Explanation:
Acceleration of an object is defined as the rate of change of velocity. The acceleration of an object is a vector quantity. It is caused whenever there is change in speed and the change in direction of motion of an object.
Option (1) : On a flat road, there is no chance for the change in speed or the change in direction of an object until the driver wants. As a result, on a flat road no acceleration is caused.
Option (2) and (3) : In case of Wind and water movement, it can change the speed of an object. As a result, vehicle will accelerate.
Option (4) : As the hill have curved roads, the direction of a vehicle changes. As a result, acceleration is caused.
Option (5) : A stop light, A stop light consists of three lights i.e. red light, green light and yellow light. As a light turns to red, the vehicle will decelerate and as it turns green, the driver will accelerate the vehicle.
Hence, Wind, water movement, a hill and a stop light can cause acceleration.
Air pressure is _____.
Answer:
Air pressure is the weight of air molecules.
Explanation:
Air pressure can be described as the force generated by the weight of air on the surface of the Earth. The size and number of the air molecules determine the air pressure.
When the number of molecules in the air increases, it generates more force on the Earth's surface and we say that it is regarded as a rise in the atmospheric pressure. A mercury barometer is a device which is used to measure the air pressure.
Search the Internet for ongoing research projects about food safety and sanitation. Consult governmental or education sites for projects, such as fsrio.nal.usda.gov, or use the organizations and links provided in Additional Resources at the beginning of this lesson.
Find at least two research projects and summarize them. What are the research questions? Why is this research important?
In a 500-word document, summarize new findings or recent research related to food safety and sanitation. Be sure to include all source information: article titles, authors, institutions (i.e. government or educational) and dates.
Final answer:
Current research in food safety and sanitation includes studies on temperature's effect on bacterial growth and the efficacy of innovative sanitation techniques. These studies are crucial for enhancing food management and reducing the prevalence of foodborne illnesses.
Explanation:
The student seeks to learn about ongoing research projects on food safety and sanitation. Two examples of such research include a study on the impact of temperature on the growth of bacteria in food, and another exploring innovative sanitizing techniques to prevent foodborne illnesses. In the first project, researchers might ask how varying refrigeration temperatures affect bacterial growth in perishable foods. The second project could investigate whether ultraviolet light or other non-traditional methods are effective at reducing pathogens on food surfaces. Understanding these processes is vital because it helps improve food management practices both commercially and domestically, potentially reducing the incidence of foodborne diseases.
Implementing food safety practices, such as proper hand washing, cooking at recommended temperatures, and avoiding cross-contamination, are essential for preventing foodborne diseases at home. Comprehensive research in food safety underpins these recommendations, providing evidence-based guidelines for the public and the food industry to follow. By exploring new and improved ways to maintain food safety, researchers contribute to the health and well-being of society, influencing policies and individual behaviors that support a safer food supply chain.
Reflecting on these findings illustrates the importance of scientific inquiries in shaping practical safety measures. Further research might delve into alternative preserving methods or the effectiveness of food safety education programs among different demographics. The student may then discuss the implications of these findings for everyday food handling and policy making, shaping a well-informed thesis on food safety strategies.
A teacher modeled part of a DNA molecule using two of these coiled springs. Which part of the DNA molecule was the teacher most likely modeling?
Answer:
The double helix shaped sugar phosphate backbone
18. What's a ventifact?
A. A wind-borne deposit of sand
B . The side of a sand dune protectechirom wind
C. A wind-borne deposit of nutrient-rich soil
D. A rock formation shaped naturally by wind
your answer would be D
the answer is d. it's a stone shaped by the erosive action of windblown sand.
What is kudzu? Plz help
Answer: D. an invasive, fast-growing vine native to Japan
Explanation:
Kudzu is the invasive vine native of Japan. It is fast growing in nature. It reproduce and spread by the mode of asexual reproduction. Also conduct the sexual mode or reproduction in which the pollination is entirely dependent upon the pollinators. In Japan Kudzu thrives in mountainous regions.
It was introduced to United States. In US it is used as a livestock feed, erosion control and fertilizer.
What part of the cell does 9 represent?
A. Cytoplasm
B. Lysosome
C. Ribosome
D. Centrosome
Answer:
Lysosome
Explanation:
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Which type of mutation occurs in reproductive cells and can be passed to offspring?
somatic mutation
germline mutation
point mutation
frameshift mutation
Answer:
germline mutation
Explanation:
It is germ line mutation which can be passed on from one generation to another that means from parents to off springs. The term germ relates to the one which is capable of germination i.e. reproduction.
There are two types of cells in our body (1) somatic cells (2) germ cells.
Germ cells are the cells which are produced in the primary sex organs like gonads. Since gonads are responsible for producing gametes (ovum and sperms) which are capable of reproducing an entire organism after fertilization, they are regarded as germ cells. Somatic cells on the other hand are not responsible for fertilization. So, if a mutation occurs in germ cells which is known as germline mutation, it will pass on to the off spring while a mutation in somatic cells will be restricted to the individual without being passed on to the next generation.
How does natural selection affect undesirable traits?
A.
It increases them.
B.
It has no effect.
C.
It eliminates them.
D.
It decreases them.
Answer:
the answer is c
Explanation:
seed plants that lived during the carbon fires impact life on earth today because
The seed plants are survivors.
what do cellular respiration and fermentation have in common
Some technologies have a number of negative effects. Which is a negative outcome of the technology of pesticides?
A. Increased food supply
B. Cheaper food
C. Creation of more jobs
D. Harmful to humans if used improperly
Answer: Option D.
Explanation:
Pesticides are the chemical substances which are use to to control pests in agriculture.
Overuse of Pesticides is a raising concern for human health. Pesticides contains several lethal or toxic chemicals which are more heat stable and water soluble. Exposure to pesticide can cause several health issues such as neurological health effects, cancer and reduces efficiency of immune system.
Hence, the correct option is D.
The earth's four main spheres continuously interact to support life and balance Earth's materials. When plants absorb carbon dioxide for photosynthesis, it is an example of _____ and _____ sphere interaction. biosphere, lithosphere biosphere, atmosphere hydrosphere, lithosphere cryosphere, lithosphere
Answer:
Bioshpere and atmosphere interaction.
Explanation:
Plants are living organisms that are part of the biosphere. These plants obtain their carbon from the atmosphere, absorbed through the leaves. The carbon that they absorbed is used to produce their food through the process called photosynthesis, which also needs water and sunlight for it to occur.
Although plants are rooted on the ground, it is still part of the biosphere because the biosphere encompasses all living things.
Which statements about mutations are true? Check all that apply
Answer:
A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people. Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes.
Explanation:
Answer:mutations are rare
most forms of cancer are caused by somatic mutations
Explanation:
Question 17 (1 point)
Where does penicillin come from?
A. it is a chemical that man invented
B. it is a fungus
C. it is a toxin made by other bacteria
D. it was discovered in archaebacteria
how does ground water become polluted ?
a. pollutants mixed with water pass through permeable layers above the aquifer.
b. factories dump their waste directly into aquifers.
c. refuse infiltrates the water table when garbage is dumped.
d. all of the above.
Answer:
A
Explanation:
Just took my test
Groundwater becomes polluted when pollutants mixed with water pass through permeable layers above the aquifer..
What is groundwater?Groundwater refers to the water that exists beneath the earth's surface in underground streams and aquifers.
Water pollution, on the other hand, is the release of toxic substances called pollutants into water via natural or anthropogenic sources.
Therefore, it can be said that groundwater becomes polluted when pollutants mixed with water pass through permeable layers above the aquifer.
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Internal gestation followed by live birth is an evolutionary development most likely driven by which of the following? A. The inability of eggs to acquire nutrients to grow complex animals B. The need to give birth and reproduce on dry land where eggs could dry out C. The threat of predators to eat eggs D. Environmental conditions caused eggs to over-absorb dangerous molecules from the environment
Internal gestation likely evolved primarily to prevent dehydration of eggs on land, with added benefits of reducing predation and ensuring higher offspring survival rates.
Internal gestation followed by live birth is an evolutionary development most likely driven by the need to give birth and reproduce on dry land where eggs could dry out. This is because internal fertilization and gestation protect the fertilized egg from dehydration, which is a significant risk for eggs laid on land. Furthermore, internal fertilization isolates the embryo within the female, greatly limiting predation on the young, and enhances the likelihood of fertilization of eggs by a specific male. Although it results in fewer offspring compared to external fertilization, the offspring produced through internal fertilization have higher survival rates due to these protective measures.
While the threat of predators consuming eggs and environmental hazards are also valid concerns, the desiccation risk on land is a critical selective pressure. For instance, while reptile and bird eggs have protective coverings, such as leathery shells or hard calcium coverings, the evolutionary move to internal gestation enables further protection and higher developmental success in terrestrial environments.
How do cranial nerves transmit information to the senses?
Answer:
it transmits threw the neurons
Which of the following happened during the Precambrian Era?
the first prokaryotic cells
the first eukaryotic cells
development of photosynthesis
all of the above
D. All of the above
Explanation:Precambrian time incorporates Earth's history from birth up to 590 million years back. That is, the Precambrian traverses 90% of Earth's presence. Fossilized microscopic organisms and blue-green growth demonstrate that crude life existed in any event 3,500 million years prior, and potentially prior.
However, it took another 2,100 million years for eukaryotic cells (plant and creature cells) to show up. These single-celled animals (protozoa) commanded the seas. Multi-cell creatures (spineless creatures) didn't advance until exceptionally late in Precambrian time, around 700 million years prior or 2,800 million years after life initially started on Earth.
The Precambrian Era saw the emergence of the first prokaryotic cells and eukaryotic cells, as well as the development of photosynthesis. Hence, 'all of the above' occurred during this period.
Explanation:The Precambrian Era led to significant milestones in the biological history of life on Earth including the appearance of the first prokaryotic cells, the first eukaryotic cells, and the development of photosynthesis.
The Precambrian Era was a time when the Earth was being shaped by volcanic activities and cooling effects, which led to the formation of simple life forms. First prokaryotic cells emerged, which are simple, single-celled organisms that lack nuclei and distinct organelles. Later, more complex eukaryotic cells developed, which have a true nucleus and various organelles. Additionally, during this era, living organisms developed the ability to undergo photosynthesis, which is the process where green plants and a few organisms convert light energy, usually from the sun, into chemical energy.
Therefore, the answer to your question, 'Which of the following happened during the Precambrian Era?' is all of the above.
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Which process helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II?
Answer:
Crossing over is the process in which the homologus chromosomes exchange their chromatids and exchange the genetic material and produce variation
it is the process that make meiotic cells genetically different and occurs during prophase I, but not during prophase II
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Explanation:
Answer:
The correct answer is crossing over.
Explanation:
Crossing over maintains genetic diversity within a population of an organism, allows the various genetic combination to be transferred from parents to their offspring.
Crossing over of chromatids pair occurs during prophase-I, it is the very first phase of meiosis-1. In this phase, the 3rd stage is pachytene in which genetic recombination occurs because of the formation of recombinant nodules.
The first phase of meiosis II is prophase II in which the nuclear envelope breaks and the formation of the spindle apparatus occurs.
Thus, the correct answer is crossing over.
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Which condition causes changes in air pressure in the atmosphere?
building clouds
rapid air movement
condensation of water vapor
uneven heating of Earth’s surface
Answer:
Uneven heating
Explanation:
Uneven heating I believe because change in pressure is caused by changes in air density, and air density is related to temperature. warm air is less dense than cooler air
Answer:
Unevening heating of Earth's surface
Explanation:
since the Earth is made by land and water it absorbs the sunlight of the sun at different high levels. Pressure,wind includes that as well.
Which is true about glycolysis? (Select all that apply.)
A. It converts glucose into pyruvate.
B. It produces a large amount of ATP.
C. It occurs in the cytoplasm of the cell.
D. It produces NADH.
Answer:
your answer is A. it converts glucose into pyruvate
Explanation:
because this called glycolysis
Answer:
A. It converts glucose into pyruvate.
C. It occurs in the cytoplasm of the cell.
Explanation:
Glycolysis is a process that can be defined as a metabolic pathway in which one molecule of glucose is broken down into two molecules of pyruvic acid. It occurs in the cytoplasm of the cell of any living being, be it anaerobic or aerobic. The process is not seen only in viruses.
Glycolysis is a process that involves ten enzymatic reactions and results in the formation of pyruvic acid from glucose. For the process to occur, it is necessary that the glucose molecule is initially activated by the addition of phosphates, which come from two molecules of ATP. Despite the use of ATP, the process of glycolysis is advantageous, since a total of four molecules of ATP are produced at the end of the reactions. Therefore, the net balance of glycolysis is 2 ATPs.
The B horizon is also called the _____.
subsoil
unaltered parent material
partially altered parent material
topsoil
Answer:
subsoil
Explanation:
THe B horizon is what we call the layer of soild that is directly after the A-horizon, or normal soil when we dig up, the B horizon is also called the sub soil, which comes from the root sub- which means directly below, in its name expresses the reality of its meaning whihc is the soil that is directly below the surface soil.
Top 3 ideas for maintaining soils and supporting biodiversity.
Answer:
Crop rotation, intercropping, adding manures and composts to the soil.
Explanation: yesquad
Implementing agroforestry practices, reducing tillage and supporting the use of organic fertilizers.
What are the ways to maintain soil and biodiversity?Adopting regenerative agriculture practices: Regenerative agriculture practices such as cover cropping, crop rotation, and reducing tillage can help maintain soil health and support biodiversity. These practices promote the growth of soil microorganisms, which are essential for plant growth and nutrient uptake, while also preventing soil erosion and reducing the use of synthetic fertilizers and pesticides.
Planting diverse crops and creating habitats: Planting diverse crops such as companion plants and incorporating wildflower strips or hedgerows can support biodiversity by creating habitats for pollinators and other beneficial insects. Creating habitats can also help to prevent soil erosion and improve soil structure by promoting the growth of deep-rooted plants.
Composting and reducing waste: Composting food and yard waste can help to maintain soil health by adding organic matter to the soil, improving soil structure, and increasing nutrient availability for plants. Composting can also reduce the amount of waste sent to landfills, which can contribute to greenhouse gas emissions and other environmental issues. By reducing waste and composting, we can support biodiversity by reducing the impact of human activity on the environment.
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What will occur when the carrying capacity for humans is met?
A. Diseases will increase.
B. Natural disasters will increase.
C. The death rate will decrease.
D. The population will increase.
Answer:
A
Explanation:
Answer: A. Diseases will increase.
Explanation:
The carrying capacity can be define as the maximum number of the population of species that an ecosystem can support in terms of availability of resources. When the population of the species exceeds the carrying capacity, the population of the species starts declining.
When the human population met the carrying capacity, the diseases will increase as the transfer of pathogen will become easy and the resources to cure the population will be limited.
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the following diagram shows the branching tree diagram for some animals.
Which two organisms share the greatest number of derived characteristics? (5 points)
Frog and kangaroo
Kangaroo and chimpanzee
Lion and chimpanzee
Shark and chimpanzee
Answer:
lion and chimpanzee
Explanation:
lion and chimpanzee
share the greatest of derive characteristics
Answer: Shark and Chimpanzze
Explanation: They share the least amount of characteristics.
What is the final product of DNA transcription?
A. A chain of amino acids
B. Two copies of a DNA molecule
C. Single strands of DNA
D. Complementary strands of mRNA
D. Complementary strands of mRNA
In transcription, RNA is made from RNA.
The final product of DNA transcription is complementary strands of mRNA.
What do you mean by transcription?Transcription is the process of copying a segment of DNA into RNA. The segments of DNA transcribed into RNA molecules that can encode proteins are said to produce messenger RNA. Other segments of DNA are copied into RNA molecules called non-coding RNAs.
During transcription, a piece of DNA that codes for a specific gene is copied into messenger RNA (mRNA) in the nucleus of the cell. The mRNA then carries the genetic information from the DNA to the cytoplasm, where translation occurs.
The purpose of transcription is to make RNA copies of individual genes that the cell can use in the biochemistry. The purpose of translation is to synthesize proteins, which are used for millions of cellular functions.
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What would most likely happen if a person increased the amount of saturated fat in his or her diet
Final answer:
Increasing the amount of saturated fat in the diet can lead to an increased risk of cardiovascular disease, while a diet high in unsaturated fats can reduce this risk.
Explanation:
A person who increases the amount of saturated fat in their diet is likely to experience negative health effects, particularly an increased risk of cardiovascular disease. Saturated fats are found in foods such as butter, cheese, lard, and fatty meats. Consuming these foods in excess can lead to unhealthy weight gain and elevated lipid levels in the blood, which can contribute to the development of heart disease.
On the other hand, a diet high in unsaturated fats, particularly omega-3 fatty acids found in cold-water fish like salmon, is believed to reduce the risk of heart disease. Therefore, it is important to balance the consumption of saturated fats with healthier dietary choices to maintain good cardiovascular health.
Which represents a negative impact of technology?
O
A. Increased recycling
O
B. Renewable energy sources
O
C. Higher food production
O
D. Climate change
Answer:
D
Explanation:
All of the other examples are positive
The negative impact of technology is climate change. The correct option is D.
What is technology?Technology is the application of scientific knowledge to the practical goals of human life, or, as it is sometimes referred to, to the modification and manipulation of the human environment.
There can be many negative impact of technology, some are:
Psychological and physical issues.Difficulty focusing on important tasks.Depression.Climate change.Thus, the correct option is D.
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Which chamber of the heart pumps deoxygenated blood to the lungs?
A.
right ventricle
B.
left ventricle
C.
right atrium
D.
left atrium
Answer:
The correct answer would be option A.
Explanation:
The blood returned to the heart in the right atrium from different parts of the body is deoxygenated, which is transferred to the right ventricle to be pumped to the lungs by the pulmonary artery for removal of the carbon dioxide and oxygenate again the blood.
The right ventricle chamber of the heart pumps back blood to the lungs to take up oxygen. The left part of the heart gets the oxygen rich blood from the lungs and pumps it to all parts of the body.
Thus, the correct answer would be option A.
Which substance is a product of glycolysis?
A. Water
B. NADPH
C. ATP
D. Oxygen
Answer:
I believe it's B.
Explanation:
Hope my answer has helped you!