How do cells in an embryo become different types of cells?
Answers
Answer:
Different signals can cause embryonic cells to select specific parts of the DNA which can then be used to synthesize proteins, eventually building different cell types.
Related Questions
From what you have learned so far about DNA and RNA, what can you conclude about the role of RNA in the flowering of winter wheat? What questions do you still have?
Answers
Answer:
It synthesize proteins and carry genetic information from DNA.
Explanation:
The role of RNA in the flowering of winter wheat is the synthesis of proteins needed for flowering of plant and also carrying the messenger instructions from DNA in which genetic instructions are present that is required for the growth and development of reproductive stage of winter wheat such as flower. So RNA role is very important in the flowering of winter wheat.
RNA synthesize protein for flowering of winter wheat from using the genetic information on DNA.
DNA:
DNA is a permanent storage of information inside a cell. Every cell contains the same DNA as other cell. Muscle cells and Neuron both have same DNA sequence but they are different.
This in because of gene expression, DNA transcribe the information into RNA and information on RNA sequence is used tor protein production.
Therefore, RNA synthesize protein for flowering of winter wheat from using the genetic information on DNA.
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How do substances get into and out of the cell?
Answers
Answer:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
3. With regard to environmental management of waste
rock dumps, what is AMD, how is
it formed and how will you manage dump construction to minimize its
impact on the
environment? [6%]
Answers
AMD stands for Acid Mine Drainage. It is formed when sulfide minerals in rocks are exposed to air and water, resulting in the generation of sulfuric acid and dissolved metals. This acidic and metal-rich drainage can have detrimental effects on the environment, including water pollution and damage to aquatic ecosystems.
To manage dump construction and minimize the impact of AMD on the environment, several measures can be implemented:
Prevention: One of the primary approaches is to prevent or minimize the formation of AMD in the first place. This can be achieved by implementing proper waste management practices, including selecting suitable waste rock materials, limiting the exposure of sulfide minerals to air and water, and employing effective cover systems.
Neutralization: Implementing neutralization techniques can help mitigate the acidity of AMD. This involves treating the drainage with alkaline substances, such as lime or limestone, to raise the pH and reduce its harmful effects on the environment.
Containment: Constructing and maintaining effective containment systems is crucial to prevent AMD from infiltrating surrounding soils and water bodies. This can include using impermeable liners, such as clay or synthetic materials, to prevent the leaching of acidic drainage.
Water management: Proper water management is essential to control the movement and accumulation of AMD. This may involve implementing diversion channels, collection systems, and treatment facilities to contain and treat the acidic drainage before it enters the environment.
Monitoring and maintenance: Regular monitoring of water quality, pH levels, and metal concentrations is necessary to detect any potential AMD issues and take appropriate corrective measures. Ongoing maintenance and management of dump sites are crucial to ensure the effectiveness of preventive and mitigation measures.
AMD, or Acid Mine Drainage, refers to the acidic and metal-rich drainage that is formed when sulfide minerals, typically found in rocks associated with mining activities, come into contact with air and water. The exposure of sulfide minerals to oxygen and moisture leads to chemical reactions, resulting in the generation of sulfuric acid. This acid then dissolves metals present in the rocks, such as iron, zinc, and copper, which further contributes to the contamination of water bodies and soil.
The management of waste rock dumps is essential to minimize the impact of AMD on the environment. Dump construction should incorporate measures that aim to prevent the formation of AMD, neutralize its acidity, contain its spread, and manage water flow effectively. These strategies help to minimize the release of acid drainage and metals into the environment, protecting water quality and ecosystems.
The management of waste rock dumps is critical in mitigating the formation and impact of Acid Mine Drainage (AMD). By implementing preventive measures, neutralization techniques, containment systems, effective water management, and regular monitoring, the environmental impact of AMD can be minimized. Adhering to best practices and regulations ensures responsible waste management and helps safeguard water resources and ecosystems.
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In Fast Plants Green leaves are dominant, yellow are recessive:
Cross two heterozygous green leaf fast plants, and match the phenotype and genotype with the probable outcome.
This is just like Mendel's experiment crossing two Hybrid Tall pea plants and seeing the recessive short gene show up
Answers
Students may investigate the features Mendel tested and then cross two pea plants to observe what offspring they create in this area of the online lab.
Mendel's experiment:
"Plant five pea plants and see what they look like," Mendel advises pupils. The animated Mendel plants and waters five pea plants when students click the "Plant" button. Each pea plant shoots quite fast. The learner may view the pea pod's color, shape, and form, as well as the color and form of the mature seed, by moving the pointer over the plants.
Although the plants are selected at random each time the application is run, all of the numerous varieties of pea plants may be observed in these growing peas. Mendel quizzes the pupils on how many distinctive characteristics they notice in the plants after they have grown five plants
He shows there are seven distinct qualities :
Pea form (round or wrinkled)Pea green (green or yellow)Shaped like a pod (constricted or inflated)Pod hue (green or yellow)floral hue (purple or white)plant height (tall or dwarf)Arrangement of flowers (axial or terminal)They can cross any plant with itself or with another plant using the five plants they raised. The way that qualities are passed down to future generations may start to show certain patterns to students. They might know, for instance, that a plant with white flowers crossed with itself or another plant with white flowers will only produce plants with white flowers, whereas a plant with purple flowers crossed with itself or another plant with purple flowers will occasionally produce plants with white flowers. You could discover that by encouraging students to focus on specific characteristics during their experiments, they start to see these patterns on their own.
Hence, all about Mendel's experiment
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How was bacteria first discover?
Answers
Answer:
Bacteria were first observed by the Dutch microscopist Antonie van Leeuwenhoek in 1676, using a single-lens microscope of his own design. He then published his observations in a series of letters to the Royal Society of London. Bacteria were Leeuwenhoek's most remarkable microscopic discovery.
Explanation:
Type the correct answer in the box. Spell all words correctly.
What should Mohammed do after photographing a processed latent fingerprint?
Mohammed used an enhancement technique that made a fingerprint visible on a lamp. He photographed the print. Mohammed should now [____] the print from the surface to preserve it.
Answers
Answer:
Mohammed should now lift the print from the surface to preserve it
Explanation:
In order to preserve fingerprint evidence as required by crime laboratory policies and criminal justice systems, for which we have digital photography, casting material, and latent print lifts, that can be used as secondary evidence
The ridges on the cast and lift can be photographed to serve as an additional secondary evidence
The processing of the latent print after photographing is dependent on the surface type and may include the creation of an impression on soap, paint, wax, clay or dust
Therefore, Mohammed used an enhancement technique that made a fingerprint visible on a lamp. He photographed the print. Mohammed should now lift the print from the surface to preserve it
Answer:
Lift
Explanation:
The functions of bone include all of the following except:
A. structural support.
B. hematopoiesis.
C. mineral storage.
D. organ protection.
E. all of these are functions of bone.
Answers
The functions of bone include all of the following except all of these are functions of bone.
Bone, also known as osseous tissue, is really a hard, dense connective tissue which makes up the majority of the adult skeleton, the body's support structure. Cartilage, a semi-rigid type of connective tissue, provides the flexibility and fine surface for movement in areas of the skeleton in which bones meet (for example, this same ribcage and joints).
Ones body's skeletal system serves as a support structure. It shapes the body, allows movement, produces blood cells, protects organs, and stores minerals. The musculoskeletal system is another name for the skeletal system. Teeth are a component of the skeletal system as well. Because bones are strong, they can protect the body's delicate organs.
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the only source of water for marine iguanas is seawater with an osmolarity of 1000 mosm. marine iguana body fluids are normally 370 mosm. marine iguanas drink seawater, but their blood osmolarity does not increase. what osmotic challenges must they overcome?
Answers
The osmotic challenge the marine iguanas must overcome is: increased concentration of body fluids by salt gain.; option E is correct.
What is the osmolarity of a solution?The osmolarity of a solution is the number of dissolved particles of a solute per liter of solution. It is a way to express the concentration of solution.
The unit of osmolarity is osmol/L or mosm/L.
The higher the number of solute particles dissolved in a given volume of solvent in liters, the higher the osmolarity of the solvent will be.
Considering the given situation where the marine iguana drinks sea water which is of higher osmolarity than blood, the marine iguana has to find a way to ensure that the excess salt is removed. This is because, due to the higher osmolarity of the seawater compared to the marine Iguana's blood, water molecules would tend to move out from the cells in order to dilute the seawater taken in by the iguana. Hence, the risk of dehydration is high.
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Complete question:
The only source of water for marine iguanas is seawater with an osmolarity of 1000 mOsm Marine iguana body fluids are normally 370 mOsm Marine iguanas drink seawater; but their blood osmolarity does not increase: What osmotic challenges must they overcome?
A) Dilution of body fluids by water gain and salt gain.
B) Dilution of body fluids by water gain and salt loss:
C) Increased concentration of body fluids by salt gain and water gain:
D) Increased concentration of body fluids due to high uric acid production:
E) Increased concentration of body fluids by salt gain.
Hormones acting through signal transduction pathways stimulate a ______ response compared to hormones that produce genomic effects. a. faster b. equal c. slower.
Answers
Hormones acting through signal transduction pathways stimulate a faster response. Correct answer is option A
When compared to hormones that produce genomic effects. Signal transduction pathways trigger a response in a much shorter period of time than changes in gene expression, making them the preferred choice for fast-acting responses.
The response stimulated by hormones acting through signal transduction pathways is typically faster than hormones that produce genomic effects. Signal transduction pathways are short-range communications that involve proteins located in the cell membrane that act as receptors for hormones.
When a hormone binds to its receptor, a cascade of events occurs, which eventually triggers a response. This response is typically much faster than the genomic effects of hormones, which involve changes in gene expression and can take hours or days to manifest.
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How do the parts of a cell
enable it to survive?
Answers
nucleus of a eukaryotic cell directs the cell's activities and stores DNA.
Eukaryotes also have a golgi apparatus that packages and distributes
proteins. Mitochondria are the power house of the cell and provide the cell
with energy
Your skin is constantly producing new cells through cell division. How does this happen? During interphase, how does a cell prepare for division? Describe cell division, including the processes of mitosis and cytokinesis. Be sure to describe the mitotic steps.
Answer:
Answers
Answer:
Explanation:
Cell division is the process whereby a parent cell finish up into two daughter cells. they are two types of cell division
mitosismeiosismitosis is a process whereby a parent cell finish up and produces two daughter cells having the same number of chromosomes
stages of mitosis
Interphase: In this stage , nothing really happens in the cell, resting stage of the cellprophase: in this stage , the chromatins condenses into chromosomes, the nuclear membrane disappear and the spindle fibre radiates
metaphase: in this stage , the chromosomes align in the middle and meet at the equatoranaphase: the chromosomes split at the centromere and move to the opposite polestelophase: the cell splits, and the spindle fibre disappears cytokinesis: the cell produces two daughter cellsconsider the anatomical differences between bronchi and bronchiole airways. how does the cartilage, smooth muscle, epithelium, and diameter of the two airways differ?
Answers
The bronchi and bronchiole airways differ in their anatomical features such as cartilage, smooth muscle, epithelium, and diameter.
The bronchi are larger airways that contain cartilage rings that provide structural support to keep the airways open during breathing. The smooth muscle in the bronchi is less developed compared to bronchioles.
The epithelium of the bronchi is pseudostratified ciliated columnar that secretes mucus to trap particles and move them out of the airway. The bronchi have a larger diameter compared to bronchioles.
In contrast, bronchioles are smaller airways that lack cartilage rings and rely on the smooth muscle for support. The smooth muscle in bronchioles is highly developed and allows for constriction and dilation of the airways. The epithelium of bronchioles is simple ciliated columnar and secretes mucus to trap particles.
Bronchioles have a smaller diameter compared to bronchi, and the terminal bronchioles are the smallest airways in the lungs.
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if an animal does not consume glucose, how is the body still able to obtain the energy needed for cell process
Answers
spinal shock is a permanent loss of some of the spinal cord's functions. (True or False)
Answers
Spinal shock is a temporary loss of spinal cord functions that can occur immediately following a spinal cord injury. False
It is a period of decreased reflexes and muscle tone, and can last from hours to days or even weeks. Recovery from spinal shock can occur as the spinal cord adjusts to the injury.
"Spinal shock is a permanent loss of some of the spinal cord's functions (True or False)": The statement is False. Spinal shock is a temporary loss of spinal cord functions, not a permanent loss.
It usually occurs after a spinal cord injury and can last from several hours to a few weeks, depending on the severity of the injury. After the spinal shock phase, some functions may return gradually as the body recovers.
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Which title best reflects the main idea of the passage?
The Sun transfers energy in the form of heat to Earth through radiation. The ground gets warmer as heat flows from one ground particle (such as soil particles or rocks) to another. The ground heats up the air above it through conduction when the particles of air absorb heat from the particles of the ground. Heat also flows from the ground to the air through radiation. The warmed mass of air becomes less dense and rises. As it rises, it loses heat to the environment, so it cools and becomes more dense. The cool, dense air sinks and takes the place of the warm, less dense air. This convection process transfers heat from Earth’s surface to the atmosphere and moves heat around Earth.
Answers
Answer:
B: The Role of Heat Transfer Methods in the Distribution of Earth's Energy
Explanation:
Just took the question
Answer:
b
Explanation:
Which of the following objects have kinetic energy?
Choose 2 answers:
A. balloon rising slowly through the air
B. flower pot on a window sill 10 meters above the ground
C. a car moving on the freeway at 100 kilometers per hour
D. a motorcycle sitting still, parked in a garage
Answers
Answer:
A. balloon rising slowly through the air.
C. a car moving on the freeway at 100 kilometers per hour.
Describe one source of genetic variation in meiosis and explain, in your own words, how it increases genetic variation.
Answers
One source of genetic variation in meiosis is Recombination or crossing over.
A zygote is formed when one gamete from each parent combines fertilization. In meiosis, each gamete has a unique set of DNA because of recombination and independent selection. The resulting zygote is a one-of-a-kind creation as a result of recombination.
In prophase I, homologous chromosomes, one from each parent, pair along their lengths, gene by gene, resulting in recombination or crossing over. Chromosomes break and then rejoin, exchanging some of their genes. The combination of genes on the chromosomes is now novel.
During meiosis, the process of chromosomes moving at random to separate poles is called an independent assortment. After meiosis, a gamete will have 23 chromosomes, but independent assortment means that each gamete will have one of many different chromosome combinations.
This rearranging of genes into one-of-a-kind combinations raises a population's genetic variation and explains the variation between siblings with the same parents.
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What are the inputs and outputs of photosynthesis?
Pls, help ASAP!
Answers
which of these factors is associated with sustainable faming
A. monoculture
B. food security
C. desertification
D. intensive farming
Answers
Answer:
B. food security
Explanation:
Answer:
B-Food Security
Explanation:
help I will mark brainliest
Answers
Answer:
A. Clumped, uniform, random
How does global warming affect the oceans?
Answers
Answer:
The ocean absorbs most of the excess heat from greenhouse gas emissions, leading to rising ocean temperatures. Increasing ocean temperatures affect marine species and ecosystems. Rising temperatures cause coral bleaching and the loss of breeding grounds for marine fishes and mammals.
Explanation:
Explanation:
please remember to write it in your own words
List 2 examples of how subduction and uplift CAN move or transform rocks.
Answers
Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries.
Uplift or sinking can be due to tectonic movements of plate or the gravitational adjustment of the Earth's crust.
For example cascadia subduction zone and southern alaska are the sites of ongoing subduction in which pacific and juan de fuca plates slide beneath the north american plate. This is the major movement of rocks that can transform the region . This movement will lead to formation of Aleutian island .
In general uplift means vertical elevation of the Earth's surface in response to natural causes. Example of uplift may include tectonic plate that collide, and push up plate and land, forming mountains.
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Create a question that starts with a command word from the syllabus. Your question needs to be based on the topic of ENERGY SECURITY OR ENERGY INSECURITY.
*Create a POINT VALUE and a MARK SCHEME for the question
*Example of command words: Describe, Explain, Compare, State, Outline, Discuss, Suggest
Answers
Energy security presents a number of difficulties for developing nations. Lack of infrastructure and scarce financial means are two of the major problems.
What are the biggest energy-related problems the globe is currently facing?The majority of energy production still results in greenhouse gas emissions, and hundreds of millions of people do not have any access to electricity at all.
What problems arise from energy insecurity?Chronic energy insecurity is a problem that persists over time and can be brought on by a persistent inability to access or pay sufficient energy to meet household requirements. Living in a house that is always cold because the expense of heating it is an example of chronic energy insecurity.
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Question:
Discussion of at least two challenges facing developing countries in achieving energy security, such as lack of infrastructure, limited financial resources, dependence on fossil fuels, and political instability (4 points)
Homeostasis can be disrupted by many factors. External stimuli that can disrupt homeostasis include ______ & outside temperature. Internal stimuli include ______
& water concentration.
A) pathogens, blood pressure
B) blood pressure, pathogens
C) insulin production in body, toxins
D) toxins, insulin production in body
Answers
Answer:
Pathogens and blood pressure
Pathogens and blood pressure
What is Homeostasis?
Homeostasis is a mechanism that maintains a stable internal environment despite the changes present in the external environment. The body maintains homeostasis by controlling a host of variables ranging from body temperature, blood pH, blood glucose levels to fluid balance, sodium, potassium and calcium ion concentrations.
What is an external change in homeostasis?
Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis (“steady state”). These changes might be in the level of glucose or calcium in blood or in external temperatures. Homeostasis means to maintain dynamic equilibrium in the body.
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What organelle is the arrow pointing to
Answers
Answer:
where is the photo, arrow?
Bones provide attachments that allow skeletal muscles to cause movements? True or false
Answers
Answer:
True ...........................
An atom that has gained or lost an electron ___________. (a). enzyme (b). ion (c). isotope (d). molecule
Answers
Answer:
Ion
Explanation:
An isotope occurs when their is an uneven number of protons and electrons
What would most likely happen if there were no condensation stage in the water cycle?
Water could not convert from a gas to a liquid.
Water could not convert from a liquid to a gas.
Water could not convert from transpiration to evaporation.
Water could not convert from precipitation to evaporation.
Answers
Answer:
Water could not convert from precipitation to evaporation I think
Explanation:
If there were no condensation stage in the water cycle, then water could not convert from a gas to a liquid. The correct option is A.
What is Condensation stage?Condensation is the process by which water vapor changes to its liquid form. When the temperature of air decreases, the water vapor in it comes together to form liquid droplets or ice crystals. This process is called condensation.
Without condensation, the water vapor in the atmosphere would not form clouds, and the water cycle would be incomplete. So, if there were no condensation stage in the water cycle, water could not convert from a gas to a liquid.
If there were no condensation stage in the water cycle, water could not convert from a gas to a liquid. The condensation stage is an essential part of the water cycle. During this stage, water vapor in the atmosphere condenses and forms water droplets that eventually lead to the formation of clouds.
Therefore, the correct option is A.
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Select the correct answer from the drop-down menu. What are the two specific concerns of species diversity? Species diversity is concerned with both A, species survival
B, species richness
C, species growth rate
D, species demographic and A, evenness of species abundance
B, species survival
C, species growth rate
D, species gender
Answers
Answer:
The answer above was wrong. Maybe it wanted it put in a different way but don’t do what i did
Explanation:
Plato
The two specific concerns of species diversity are species survival and evenness of species abundance. The correct options are A and B.
What is species diversity?"Species diversity is defined as the number of different species present in an ecosystem and their relative abundance." When all of the species present are equally abundant in the area, diversity is greatest.
Species diversity is a measure of the number of different species found in a given ecosystem or habitat.
It is critical to be concerned about species survival because the extinction of a species can have a negative impact on the entire ecosystem.
Furthermore, the evenness of species abundance is important to consider because the dominance of one or a few species can have a negative impact on the diversity and stability of an ecosystem.
Thus, the correct options are A and B.
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Which of the following is not considered a chemical property?
A) Reactivity
B) Flammbiity
C) Solubility
D) Oxodation
Answers
Solubility is a physical property, not a chemical property. Correct option is C.
Chemical properties are characteristics of a substance that describe how it can undergo chemical reactions or change into different substances. Reactivity, flammability, and oxidation are all chemical properties because they describe how a substance can interact with other substances or undergo chemical changes.
On the other hand, solubility is a physical property because it describes how a substance can dissolve in a particular solvent without changing its chemical composition.
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