Theories change to incorporate new findings.
What are theories in science?In science, a theory is a well-substantiated explanation of some aspect of the natural world that is based on a body of facts that have been repeatedly confirmed through observation and experiment. Theories provide a framework for understanding and making predictions about a particular phenomenon.
A scientific theory is not the same as a "theory" in everyday usage, where it often refers to a speculative idea or an opinion. In science, a theory must be supported by a large body of empirical evidence and must be able to withstand rigorous testing and scrutiny from the scientific community.
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whats the chromosomes ?
Answer:
In humans we have total 46 chromosomes out of which 44 are know as autosomes and rest last pair are termed as sex chromosomes. the last pairs are different in male and in female .
in female it is XX and in male it is XY
Explanation:
the last two pairs also helps in the determination of the gender of the child .
LIKE (the image) .
September 22 is the beginning of ________ in the southern hemisphere.
autumn
spring
summer
winter
Write out a summary that will go with your model to explain what it is showing. Remember that this should be scientifically accurate, but it's an explanation for elementary school students. Your summary should include:
Position and motion of the solar system (You did this in the Module 2 Check Your Learning activity! Modify your formal explanation for a younger audience.)
How the universe was formed through the Big Bang Theory (You did this in the Module 1 Check Your Learning activity! Modify your formal explanation for a younger audience.)
The planets orbit the Sun in the same plane and the Big Bang Theory states an explosion of space, marked the beginning of our cosmos.
What is Big Bang Theory?The galactic plane and the planetary orbital plane form a roughly 60° angle as the Solar System travels through the galaxy.
As it circles around the Milky Way, the Sun appears to move up and down and in and out of the galaxy.
The Big Bang, an explosion of space, marked the beginning of our cosmos. Space expanded, the cosmos cooled, and the basic elements emerged from a very high density and temperature starting point.
The first stars and galaxies were created as a result of the slow gathering of stuff by gravity.
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Using the template in the space provided for your response, construct an appropriately labeled graph that represents the data shown in table 1. based on the data, determine whether there is a statistical difference in the length of fin I between the groups of fish in slowly moving water and rapidly moving water
The Mule Deer Case: In 1906, President Theodore Roosevelt created the Grand Canyon National Game Preserve on the Kaibab Plateau in northern Arizona. Between 1907 and 1923, cattle (who was grazing the land) was greatly reduced, mule deer hunting was eliminated, and predators were killed. Over 800 cougars, 20 wolves (most had already been killed in the 1800s). and 7000 coyotes were trapped or shot. In response, the mule deer herd began to increase: by 1915, deer numbers were estimated at 25,000 50,000 by 1920; and 100,000 by 1923. (2 pts.) If the initial population of mule deer in 1906 was about 4000, graph the population growth between 1906 and 1923 and identify the type of growth curve. Explain the growth in mule deer populations in terms of carrying capacity after the creation of the preserve. > The initial population of Kaibab deer in 1906 was about 4000. In a preserve area of about 800,000 acres, the average deer density was one deer per 200 acres. Calculate the densities in 1015, 1920 and 1923? Graph it Predict what happened with the mule deer population after 1923 and explain the reasons for changels). B) Life table for the paine population on TWU cangpust. da u La Tua 6-18 1-2y 142 198 110 LI ..... Hy 58 1 27 4.Sy 5-69 5 Fill in the columns in the above table that help plot the survivorship and mortality curves. Use the explanations for calculations starting on pages 176-177 of your textbook. Plot the survivorship and mortality curves for this population based on the data in your table. Hand drawings of the graphs are not acceptable. Use Excel. C) Read the interaction scenarios below and decide whether the interaction is competition, commensalism, predation, parasitism, or mutualism. Mention which ones are symbiotic. (1.25 pts.) • Scenario A: You are camping in the meadow. A female mosquito smells you. She finds a piece of exposed skin, drills her proboscis through your skin to find a capillary, and sucks up your blood. . Fill in the columns in the above table that help plot the survivorship and mortality curves. Use the explanations for calculations starting on pages 176-177 of your textbook. Plot the survivorship and mortality curves for this population based on the data in your table. Hand drawings of the graphs are not acceptable. Use Excel C) Read the interaction scenarios below and decide whether the interaction is competition, commensalism, predation, parasitism, or mutualism. Mention which ones are symbiotic. (1.25 pts.) Scenario A: You are camping in the meadow. A female mosquito smells you. She finds a piece of exposed skin, drills her proboscis through your skin to find a capillary, and sucks up your blood Scenario B: The next day you notice some colorful flowers. A butterfly walks over a brightly blooming inflorescence. It finds nectar stored inside the flowers and suck it. In the process it gets pollen smeared on its body. When it is finished hunting for nectar. it flies to another flower of the same species to find more nectar. Some of the pollen gets scraped of onto the second flower. Scenario C A hawk soars over the meadow. Its sharp eyes spot a field mouse. The hawk drops into a steep dive and catches the mouse in its talons. Then it flies away. to feed the dead mouse to its nestlings Scenario D: On the edge of the meadow there is a large tree. Growing on the tree's bark is a circular gray-green lichen, about 6 inches in diameter. The lichen is using the tree for habitat. The trunk gets sun and the lichen isn't competing with other organisms for space. The tree hardly notices the lichen; it isn't eating the tree or taking resources from the tree. Scenario E: In the wetter part of the meadow there is standing water. In the shallow water, a cattail (a tall grassy plant) and a rush (another kind of grassy plant) are both growing. The cattail and the rush both prefer the same kind of habitat, both need sunlight, and both are sucking up nitrogen and other nutrients from the marsh mud. O 6 148 D Dashboard Calendar To Do Notifications Inbox
The deer density in 1923 was one deer per 8 acre. Pet capita rate of growth of deer population is influenced by carrying capacity (K).
Population distribution is the spatial arrangement of individuals of a given species in a particular area at a given time. They may be influenced by factors like resource availability, climate, topography, vegetation, etc. The growth of mule deer population in terms of carrying capacity can be explained with the help of logistic growth.
In logistic growth, the per capita rate of growth of a population gets smaller as the population approaches a maximum number influenced by the number of limited resources available. This rate is known as the carrying capacity, denoted by K. The initial growth in logistic growth is exponential, where this carrying capacity first increases.
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4. Applying life skill and its components in our academic career boosts our academic achievement. Please argue "for or against" this idea and demonstrate your arguments with satisfying examples.
A new careers program will assist primary school students by encouraging them to consider potential vocations early on, while also cultivating dreams and dispelling misconceptions.
What is Academic career?Children begin to think about their futures as they enter primary school, according to the evidence.
The software will make learning more engaging and excite students about the working world by age-appropriately connecting lessons to various occupations, training, and skills.
Additionally, it will give students the chance to network with companies and role models across a variety of industries, raising aspirations and connecting their education to potential future employment and vocations.
Therefore, A new careers program will assist primary school students by encouraging them to consider potential vocations early on, while also cultivating dreams and dispelling misconceptions.
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Question 10 of 10
In which two processes do cells make a small amount of ATP for every
glucose molecule split in two?
A. Glycolysis
B. Fermentation
C. The electron transport chain
D. The Krebs cycle
SUBMI
Glycolysis and Kreb's cycle are two processes in which cells make a small amount of ATP for every glucose molecule split in two.
Describe glycolysis.
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.
An overall net of two ATP molecules will be created during fermentation and glycolysis. To prevent glycolysis from ceasing, fermentation will produce 2 ATP, and glycolysis will produce 2 ATP through substrate level phosphorylation. There is no electron transport system involved in fermentation, and no ATP is produced during the fermentation process itself. Two ATP, six NADH +H+, and two FADH2 were created during the Krebs cycle. Due to the two pyruvic acid molecules that enter the system for every glucose molecule, two ATP molecules are produced.
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Which phrase describes an example of homeostasis?
A. Maintenance of a healthy blood pressure
B. Exposure of skin to harmful rays
C. Overproduction of white blood cells
D. Loss of blood due to an injury
During amplification light is generated by probe molecules binding to____
'During amplification light is generated by probe molecules binding to the target gene sequence, which makes reference to the real time qPCR analysis.
What is the real time qPCR analysis?
The real time qPCR analysis is a widely used technique in molecular biology that serves to detect the expression level of genes in a machine that uses fluorescent probes that bind to the target genomic region of interest.
Therefore, with this data, we can see that the real time qPCR analysis is a technique used to detect the relative expression level of a gene.
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What is the temperature danger zone ? What is its significance in food preparation ?
Answer: The danger zone is typically between 40°F (4°C) and 140°F (60°C). The temperature danger zone refers to the temperature range in which bacteria can multiply rapidly on food.
Explanation: The significance of the temperature danger zone in food preparation is that it represents the conditions in which bacteria can grow and cause foodborne illnesses. When food is held at temperatures within this range, bacteria can multiply at a rapid rate, increasing the risk of food contamination and the potential for foodborne illnesses.
Proper cooking and reheating temperatures are essential to kill harmful bacteria in food. Cooking foods to their recommended internal temperatures helps ensure that bacteria are destroyed and the food is safe to eat.
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Explain the life cycle of plasmodium species?
Answer:
Explanation:
life cycle of plasmodium species
What relationship can be determined from the following information: . The radioactive isotope iodine 131 has a half-life of 8.1 days and emits 0.8 MeV (milli-electronvolts) of energy . The radioactive isotope phosphorus 32 has a half-life of 14.3 days and emits 1.7 MeV of energy . The radioactive isotope phosphorus 33 has a half-ife of 25.5 days and emits 0.25 MeV of energy . The radioactive isotope sulfur 35 has a half-lfe of 875 days and emits 0.2 MeV of energy Multiple Choice O The longer the half-lIfe, the more energy emitted by the particles O The longer the hif ife the les energy emited by the porticles O Redotoopes of he same elemen must enst the same amountof energy in their emissions of the same element must emit the same amount of energy in their emissions and decay at the same rate. O Adjusted for time, radioisotopes emit the same amount of energy in their emissions O Energy and half-life are not directly related.
Option E: energy and half-life are not directly related, is the relationship determined from the given information about the radioactive isotope.
Half-life is the amount of time required by a nucleus if a radioactive isotope to lose half of its radioactivity. Each radioactive isotope has its own particular half-life that cannot be altered because of external and alternating factors like those of quantity and form of the material.
A radioactive substance is highly unstable and thus loses its energy by decaying. This means that the energy lost is directly proportional to the amount of the substance present. But energy of a radioactive substance is independent of it's half-life of decaying. This means that option E is the correct choice.
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What were the gases used to create earths primitive oceans and what were the contents of the liquid pool after the experiment ran for a week
The gases used to create Earth's primitive oceans are methane, ammonia, water vapor, and hydrogen. The contents of the liquid pool after the experiment are variety of organic compounds.
What are gases?
Gases are a form of matter consisting of particles that have no definite shape or volume but occupy the entire space they are contained in. Gases are made up of atoms or molecules that are in constant motion and can move in any direction. Examples of gases include air, helium, hydrogen, nitrogen, and oxygen.
The Miller-Urey experiment was designed to simulate the conditions that may have existed on the early Earth, where the atmosphere was thought to have been rich in gases like methane, ammonia, water vapor, and hydrogen. These gases were used to create Earth's primitive oceans in the experiment. In the experiment, the gases were placed in a closed system, and an electric spark was used to simulate lightning, which was believed to have been abundant on the early Earth. After running the experiment for a week, the liquid pool contained a variety of organic compounds, including amino acids, which are the building blocks of proteins.
Therefore, methane, ammonia, water vapor, and hydrogen are used to create Earth's primitive oceans.
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2. For the following DNA strand, intron sequences are underlined. Use this strand to write
out both the nRNA and mRNA sequence in the space below (2 marks).
AACAT GCTACATGG GATCATGCATGCATG CA
The nRNA and mRNA sequence will be:
AUGCA UCUGUCAACC GAUCAGUCAGUCAGU CGAUGCA UCUGUCAACC GAUCAGUCAGUCAGU CGHow to find mRNA sequence after splicing?To determine the nRNA and mRNA sequence from the given DNA strand, you need to first transcribe the DNA into mRNA. This process is called transcription and involves copying the DNA sequence into a complementary RNA molecule, which is called messenger RNA (mRNA). During transcription, the introns are spliced out, and the exons (the parts of the DNA that code for protein) are joined together to form the final mRNA sequence.
So for the given DNA strand:
AACAT GCTACATGG GATCATGCATGCATG CA
The mRNA sequence would be:
AUGCA UCUGUCAACC GAUCAGUCAGUCAGU CG
The final mRNA sequence, after splicing out the introns, would be:
AUGCA UCUGUCAACC GAUCAGUCAGUCAGU CG
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When the ventricles are relaxed, the ______ are loose and there is no resistance to the flow of blood from atrium to ventricle.
When the ventricles are relaxed, the atrioventricular (AV) valves are loose and there is no resistance to the flow of blood from atrium to ventricle.
The AV valves, also known as the mitral and tricuspid valves, are located between the atria and ventricles of the heart. These valves open to allow blood to flow from the atria into the ventricles during the diastole phase of the cardiac cycle, when the ventricles are relaxed and the atria contract to push blood into the ventricles. The AV valves are supported by chordae tendineae and papillary muscles, which prevent the valves from flipping back into the atria during ventricular contraction (systole). However, when the ventricles are relaxed, the chordae tendineae and papillary muscles also relax, allowing the AV valves to open and blood to flow from the atria to the ventricles without any resistance.
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Can you help me with this
The ability to form a covalent bond between its amino and carboxyl groups.
What is covalent bond?
A covalent bond is a type of chemical bonding that occurs between two non-metallic atoms. This type of bond is formed when the outer valence electrons of each atom are shared between the two atoms, resulting in the formation of a chemical bond. Covalent bonds are strong and can be found in a variety of molecules, including water and carbon dioxide. This type of bond is often found in many organic molecules, including proteins, carbohydrates, and DNA. Covalent bonds are important for the stability of many molecules and are responsible for the unique properties of many substances. Covalent bonds can be single, double, or even triple bonds depending on the number of electrons shared by each atom. In general, the strength of a covalent bond is determined by the number of electrons shared between the two atoms, as well as the distance between them.
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How is an organ system within the human body defined by the functions it performs?
Answer:
They are defined in the body because an organ system comprises of group of different organs that make up a system performing several biological functions and those functions fit in to the systems performance and functions. Organs consist of specialized tissue that work together to perform functions.
1. Form a Hypothesis Would this therapy work if mRNA were replaced with other types of
RNA, such as ribosomal RNA (rRNA) or transfer RNA (tRNA)? Use evidence to support
your hypothesis.
NOTEBOOK
This therapy work if mRNA were replaced with other types of RNA, such as ribosomal RNA (rRNA) or transfer RNA (tRNA), nRNA (nuclear RNA)
Where the mRNA is found?mRNA is found in the cytoplasm. It is transcribed from DNA and it is translated to produce protein molecules. tRNA or the transfer RNA carries amino acids to the mRNA.
tRNA has an anticodon loop that base pairs with the codon of mRNA and recruits the correct amino acid for the respective codon. rRNA or ribosomal RNA is found in the nucleus associated with ribosomes. rRNA helps in the assembly of ribosomes during protein synthesis in the cell.
Therefore, This therapy work if mRNA were replaced with other types of RNA, such as ribosomal RNA (rRNA) or transfer RNA (tRNA), nRNA (nuclear RNA)
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Why does cooking food causes a change of temperture? Why does the cooked food with higher temperature before it was cooked ? Relate this to kinetic energy from coal the same amount of energy when it transformed to thermal and light energy?
Answer:
Explanation:
At a given temperature, denser materials generally contain more energy, and so heavier pans will cook food faster. (Conversely, it takes more energy to raise denser materials to a certain temperature.) At a given temperature, materials with a higher specific heat capacity will contain more energy.
Genome maps provide the dna sequences of chromosomes. Some scientists have compared the genome maps of a hedgehog and a sloth. What do these genome maps allow the scientists to determine?.
Evolutionary relationships: Genome mapping can aid researchers in understanding the evolutionary relationships between various species.
What can researchers learn from genomic maps?Genome mapping is a method for locating genes on a chromosome and calculating their distances from one another. Linkage mapping, another name for genetic mapping, can provide solid proof that a condition passed from parent to kid is connected to one or more genes.
Why are other organisms' genomes being sequenced by scientists?Understanding genomes and their function in the development of organisms is improved through genome sequencing. An organism's DNA is used to identify the order of its base pairs, which are coded by the letters A, C, T, and G, when scientists sequence a genome.
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QUESTION: Can you hypothesize different uses
for sedimentary rock in our society?
Answer:
please like
Explanation:
Our main energy sources, coal, natural gas, oil, and uranium, are created in and come from sedimentary rocks. Sediment provides sand and gravel for construction. Stone used in construction includes sandstone and limestone. Plaster is produced using rock gypsum.
Male patterned baldness is a sex-linked recessive disorder that
causes people to lose their hair at a younger age. It occurs more
often in males than females. A father who is not bald and a mother
who is a carrier for this trait have offspring. Select all of the
possible genotypes for their kids.
Choose all that apply:
X B x b
X b X b
X B Y
YY
The possible genotypes of the offspring are given below: XY, XXb, XY, XXb
What are sex-linked recessive disorders?Genetic disorders connected to mutations in genes on the X chromosome are referred to as having X-linked or sex-linked recessive inheritance. Because he contains just one X chromosome, a male who carries this mutation will be affected. A female who carries a gene mutation in one X chromosome but has a normal gene on the other X chromosome usually has no symptoms.
The possible genotypes of the offspring of a father who is not bald and a mother who is a carrier for this trait is given below:
XY x XXb ---> XY, XXb, XY, XXb
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A student wants to use objects she finds around the house to model Mercury, Venus, and Earth. Which model best compares the relative sizes of these three planets? a. Three basketballs b. Two basketballs and one softball c. Two softballs and one basketball d. One marble, one softball, and one basketball
The answer is D, she can make use of One marble, one softball, and one basketball
What are planetary bodies?According to the geophysical definition of celestial objects, a planetary-mass object (PMO), planemo, or planetary body is any celestial object big enough to establish hydrostatic equilibrium (to be spherical under its own gravity), but not enough to support core fusion like a star.
What different kinds of celestial bodies are there?
Planets.StarsSatellites.Comets.Asteroids.Meteors and Meteorites.Galaxies.Learn more about planetary bodies here:
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PLEASEEEEE HELP I ONLY NEED NUMBER 1
The diagram shows a constructive interference because the two waves overlap and their crests combine to form a larger wave that continues on in the opposite direction.
What is a constructive interference?Constructive interference is a type of wave behavior that occurs when two or more waves combine in such a way as to reinforce each other, resulting in a wave with a greater amplitude (height) than the individual waves. This occurs when the waves are "in phase" with each other, meaning that the crests and troughs of the waves align precisely.
In other words, constructive interference occurs when the waves are "in sync" and reinforce each other, producing a wave that is stronger than any of the individual waves.
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Which of these is not an advantage of genetically engineered crop plants?
A. They can produce their own pesticides.
B. They can grow larger than unmodified crops.
C. They cannot cause an allergic reaction.
D. They can contain extra nutrients.
Answer:
b
Explanation:
GMO foods are designed to be healthier and cheaper to produce. The advantages of GMO foods include added nutrients, fewer pesticides, and cheaper prices. Disadvantages of GMO foods can be allergic reactions or increased antibiotic resistance
Think and discuss: What can a scientist do to improve the accuracy of their cladograms?
Cladograms are diagrams used in biology to show the evolutionary relationships between different species or groups of organisms, and some ways that a scientist can improve the accuracy of their cladograms are by using multiple sources of data, choosing appropriate outgroup species, using statistical methods, considering convergent evolution, etc.
To construct an accurate cladogram, it is important to use multiple sources of data, such as physical traits, DNA sequences, and fossil records. An outgroup species is a species that is closely related to the group being studied but not a part of it. By choosing an appropriate outgroup species, scientists can better identify shared characteristics that are unique to the group being studied and therefore construct a more accurate cladogram.
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Fat around organs
a-chemical messenger
b-protection
c-structure of cell membranes
Fat around organs are mostly used as a form of protection as it provides a from of cushion to reduce the effects of stress.
What is Visceral body fat?This is also known as 'hidden' fat, and it is referred to as a type of fat which is stored deep inside the belly, wrapped around the organs, including the liver and intestines.
Fat around organs are mostly used as a form of protection as it provides a from of cushion to reduce the effects of stress and other unpleasant situations to ensure that the organs aren'rt damaged and are able to perform optimally.
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What is the genetic relateness among:
Parent and offspring
Grandparent and offspring
Full siblings
Half siblings
First cousins
Aunts/Uncles and Nieces/Nephews
Answer: Definition. Full siblings share the same biological mother and father, maternal half-siblings share the same mother only, and paternal half-siblings share the same father only. Therefore, full siblings share, on average, 50% of their genes with one another and half siblings share approximately 25%.
Explanation:
A species of bird has migrated to an island where their population is growing rapidly due to a lack of predators. Identify three limiting factors to the population size, and describe the effect of each.
Answer:
A species of bird that has migrated to an island where their population is growing rapidly due to a lack of predators may experience the following limiting factors:
Food resources: One limiting factor could be the availability of food resources. If the bird population grows too quickly and consumes all of the available food, the population may be limited by a lack of food. This can result in reduced growth, starvation, and decreased survival rates.Disease: Another limiting factor could be the presence of disease. If a disease outbreak occurs, it could reduce the population size and limit its growth.Breeding habitat: The bird population may also be limited by the availability of suitable breeding habitat. If the island becomes overcrowded, the birds may not have access to enough space to build nests, mate, and rear their young. This could result in decreased breeding success, reduced population growth, and ultimately a decrease in population size.In conclusion, the growth of the bird population on the island may be limited by the availability of food resources, the presence of disease, and the availability of suitable breeding habitat. These factors can have a significant impact on the population size and its ability to sustain itself over time.
What is a solution's molarity, if its absorbance is 0.4?
The molarity is 0.07 M when the absorbance is 0.4
What is Molarity?Molarity is a unit of concentration that measures the amount of a solute present in a solution in terms of the number of moles of solute per liter of solution. Mathematically, it is defined as the ratio of the number of moles of solute to the volume of the solution in liters:
Molarity (M) = number of moles of solute / volume of solution in liters
In the problem, the plot of absorbance against molarity is attached and the graphed is used to read the molarity when the absorbance is 0.4.
The value from the graph is 0.07 M
complete question is attached
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