(03. 02 HC)
A group of scientists build a special enclosure in the local bay to separate their experiment from the rest of the ocean. They wish to determine whether their experiment is
a closed system by using a colored dye that is placed in the water. What result would best indicate that their experiment is a closed system, and why?
Answers
The best result to indicate that their experiment is a closed system would be if the colored dye remains contained within the special enclosure and does not mix with the rest of the ocean.
This would demonstrate that there is no exchange of matter (in this case, the colored dye) between the enclosed experimental area and the surrounding ocean water. The reason this result indicates a closed system is because, by definition, a closed system allows energy to be exchanged with its surroundings, but it does not allow matter to be exchanged. If the colored dye does not leave the enclosure, it suggests that the scientists have successfully created a closed system for their experiment.
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Related Questions
What are homologous chromosomes?
Answers
Answer:
A couple of homologous chromosomes, or homologs, are a set of one maternal and one paternal chromosome that pair up with each other inside a cell during fertilization.
Explanation:
Answer:
A couple of homologous chromosomes, or homologs, are a set of one maternal and one paternal chromosome that pair up with each other inside a cell during fertilization.
Hope this helps. Can u give me brainliest
Explanation:
People who develop conspiracy theories claim to uncover secrets.
They believe that others have tried to hide the truth. What do you think of this quote by scientist Carl Sagan?
"Extraordinary claims require extraordinary evidence."
* agree
* Disagree
Explains why you voted the way you did? (In your own words)
Answers
The quote "Extraordinary claims require extraordinary evidence" by Carl Sagan is a statement that highlights the need for evidence to support claims that go beyond what is considered ordinary knowledge.
When someone makes a claim that is extraordinary or outside the norm, it requires a higher level of evidence to support it than a claim that is more in line with what is already known or widely accepted. This is because extraordinary claims often go against what is already established, and the burden of proof falls on the person making the claim to provide compelling and convincing evidence to support their position.
In the context of conspiracy theories, this quote is particularly relevant because conspiracy theories often involve extraordinary claims that challenge the established narrative understanding of events.
Therefore, before accepting or promoting a conspiracy theory, it is important to consider whether there is sufficient evidence to support the claims being made.
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What are enzymes?
please help
Answers
Answer:
.
Explanation:
Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products
Answer:
enzymes are proteins
Explanation:
Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions. The molecules that enzymes may act on are called substrates, and the enzyme converts the substrates into different molecules known as products.
10. Are the other phases of mitosis equal (or close)? Suggest a reason for any differences in the timing of mitosis phases.
Answers
The other phases of mitosis are not equal in duration. The time spent in each phase can vary depending on the cell type, the stage of development, and other factors.
Explanation:
For example, the duration of prophase can vary widely depending on the complexity of the chromosome structure, the degree of chromatin condensation, and the presence of any DNA damage or repair mechanisms. Metaphase is usually a relatively brief phase, lasting only a few minutes, as the spindle fibers align the chromosomes at the equatorial plate. Anaphase, on the other hand, can be relatively long, as the sister chromatids are separated and pulled towards opposite poles of the cell. Telophase is generally shorter than prophase or anaphase, as the spindle apparatus disassembles and the nuclear envelope reforms.
The timing of mitotic phases can be influenced by various factors, including the nature of the signal that triggers cell division, the availability of nutrients and growth factors, and the presence of DNA damage or other cellular stresses. Additionally, the rate of mitosis can vary depending on the cell type and the developmental stage, with rapidly dividing cells such as embryonic cells and cancer cells typically exhibiting shorter cell cycles than non-dividing cells.
Much of our world is made up of plants, soil, and water. What do you think is important about these three things? How do they
interrelate?
Answers
Answer:
si s plantas no lrspiermo xsdaa
Explanation:
There are several properties that are characteristic of a soil in which typical plants would grow well. Of the following, which would be the least conducive to plant growth? A. abundant humus B. numerous soil organisms
C. compacted soil D. high cation exchange capacity
Answers
There are several properties that are characteristic of a soil in which typical plants would grow well is compacted soil
The following elements of the environment have an impact on plant growth: light, temperature, water, humidity, and nutrients. It's critical to comprehend how these elements influence the formation and growth of plants.
Soil is the biologically active and porous medium that has developed in the uppermost layer of Earth's crust. It serves as the reservoir of water
Soil, also commonly referred to as earth or dirt, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life.
Soil has five major functions:
Provides a habitat for organisms.Recycles waste products.Filters water.Serves as an engineering material.Provides a medium for plant growth.To learn more about soil visit :https://brainly.com/question/13380405
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How would the amount of oxygen absorbed by the cells be different in an athlete who is blood doping, compared to a normal athlete?
Answers
The amount of oxygen absorbed by the cells is different in an athlete who is blood doping compared to a normal athlete because this last has less oxygen in the blood to carry out the process of cellular respiration.
Why oxygen is fundamental to getting energy in an athlete?Oxygen is fundamental to getting energy in an athlete because it is a reactant of the process of cellular respiration, thereby it is required to generate ATP, the energy coin of the aerobic cells, and thus produce muscle contraction during physical exercise.
Therefore, with this data, we can see that oxygen is fundamental to getting energy in an athlete and blood doping may increase the level of oxygen intake, thereby leading to a higher production of energy by the same unit of time and thus leading to higher (and illicit) performance.
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Why is caenorhabditis elegans an appropriate model organism for studying developmental processes?
Answers
Answer: of its invariant body plan, ease of genetic manipulation and low cost of maintenance
Explanation: Caenorhabditis elegans is a microscopic, soil-dwelling roundworm that has been powerfully used as a model organism since the early 1970″s. It was initially proposed as a model for developmental biology because of its invariant body plan, ease of genetic manipulation and low cost of maintenance.
What is the diffrence between genotype and phenotype.....
I look like a RAT ;-;
Answers
Answer:
A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics.
Explanation:
Describe the pathway of C4 plants.
Answers
A four carbon compound conveys the atoms of the CO2 into the bundle sheath cell via plasmodesmata
In the bundle sheath cells, CO2 is released and enters the Calvin Cycle
what would happen to trh production if a high percentage of na ligand-gated channels are affected by an allosteric inhibitor? (think about where we find na ligand-gated channels)
Answers
If a high percentage of Na ligand-gated channels are affected by an allosteric inhibitor, it can lead to a decrease in the production of TRH (thyrotropin-releasing hormone).
This is because Na ligand-gated channels are found in the hypothalamus, which is responsible for regulating TRH production.
These channels are involved in the depolarization of hypothalamic neurons, which in turn triggers the release of TRH from the hypothalamus. If the Na ligand-gated channels are inhibited, the depolarization process is disrupted, leading to a decrease in TRH production.
This can have a cascading effect on the endocrine system, as TRH is a key regulator of thyroid-stimulating hormone (TSH) production from the pituitary gland.
A decrease in TRH production can lead to a decrease in TSH production, which can ultimately affect thyroid hormone levels in the body.
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how do sigma factors recognize promoter sequence? group of answer choices by sliding, hopping, or transfer between very at-rich sequences located along dna helix by recognizing rna polymerase core bound to the promoter elements and recruiting sigma factor by recognition of specific dna cis-elements at position -10 and the equivalent of -35, as well as promoter configuration (distance between cis-elements) by counting 10 and 35 nucleotides upstream from the start of transcription on one side of the helix
Answers
Sigma factor recognizes by recognizing specific DNA cis-elements at positions -10 and -35, as well as promoter configuration, by counting 10 and 35 nucleotides upstream from the start of transcription on one side of the helix.
Sigma factors can perceive advertiser arrangements by perceiving explicit DNA cis-components at positions - 10 and - 35, as well as the advertiser design, which is the distance between the cis-components. This acknowledgment happens by counting 10 and 35 nucleotides upstream from the outset of record on one side of the helix. Sigma factors don't perceive advertiser arrangements by sliding, bouncing, or move between very AT-rich successions situated along the DNA helix. All things considered, they perceive advertiser successions by restricting to the RNA polymerase center bound to the advertiser components and enrolling the sigma variable to start record.
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some archaic homo sapiens specimens resemble homo erectus in having:
Answers
In terms of certain physical traits, some archaic Homo sapiens fossils resemble Homo erectus, including a long, low cranial vault with a sloping forehead a powerful postcranial skeleton.
For instance, the 400,000–200,000-year-old Zhoukoudian Homo erectus fossils from China have a cranial size of about 1000 cc and have a thick and protruding forehead ridge.
Similar to the Kabwe Homo heidelbergensis specimen from Zambia, which is thought to be roughly 300,000 years old, it exhibits a strong brow ridge and has a cranial size of about 1300 cc.
They have certain physical traits in common with Homo erectus, but they also exhibit traits that are more akin to those of contemporary people, such as a larger cranium and a less forward-projecting brow crest.
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The graph below shows changes in the populations of two species that interact only with each other over a period of time.
Which statement best describes these two species?
Species A is a producer and species B is its consumer.
Species A is a host and species B is its parasite.
Species A is a predator and species B is its prey.
Species A is a scavenger and species B is its decomposer.
Answers
The statement that best describes the two species depicted in the graph is option C) Species A is a predator and species B is its prey.
Option A indicates that species A is a producer and species B is its consumer. This means that species B requires the output from species A to survive. Knowing this, we would expect to show that species B increases in population as the population of A increases, due to increased food supply, the graph shows the opposite scenario. Thus, option A is false.
Option B states that perhaps Species A is a host and species B is its parasite. This provides the same conditions and dependencies as option a, so for the same reasons that a is false, we can conclude that option B is false as well.
The final incorrect option is D, Species A is a scavenger and species B is its decomposer. This would mean that as the population of species B dies off, it increases the food supply of Species A which feeds on the decomposing members of species B. We would expect in this case, that species A would flourish as B dies off, however, we see that as species B dies, species A follows shortly after. This tells us that option D is incorrect.
The correct option is C, Species A is a predator and species B is its prey. This would mean that species A consumes the members of species B to survive. Therefore we would expect to see
Species B thrive as the population of A remains lowFollowed by the steep decline of species B's population as more predators begin to appear. Once the population of species B reaches a critical point, species A will not have enough food supply to sustain its population, and both populations would decline.
This is exactly what the graph depicts, so option C is correct.
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A fossil contains 1/16 of the carbon -14 it began with. How old is the fossil?
Answers
Answer:
1/30
................
the most common mineral group is broken into the subgroups of ferromagnesium and non ferromagnesium
Answers
Answer: The answer would be Silicate
Explanation: They are made out of silicon and oxygen
What are all the known plastivores
Answers
Answer:
Catepillars
Explanation:
what would be the result if someone transected their spinal cord between t4 and t9? hemiplegia, parplegia, or quadriplegia
Answers
If someone transected their spinal cord between t4 and t9 the result is paraplegia
transected their spinal cord between t4 and t9 can go from can't walk, move their legs, or feel anything below their waist, as you can see the the dysfunction can occur
What is Paraplegia?Paraplegia refers to paralysis below the waist, usually affecting both legs, hips, and other functions such as sexuality and excretion. say they can't walk, move their legs, or feel anything below their waist, but the reality of having SCI varies from person to person and sometimes from day to day.
Paraplegia therefore implies significant impairment and motor impairment, not necessarily permanent and complete paralysis. People with spinal cord injuries rarely recover spontaneously. This may be due to still poorly understood brain or spinal cord functions, such as neuronal regeneration. People with spinal cord injuries can usually regain some function with physical therapy. Physical therapy retrains the brain and spinal cord to work around limitations while strengthening muscle and nerve connections.
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In your own words, describe how DNA replication and RNA transcription occur. Your answer should include the names and functions of at least 5 proteins for DNA replication. and at least 2 proteins for RNA transcription. In what ways are they similar, and in what ways are they different?
Answers
DNA replication is a process in which DNA is duplicated so that each new cell produced by cell division has a complete copy of the organism’s genetic information.
It occurs in the S phase of the cell cycle. DNA replication involves the action of many proteins. Here are the names and functions of 5 proteins involved in DNA replication:
1. DNA polymerase III: Adds nucleotides to the growing strand of DNA.
2. Helicase: Unwinds the double helix to make the DNA molecule accessible for replication.
3. Primase: Synthesizes RNA primers on the lagging strand.
4. Ligase: Joins Okazaki fragments on the lagging strand.
5. Single-strand binding protein: Prevents the two strands of DNA from re-forming a double helix. RNA transcription is a process in which DNA is used as a template to create a complementary RNA molecule. It occurs in the nucleus and involves the action of many proteins.
Here are the names and functions of 2 proteins involved in RNA transcription:
1. RNA polymerase: Adds nucleotides to the growing strand of RNA.
2. Transcription factors: Proteins that bind to DNA and help RNA polymerase locate the start site of the gene being transcribed.
Similarities between DNA replication and RNA transcription: Both processes involve the use of a DNA template to create a new molecule. Both processes require the action of polymerases.
Differences between DNA replication and RNA transcription: DNA replication produces a complete copy of the DNA molecule, while RNA transcription produces a complementary RNA molecule. DNA replication occurs in the S phase of the cell cycle, while RNA transcription can occur at any time. DNA replication involves the action of more proteins than RNA transcription.
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Remnants of osteons, which have been almost completely recycled by osteoclasts, are known as __________
Answers
Answer:
Lamellae
Explanation:
These lamellae are remnants of osteons whose matrix components have been almost completely recycles by osteoclasts. growth of the bone.
What will happen when a part of the chromosome breaks and attaches to another homologous chromosome?
Answers
Chromosomal translocation occurs when a piece of one chromosome separates and joins with a homologous chromosome. Depending on the location, size, and genes implicated in the translocation, a chromosomal translocation may have different effects on different people.
The individual might not be affected if the translocation takes place in a non-coding region of the chromosome. A genetic disorder or disease could, however, result from a translocation that happens in a coding region and disrupts a gene or changes how it functions. Depending on the specific genes involved and the degree of the disruption, chromosomal translocations can have mild to severe effects.
Chromosome translocations have been linked to cancer in some cases. Some translocations, such as the Philadelphia chromosome translocation, which is prevalent in most cases of chronic myelogenous leukemia, have been linked to particular cancer types.
It is possible for the chromosomal translocation to be passed on to kids and cause a genetic problem or disease in the following generation if it happens in germ cells (sperm or egg cells).
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describe how the position of the Earth Moon and Sun can be detected on Earth
Answers
Answer:
As the Earth rotates, it also moves, or revolves, around the Sun. As the Earth orbits the Sun, the Moon orbits the Earth. The Moon's orbit lasts 27 1/2 days, but because the Earth keeps moving, it takes the Moon two extra days, 29 1/2, to come back to the same place in our sky.
Explanation:
1) Which of the following statements is true?
A: Chloroplasts are the green chemicals inside a plant that allows plants to use the Sun's energy to make food.
B: Chlorophyll is a green chemical inside a plant that allows plants to use the Sun's energy to make food.
C: Chlorophyll is a green chemical inside the roots of a plant that allows plants to use the Sun's energy to make food.
D: Chlorophyll is a green chemical absorbed into a plant that allows them to use the Sun's energy to make food.
Answers
the answer is b ,: Chlorophyll is a green chemical inside a plant that allows plants to use the Sun's energy to make food.
along with nutrients, hormones, water, and gases, the cardiovascular system also transports T/F
Answers
along with nutrients, hormones, water, and gases, the cardiovascular system also transports is True.
In addition to transporting nutrients, hormones, water, and gases, the cardiovascular system also transports various other substances, including waste products like carbon dioxide and urea, immune cells, signaling molecules, and heat. The heart pumps blood through the blood vessels, which allows for the efficient distribution of these substances throughout the body.
what is hormones?
Hormones are chemical messengers that are produced and secreted by the endocrine glands in the body. They are released into the bloodstream and travel to different parts of the body where they bind to specific receptor sites on target cells, influencing the activity of those cells.
Hormones are involved in the regulation of many physiological processes, including growth and development, metabolism, reproduction, and the body's response to stress. They can be classified into different types based on their chemical structure, including steroid hormones, peptide hormones, and amino acid-derived hormones.
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Which of the following is the best definition of an unsaturated fatty acid? 8 A. A basic unit of a lipid that consists of single and double carbon-to- carbon bonds B. A compound that carries hereditary information C. An insoluble compound made up of glycerol and three fatty acids D. A basic unit of a lipid that consists of only single carbon-to-carbon bonds
Answers
PLEASE HELP (40 POINTS) What role might the processes of protein synthesis play in using CRISPR to modify a defective gene in an organism’s DNA? Do you think CRISPR and other forms of genetic engineering are helpful or harmful to humans?
Use what you know about protein synthesis to reflect on these questions.
Create a presentation of your ideas. Your presentation can be verbal, written, or drawn. Be sure to explain the reasoning behind your ideas. Be prepared to defend your ideas by considering a variety of different perspectives.
Answers
Answer:
That looks hard, search on google.
Explanation:
explain how living in a complex social group might select for increased cognitive abilities.
Answers
Living in a complex social group may select for increased cognitive abilities because it requires individuals to navigate and adapt to the complexities of social relationships and dynamics. This can include recognizing and responding to social cues, managing relationships, and coordinating group activities.
One example of how living in a complex social group can select for increased cognitive abilities is through the development of theory of mind. Theory of mind is the ability to understand that other individuals have their own thoughts, beliefs, and desires, and to predict their behavior based on this understanding. This ability is critical for successful social interactions and is thought to be selected for in complex social groups.
Another example is the development of social learning and cultural transmission. Social learning is the ability to learn from observing the behavior of others, and cultural transmission is the passing down of information and behaviors from one generation to the next. These abilities are important for adapting to changing social and environmental conditions and are thought to be selected for in complex social groups.
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How has the cell theory changed over time? Please help
Answers
Answer:
All living organisms are composed of cells, and all cells arise form others cells. these simple and powerful statements from the basis of the cell theory, frist formulated by a group of European biologists in mid 1800s. so fundement thread ideals to biology that is easy to they were not always thought to be true.
Explanation:
The area of the continental US most likely to have volcanic activity is the ______________
Answers
Answer:
Alaska
Explanation:
Alaska has the most active volcanos in America.
Answer:
Aleutian Islands
Explanation:
thx, u for helping us with the assignment
Answers
Answer:
i didnt answer it but yw ;)
Explanation: