During the 1973 eruptions on the island of heimaey, residents used blank Pyroclastic materials to build barriers that diverted lava flows away from their economically important fishing port.
What are Pyroclastic materials?
Pyroclastic materials is another known name for vapor, lava fragments and clouds of ash carried through the air. Movement of pyroclastic materials through the air is always rapidly and hot because vapor provides its buoyancy. Due to its general make-up and the rapid/hot movement, these materials are capable for destroying life and property within their paths and can extend miles away from the volcano.
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Fill in the blanks
Describe and explain why a root hair cell is diffrent to a cell found in a leaf.
A root hair cell has a.................
Theese features maximise................. Into the root from the soil.........
The leaf cell has.................. Because of theese are the parts of the cell that.............
Answer:
Here is answer
Explanation:
A root hair cell has a large surface area.
These features maximise absorption of water into the root from the soil.
The leaf cell has chloroplast because of these features the parts of cell can photosynthesis.
Answer:
I think we it has a hair I don't know
What do you think is the same characteristic/attitude of a person and your chosen pets?
Chosen pet: Bird
Answer:
Eagle: Loves authority & power.
Peacock: Is the crowd-pleaser.
Owl: The 'numbers' guy (or girl)
Dove: The nurturer & helper.
Explanation:
hope it help
have a nice day
3. The pH of stomach acid is 2, why is this both good, but possibly destructive to our bodies?
what are menisci (articular discs)? what are menisci (articular discs)? cavities lined with cartilage wedges of fibrocartilage that partially or completely divide the synovial cavity tendon sheaths small sacs containing synovial fluid
Menisci (articular discs) are the: (1) cavities lined with cartilage wedges of fibrocartilage that partially or completely divide the synovial cavity.
Cartilage is the connective tissue. It acts as a shock absorber therefore protects the bones and muscles. It is a very strong yet soft and flexible tissue. The cells that make up the cartilage are called chondrocytes. There are three types of cartilage. These are: hyaline, fibro and elastic.
Synovial cavity is the space between two bones. It is filled with a fluid called synovial fluid. Almost all the joints contain synovial cavity. The function of the cavity and fluid is to lubricate the ends of the bone and therefore protect them any wear or tear.
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What percentage of offspring will carry the dominant trait?
25%
75%
100%
50%
0%
Answer:
100%
Explanation:
If you take a look at the Punnett Square, all offsprings carry the dominant trait (denoted by the capital A). Since all squares carry the dominant trait, there is a 100% carry of the dominant trait in the offsprings.
[tex]\left[\begin{array}{ccc}&A&a\\A&AA&Aa\\A&AA&Aa\end{array}\right][/tex]
~
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When some bacteria use lactose as a source of energy, they produce propionic acid and carbon dioxide. What is the name for this process?.
Fermentation is the process when some bacteria use lactose as a source of energy, they produce propionic acid and carbon dioxide.
What is fermentation?
Wine, beer, yogurt, and other goods are made through the process of fermentation. The chemical process that takes place during fermentation is seen below. A carbohydrate, such as starch or sugar, is transformed into an alcohol or an acid during the metabolic process of fermentation.
How is cellular respiration triggered by fermentation?Glycolysis is the starting point of any type of cellular respiration, and the final byproduct is pyruvic acid, a 3-C molecule. Fermentation is one of two main methods by which various cells deal with this pyruvate. Let's take a close look at anaerobic respiration, kinds of fermentation, and so forth.
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Can a flower be both perfect and incomplete?
Answer:
It is possible for a perfect flower to be incomplete, but it is not possible for an imperfect flower to be complete.
Explanation:
A flower with male and female parts is called a perfect flower. A flower that is missing male or female parts is an imperfect flower. Plants may have flowers that are complete or incomplete.
State two (2) human activities that alter the water cycle and explain HOW they affect this cycle.
By building dams to store water and by taking water for domestic, commercial, and agricultural uses, humans actively alter the dynamics of the water cycle.
What human activities affecting water cycle?There is a lot of evidence to suggest that human activity is the cause of local and global water cycle disturbances and alterations.
The damming of rivers for hydroelectricity, the use of water for farming, the clearing of forests, and the burning of fossil fuels are just a few human activities that can have an impact on the water cycle.
Therefore, human activities that alter the water cycle.
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vernalization you are studying a winter-annual arabidopsis plants. you identify a strain with a mutation in the flc gene that renders it inactive. when do you expect this plant to flower?
The plant will never be able to flower.
What are annual Arabidopsis plants?
A plant is said to be annual if it completes all stages of its life cycle, from germination to the production of seeds, during a single growing season and then perishes when that season is over.
During the process of flower growth, from the vegetative to the reproductive phase, a number of genes, including SOC1, LFY, FLC, and others, play highly important roles. Which FLC gene is the repressor gene of SOC1 that result in the flowering of the plant, but after the cold treatment an additional gene called COLDAIR RNA in the process of vernalization represses FLC and causes flowering to occur. However, if COLDAIR RNA is unstable, it would be nonfunctional and the plant would never be able to flower because of this.
Hence, the plant will never be able to flower.
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How can you tell by looking at the magnetic field lines where
the field is the strongest?
Answer:
The density of field lines indicates the strength of the field.
Explanation:
The seafloor has some valuable minerals. Manganese nodules containing manganese, iron, copper, nickel, phosphate, and cobalt may be as small as a pea or as large as a basketball. Estimates are that there may be as much as 500 billion tons of nodules on the seafloor. The minerals in manganese nodules have many uses in the industrial world, but currently they are not being mined.
Why do you think these seafloor resources are not being mined? (Please write a complete sentence or two)
giving 50 points!
The ocean floor is home to a very large number of aquatic life which would be destroyed when we mine manganese nodules from the ocean floor.
What is the sea floor?Deep down in the ocean we have the sea floor which is the region that has a lot of organisms that tend to fasten to the rocks that are found beneath the sea. Organisms are all interconnected and these deep sea dwellers also a role to play in the sustenance of the entire aquatic habitat thus the area where they live must be preserved from damage.
Owing to the fact that the ecosystem does sustain itself, we have to look at the broader picture of the things that these organisms have to contribute to the overall maintenance of the sea ecosystem. For instance, the decomposers are found among these deep sea dwellers..
If we mine the minerals from the deep sea, we would destroy the ecosystem and the habitat at the bottom of the ocean or sea.
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For Genes to become protein DNA must first be ... ?
Answer: transciped
Explanation: In order for a cell to manufacture these proteins, specific genes within its DNA must first be transcribed into molecules of mRNA; then, these transcripts must be translated into chains of amino acids, which later folded into fully functional proteins.
Answer:
Answer down below!
Explanation:
They need to be transcribed before they can become proteins!
Hope this helps!
I need help with this please
A group of related parts with specific roles that work together converts the message to a signal and send it to a receiver.
The correct option is D.
What is the communication system ?The communication system describes an information conversation between different sites. Data is sent and received in communication. The three major parts of communication are the data transmitter, the channel or medium of communication, and the data receiver.
What is an example of a communication system?The telephone, the telegraph, the cell phone, the Edison telegraph, the computer, and the TV cable are the key examples of communication systems. This system's sources can be classified as either electric or non-electric. These are the places where a message or input signal comes from.
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The complete question is -
A system is a group of related parts with specific roles that work together to achieve an observed result. The flow chart below shows a communication system. In this communication system, what does the transmitter do?
scharf, s. r., and gerhart, j. c. (1983). axis determination in eggs of xenopus laevist a critical period before first cleavage, identified by the common effects of cold, pressure, and ultraviolet irradiation. dev. biol. 99, 75-87.
Embryos show a reduction and loss of body axis structures when Xenopus laevis eggs are exposed to 1.0 degrees C for 4 minutes or 8000 psi for 5 minutes during a crucial phase before initial cleavage. The deficits develop in a dose-dependent craniocaudal progression.
In the extreme, radial symmetric, completely axis-deficient embryos are produced. The time between pronuclear contact and mitosis, which is roughly when the gray crescent forms, is when the maximum sensitivity to cold and pressure occurs. This time spans from around 0.4 to 0.8. These findings are interpreted as follows: The Xenopus laevis egg contents are reorganized during the 0.4–0.8 phase in a way that is crucial for the development of the embryonic body axis later on.
Cytoskeletal components are involved in the reorganization process; some of these components are D2O-protected and susceptible to UV, pressure, and cold. It is possible to understand rescue by oblique orientation as the outcome of a gravity-driven rearrangement of the egg's contents, replacing the impaired normal mechanochemical reaction in treated Xenopus laevis eggs.
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Which is NOT a class in the Phylum Annelida?
A. Class Hexactinellida
B. Class Hirudinea
C. Class Polychaeta
D. Class Oligochaeta
Hexactinellida is not a class in the phyllum annelida , Hirudinea, polychaeta and oligochaeta are the classes of phylum annelida.
What is annelida and what are its classes?Annelida is the phylum of the animal world which includes segmented animals like worm, leeches, and many more.Annelida group is characterized by the presence of body cavity or coelom.Annelids have organ system level of organization and they respire through body surface.Annelida is the phylum Hirudinea, polychaeta, and oligochaeta , and hexactinellida is not a class of phylum annelida.Further annelida also have well developed circulatory and digestive system.To know more about annelida visit:
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What is a difference between systemic and pulmonary circulation?
A.
Systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.
B.
Systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs.
C.
Systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body.
D.
Systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body.
The posterior axial muscle that crosses the glenohumeral joint is the __________.
The answer to this fill in blanks is latissimus dorsi. The latissimus dorsi is the posterior axial muscle that crosses the glenohumeral joint.
The latissimus dorsi muscle is a broad, flat muscle that dominates the lower posterior thorax. The primary function of the muscle is in the upper extremity, but it is also considered a respiratory accessory muscle.
The latissimus dorsi is most activated during pulling and throwing movements. The most common causes of shoulder blade pain are overuse, poor technique, or failing to warm up before exercising.
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Answer:
Explanation:The posterior axial muscle that crosses the glenohumeral joint is the Latissimus Dorsi
The latissimus dorsi muscle may be a broad, flat muscle that occupies the bulk of the lower posterior thorax. The muscle's primary function is within the upper extremity but is also considered to be a respiratory accessory muscle. Due to this muscle's broad attachment on the spinous processes, ongoing research is watching what, if any, role the muscle plays in trunk movement.
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Are white blood cells larger than red blood cells
Monocytes(white blood cells) are the largest cells of the blood (averaging 15–18 μm in diameter), and they make up about 7 percent of the leukocytes.
hydrogen is what gumdrop color
Answer:
red
Explanation:
GIVING BRAINIEST FOR CORRECT ANSWER
In which two ways do plant cells use the sugar made in photosynthesis ?
• to produce phosphate groups
• to store inorganic matter
• to supply the plant with energy for life
• to make other types of organic molecules
The two ways in which plant cells use the sugar made in photosynthesis are to supply the plant with energy for life and to make other types of organic molecules. The correct options are c and d.
What is photosynthesis?Photosynthesis is a method that plants and other lifeforms use to transform light energy into chemical energy that can then be released to fuel the organism's activities via cellular respiration.
Plants use their leaves to trap light energy during photosynthesis. Plants use the sun's energy to convert water and carbon dioxide into glucose, a sugar.
Plants use glucose for energy and to make other substances such as cellulose and starch. Cellulose is used to construct cell walls.
Thus, c and d are the correct options.
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Which term describes the rearranging of genetic material between nonhomologous chromosomes without a net loss or gain of genetic material?.
Translocation is the term that describes the rearrangement of genetic material between non-homologous chromosomes without a net loss or gain of genetic material.
Chromosome translocation is an abnormality of the chromosome that results from the rearranging of pieces on non-homologous chromosomes. When chromosomes break during meiosis and the resultant fragment is linked to another chromosome, translocations take place. It does not undergo any net loss or gain of genetic material during the process.
The exchanged sections are referred to as "translocated segments," and the reorganized chromosome is referred to as a "derivative." The translocation is balanced (i.e., neither gains nor losses of genetic material occur) and typically leads to normal development as long as there is no genetic material loss. Rarely, the breaks disconnect a gene from its regulatory element or occur within a gene, which may subsequently result in a phenotype.
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2. Which describes the alveoli?
O They have very thick walls to contain the air that enters the lungs.
They work with the villi to exchange oxygen and carbon dioxide.
They provide a large amount of surface area for gas exchange.
They are structures responsible for the production of our voice.
Alveoli work with the villi to exchange oxygen and carbon dioxide .
Alveoli are the smallest structure in the respiratory system. They are organized in bunches all through the lungs at the finishes of the parts of your respiratory tree, which is the tree-like design of paths that carries air into the lungs.
The walls of the alveoli are extremely slender. This lets oxygen and CO2 pass effectively between the alveoli and vessels, which are tiny veins.
Oxygen can pass from the alveoli to the vessels on the grounds that the centralization of oxygen is lower in the vessels than in alveoli. Essentially, CO2 moves the alternate way in light of the fact that the centralization of carbon dioxide is lower in the alveoli than in the vessels.
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Please match these to their corresponding organelle
1. nucleolus
2. ribosomes
3. mitochondria
4. lysosome
5. cell membrane
6. vesicle
7. cytoplasm
8. smooth ER
9. Golgi apparatus
10. cytoskeleton
11. nucleus
12. rough ER
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ater is considered hypoxic (lacking oxygen) if it contains 2 mg/l or less dissolved oxygen. think of the food chain that exists in the gulf of mexico: what are the types of organisms that likely live at the bottom of the gulf, where the water is most hypoxic? how can a lack of oxygen affect them? which cellular processes are affected by a lack of oxygen?
When cells are not given glucose and oxygen, necrosis, or cell death, takes place. The fact that cells can endure hypoxia is noteworthy. The intrinsic apoptotic pathway is activated by acute oxygen deprivation, and this results in a lowering of the mitochondrial membrane's potential, according to early study.
How is cellular respiration impacted by a lack of oxygen?When oxygenated blood is not given to cells, cellular membranes break down, causing anaerobic metabolism and a loss of adenosine triphosphate (ATP).
Since oxygen is needed for algae to break down, fish and other aquatic species have much less DO available to them, which has an adverse effect on their health and frequently results in fish death. Low DO in water is also brought on by the decomposition of aquatic plants and phytoplankton that are submerged.
Low oxygen levels in your bodily tissues are known as hypoxia.You may be at risk for hypoxia if you have one of several chronic heart and lung diseases. Hypoxia poses a serious risk to life.
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Which of the following examples illustrates an energy transfer between the atmosphere and hydrosphere?
A.
convection currents in the ocean mixing warmer and cooler water together
B.
plant roots absorbing water from the soil
C.
loss of heat from a geothermal vent to the surrounding cooler water
D.
polar ice reflecting the Sun's light back toward space
There are three layers called atmosphere, hydrosphere, and biosphere. The atmosphere is a layer of air. Polar ice reflecting the Sun's light toward space.
What are the atmosphere and hydrosphere?There are three layers called atmosphere, hydrosphere, and biosphere. The atmosphere is a layer of air. The hydrosphere is the layer of water. The biosphere is a layer of living organisms.
Polar ice reflects the sunlight. Polar ice will get melts when it will receive sunlight. Atmosphere is the layer around the earth made up of air. Hydrosphere is the layer of water only.
Therefore, There are three layers called atmosphere, hydrosphere, and biosphere. The atmosphere is a layer of air. Polar ice reflecting the Sun's light toward space.
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Taxol is an anticancer drug extracted from the pacific yew tree that binds to microtubules and prevents their depolymerization. Which phase of mitosis or cell division would be inhibited by treatment with taxol?.
The phase of mitosis that would be inhibited by treatment with Taxol is: metaphase.
Mitosis is the process of cell division that divides the cell into two daughter cells without affecting the genetic composition of the cells. Hence it is an equational division where the ploidy of the cells is not affected. Mitosis is accomplished in following four phases: prophase, metaphase, anaphase and telophase.
Metaphase is the second phase of mitosis where the chromosomes align at the center or the equator of the cell. This is also called the metaphasic plate. The chromosomes are also attached to the spindle fibers, which then pull them apart in the next phase which is anaphase.
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We observe that an emission feature in a star is shifted by 2 nm from its actual emission at 450 nm. How fast is this star moving with respect to us? Put answer in units of km/sec but don't enter units. Round to the nearest hundredths place
We see a star's emission feature is 2 nm off from its actual emission at 450 nm. This star is traveling at a speed of 0.675×[tex]10^{8}[/tex] km/s relative to us.
As we define velocity as, v= Δh/h×C
Here c is the speed of light and the value of C is 3×[tex]10^{8}[/tex] m/sec.
(450× 3×[tex]10^{8}[/tex])/2
0.675 ×[tex]10^{8}[/tex]
Hence the rate of moving stare is 0.675 ×[tex]10^{8}[/tex] Km/s. and effect is known as the Doppler effect.
What is Doppler effect?It is the result of a moving wave source that causes its upward shift in frequency for viewers as the source moves toward them and a drop shift in frequencies as the source moves away from them. used to determine if an object in space is traveling away from or toward us.
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During cellular respiration, four total atp are produced when pyruvic acid is created. What else is produced as a result of this reaction?.
Heat is also produced as a result of this reaction.
The process by which glucose is broken down to provide energy is known as glycolysis. It generates two pyruvate molecules, ATP, NADH, and water. There is no need for oxygen throughout the process, which occurs in the cytoplasm of a cell. Both aerobic and anaerobic creatures experience it.
Four ATP molecules (net = 2) are produced during glycolysis in addition to the pyruvic acid that is created.
However, glycolysis releases energy in the form of heat, much like all other catabolic reactions that involve the breakdown of big molecules.
Therefore, heat is also produced as a result of glycolytic reaction (cellular respiration).
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Scientists agree that the term biodiversity describes the number and kinds of species in a location on Earth. Scientists have also identified alternate measures of biodiversity, some of which are important for planning how to preserve biodiversity including genetic biodiversity as well as ecosystem biodiversity. Because all life is interconnected and because the biosphere exerts such an influence on our man's presence on Earth, it is so very important that biodiversity be preserved.
All the true statements are:
Undisturbed wild areas are important for all human recreation activities.Many plants produce secondary plant compounds that are used as medicines.Antibiotics are derived from bacteria and fungi.Maintaining the genetic biodiversity of wild species of our crops that are related to domesticated species ensures our continued food supply. Options A, C, D, and FThis is further explained below.
What is biodiversity?Generally, The range of living things, including plants, animals, fungi, and even microscopic creatures like bacteria, that are found in a certain place is referred to as that region's biodiversity.
In conclusion, Biodiversity is an essential component of our natural world.
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CQ
Scientists agree that the term biodiversity describes the number and kinds of species in a location on Earth. Scientists have also identified alternate measures of biodiversity, some of which are important for planning how to preserve biodiversity including genetic biodiversity as well as ecosystem biodiversity. Because all life is interconnected and because the biosphere exerts such an influence on our man's presence on Earth, it is so very important that biodiversity be preserved.
Why is biodiversity important to man? Check all the statements that are true.
A) Maintaining genetic biodiversity of wild species of our crops that are related to domesticated species ensures our continued food supply.
B) Most aesthetically pleasing landscapes are poor in the diversity of habitats and species.
C)Antibiotics are derived from bacteria and fungi.
D)Many plants produce secondary plant compounds that are used as medicines.
E)The ability to create new crop varieties relies on the unique properties of just one particular plant rather than a genetic diversity.
F)Undisturbed wild areas are important for all human recreation activities.
a volcano explodes and kills all but ten members of a population of primates. these ten continue to reproduce, but the allele frequency is now different from that of the original population. this is an example of , which is due to sampling error.
Some volcanic eruptions are explosive and others are not. The explosivity of an eruption depends at the composition of the magma.
If magma is thin and runny, gases can break out easily from it. whilst this type of magma erupts, it flows out of the volcano.
A very good example is the eruptions at Hawaii’s volcanoes. Lava flows hardly ever kill people because they pass slowly enough for people to get out of their way.
If magma is thick and sticky, gases can't escape easily. pressure builds up till the gases get away volcanoes and eruptions. an excellent instance is the eruption of Washington’s Mount St. Helens. on this form of eruption, the magma blasts into the air and breaks apart into portions referred to as eruptions
Tephra can range in length from tiny debris of ash to residence-length boulders.
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