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In 1987 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi (pronounced berry-berry). Those who fell ill could not eat and became paralyzed and could not move. Scientists believed the disease may have been caused by bacteria in the blood.
The scientists used “infected” blood as the variable in their experiment. In the manipulated group they injected chickens with blood from beriberi patients. In the control group they did not inject chickens with blood from beriberi patients. The injected chickens became sick. However, so did the group of chickens that were not injected with the blood from beriberi patients. The scientists were confused by these results.
One of the scientists, Dr. Christiaan Eijkman (pronounced Ick–man), noticed something about the experiment. Normally all the chickens eat whole-grain rice, but during the experiment, the chickens ate white rice. Whole-grain rice or brown rice is covered with a seed coat. The seed coat contains a vitamin called thiamine. All of the chickens in the experiment ate white rice which does not have the seed coat. Dr. Eijkman researched this interesting case further. He found that white rice lacked thiamine (pronounced thigh–a-mean), a vitamin necessary for good health, which is also linked to beriberi.
question:. If you were Dr. Eijkman, how could you test your hypothesis?
A nurse is caring for a child with tinea pedis. which assessment finding should the nurse expect
What distinguishes the sciences from other ways (methods) of understanding the world?
How does continental drift affect living organisms? check all that apply?
Why are cohesion and adhesion important to life?
Cohesion and adhesion are vital to life processes, contributing to water transportation in plants and blood movement in animals. Water molecules adhere to one another in a process known as cohesion, whereas they adhere to other substances in a process known as adhesion. Without them, critical life processes would fail to occur.
Explanation:Cohesion and adhesion are two critical properties of water that play a significant role in life processes. Cohesion refers to the ability of water molecules to stick together, due to their polarity, resulting in phenomena like surface tension. It's vital for the transportation of water in plants where water molecules 'stick' together to form a continuous stream from roots to leaves.
Adhesion, on the other hand, is the ability of water molecules to stick to other substances. It's helpful in various biological processes, like capillary action, where water can move up narrow tubes against the force of gravity. This is crucial for things like blood movement in tiny blood vessels in animals and water movement in plant roots.
Without these two properties, essential life processes might not be able to occur, thus making cohesion and adhesion very important to life.
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Scientists review the work of other scientists to
Select one:
a. ensure the results are in agreement with accepted scientific beliefs
b. guarantee federal funding by supporting each other's work
c. keep the science community better informed
d. validate the results and check the evidence's reliability
ANSWER
D.
What are all living organisms are composed of ?
All living organisms are composed of cells, which themselves are formed of combinations of atoms. At a more fundamental level, living matter is composed of elements such as carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus, corresponding to the fundamental components of living matter like nucleic acids, proteins, carbohydrates, and lipids.
Explanation:All living organisms, from bacteria to humans, are made up of the basic unit of life, known as cells. Cells are both the smallest units of living matter and come in various sizes and shapes. They are often too small to be seen without a microscope, but their small size allows for a large surface area-to-volume ratio for efficient exchange of nutrients and wastes with the environment. Cells are classified into three types: archaea, bacteria, and eukaryotes depending upon their complexity.
At a more fundamental level, cells are made of a combination of elements that form atoms. These atoms combine to form molecules. In multicellular organisms, like animals, these molecules can interact to form cells, which then combine to form tissues, which make up organs. This process continues until an entire multicellular organism is built.
Notably, all matter, not only living organisms, is composed of various combinations of elements. Among the most abundant elements in all living organisms are carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. These elements form the nucleic acids, proteins, carbohydrates, and lipids that are the fundamental components of living matter.
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After the secondary stain has been added, gram-positive organisms are stained __________ and gram-negative organisms are stained _________
Which of the following best describes homeostasis in humans?
Answer:
Homeostasis is the tendency to maintain a relatively stable blood osmolarity despite taking in variable amounts of salt in the diet.
Explanation:
Homeostasis is the ability of an organism to maintain relatively stable internal conditions, such as stable blood osmolarity, despite the influence of external factors.
Final answer:
Homeostasis in humans is the maintenance of a stable internal state across various physiological systems through the coordinated efforts of the body's cells, tissues, organs, and organ systems, involving constant adjustments to internal conditions.
Explanation:
Which of the following best describes homeostasis in humans? Homeostasis in humans is the condition in which a system, such as the human body, is maintained in a more-or-less steady state. It is the responsibility of cells, tissues, organs, and organ systems throughout the body to maintain many different variables within narrow ranges that are compatible with life. This involves continuous monitoring of the internal environment and making constant adjustments to keep things in balance. Examples include maintaining a stable body temperature, blood glucose level, and hydration level. For instance, if the body becomes too warm, adjustments are made to cool it down, and if glucose levels in the blood rise, adjustments are made to lower them.
How is the DNA in a prokaryote different from the DNA in a eukaryote?
A. DNA in prokaryotes floats throughout the cell.
B. They have different numbers of chromosomes.
C. Only prokaryotes are haploid.
D. Eukaryotes do not have chromosomes.
Answer:
A
Explanation:
What hormone is released when the food you have just eaten reaches your stomach?
a. cck
b. secretin
c. gastrin
d. insulin?
The ________ is the part of the brain that holds the hemispheres together
Which question is most closely related to the field of biology?
A. How do you design a cheaper automobile?
B. What is the cause of cancer in mice?
C. What is the nearest planet to Earth?
D. How many planets are there in the solar system?
What is the cause of cancer in mice? is most closely related to the field of biology.
What is biology?A study of life is called biology. The Greek terms "bios" and "logos," which both imply "life," are the origin of the word "biology" (meaning "study"). Biologists generally research the composition, function, development, origin, evolution, and distribution of living things.
According to the Encyclopedia Britannica, biology is significant because it aids in our understanding of how organisms function and interact on a variety of levels (opens in new tab).
Researchers have been able to produce more food to feed a growing human population thanks to advances in biology. They have also been able to better understand how plants and animals may respond to environmental change and develop better medications and treatments for diseases.
Therefore, What is the cause of cancer in mice? is most closely related to the field of biology.
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Describe the process by which proteins are made and then exported from the cell
The process through which proteins are made is known as protein synthesis and exported from the cell to different organelles through the process of protein transportation or protein sorting.
What is Protein synthesis?Protein synthesis may be defined as a type of biological process through which proteins are developed in the cell. It occurs in two major processes. They are as follows:
Transcription: convert DNA into mRNA. It occurs in the nucleus of the cell. Translation: Convert mRNA into the sequence of amino acids. It occurs in the cytoplasm of the cell.Protein sorting is accomplished by the action of signal receptors which are present on the surface of each organelle. This is authorized by the involvement of secretory vesicles in which the developed protein is packaged and migrated to the site of action.
It distinctly involves two pathways such as anterograde from ER to the plasma membrane and retrogrades from the plasma membrane to the ER.
Therefore, the process by which proteins are made and then exported from the cell is well-described above.
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A researcher is creating pedigrees for a trait he suspects to be dominant in humans. what are some of the likely features of his pedigrees for families with this trait?
Answer:
The trait will be shown more frequently in the family pedigree. Rest of the characteristics will depend on whether it is an autosomal or X linked dominant trait.
Explanation:
A pedigree analysis is used to study inheritance of genes in a family. It is used for many purposes like finding out the genetic source of a disorder in family or predicting the trait outcome for future progeny based on status of family members. If it's a dominant trait, it would be expressed even with a single copy so such a pedigree shows the trait more frequently.
Further Explanation:
Autosomal dominant trait:
An autosomal dominant trait will express itself in both the sexes. Both the sexes will pass on the trait. Overall pedigree will have at least one affected member in every generation because it is dominant and sex independent. If around half of the children are affected and one parent is unaffected that means other parent is affected and heterozygous for the trait .X-linked dominant trait:
A X linked dominant trait will be more frequently presented by a female. A son with the trait will always have a mother with the trait because he inherited X chromosome from the mother. Daughter with the trait will have either one or both the parents affected by the trait. Fathers who have this trait will always have daughters with this trait becuase they will pass surely one X chromosome to the daughter.Learn More:
about pedigree: https://brainly.com/question/2952835 ( answer by JcAlmighty )
about different type of traits: https://brainly.com/question/7135379?section=similar ( answer by Palmss24 )
Keywords: pedigree, autosomal dominant, X-linked dominant, trait
Describe what is meant when water is called a polar molecule
Polar molecules are the molecules which gives charged molecules upon dissolving into water or other polar solvents. Water is considered a polar molecule because it gives charged species upon separation.
What is Polar molecule?A polar molecule is a molecule which has one end of the molecule slightly positive and the other end slightly negative. A diatomic molecule that consists of a polar covalent bond, such as HI, is a polar molecule. In this molecule, H is positively charged while I is negatively charged.
Water also written as H2O is a polar molecule. The bonds between hydrogen and oxygen are well-distributed. The hydrogen atoms are on both sides of the oxygen atom rather than evenly spaced. The oxygen in this molecule has a slight negative charge, while the side with the hydrogen atoms has a slight positive charge. This is called a polar molecule.
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Water is a polar molecule because of the uneven distribution of electron density, where oxygen is slightly negative and hydrogen is slightly positive, leading to unique properties like high surface tension and solvent abilities.
When water is referred to as a polar molecule, it means there is an uneven distribution of electron density across the molecule. Water, which has the chemical formula H2O, consists of one oxygen atom and two hydrogen atoms. The oxygen atom has a higher electronegativity, meaning it attracts the shared electrons more strongly than the hydrogen atoms. This results in the oxygen atom carrying a slightly negative charge, while the hydrogen atoms carry a slightly positive charge. The molecular structure of water is bent, not linear, which enhances its polarity. The consequence of this polar nature is that water molecules attract each other via hydrogen bonds, which is when the positive hydrogen end of one water molecule is attracted to the negative oxygen end of another. This unique property leads to the high surface tension and solvent abilities of water, making it critical for biological systems and chemical reactions.
Anaerobic exercise, such as weight training. does not burn as many calories as aerobic exercise
A cell in prophase ii of meiosis contains 12 chromosomes. how many chromosomes would be present in a cell from the same organism if it were in prophase i of meiosis?
a. 6
b. 12
c. 24
d. 48
e. no correct answer is listed.
It would not have occurred to her that an action which is ineffectual thereby becomes meaningless. what action is winston recalling?why is this gesture important to winston
Winston recalls a gesture from Julia in Orwell's 1984, where she brushes away a piece of dust. To Winston, this small act of normalcy and affection is deeply meaningful, symbolizing rebellion and connection in a controlled society.
The action Winston is recalling occurs in George Orwell's novel 1984. He recalls a time when Julia, his lover, made a gesture that seemed to be ineffectual but was deeply meaningful to him. Specifically, Winston remembers Julia calmly brushing away a piece of dust from the corner of a page in the book she was reading.
Winston finds this gesture important because it symbolizes normalcy, intimacy, and rebellion within a society that suppresses individual expression and affection. Although brushing away dust may seem like a trivial act, to Winston it represents a small yet significant act of defiance against the Party's attempts to control every aspect of their lives.
In a broader sense, this gesture is crucial to Winston because it reinforces his connection with Julia and his sense of humanity, which the Party strives to obliterate.
If we add the hydrogen peroxide with a graduated cylinder that had vinegar in it, the sample could get contaminated with a(n) ____. acid base oil all of the above
Answer:
acid
Explanation:
which two phyla are most closely related?
explain the importance of nutrients to an organism of your choice
How does exercise help the nervous system?
Why do we study atoms in biology?
What is one essential amino acid which cats cannot produce but dogs can?
Applicable beyond the time range of radiocarbon dating, amino-acid racemization is used primarily to date samples of
Use rhino to build a word that means surgical repair of the nose:
Clare just felt someone touch her shoulder. her _____ cortex was stimulated.
Which of the following balances is affecting by the local force of gravity
When the pancreas detects a high concentration of the blood’s sugar, glucose, it releases:
a. insulin.
b. antibodies.
c. adrenaline.
d. lymph.
e. glucagon?