Due to their affinity for mRNA, siRNA block gene expression by attaching to the result of transcription.
SiRNA molecules silence genes in what ways?Gene expression leads to cell differentiation. There are various techniques to control genes. Small interference RNA molecules (sirna), for instance, stop gene expression by attaching to the transcriptional product.
What does differential gene expression look like?Only red blood cells produce hemoglobin, and this is because these genes were activated throughout the process of differential gene expression, identifying this kind of cell. Only red blood cells have activated hemoglobin-producing genes; brain and muscle cells do not.
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Name three different foodstuffs or drinks that are used by your family and explain how biotechnology is involved in producing them.
The family consumes a variety of foods and beverages, including soybeans, corn, and cotton. In biotechnology, microorganisms are employed to preserve food and create a wide range of goods with added value.
Describe biotechnology:Biotechnology is a branch of engineering that uses biological systems, living things, or parts of them to create or develop a variety of products. Making bread and using yeast, a living organism, to make the desired result are examples of biotechnology processes.
Soybeans, corn, cotton, canola, papaya, tomatoes, and squash are examples of biotechnology crops. The yeast used to make bread and an enzyme required in the creation of cheese are both produced via biotechnology.
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What blood type if parents are AB and O?
If the blood type of parents are AB and O, the blood type of the offspring can be either A or B.
The blood type in humans is determined by the ABO gene. There three types of ABO gene, which are, A, B and O. The O gene is recessive to A and B. An individual can have one of the four blood types namely, A blood type (AA or AO), B blood type (BB or BO), AB blood type (AB) and the O blood type (OO).
If the parents have AB and O blood type, their genotypes must be AB and OO respectively. When we cross these genotypes, we obtain two possible genotypes in the offspring which are AO (A blood type) and BO (B blood type). Therefore, an offspring born to parents with AB and O blood type can only be either a A blood type or B blood type.
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Which structure allows the growing mushroom to nourish itself?
The mycelium spread out through the soil or other substrate. The hyphae absorb nutrients from the surrounding environment, which the mushroom then uses to grow and reproduce.
The vegetative part of a fungus or fungal-like bacterial colony is made up of mycelium, which is a mass of branching, thread-like hyphae.
The mycelium is an important part of the mushroom's life cycle. It is responsible for finding food and water, and it also produces the spores that allow the mushroom to reproduce.
The mycelium is also a source of enzymes that break down organic matter, which helps to recycle nutrients in the environment.
The mycelium is a complex and fascinating structure that plays an important role in the life of the mushroom and the environment.
Therefore, mycelium is the structure that allows the growing mushroom to nourish itself.
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Earth is approximately 4. 5 billion years old. Is it likely that any of the rocks that were on earth's surface when it first formed are still in existence?.
A is the anwer, No rock material is constantly recycled on Earth's surface through the rock cycle.
which made it possible for researchers to calculate that Earth was at least 4.3 billion years old?Earth's age is generally acknowledged by astronomers and geologists to be 4.6 billion years. With the help of dating techniques like rubidium-strontium and uranium-lead, this age has been determined through the isotopic analysis of several meteorites as well as soil and rock samples from the Moon.
Which stage of the rock cycle is active at the Earth's surface?Rocks at the surface of the Earth are reduced in size by weathering. Sediments are the microscopic pieces. These sediments are moved around by erosion in different locations by running water, ice, and gravity. Sedimentation is the process by which sediments are deposited or laid down.
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Which of the following is a way families can build a support system?
It is important to surround ourselves with family and friends for support and comfort in both times of joy and distress.
Why family is a great support system?When you have a healthy family support system, you are nearby family members or friends that you have a positive connection with, who hearten you in your choices and trials, and are there through the good and bad experiences of life – they don't leave when it gets tough.
Appreciation and affection- pizing and affection are about being kind to each other as family members. Sharing positive inner feelings with each other and living nice to each other is just a couple of ways families show appreciation and affection.
So we can conclude that Building and continuing a familial support system is important to your family's health.
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A phospholipid is composed of all the following, except _____.
A. A charged phosphate group
B. A glycerol head
C. A fatty acid tails
D. A polysaccharide nucleus
E. Carbon, hydrogen, oxygen, & phosphorus
How does the phosphorus cycle work step by step?
The steps of the phosphorus cycle function are:
Phosphorus enters an ecosystem through weathering of rocks and soil, and is taken up by plants through their roots.Animals consume the plants, and phosphorus is passed through the food chain. Animals excrete phosphorus-containing waste, which is absorbed back into the soil.Decomposers break down the phosphorus-containing waste, releasing phosphorus back into the soil.The phosphorus is taken up by plants and the cycle begins again.The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the environment. Phosphorus is an essential nutrient for all forms of life, and it cycles between organisms and the environment.
In the environment, phosphorus cycles between the land, water, and air. It is found in rocks and soil, and it is taken up by plants and animals. Animals excrete phosphorus, which is broken down by bacteria and fungi, returning it to the environment. Phosphorus is also released through volcanic activity and some industrial processes.
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READING TOOL Connect to Visuals Before you read, preview Figure 12-7. Try to infer the read, revise purpose of this diagram. As you read, compare your inference to the text. After you your statement if needed or write a new one about the diagram's purpose. Take notes on the lines provided. Then view the Punnett square and answer the questions below regarding the genotypes and phenotypes.
The triallelic gene codes for the ABO blood type and its alleles express complete dominance and codominance.
What is the ABO blood type?Blood type ABO is determined by a triallelic gene I. Depending on the allelic interaction, this gene can express complete dominance or co-dominance.
IA and IB express complete dominance over i, meaning that the dominant IA and IB alelles hide the expression of the recessive allele i in heterozygous individuals.
Cross:
Parentals) IAIB x ii
Gametes) IA IB i i
Punnett square) IA IB
i IAi IBi
i IAi IBi
Therefore, The triallelic gene codes for the ABO blood type and its alleles express complete dominance and codominance.
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how does the flow of water on earth affect the phosphorus cycle
Answer:
rain and weathering cause rocks to release phosphate ions and other minerals.
Explanation:
compare artificial selection to natural selection
discuss the factors Darwin considered in forming his theory of natural selection
construct an explanation based on evidence for how the four principles impact the process of natural selection
evaluate evidence supporting claims that environmental changes influence species over time
The factors Darwin considered in forming his theory of natural selection are, Given the scarcity of resources in nature, animals with heritable features that promote survival and reproduction will typically produce more offspring than their contemporaries, resulting an increase in the frequency of like traits across successive generations.
What is theory of natural selection ?Natural selection is termed as the variation in individual survival and procreation brought on by phenotypic variances.The evolution of a population's heritable features across generations is a fundamental mechanism of evolution.theory of natural selection was propounded by Darwin.Comparison of artificial selection to natural selection:Natural selection is basically any form of selection Which arises as a result of an organism's capacity for environmental adaptation. While , artificial selection is selective breeding that is enforced by an outside force, typically humans, in order to increase the frequency of desirable traits.
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For a certain breed of cat, short tails are dominant (7) and long tails are
recessive (t). The Punnett square below shows a cross between two parents.
What is the phenotype ratio for this cross?
B
2 long 2 short
if the cats have 4 kittens the short tails are dominant, so there will be 2 long tails and 2 short tails.
How many molecules of carbon dioxide are released in Krebs cycle per glucose molecule?
A. 2
B. 3
C. 4
D. 6
The correct choice is C 4
The Krebs cycle, also known as the TCA (tricarboxylic acid) or citric acid cycle, occurs within the mitochondrial matrix. This cycle is the stepwise oxidative and cyclical breakdown of acetyl-CoA. This cycle acts on two pyruvate molecules produced during glycolysis.
The end product of glycolysis is pyruvate. Two molecules of pyruvate are produced from one molecule of glucose. Therefore, one molecule of pyruvate is responsible for the release of 2.
CO
2
1 Molecules in the Krebs cycle. Because one molecule of glucose yields two molecules of pyruvate.There are two cycles to use both molecules of pyruvate. Therefore, one glucose molecule is involved in the release of 4.
CO
2
Molecules in the Krebs cycle.
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Can genes that are linked exhibit independent assortment?
A - No, alleles of linked genes undergo crossing over to maintain certain allele combinations.
B - Yes, but only if recombination occurs during gamete formation.
C - No, alleles of linked genes are always inherited separately of one another.
D - Yes, but only if homologous chromosomes segregate during meiosis.
Answer: When genes are close together on a chromosome, the alleles on the same chromosome tend to be inherited as a unit more frequently than not. Such genes do not display independent assortment and are said to be linked.
Explanation:
The process of cell respiration ultimately produces a net gain of 36 molecules of ATP from a single molecule of glucose.
What molecules are output from the aerobic stage of cellular respiration? What else is produced as a result of this process?
The molecules that are output from the aerobic stage of cellular respiration are: molecules; carbondioxide and water, other outputs; energy.
What is cellular respiration?Cellular respiration is the process by which cells obtain chemical energy by the consumption of oxygen and the release of carbon dioxide.
It is a metabolic pathway that breaks down glucose and produces ATP (energy). Aerobic respiration involves the use of oxygen to break down glucose into carbondioxide and water molecules.
Therefore, it can be said that carbondioxide and water are the output molecules while energy is another substance produced as a result of the process.
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a 6.50g piece of substance B was rolled out into a thin sheet measuring 24.0 cm x 18.0 cm. calculate the volume and the density of the sheet of metal. show work use units
The volume and the density of the sheet of metal can not be calculated because the value for thickness is unknown.
Calculating the volume of the sheet of metal:m = 6.50g
w = 24.0 cm
L = 18.0 cm
We need to determine its thickness. Since we don't know the thickness, we can calculate it by using the density formula:
Density = Mass / Volume
ρ = m/v
making Volume, V the formula :
Volume = Mass / Density
We know the mass of the substance (6.50g) and we can assume that the density is constant throughout the sheet.
We can assume that the density of the sheet of metal is the same as the density of substance B.
So, the volume of the sheet of metal is:
Volume = 6.50g
Density
= (6.50g)
(Density of substance B)
We can calculate the area of the sheet by using the formula:
Area = length x width
Area = 24.0cm x 18.0cm
Area = 432cm²
And the thickness of the sheet is:
Volume = (6.50g)* 432cm²
Area (Density of substance B)
Now we can calculate the density of the sheet by using the formula:
Density = Mass
Volume
Density = 6.50g
(432cm² x thickness)
Hence, the density of the sheet of metal is:
Density = 6.50g
(432cm² x thickness) g/cm³
Note: We have an unknown value for thickness so we can't calculate the density of the sheet of metal.
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Answer: A
Explanation:
The process described above is metabolism.
Which of the following occurs during the light-dependent reactions of plants?a. Electron transportb. The splitting of waterc. A hydrogen ion gradient is established to produce ATd. All the above
All of the given options occur during the light-dependent reactions of plants: (a) Electron transport; (b) The splitting of water; and (c) A hydrogen ion gradient is established to produce ATP.
Light-dependent reactions are the part of photosynthesis process where the plant captures the sunlight energy which is inorganic form in order to convert it into usable form of energy like the ATP and NADPH. These reactions occur in the chloroplast.
ATP stands for Adenosine Triphosphate. It is the most usable form of energy by various living organisms. ATP is required to perform all the active processes of the living body. The splitting of ATP releases high amounts of energy which is then used for body functions.
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What is the difference between vascular and nonvascular plants?
O presence of leaves
O have systems for transporting water and minerals
o need water in order to grow
The difference between ascular and nonvascular plants have systems for transporting water and minerals.
What is meant by minerals?
In terms of geology and mineralogy, a mineral or mineral species is, generally speaking, a pure, naturally occurring solid chemical compound with a fairly well-defined chemical makeup.Compounds found only in living creatures are typically not considered minerals according to geological definitions. However, some minerals, like calcite, are frequently biogenic or, in terms of chemistry, are organic molecules (such as mellite).Rock, which is defined as any bulk solid geologic substance that is sufficiently massive and sufficiently homogeneous, is not a mineral.A rock can be made up of a single type of mineral or it can be an amalgam of two or more different mineral types that have been spatially separated into different phases.To learn more about minerals refer to
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Which of the following describes advantages of geothermal power?
1. Plants require some electricity to operate.
II. Its use reduces greenhouse gases.
III. It uses local sources of energy.
Its use reduces greenhouse gases.
The advantage of geothermal power is its use reduces greenhouse gases.
What are the two benefits of geothermal energy in terms of power plant operating costs?For heating and cooling, effectiveness and lower carbon emissions. Geothermal energy provides low-carbon and energy-efficient heating and cooling choices for American homes and businesses, including geothermal heat pumps that manage heat from buildings by utilizing the Earth's constant temperature.
Are greenhouse gases produced by geothermal energy?Geothermal energy, in contrast to fossil fuels, is a sustainable resource that doesn't release the greenhouse gases that contribute to climate change. Additionally, since the "fuel" is free once a geothermal system is installed, the marginal expenses are relatively modest.
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Ideally, a motorist should try to enter an expressway lane ____________
answer choices
- on the exit ramp
- at a slower speed than the traffic already on the expressway
- at the same speed as the motorists on the expressway
- any speed they want
Ideally, a motorist should try to enter an expressway lane at the same speed as traffic already on the expressway.
Thus, the correct answer is C.
What is an expressway lane?Expresswаys аre designed so thаt is entering аnd exiting hаs sepаrаte lаnes for fаster moving trаffic. The proper wаy to enter аn expresswаy from the entrаnce rаmp is thаt:
The first thing to do аs you enter the expresswаy is to communicаte your intention with the turn signаl.When entering аn expresswаy, in the аccelerаtion lаne а driver should аccelerаte the speed of the vehicle to sаfely merge onto the expresswаy trаffic.You аre entering аn expresswаy, аnd аre in the аccelerаtion lаne. You should speed up to the flow of trаffic on the expresswаy by using the length of the аccelerаtion lаne.When entering аn expresswаy, your cаr’s speed should mаtch the speed of trаffic on the expresswаy.When entering аn expresswаy from the аccelerаtion you should yield the right-of-wаy to the vehicles аlreаdy present on the expresswаy.For more information about an expressway lane refer to the link:
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Which of the choices is a characteristic of meiotic cell division?
Chromosome count is reduced by half during meiotic cell division.
Which of the following describes how meiotic cell division works?Meiosis is a type of cell division that results in the formation of four gamete cells and a halving of the parent cell's chromosome count. In order to reproduce sexually, egg and sperm cells must be produced.
What divisions are there in meiosis?There are two cellular divisions involved in the meiotic process: To reduce the number of chromosomes by half (diploid to haploid), the initial meiotic division separates pairs of homologous chromosomes. In the second meiotic division, sister chromatids are split apart.
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An organic synthesis to make the pain reliever acetominophen is supposed to produce 280 kg of product but instead produces 70 kg of waste in addition to the acetaminophen. What is the percent yield?.
When making acetaminophen which yields 280 kg of product but produces 70 kg of waste other than acetaminophen, the percent yield is 75%.
Here we know that the theoretical weight is the weight of the acetaminophen that should be produced if the reaction occurs efficiently, while the experimental weight is the weight of the acetaminophen obtained in the synthesis.
Percent yield = (trial product weight ÷ product theoretical weight) × 100
The theoretical weight of acetaminophen is = 280kg
The experimental weight of the product obtained in the synthesis is = 280 kg of product -70 kg of waste = 210 kg of acetaminophen
Percent yield = (210 ÷ 280) ×100
Percent yield = 75%
So, the percent yield from making acetaminophen i.e., 75%.
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Following the abc' of behavior model our blank caue our reaction to tre not the event
BC represents predecessor (A), conduct (B), and outcome (C). It is a perception instrument that instructors can use to investigate what occurred previously, during, and after a behaviour1. All conduct can be considered correspondence.
Initiating Occasion (something happens to or around somebody) B: Conviction (the occasion makes somebody have a conviction, either levelheaded or unreasonable) C: Outcome (the conviction prompts a result, with reasonable convictions prompting solid outcomes and nonsensical convictions prompting undesirable outcomes).
The ABC model is explicitly intended to put a focus on your negative contemplations by carrying them to the outer layer of your levelheaded psyche. When you distinguish a specific idea that prompts self-rout, the subsequent stage is to supplant it with a more levelheaded, positive other option.
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initiates DNA synthesis by making short RNA segments at the replication fork, what results?
Initiates DNA synthesis by making short RNA segments at the replication fork, resulting in two branches each consisting of a single strand of DNA.
The replication fork or replication fork is the structure formed when DNA replicates. Replication This fork forms the effect of the enzyme helicase which breaks the hydrogen bonds that identify the two DNA strands, causing them to unfold the double strand into two branches, each consisting of a single DNA strand.
Each of these branches becomes a "mold" for the formation of two new DNA strands based on their complementary nucleotide sequence. DNA polymerase forms a new DNA strand by extending the oligonucleotides that are formed by the primase enzyme and are called primers.
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What is the phosphorus cycle and why is it important?
Answer:
phosphorus cycle is important because
Explanation:
The phosphorus cycle matters because phosphorus is an essential nutrient for sustaining life on Earth, where it plays a central role in the transfer of energy within organisms, the structure of the genetic material, and in the composition of cell membranes, bones and teeth.
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Compare and contrast the Paleozoic and
Mesozoic Eras in terms of the length of each
era, landmasses, and the life forms that evolved in
each. What is interesting or suprising to you in
each era?
It must have a significant proportion of plant life that is endemic, or seen anywhere else on the earth, and at least 1,500 leguminous plants.30percent or less of the original vegetation must remain.
Endemics are what in biology?
In biology, the term "endemism" refers to the geographic distribution of a clade that is only present naturally in a narrow geographic area. As a result, species are those only exist in a particular region, such as a mountainous region, lake, or island, among other examples.
What are some instances of endemic species?
species of plants and animals that can only be found in a certain geographic area are known as endemic species.
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As infants gain familiarity with repeated exposure to a visual stimulus, their interest wanes and they look away sooner. The decrease in an infant’s responsiveness is called a. concentration. b. teratogens. c. habituation. d. stability. e. transference.
As babies get used to repeating exposure to visual stimuli, their interest will decrease and they will look away more quickly. The decreased responsiveness of the baby is called c. habituation.
What is visual ability?Spatial visualization ability or visual-spatial ability is the ability to mentally manipulate two-dimensional and three-dimensional images. Usually measured by a simple cognitive test and predicted by the user's ability with several face-to-face approaches. The first thousand days of a child (from the womb to the age of 2 years) is the right time to stimulate his intelligence.
When the baby is used to repeated visual exposure, the baby will turn away because his interest has decreased, this is due to visual process habituation.
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1. Why did National Geographic choose Queens, New York to do their DNA sampling experiment?
2. What can DNA from cheek swabs tell people about their ancestors?
1. Due of its high genetic diversity, National Geographic decided to conduct their DNA sampling experiment in Queens, New York.
2. You can locate distant ancestors based on common DNA with just a simple cheek swab, no spit or blood required.
You can also get a percentage breakdown of your ethnic origins. Additionally, it is possible to confirm any known family ties. Analyzing DNA variants can reveal information about a person's ancestry and the connections between their family.
DNA is used as a molecular tool to determine our ancestry because each of our parents gives us one-half of our chromosomes. Small segments of DNA are sequenced during genetic testing rather than the entire genome of an individual.
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what gas is required in order for photosynthesis to occur?
CO₂ or the carbon dioxide is the gas which is required in order for the process of photosynthesis to occur.
Photosynthesis is basically a process by which a plant produces its own food. The requirements for photosynthesis are sunlight, water and the carbon dioxide gas.
This process leads to the formation of glucose which is stored in the plant itself in the form of starch. Carbon dioxide (CO₂) is the gas which the plant intakes during photosynthesis and the gas which is emitted out by the plant as a product of photosynthesis is oxygen (O₂). Oxygen is required by animals for the purpose of respiration.
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2. Which of the following is an external stimulus to which
organisms respond?
A. gravity
B. light
C. temperature
D.All of the above.
3. Diabetes can result when the body does not produce enough:
A. Adrenaline
B. bile
C. Insulin
D. nitrogen
Answer:
D and c
Explanation:
For the first, when in doubt pick all of the above
For the second, people with diabetes have to take insulin shots so they don't produce enough insulin