential to improve the yield and quality of crops, which can help to address issues of food insecurity and environmental sustainability.
3. Jennifer Doudna's primary contribution is the co-development of CRISPR-Cas9, a gene-editing tool that has transformed the field of molecular biology. CRISPR-Cas9 allows scientists to make precise edits to the genome, which has a wide range of applications in fields such as medicine, agriculture, and biotechnology. Jennifer Doudna's work on CRISPR-Cas9 has earned her numerous awards and accolades, including the 2020 Nobel Prize in Chemistry.
Explanation:
your welcome
NEED HELP WITH 1, 2, AND 3 ASAP 15 POINTS
From the cell energy test:
Letter on the diagram representing chemical energy in the form of ATP energy is C.Organelle that converts solar energy into stored chemical energy in the bonds of glucose is A.Name of the process in which C₆H₁₂O₆ is synthesized using CO₂ and H₂0 is B.What is chemical energy in the form of ATP energy?Chemical energy in the form of ATP (adenosine triphosphate) energy refers to the energy stored in the high-energy phosphate bonds between the three phosphate groups of ATP molecules.
When ATP is broken down, energy is released, which can be used by cells to perform various cellular processes and functions. ATP is often referred to as the "energy currency" of the cell, as it provides the necessary energy for metabolic reactions, muscle contraction, and other essential cellular functions.
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Which of the following is NOT a piece of information that forensic scientists should include on the label of a drug found at a crime scene?
O A. where the drug was found
О в.
the forensic scientist's opinion of what happened at the crime scene
O C.
the condition of the drug when it was found
O D. the results of any presumptive drug tests done at the scene
Explanation:
The answer is B. the forensic scientist's opinion of what happened at the crime scene.
Forensic scientists should not include their opinion of what happened at the crime scene on the label of a drug found there, as this is not a factual piece of information that can be determined by scientific analysis. The label should include where the drug was found, the condition of the drug when it was found, and the results of any presumptive drug tests done at the scene, as these are all objective pieces of information that can be used in the investigation and prosecution of the crime.
In what way do you think the location of the foramen magnum relates to the movement of each species
If the foramen magnum reveals how the spine sits in relation to the head, then it will be possible to determine whether the creature was moving on two legs or in another fashion.
The location of the aperture could thus reveal when our ancestors first adopted the upright, bipedal stance that is so frequently thought to be the distinguishing feature of humanity. The results show that in addition to humans, other typically bipedal species also have a foramen magnum at the base of the skull. The foramen magnum is more forward-shifted in kangaroos, kangaroo rats, and jerboas than in their quadrupedal (four-legged walking) close cousins.
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Please answer the question in the image.
Answer:
first option
Explanation:
Homeostasis is the method where the body maintains stability by monitoring and adjusting different parameters
The pGoG protein js known to block the G1 to S transition in the cell cycle. Explain why this prevents mitosis from happening in the cell
The hypophosphorylated Rb gene or its associated proteins, p107 and p130, control the development of differentiated mammalian cells from G1 to S phase by inhibiting the expression of genes necessary for S phase entrance by sequestering the E2F family of transcription factors.
What would occur if the G1 checkpoint failed to function?Cells contain a number of crucial checkpoint mechanisms in this phase that make sure the cell is in good enough shape to move on to the following phase of the cell cycle. Cells can advance through the G1 phase without hindrance when these pathways malfunction owing to genetic abnormalities, according to Steven Cappell, Ph. DNA in cells that are going through the preparatory activities during G1
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How is a phenotype determined in living organisms? Choose the BEST answer.
With a pedigree
Inherited genes from the parents.
Genetic combination of alleles
Through genetic counseling
Why might there be concerns about bias in BP’s reports about the recovery of the ecosystems damaged by the Deepwater Horizon incident?
A.
Few oil companies hire experienced, qualified marine scientists.
B.
It is not possible to assess the level of an ecosystem’s recovery.
C.
Most people will unquestionably accept the report findings as fact.
D.
BP will lose more money if further recovery efforts are needed.
It is nοt pοssible tο assess the level οf an ecοsystem’s recοvery there be cοncerns abοut bias in BP’s repοrts abοut the recοvery οf the ecοsystems damaged by the Deepwater Hοrizοn incident, sο οptiοn (b) is cοrrect.
What is ecοsystem?In οrder tο create a bubble οf life, different species οf plants, animals, and οther living things cοhabit in an ecοsystem. Abiοtic (οr nοnliving) and biοtic (οr alive) elements cοexist in ecοsystems.
What is carbοn diοxide?One part carbοn and twο parts οxygen make up the gas called carbοn diοxide. Its usage by plants tο create carbοhydrates during a prοcess knοwn as phοtοsynthesis makes it οne οf the mοst significant gases οn the planet.
Therefοre, it is nοt pοssible tο assess the level οf an ecοsystem’s recοvery there be cοncerns abοut bias in BP’s repοrts abοut the recοvery οf the ecοsystems damaged by the Deepwater Hοrizοn incident, (b).
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Sort each description by the type of RNA it describes.
There are three types of RNA, each with a distinct purpose.
RNA, also known as ribonucleic acid, is a nucleic acid that is vital for protein synthesis in living organisms. It also consists of a sugar-phosphate backbone with nucleotide bases attached.
In eukaryotic cells, three types of RNA exist, each with a distinct purpose. The three types of RNA types are:
messenger RNA (mRNA) transfer RNA (tRNA) ribosomal RNA (rRNA)mRNA (messenger RNA): carries genetic information from DNA to ribosomes in the cytoplasm, where it is translated into protein. tRNA (transfer RNA): transports amino acids to ribosomes during protein synthesis. rRNA (ribosomal RNA): aids in the construction of ribosomes, which are the sites of protein synthesis.
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The types of RNA are: messenger RNA (mRNA), ribosomal RNA (rRNA), and transfer RNA (tRNA).
mRNA: mRNA is the type of RNA that carries genetic information from DNA to the ribosome. This is used for the production of proteins.
rRNA: rRNA is the type of RNA that is found in ribosomes. Ribosomes are the structures within a cell that read the mRNA and build the proteins.
tRNA: tRNA is the type of RNA that carries amino acids to the ribosome. The ribosome reads the mRNA and builds the protein with the help of the tRNA.
In summary, mRNA carries genetic information from DNA to the ribosome, rRNA is found in the ribosome, and tRNA carries amino acids to the ribosome.
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Hi I need help with question 20
The DNA sequence GAC-TCA-AGA translates to the mRNA sequence CUG AGU UCU.
How are DNA sequence translated to mRNA sequence?DNA is transcribed into RNA in a process called transcription. During transcription, the DNA molecule unwinds and one of the strands is used as a template for RNA synthesis. The RNA polymerase enzyme adds complementary RNA nucleotides to the growing RNA strand, following the base pairing rules (A-U and G-C for RNA).
Once the RNA molecule is complete, it detaches from the DNA template strand and the DNA rewinds back into its double-stranded structure. The resulting RNA molecule is called messenger RNA (mRNA) and it carries the genetic information from the DNA to the ribosomes, where it will be translated into protein.
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PLease help me!!!! Hurry!!
We refer to these changes as mutations whenever the DNA sequence or the structure of the genes changes.
What is a mutation by substitution? mutation caused by insertion or deletion?Mutations known as substitution mutations occur when one base pair is changed for another. Insertion mutations are changes to the DNA sequence when one or more nucleotides are inserted.
Is a mutational effect more pronounced in a deletion or a substitution?Is a mutation's impact higher in a deletion or a substitution? Because the remaining portion of the strand is different, deletion has a higher impact than replacement, which can only change one amino acid. Point mutation: What is it? a change that takes place in one amino acid (substitution).
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What is true of carbon atoms?
a They are not found in living organisms.
b They have five valence electrons.
c They can form up to four covalent bonds.
d The do not bond with other elements.
The statement that is true about carbon atoms is as follows: They can form up to four covalent bonds (option C).
What are the characteristics of carbon?Carbon is chemical element (symbol C) with an atomic number of 6.
It can be found in pure form for example as graphite, a black, shiny and very soft material, or diamond, a colourless, transparent, crystalline solid and the hardest known material.
Carbon has four electrons in its valence (outer) shell, it can form four covalent bonds with other atoms or molecules. This allows carbon to share four electron pairs with other atoms.
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What does RNA stand for?
Answer:
RiboNucleic Acid
Explanation:
Answer: Ribonucleic Acid
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Umm I really need these questions answered. PLEASE
The biosphere is comprised of all ecosystems that exist on Earth. The biosphere encompasses everything from deep tree root systems to the gloomy conditions of ocean depths, lush rain forests, high mountaintops, and transition zones like this one, where ocean and terrestrial ecosystems collide.
What is biosphere made of?The biosphere is comprised of all ecosystems that exist on Earth. The biosphere encompasses everything from deep tree root systems to the gloomy conditions of ocean depths, lush rain forests, high mountaintops, and transition zones like this one, where ocean and terrestrial ecosystems collide.
The Great Gobi Biosphere Reserve is one of the world's biggest Biosphere Reserves. It depicts the Central Asian deserts and is located in the south-west of Mongolia, near the border with the People's Republic of China. The Great Gobi has a largely continental climate due to its isolation from the sea by the surrounding mountains.
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Rh positive blood (R) is dominant over Rh negative blood (r). When blood samples from 999 people were tested, 74. 4% were Rh positive, and 25. 6% were Rh negative. What percent of the people are expected to be RR,Rr, and rr?
Answer:
50 50
Explanation:
half and half is always 50 50
Plants make their food with the help of sunlight.
Which component of air do they use during this process?
Answer: carbon dioxide
the introductory passage describes work to develop increasingly synthetic cells. what are some reasons that researchers are so interested in developing synthetic life, as opposed to simply developing more approaches to work with existing species of organisms? you should speculate about realistic options, as these are not all listed in the chapter.
Researchers will be able to discover bare minimum of genes required for a cell to function thanks to synthetic cells. It is possible to modify synthetic cells such that they can be used for a range of manipulations.
An manufactured particle known as a synthetic cell imitates one or more biological cells' functions. Artificial cells are frequently made of biological or polymeric membranes that contain biologically active components. As a result, a variety of particles, including liposomes, polymersomes, nanoparticles, and microcapsules, might be considered artificial cells.
"Synthetic cell" refers specifically to biological cells, implying that these structures must be alive. "Artificial" implies that these structures were created artificially from the ground up, starting with their most fundamental elements. There is currently no artificial cell of this type.
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3. ¿Cuál es el valor de la constante efectiva de dos resortes idénticos conectados en serie que está utilizando un artista para una instalación de la próxima bienal, si la constante de cada uno de ellos es de 200 N/m y sobre los cuales cuelga un determinado peso?
Alguien me ayuda
The effective spring constant of the two identical springs connected in series is 100 N/m.
The effective spring is a constant of two identical springs connected in series, each with a spring constant of 200 N/m, that an artist is using for an installation at an upcoming art exhibition.
When springs are connected in series, their effective spring constant is less than the spring constant of each individual spring. The effective spring constant is given by the equation:
1/keff = 1/k1 + 1/k2 + ...
where keff is the effective spring constant, k1, and k2 are the spring constants of the individual springs, and the ellipsis represents any additional springs in the series.
In this case, since there are only two springs connected in series, the equation simplifies to:
1/keff = 1/200 + 1/200
1/keff = 2/200
1/keff = 1/100
Solving for keff, we get:
keff = 100 N/m
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Complete question:
What is the value of the effective constant of two identical springs connected in series that an artist is using for an installation of the next biennial, if the constant of each of them is 200 N/m and on which a certain weight hangs?
What i the producer in this food chain lettuce, greenfly, ladybird, thrush, or cat
The producer in the food chain is lettuce.
A food chain is a network of linear nodes in a food web that starts with producers and ends with an apex predator species, detritivores, or decomposer species. The relationship between creatures and the food they eat is also demonstrated through a food chain.
The trophic level represented by each link in a food chain is different. Autotrophs, or creatures that make their own nourishment, are producers. Examples of producers include plants and algae. They prepare their own food through the process of photosynthesis.
As they are consumed by other species and do not require food for energy, they are at the bottom of the food chain. And so, among the examples given in the food chain, lettuce is the only producer as it is an autotroph or a plant and consumed by other species.
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What is MOST likely the biggest environmental problem with burning an oil slick in the ocean to remove it? A. It creates air pollution. B. The process is too slow to help wildlife. C. It only removes the top layer of oil. D. The fire kills organisms living on the surface.
Answer: The biggest environmental problem with burning an oil slick in the ocean to remove it is that the fire kills organisms living on the surface of the water. Option D is the correct answer. Burning an oil slick can create a significant amount of smoke and air pollution, but the immediate impact on surface-dwelling organisms, such as birds and fish, is the most significant concern. Additionally, burning the oil only removes the top layer, leaving behind potentially toxic residues that can still be harmful to marine life. The process can also be slow and dependent on weather conditions, making it an ineffective solution for some situations.
your welcome.
Explanation:
You will analyze the effectiveness of a solution for reducing impacts of human activities on the environment. In this portfolio activity you will be writing the methodology section for a hypothetical experiment on the solution that you have chosen to research. A methodology section must be easily understood by others in order to analyze the experiment results. Answers to the following questions should be included in you methodology section:
what is the experiment testing for?
what is the most appropriate sample size?
what variable will be manipulated?
what variable will be measured based on the changes made to the IV ?
how ill you collect your data?
how will you know if your experiment is successful?
what safety precautions need to be taken?
As long as the number does not exceed 1000, 10% is typically a reasonable maximum sample size. The thing that reacts to the independent variable's change is the dependent variable.
What exactly is research methodology?The exact steps or methods used to find, pick, process, & analyze information on a subject are known as research methodology. The research methodology of a research paper provides readers with the opportunity to determine the high external validity and reproducibility of a study.
How does project methodology work?Those that work in a discipline employ a system of concepts, strategies, and processes known as a project management methodology. The top techniques differ not only in terms of structure, but also in other ways.
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Explain how the Moon orbits the Earth.
Answer:
the moon orbits the earth in a circle, which makes the moon seam to have different fases because of the sun.
the illusion of the ames room works because the illusion of the ames room works because conflicting occlusion cues make a depth determination ambiguous. size is computed from an incorrect estimate of distance. the conflict between texture gradient and convergence cues is incorrectly resolved. distance is inferred from an incorrect assumption about size.
Local conditions such as heavy rainfall or the removal of plants may limit the amount of nitrogen, phosphorus, or calcium available to a particular ecosystem, but the amount of carbon available to the system is seldom a problem. Why
Heavy rainfall or plant removal may limit the amount of nitrogen, phosphorus, or calcium available to a specific ecosystem, but the amount of carbon available to the system is rarely a problem because A Organisms do not require a lot of carbon. As you will see, carbon is the central element in compounds required for life. An organic substance is a compound that is found primarily in living organisms. Organic molecules are the building blocks of organisms' cells and other structures, as well as the carriers of living processes. Because carbon is the most abundant ingredient in organic molecules, it is critical to living on Earth.
Carbon exists naturally as carbon-12, which accounts for nearly 99% of all carbon in the world, and carbon-13, which accounts for about 1%.and carbon-14, which accounts for a negligible portion of total carbon but is crucial in dating biological things. Plants require more than just carbon dioxide to flourish (melting point: 6,422 degrees Fahrenheit/3,550 degrees Celsius). As previously stated, they require carbon dioxide, water, and sunshine to convert light into sustenance. Actually, any light, not just natural sunshine, will serve. But only to sustain their everyday photosynthesis. Plant physiology is more complicated than that.
A gene that affects fruit fly head size is a maternal effect gene. The gene exists as a dominant allele H and a recessive allele h. A female fly with a normal head is mated to a true breeding fly with a small head. All of the offspring have small heads.1. What is the genotype of the female fly?2. What is the genotype of all offspring?3. What is the genotype of the maternal grandmother?
1. The genotype of the female fly is Hh.
2. The genotype of all offspring is hh.
3. The genotype of the maternal grandmother is either HH or Hh.
1. The genotype of the female fly is Hh. This is because she has a normal head, meaning she must have at least one dominant allele H, but all of her offspring have small heads, meaning she must also carry the recessive allele h and passed it on to all of her offspring.
2. The genotype of all offspring is hh. This is because they all have small heads, meaning they must have inherited two recessive alleles h from their parents.
3. The genotype of the maternal grandmother cannot be determined with the information provided. This is because we do not know the genotype of the female fly's parents, so we cannot determine the genotype of the maternal grandmother.
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Which factor is a biotic factor of an ecosystem?
Responses
the amount of water vapor present in a rain forest
the bacteria that live in the intestine of a rabbit
the rocks that provide cover for a rattlesnake
the temperature of water in a stream
Answer:
the bacteria that live in the intestine of a rabbit
Explanation:
you might first think that it's the rocks that provide cover for a rattlesnake
bc a rattlesnake is a biotic factor but a rock is abiotic so it's abiotic to biotic while the bacteria that live in the intestine of a rabbit is biotic to biotic bc bacteria is a living component.