Scientists develop a good experimental design that contains both a(n) experimental group in which the experimental variable is altered, and control group in which the experimental variable is not altered.
The scientific approach starts with the observation of natural occurrences or happenings. Inductive reasoning is used by scientists to incorporate separate information into a model probable explanation, or hypothesis.
The experimental group represents the effect of the variable in question. For example, to assess the efficacy of a new immunization, 50 volunteers are recruited and divided into two groups. One group will act as the control group, and the other as the experimental group.
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Why is it hard to find animals in tropical areas?
Answer:
Tropical areas are warm and wet causing for animals to want to hide essentially. Also there is a lot of cover for animals to hide in. Usually in tropical areas there are a lot of predators also, another reason for animals to hide.
In New York State, the risk of sunburn is greatest between 11 a.m. and 3 p.m. on summer days because
A the air temperature is hot
B) the angle of insolation (incoming solar radiation) is high
earths surface reflects most of the sunlight
the sun is closest to earth
Answer: B) the angle of insolation is high
Explanation:
During that time the Earth is facing the sun at a closer angle. So the chances of incoming solar radiation will be higher.
In New York State, the risk of sunburn is greatest between 11 a.m. and 3 p.m. on summer days because the angle of insolation (incoming solar radiation) is high. The correct answer is option B.
What is the duration of sunlight reaching the Earth ?The duration of sunlight reaching the Earth is approximately 9 seconds.
Angle of insolation is defined at the angle at which the sun's rays strike a particular surface on Earth in order to receive the sun rays and get the heat out from the sun.
At the angle of 90 degrees it is directly receiving the light from sun at equator and the solar radiations are all gathered at one particular surface thus making the surface a little hot.
The sun strikes at 23 approximately at the tropic of cancer thus this will receive the maximum of heat from sun.
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The pancreatic fluid accumulates in sac like pouches called pancreatic acini and eventually flow out the ___________________ duct which carries these secretions to the ___________________
The pancreatic fluid is stored in small, sac-like structures known as pancreatic acini. These secretions then travel along the duodenum duct to the pancreatic duct, where they are released.
The pancreatic duct and duodenum are two essential components of the digestive system. The pancreatic duct carries secretions from the pancreas to the duodenum, which is the first part of the small intestine. The secretions of the pancreas, including digestive enzymes and bicarbonate, are produced in the pancreatic acini and then travel through the ducts to the duodenum.
The duodenum acts as a buffer, allowing the secretions to mix and interact with the other digestive enzymes and bile from the liver, before entering the small intestine. The pancreatic duct and duodenum work together to ensure that the body can properly process and absorb nutrients from the foods we consume.
The pancreatic fluid is essential for proper digestion and absorption of nutrients, as it helps to break down complex molecules in the food we eat. Without the pancreatic duct and duodenum, the body would not be able to process and absorb the necessary nutrients.
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so i kinda need help with this problem, can someone help?
This is what I think maybe this can help you
Explain why the sickle-cell gene does not benefit anyone in the United States, but it may be very advantageous to someone living in rural Zambia, Africa.
The sickle-cell gene does not benefit anyone in the United States, but it may be very advantageous to someone living in rural Zambia, Africa because Malaria is rare in the United States
Sickle cell disease: A group of disorders in which
red blood cells deform and collapse. In sickle cell disease, a group of inherited disorders, red blood cells twist and sickle. Cells die prematurely, lacking healthy red blood cells (sickle cell anemia) and can block blood flow and cause pain (sickle cell disease).
In parts of Africa where malaria is common, the sickle cell disease mutation confers a health benefit to carriers (protection from malaria). HbS carriers were naturally selected in these regions because their traits confer some resistance to malaria. Red blood cells with abnormal hemoglobin tend to sickle when infected with the malaria parasite.
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Gastric emptying is Question 3 options: affected greatly by the volume of fluid ingested. generally enhanced by fluids with a higher osmolality. adversely affected by fluids with less than an 8 percent concentration of carbohydrates.
Gastric emptying is affected greatly by the volume of fluid ingested. The correct option is Option A.
Gastric emptying is a test that helps to measure the time it takes the food to empty the stomach and small intestine. This test is often done to find out the reason for vomiting, having stomach pain or not gaining weight.Normally it takes 1.5 -2 hours for the food to move out of the stomach and into the small intestine.
But when the stomach takes longer than normal to empty it is called gastroparesis.
But a condition in which food , especially food with high sugar content , moves from the stomach into the small intestine too quickly after you eat, then this condition is called Dumping syndrome. It occurs mainly as a result of surgery on our stomach or esophagus.
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please help as soon as possible
Explanation:
Adenine pair with thymine, and cytosine pair with guanine. That's all I know
Suggest two reasons why healthy volunteers are used in Phase 1 clinical trials
Answer:
Healthy volunteers in phase 1 clinical trials are used for the development of safe drugs and other biologics by accepting the possibility of risks from study participation without anticipated health benefits from the investigational products. The incidence of serious adverse events is low.
PLEASE HELP!! WILL GIVE BRAIN SHOW WORK
Answer:
3
Explanation:
Both parents are Pp, using a punnet square will shop that the top left would be PP, the top right is Pp, the bottom left is Pp and the bottom right would be pp.
Muddy shores tend to have lower biodiversity than rocky shores. Explain why habitats with low biodiversity tend to contain wide ecological niches
Habitats with low biodiversity tend to contain wide ecological niches because they are characterized by limited resources and a lack of species diversity.
When resources are limited, the competition for those resources is high, meaning that the few species that do exist must compete for the same resources. This competition can result in the emergence of an ecological niche, where a single species can monopolize a resource due to its unique adaptations that allow it to successfully exploit the available resources.
Muddy shores, which are made up of sedimentary deposits, are often characterized by limited resources and a lack of species diversity. These shallow habitats tend to be low in oxygen, making it difficult for many species to survive. Additionally, the sedimentary deposits can be unstable, making it difficult for species to establish themselves in the habitat. As a result, muddy shores tend to have fewer species present, resulting in a wide ecological niche.
Wide ecological niches can also be caused by the presence of physical barriers or abiotic factors such as temperature and salinity. For example, muddy shores tend to have higher temperatures than rocky shores due to their shallow depths. This higher temperature can limit the types of species that can survive in the habitat, resulting in fewer species and a wide ecological niche. Additionally, the muddy sediment can have a high level of salinity, which can also limit the types of species that can survive.
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The diagram below shows the ways cells can release energy from food depending on if
oxygen is available.
Using the diagram below, respond to the following:
**Reference that Photosynthesis Summary sheet we first saw in lesson #1 to help
you with this!!
1. Which step(s) takes place if oxygen is available?
2. Which step(s) take place if oxygen is not available?
3. Do we make more ATP when the process is aerobic or anaerobic?
4. Which specific step of aerobic cellular respiration makes the most ATP?
Answer using complete sentences.
Glycolysis
Overview of Cellular Respiration
C6H12O6 +6026CO₂ + 6H₂O + ATP
Oxygen present
Oxygen not present
Krebs cycle
Electron transport chain
Lactic acid fermentation
Alcohol fermentation
1
+10
When oxygen is available, the Krebs cycle will run, and in the absence of oxygen, fermentation will run, and the most ATP will form in the ETC, and the majority of the ATP is derived from aerobic respiration.
What is the role of aerobic respiration?The role of aerobic respiration is to produce most of the ATPs by using oxygen, and then, in the electron transport chain, the maximum amount of ATP is generated, whereas fermentation happens in less oxygenic conditions.
Hence, when oxygen is available, the Krebs cycle will run, and in the absence of oxygen, fermentation will run, and the most ATP will form in the ETC, and the majority of the ATP is derived from aerobic respiration.
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Hannah is boiling water in a glass tea kettle. She notices bubbles forming on the bottom of the kettle that rise to the top and wonders what is in the bubbles.
She asks her family what they think and this is what they say:
• Dad: They are bubbles of heat
• Calvin: The bubbles are filled with air
• Grandma: The bubbles are an invisible form of water
• Mom: They are empty
• Lucy: The bubbles contain Oxygen and Hydrogen that separated from the water
Which person do you most agree with and why?
Answer in full and complete sentences.
Answer: Lucy
Explanation:
I’m a physical science major
The bubbles are an invisible form of water called water vapour. So the person to agree with is Grandma.
What is boiling of water?The boiling of a liquid is defined as the increase in the vapour pressure of a liquid to a value higher than or equal to the value of the atmospheric pressure.
The temperature at which the vapour pressure of a liquid exceeds or becomes equal to the value of atmospheric pressure is called the boiling point of a liquid.
The boiling point of water at a pressure of 2 atm is equal to hundred degrees Celsius. Thus, the boiling of a liquid is a function of temperature, vapour pressure and atmospheric pressure.
When the process of boiling begins, the energetic molecules start to get converted to gas. This results in them spreading out and leads to the formation of bubbles. Thus, when water is boiling, the water starts to get converted to vapour.
Therefore, the bubbles in the water during boiling are an invisible form of water called water vapour.
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What is natural gas and how does natural gas work?
Answer:
A molecule of natural gas is made up of carbon and hydrogen. When the hydrogen is segregated from the carbon and filled into a fuel cell, it fuses with oxygen to produce water, electricity, and heat. The carbon is released as carbon dioxide in smaller quantities than from gas turbines
Explanation:
What can the location of a fossil in a rock layer tell scientists about the organism?
a. how long ago the organism lived.
b. that the organism is now extinct.
c. how many offspring the organism had
d. the exact age of the fossil
Answer:
I think that answer is A
Explanation:
how long ago did the organism lived
Unikonta is a supergroup that includes all of the following except _____.
A) fungi
B) protists
C) animals
D) plants
Numerous protists are included in the supergroup unikonta together with mammals and fungi. Amoebas make up a large portion of Unikont protists.
Which of the following categories of eukaryotes is not one of the four?Organisms called eukaryotes have nuclei and cell organelles that are both membrane-bound. Eukaryotes make up every kingdom except from Kingdom Monera.
What are the four protist supergroups?The largest eukaryotic subcategories, known as eukaryotic supergroups, have been identified. The eukaryotes can be split into four groups since there are currently four of them. The archaeplastida, SAR, excavata, and unikonts, also known as Amorphea, are described here.
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Why did Mendel carry out an experiment to study inheritance of two traits in garden pea?
Mendel conducted research on inheritance using peas. Peas were selected because they had previously been used in research that was comparable, because they are simple to cultivate, and because they can be replanted annually.
Pea flowers typically self-pollinate because they contain both male and female parts, which are referred to respectively as stamen and stigma. Because of the process of self-pollination, offspring can be produced from a single plant even though the flowers do not open until later. Peas can also be manually cross-pollinated.
To do this, simply open the pea flower buds, remove the pollen-producing stamen, and then apply pollen from one plant to the stigma of another plant. This will prevent the peas from pollinating themselves.
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Zebras are herbivores and love to eat the tough grass of the serengeti. Lions hunt
zerbas and other herbivores.
A. Commensalism
B. Competition
C. Mutualism
D. Parasitism
E. Predation
Answer:
E. Predation
Can I please get this to be a brainliest answer :)
Plzzz!!!!
Answer:
Predation
Explanation:
Help me get the brainliest answer pls ^^
Doubling the chromosomes of a sterile species hybrid with colchicine or cold shock is a method used to produce a fertile species hybrid called a ________.
Doubling the chromosomes of a sterile species hybrid with colchicine or cold shock is a method used to produce a fertile species hybrid called a amphidiploid .
Another type of aneuploidy is monosomy, or the loss of one chromosome in cells. "Mono-" is Greek for "one," therefore patients with monosomy have one copy of a certain chromosome in their cells rather than the customary two copies.
Turner syndrome (also known as monosomy X) is a monosomy-related disorder.
The embryo's tissues will contain higher-than-normal quantities of the Gene P protein product.
Triploidy is the presence of an extra pair of chromosomes in the cell, resulting in a total of 69 chromosomes rather than the standard 46 chromosomes per cell. During fertilization, the additional pair of chromosomes is derived from either the father or the mother.
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Using the theory of natural selection, what is antibiotic resistance
Answer:
Antibiotic resistance is when pathogens such as bacteria or fungi develop a resistance to antibiotics. This happens when some pathogens die, and others survive. The small number of pathogens that had a resistance to the antibiotic will reproduce more offspring that are also resistant to, and those offspring will reproduce even more offspring and so on. Eventually most pathogens will be resistant to the antibiotic, so antibiotics won't work.
Which level contains organisms that carry out autotrophic nutrition
Answer:
Level A, though some people call it different things.
Explanation:
The answer will be the lowest number/letter, as they are at the bottom of the food chain.
3. What is a function that epithelial cells?
A.Contract to shorten the cells
B. Protect surfaces
C. Defend the body against pathogens
D. Store energy the body needs
Answer: B (Protect surfaces)
Explanation:
Epithelial tissues are widespread throughout the body. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands. They perform a variety of functions that include protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception.
Hope This Helps!
Which statement does not accurately describe what occurs during the process of meiosis?
A) Meiosis produces four identical gametes, either egg or sperm.
B) Genetic variation among sexually reproducing organisms is enhanced by meiosis.
C) Meiosis produces gametes with the haploid chromosome number.
D) All stages of meiosis follow DNA replication
Answer:
D cause not all stages of meiosis follow DNA replication.
How can the photoelectric effect be explained based on the wave theory of light?
A.
When light waves hit a metal, the trough of a wave can kick out an electron.
B.
Light waves can pile up to exert pressure on an electron, eventually ejecting it.
C.
Through superposition, many light waves can impact an electron from different angles.
D.
The photoelectric effect cannot be explained by the wave theory of light.
8. What happens to the sister chromatids in meiosis II?
A. They duplicate.
B. They are divided.
C. They do not take part.
D. They remain together.
Answer:
I think B. They are divided.
please label the diagram
Paleontologists are still debating about whether modern behavior, language, and art appeared more recently in Europe, about 50,000 years ago or further back, based on findings such as the tools and artifacts found at the Blombos cave. What do you think
Paleontologists have been debating the origins of modern behavior, language, and art for decades. This debate has recently been reignited by the discovery of tools and artifacts at the Blombos Cave in South Africa.
The artifacts found at Blombos suggest that modern behavior, language, and art appeared in Europe approximately 50,000 years ago. However, some paleontologists argue that these behaviors are likely to have appeared much earlier.
I believe that modern behavior, language, and art were likely present in Europe long before 50,000 years ago. Looking at the archaeological record, it is clear that behavior, language, and art have been evolving since the time of our early ancestor Homo erectus. Furthermore, the tools and artifacts found at Blombos are similar to those found in other parts of the world, suggesting that these behaviors were not isolated to Europe.
In addition to the archaeological evidence, there is also genetic evidence that suggests modern behavior, language, and art existed in Europe before 50,000 years ago. Genetic studies of modern humans suggest that all modern populations share a common ancestor who lived approximately 150,000 years ago. This suggests that modern behaviors, language, and art were likely present in Europe at least 100,000 years ago.
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Which of the following would decrease with the manufacture, application, and use of synthetic fertilizers rather than organic fertilizers?
answer choices
Recycling of organic matter
Groundwater pollution
Cultural eutrophication
Use of fossil fuels
Recycling of organic matter would decrease with the manufacture, application, and use of synthetic fertilizers rather than organic fertilizers.
A fertilizer is any chemical, whether natural or manufactured, that is added to soil or plant tissues to supply plant nutrients. Fertilizers can be differentiated from liming agents and other non-nutrient soil additives. Fertilizer can be found in a wide variety of natural and artificial sources. Fertilization for the majority of modern agricultural practices focuses on the three main macronutrients of nitrogen (N), phosphorus (P), and potassium, with the occasional introduction of supplements like rock flour for micronutrients (K). These fertilizers can be applied by farmers using a variety of techniques, including as manual or heavy machinery, dry, pelletized, or liquid application processes.
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What is another way to say “micro livestock farming”?
( no links pls)
PLEASE ANSWER QUICK Have you heard the terms structure and function used before? Using what you already know, identify two structures in your classroom and state their function
Yes, I have heard the terms structure and function used before. The two structures I identified in my classroom were:
Desk - The desk provides a stable, elevated surface for students to use for writing and studying.Chalkboard - The chalkboard provides a surface for teachers to write notes, instructions, and reminders.The Importance of Structures in the ClassroomIn the modern classroom, structures are essential for an effective learning environment. Structures provide the necessary framework for students to work and learn, while also providing teachers the necessary tools to facilitate learning. Without the right structures in place, learning quickly becomes difficult and inefficient.
Desks are some of the most crucial structures in a classroom. A student's desk provides them with a stable, elevated surface to write and study on. Having a desk allows students to spread out their materials and have easy access to them whenever they need them. It also gives them a designated workspace to stay focused and organized.
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Please Help Me Out❗️❗️
Answer:
B
Explanation:
Enzymes work to speed up chemical reactions by changing what goes into the reactions into different molecules. To do so, these enzymes bind with the substrates, making the physical form very important. The lock and key method explains that enzymes and their corresponding substrates are shaped very specifically to be able to fit into one another to undergo this change. Hope this helps