The number of formal assessments prescribed for learners per term in Natural Sciences and Technology is two (option B).
What are formal assessments?Formal assessment is carried out to obtain reliable records that will enable the teacher to determine a learner's overall competence in the Learning Outcomes and Assessment Standards.
Collectively over the year the formal assessment tasks should enable the teacher to make informed, valid judgments about various levels of performance and learner competence in Natural Sciences.
The number of formal assessments that should be prescribed for learners in natural science and technology is 2 per term.
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Katie designed an experiment using a paint roller pan, sand, and water. The steps of the experiment are listed below.
Put 3 inches of moist sand on a paint roller pan.
Make a beach by scooping the sand toward the higher portion of the pan.
Pour water into the deeper end of the pan.
Use a straw to blow (simulate wind) on the water for 2 minutes to create waves.
Observe how the sand is displaced by the waves.
Katie's model most likely represents the interactions between the (4 points)
atmosphere, ocean, and geosphere
geosphere, ocean, and biosphere
atmosphere, ocean, and biosphere
cryosphere, biosphere, and ocean
ANSWER: atmosphere ocean and biosphere is WRONG; please find correct answer
Katie's experiment most likely represents the interactions between the atmosphere, ocean, and geosphere, option A is correct.
The moist sand on the paint roller pan represents the geosphere, the water represents the ocean, and the straw blowing represents the atmosphere. By creating waves with the straw, Katie is simulating the wind's effect on the ocean, which is an important interaction between the atmosphere and the ocean.
The displacement of sand by the waves is an example of how the geosphere can be affected by the ocean's movements. Therefore, the most likely interactions being represented are between the geosphere, ocean, and atmosphere. These interactions are crucial for the Earth's climate and weather patterns and play an important role in shaping the physical environment, option A is correct.
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The correct question is:
Katie designed an experiment using a paint roller pan, sand, and water. The steps of the experiment are listed below. Put 3 inches of moist sand on a paint roller pan. Make a beach by scooping the sand toward the higher portion of the pan. Pour water into the deeper end of the pan. Use a straw to blow (simulate wind) on the water for 2 minutes to create waves. Observe how the sand is displaced by the waves. Katie's model most likely represents the interactions between the:
A) atmosphere, ocean, and geosphere
B) geosphere, ocean, and biosphere
C) atmosphere, ocean, and biosphere
D) cryosphere, biosphere, and ocean
Which characteristic is common to most types of
cancer?
(1) production of low levels of ATP
(2) inadequate levels of antigens
(3) rapid and uncontrolled cell division
(4) destruction of red blood cells
Pressure is the driving force behind water movement in a(n)
A aquifer
B artesian well
C drilled well
D river
Pressure is the driving force behind water movement in an aquifer.
What is aquifer ?A layer of porous rock, soil, or gravel that can store and convey water is known as an aquifer.
Therefore, The water table level and the hydraulic conductivity of the aquifer's composition can both affect the pressure within it. Water movement in an aquifer is fueled by this pressure differential which can lead water to flow from high-pressure to low-pressure regions.
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1. The image below shows the energy transfer within a pond ecosystem. Predict how the flow of energy within the pyramid would and would not change if trees surrounding the pond grew tall enough to completely shade the pond.
The energy would move from the phytoplankton to the zooplanktons all the way up to the musky.
Energy transfer in an aquatic ecosystemEnergy is moved through a food web or food chain in an aquatic ecosystem. Producers at the base of the food chain, like phytoplankton and aquatic plants, use photosynthesis to convert solar energy into organic matter.
The energy is then transferred to the secondary consumers, which include larger fish and predatory invertebrates, who eat the primary consumers. Tertiary consumers, such as apex predators like sharks or killer whales, and so forth, eat secondary consumers.
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2. An enzyme was isolated from wild-type bacteria (WT). Three mutant forms of this same enzyme were made using a mutagenesis technique, and then each mutant enzyme (1E8, 5F8, D249G) was isolated. All four samples of purified enzymes were tested for thermal stability. To do this, each enzyme was incubated at the temperatures indicated on the graph for 15 minutes and then tested for the percentageof original catalytic activity that remained after the heat treatment. Describe the effects of the mutations on the thermal stability of the wild-type enzyme. Analyze the data to rank the four in order from least heat-stable to most heat-stable. (3 points)
Based on the graph , it is evident that the three mutant chemicals (1E8, 5F8, D249G) have lower warm soundness than the wild-type (WT) protein. At all temperatures tested, the WT chemical held a better rate of its unique catalytic movement compared to the mutant chemicals.
What is the enzyme about?The graph shows the rate of unique catalytic action that remained after warm treatment for each chemical at diverse temperatures. The higher the rate, the more heat-stable the chemical is.
In conclusion, the positioning of the proteins in arrange from slightest heat-stable to most heat-stable is 5F8, D249G, WT, and 1E8, based on the information given within the chart.
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55. A person with Korsakoff's syndrome is most likely to develop: A. Parkinson's disease. B. hemophilia. C. Huntington's disease. D. anterograde amnesia.
A person with Korsakoff's syndrome is most likely to develop Parkinson's disease. Therefore, option (A) is correct.
Korsakoff syndrome (also known as Korsakoff's amnesic syndrome) is a memory disorder that results from vitamin B1 deficiency and is associated with alcoholism. Korsakoff's syndrome damages nerve cells.
Korsakoff syndrome causes problems learning new information, inability to remember recent events and long-term memory gaps. Memory difficulties may be strikingly severe while other thinking and social skills are relatively unaffected.
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Explain how membrane receptors transmit messages across the cell membrane.
The first step is the break down of _____ in between the strands
Answer:The answer is DNA
When Jocelyn first went to work for a well-known clothing retailer, she couldn't stand one of her coworkers. But now that she has worked with her coworker for a year, she doesn't mind her at all. This is an example of:
A. mere exposure effect
B. fundamental attribution error
C. in-group theory
D. scapegoat theory
Jocelyn change of attitude can be described as mere exposure effect. Option A
What is mere exposure effect?The mere exposure effect is a situation where people tend to develop a preference for things when they are familiar with them. The more a person is exposed to somethng, they tend to become used to it and like them even.
The theory behind the mere exposure effect is that repeated exposure to a stimulus increases our feelings of comfort and familiarity. This can leads to a positive evaluation of the external stimuli.
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Please help and thank you
Answer: Remove waste
Explanation: It’s a diagram of the Urinary system.
Three species of North American warblers are found to feed in different parts of the same spruce tree. This particular behavior of warblers displays which ecological characteristic?
A.
They cannot share the same niche in the same habitat.
B.
They can have more than one niche in an environment.
C.
Their niche is to help control the tree growth.
The behavior of the three species of North American warblers, feeding in different parts of the same spruce tree, displays the ecological characteristic that (B) They can have more than one niche in an environment.
A niche refers to the specific role or way of life that an organism occupies within an ecosystem. It encompasses the physical environment, resources, and interactions with other organisms. The behavior of the warblers demonstrates that they are utilizing different resources and occupying different parts of the same tree, indicating that they have partitioned their niche in order to avoid competition.
This behavior is an example of niche differentiation, where different species that occupy the same ecosystem utilize different resources and occupy different niches in order to coexist. This is a common ecological strategy for species that live in the same area, as it allows for the maximum utilization of resources and reduces competition between species.
Therefore, the correct option is B. They can have more than one niche in an environment.
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Some people have their chromosomes examined to check for predispositions to various illnesses, such as breast cancer. What would be the pros and cons of checking for genes associated with psychological disorders?
Genetic testing for psychological disorders may have some benefits like early detection of disorder, but it also poses significant ethical and practical challenges that must be carefully considered before widespread adoption.
The pros of checking for genes associated with psychological disorders include the potential for early detection and intervention, which could lead to more effective treatment and improved outcomes. Knowing one's genetic predisposition could help individuals make informed decisions about their lifestyle and environment to mitigate the risk of developing certain disorders.
The cons to consider like genetic testing for psychological disorders is still in its infancy, and there is limited understanding of the complex interplay between genetics and environmental factors. This means that testing results may not always be accurate or reliable, and false positives or false negatives could lead to unnecessary worry or complacency, respectively.
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HELP PLEASE Name any two of the major types of chemical substances that are broken down in chemical digestion. For each substance, name an enzyme that breaks them down and what final product is actually absorbed by the body for use or storage.
Two major types of chemical substances that are broken down in chemical digestion are carbohydrates and proteins. Carbohydrates are broken down by the enzyme amylase, which is found in saliva and the pancreas.
Proteins are broken down by a group of enzymes called proteases, which are produced by the stomach and pancreas. Proteases break down proteins into smaller peptides and individual amino acids, which can be absorbed by the body and used to build new proteins or as a source of energy. Overall, the breakdown of carbohydrates and proteins in chemical digestion is crucial for the body to obtain the nutrients it needs for energy, growth, and repair. Amylase breaks down complex carbohydrates into simpler sugars, such as glucose and fructose, which can be absorbed by the body and used for energy or stored as glycogen in the liver and muscles.
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explain how a person can become addicted to a drug on a cellular level 
For each item below, specify the independent and dependent variables, as well as constants.
1. The time it takes to run a mile depends on the person's running speed.
2. A study was done to find if different tire treads affect the braking distance of a car.
3. The height of bean plants depends on the amount of water they receive.
4. The higher the temperature of the air in the oven, the faster a cake will bake.
5. Lemon trees receiving the most water produced the most lemons.
6. An investigation found that more bushels of potatoes were produced when the soil was
fertilized more.
7. Students measured the temperature of the water at different depths in Lake Skywalker and
found that the temperature varied.
8. The amount of pollution produced by cars was measured for cars using gasoline containing
different amounts of lead.
9. Four groups of rats are first massed and then fed identical diets except for the amount of
vitamin A they receive. Each group gets a different amount. After 3 weeks on the diet, the rats
masses are measured again to see if there has been a decrease.
For each of the given items, the independent and dependent variables, as well as constants are those variables that produce a change in another, the variable that depends on another to change, and that which does not change respectively.
What are dependent and independent variables?In a scientific experiment, an independent variable is a variable that is altered or controlled to see how it affects the dependent variable. In a scientific experiment, the variable under test and being measured is known as the dependent variable.
A constant in an experiment does not vary but remains unchanged at the end of the experiment.
Considering the given items, the independent and dependent variables, as well as the constants are as follows:
Independent variable: running speed; Dependent variable: the time it takes to run a mile; Constant: distance of the runIndependent variable: tire treads; Dependent variable: braking distance of a car; Constant: speed of the carIndependent variable: the amount of water; Dependent variable: height of bean plants; Constant: type of bean plantIndependent variable: temperature of the air in the oven; Dependent variable: the time it takes for a cake to bake; Constant: type of cakeIndependent variable: the amount of water; Dependent variable: the number of lemons produced; Constant: type of lemon treeIndependent variable: the amount of fertilizer; Dependent variable: number of bushels of potatoes produced; Constant: soil typeIndependent variable: depth of the water; Dependent variable: temperature of the water; Constant: time of dayIndependent variable: the amount of lead in gasoline; Dependent variable: the amount of pollution produced by cars; Constant: type of carIndependent variable: the amount of vitamin A; Dependent variable: change in rat mass; Constant: type of rat, diet composition, feeding schedule, etc.Learn more about dependent and independent variables at: https://brainly.com/question/25223322
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DNA sequence 90 nucleotide long, 31 is deleted, how many amino acids likely impact in the gene.
a fossil that is older than 200 million years old can be found on land due to plate tectonics
A fossil that is older than 200 million years old can be found on land due to plate tectonics.
Plate tectonics is the movement and interaction of large sections of the Earth's lithosphere (outermost layer of the Earth) over the asthenosphere (part of the Earth's mantle). This movement can cause the formation of mountains, oceans, and the breakup of continents over millions of years. The movement of plates can also result in the uplift and exposure of rock layers that were previously buried deep beneath the surface, including those containing fossils that are millions of years old.
Therefore, it is possible to find fossils that are more than 200 million years old on land due to plate tectonics, but the process of uplift and exposure of such rocks may take millions of years and require various geological processes.
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--The complete question is, a fossil that is older than 200 million years old can be found on land due to plate ________.--
Define self-fulfilling prophecy and confirmation bias. How are they different from each other?
Answer:
Self-fulfilling prophecy focuses on the behavior of the perceiver in electing expected behavior from the target, whereas behavioral confirmation focuses on the role of the target's behavior in confirming the perceiver's beliefs.
Explanation:
I hope this is helpful. :)
The diagram below represents a stack of rock layers. Examine the diagram, and answer the question that follows.
What do these layers and their fossils suggest about Earth's history?
A.
There have been changes in Earth's lifeforms over time.
B.
Lifeforms on Earth have been the same over time.
C.
No lifeforms were present when these layers formed.
D.
Only one kind of lifeform lived where these layers formed.
Fossils are animals and vegetable remains that get deposited or printed in sedimentary layers. Option A is correct: There have been changes in Earth's lifeforms over time.
What is a fossil?
Fossils are animal and vegetable rests found in different strata of sedimentary rocks. Sedimentary layers deposit chronologically, so they are used to reflect history. They keep in each layer some of the forms of life that inhabited that area in the past.
Fossils are very useful while dating ages. Index fossils are the fossilized organizms that only used to exist in a given era or geological period during evolution.
Fossil registers show that similar or different structured have been inhabiting the same area in the same period of time.
According to this framework, we can assume option A is correct: There have been changes in Earth's lifeforms over time.
In the image, from the bottom (oldest layers) to the upper part (most recent layers), we can see how the organisms inhabiting this area changed with the pass of time.
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I NEEDDD HELP LIKE RIGHT NOW ITS SIMPLE
What is the best description of originality?
nonobvious
special or interesting
convergent
having a low probability, unique
The best description of originality is having a low probability, unique, option D is correct.
Originality refers to the quality of being novel and distinctive, and it implies that something is not derived from anything else. The more unique and uncommon an idea, creation, or expression is, the more original it is deemed to be. Originality can be measured by the probability of its occurrence.
The lower the probability of an idea or creation being generated, the more original it is. A highly original idea is not only new but also unexpected and unconventional, which makes it stand out from the norm. Originality is highly valued in fields such as art, literature, science, and technology, as it contributes to the advancement of knowledge and understanding, option D is correct.
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The correct question is:
What is the best description of originality?
A) nonobvious
B) special or interesting
C) convergent
D) having a low probability, unique
list the correct names next to each number in the hydrologic water cycle. use the textbook or writing tool
The correct names next to each number in the hydrologic or water cycle is as follows;
1. Evaporation/Transpiration
2. Condensation
3. Precipitation
4. Surface runoff
What is water cycle?The hydrologic or water cycle involves the continuous circulation of water in the Earth-Atmosphere system.
Water is necessary to sustaining life on Earth, and helps tie together the Earth's lands, oceans, and atmosphere into an integrated system.
Precipitation, evaporation, freezing, melting and condensation are all part of the hydrological cycle. The correct names of the labelled parts in the diagram are as given above.
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A tropical rainforest has a hot climate with very heavy rainfall throughout the year. The region, therefore, experiences high humidity and warm temperatures at all times during the year. Such a climate favors dense growth of trees and plants, such as mangroves, vine, and coconuts. This vegetation helps in supporting large populations of several types of species. The map below represents the different locations of tropical rainforests as well as other biomes present across the world. Adapted from image courtesy of USDA-NRCS, Soil Survey Division, World Soil Resources, Washington D.C. Based on this information, which of the following factors is responsible for influencing the climate of tropical rainforests? A. the type of soil found in the region B. the location of the region near the equator C. the trees and plants growing in the region D. the population of all species of the region
The Philippines participates in several international protocols and treaties about reducing the effects of
environmental problems. What do you think our country can further do to reduce the harmful effects of
human activities on the atmosphere?
There are several actions that the Philippines can take to further reduce the harmful effects of human activities on the atmosphere. Here are some suggestions: Promote the use of renewable energy sources, Strengthen laws and regulations on air pollution, Encourage sustainable transportation and Increase public awareness and education
Promote the use of renewable energy sources: The government can provide incentives and subsidies for the development and use of renewable energy sources such as solar, wind, and hydropower. This would help reduce the country's reliance on fossil fuels, which contribute to greenhouse gas emissions.
Strengthen laws and regulations on air pollution: The government can enforce stricter laws and regulations on industries and vehicles that emit pollutants into the air. This would help improve the air quality in cities and reduce the incidence of respiratory illnesses.
Encourage sustainable transportation: The government can promote the use of public transportation, carpooling, and cycling, which are more sustainable alternatives to private vehicles. This would help reduce traffic congestion and greenhouse gas emissions.
Overall, it is important for the government and the public to work together in addressing the challenges of climate change and reducing the harmful effects of human activities on the atmosphere.
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DNA sequence of a particular gene is nine nucleotides long if the 31st nucleotide is deleted how many amino acids will the mutation likely impact in the gene
Answer:
dnx
Explanation:
lacreta miloco haichoo lade
The process by which each gamete receives one allele of a gene is known as:
a. mendel’s second law of inheritance
b. dominant inheritance
c. recessive inheritance
d. mendel’s first law of inheritance
Answer:
D. Mendel's first law of inheritance, also known as the law of segregation, states that during the formation of gametes, the two alleles (one from each parent) segregate from each other, so that each gamete only receives one allele for each gene.
2. Suppose that the carrying capacity for Arctic hares in a particular ecosystem is estimated to be 1000. Biologists survey the population and find that population numbers are currently 450.
max=birth rate - death rate logistic growth rate = ax N(K-N)/K
If the annual birth rate of the population is 15 per capita, and the annual death rate is 8 per capita, what is the overall growth rate of this population? Round your result to the nearest whole number. (3 points)
The overall growth rate of this population is approximately 1 individual per year.
Growth rate calculationUsing the logistic growth equation:
max =birth rate - death rate logistic growth rate = ax N(K-N)/Kwhere:
a = the maximum per capita growth rate of the populationN = the current population sizeK = the carrying capacity of the ecosystemMaximum per capita growth rate:
a = (max - min) / Ka = (15 - 8) / 1000a = 0.007Thus:
growth rate = a * N * (K - N) / Kgrowth rate = 0.007 * 450 * (1000 - 450) / 1000growth rate ≈ 1Therefore, the overall growth rate of this population is approximately 1 individual per year.
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PLEASE HELP I NEED IT RNNNN ILL MAKE YOU BRAINLIEST
DNA replication begins when the two parent strands ______ aided by _____ which assist in breaking the hydrogen bonds between the bases. After the strands split, the bases of each strand joins with the other bases following the complimentary base pairing.
DNA replication begins when the two parent strands separate, aided by enzyme helicases which assist in breaking the hydrogen bonds between the bases.
DNA replication is the process by which DNA is copied during cell division. It is a crucial process that ensures the accurate transmission of genetic information from parent cells to daughter cells. The process of DNA replication is initiated at specific sites on the DNA molecule called the origins of replication.
Once the helicase enzymes have separated the strands of DNA, another enzyme called single-strand binding proteins stabilizes the separated strands to prevent them from reannealing. DNA polymerase then adds new nucleotides to each of the separated strands, following the rules of base pairing, until two complete copies of the original DNA molecule have been formed.
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Climate change has lectins change in the abiotic factors of ecosystems, decreasing its biodiversity. Which two outcomes are likely consequences of this event
Climate change impacts the abiotic factors of the ecosystem, that causes loss of habitat and decrease in population of species.
Climate change has adverse effects on both abiotic as well as biotic factors. The effect on one part of the ecosystem has consequences on the other part as well.
Increase in temperature will cause a misbalance in the ecosystem. It will impact the animals that are not accustomed to temperature fluctuations. It can even cause withering of plants. Many species of plants and animals will not be able to survive, thus causing decrease in population.
Decrease in water levels due to drying of water bodies for instance, will lead to stress in the marine ecosystem and there would be a competition amongst the species for survival. This will lead to decrease in their number.
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ASAP PLS HELP!!! WILL MARK AS BRAINLIEST + 50 points!
I need this chart filled out, attached the chart and my species i created.
PLS PLS PLS HELP!!! ASAP
The three traits and the possible phenotypes are:
eye color; blue, brownhair color; blonde, red, blackheight; tall, average, shortWhat are traits and phenotypes?An observable characteristic is simply referred to as a phenotype.
The term "pheno" and "phenomenon" share a common root, and "pheno" simply means "observe".
It can therefore refer to anything from a common trait like height or hair color, to the presence or absence of a disease. It is also an observable type of an organism.
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