The correct statement is chromosomes are long strings of DNA that are tightly packaged with proteins.
A chromosome is a lengthy DNA molecule that houses all or a portion of an organism's genetic code. The majority of the enormously long, exceedingly thin DNA fibers that make up chromosomes are covered by histones, the most important of these proteins in eukaryotic cells. These proteins condense and bind to the DNA molecule with the aid of chaperone proteins in order to maintain the integrity of the DNA molecule. The intricate three-dimensional structure of these chromosomes is essential for regulating transcription.
Often, during the metaphase of cell division, chromosomes can be observed using a light microscope (where all chromosomes are aligned in the center of the cell in their condensed form).
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Which of the following is an example of homeostasis in humans?
a. A bone breaks as a result of overwhelming force that has been applied to it.
b. The skin protects the surface of the body from bacteria and other microbial invaders.
c. The sound of a train is heard as it passes by an empty field.
d. The muscles begin shivering on a cold, snowy day.
Select the correct answer.
Henry was having glass of water with some ice cubes in it and kept it near a window for some time. After some time, the water became warm. What is
this process called?
A.
condensation
B. freezing
c. melting
D. sublimation
E. evaporation
Answer: C
Explanation: Melting is a process when a solid becomes a liquid. (The solid being the ice cubes)
rna polymerase from e. coli (core enzyme alone) has all of the following properties except that it:
RNA polymerase from e. coli (core enzyme alone) has all of the following properties except that it: recognizes specific start signals in DNA.
'What is RNA polymerase?'
In bacteria, all kinds of RNA transcription are catalyzed by a single DNA-dependent RNA polymerase. The promoter is bound to by RNA polymerase, which starts transcription (Initiation). It uses nucleoside triphosphates as its substrate and polymerizes using a template in accordance with the complementarity principle. Along with facilitating elongation, it also helps the helix open. Only a small portion of the RNA is still attached to the enzyme. The nascent RNA fall off as well as the RNA polymerase once the polymerases reaches the terminator region. As a result, transcribing is stopped. Only the elongation phase can be catalyzed by the RNA polymerase. To start and stop transcription, respectively, it briefly connects with initiation-factor and termination-factor.
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what is earliest event in the process of early development? a. implantation b. gastrulation c. formation of the placenta d. cleavage
Earliest event in the process of early development is Cleavage.
Fertilization marks the beginning of the embryonic developmental process. In order to ensure that only one sperm and one egg fuse together during fertilization, the process is carefully regulated. The zygote undergoes cleavage to form blastula.
The blastula goes through a process called gastrulation in which the three germ layers are formed. In some species, the blastula is a hollow ball of cells. The body's nervous system and epidermal skin cells are produced by the ectoderm, whereas muscle cells and connective tissue are produced by the mesoderm and interior organs are produced by the endoderm.
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Which would cause the greatest increase in the acceleration of a satellite?
a decrease in the radius and the tangential speed
an increase in the radius and the tangential speed
a decrease in the radius and an increase in the tangential speed
an increase in the radius and a decrease in the tangential speed
The greatest increase in the acceleration of a satellite caused due to a decrease in the radius and an increase in the tangential speed.
what is a satellite?
A satellite is an artificial object in space that orbits or circles around a bigger object which is launched into a temporary or permanent orbit around Earth. There are two kinds of satellites: Natural and artificial
what is a tangential speed?
Tangential speed can be measured by taking the circumference of the circular path the object is traveling along, and dividing the value by the time. it can also mean the linear speed of any object moving along a circular path.
what is radius?
A radius can be explained as a straight line from the center of a circle to the circumference of a circle.
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Which statement is not true concerning chromosomes?
Chromosomes do not retain integrity between cell divisions. Chromosomes retain integrity between cell divisions. All the other statements are true.
A chromosome is a lengthy DNA molecule that contains all or part of an organism's genetic code. The histones, which are the most significant of these proteins in eukaryotic cells, cover the vast majority of chromosomes' incredibly long, thin DNA fibers. In order to preserve the integrity of the DNA molecule, these proteins condense and attach to it with the help of chaperone proteins. These chromosomes' complex three-dimensional structure is crucial for controlling transcription.
Often, only a light microscope is needed to see chromosomes during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Each chromosome is duplicated before division (S phase), and a centromere connects the two copies.
The complete question is:
Which statement is not true concerning chromosomes?
The stretches of DNA between adjacent genes are called non-coding-DNA.
Chromsomes are long strings of DNA that are tightly packaged with proteins
Chromosomes do not retain integrity between cell divisions.
The DNA on each chromosome codes for about 25,000 genes.
Virtually all human cells have 23 pairs of chromosomes, making a total of 46 chromosomes per cell.
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Are there any environmental or pathological factors that can cause cancer ?
Answer:
Yes, environmental and pathological factors can both contribute to cancer. Environmental factors may include exposure to certain carcinogens, such as tobacco smoke, radiation, and certain chemicals. Pathological factors may include genetic mutations, inherited genetic mutations, and certain viruses.
Explanation:
when using the steps of the scientific method, which step would you use immediately after the development of a hypothesis?
FILL IN THE BLANK. in a long dna molecule, each origin of replication produces a _____ with a _____ on each side.
Answer:
replication bubble
; replication fork
Explanation:
In a long DNA molecule, each origin of replication produces a replication bubble with a replication fork on each side
i hope this helps
why agricultural plants are more affected then natural growth plants
Answer:
One reason is that agricultural plants are often grown in large quantities and are often monoculture crops, meaning that they are all the same species. This can make them more susceptible to pests and diseases, as these organisms can quickly spread through a monoculture crop and cause significant damage. Natural growth plants, on the other hand, are often more diverse and may not be as vulnerable to these types of problems.
Biofeedback can be used to control all of the following except __________. a. heart rate b. muscle growth c. brain waves d. skin temperature
Answer:
B muscle growth
Explanation:
Biofeedback is a technique you can use to learn to control some of your body's functions, such as your heart rate. During biofeedback, you're connected to electrical sensors that help you receive information about your body.
The number of children a set of parents
have to have to replace themselves is
known as
A. replacement level fertility
B. mortality
C. crude death rate
D. fertility
The number of children a set of parents have to have to replace themselves is known as replacement level fertility.
What is replacement level fertility?Replacement level fertility is the number of children that a couple needs to have in order to maintain the size of the population, assuming that the children survive to reproductive age and have children of their own. This number is typically around 2.1 children per couple, but it can vary based on factors such as mortality rates and the age at which people begin having children.
Replacement level fertility is an important concept in demography, which is the study of population size, structure, and dynamics. Understanding replacement level fertility can help policymakers and demographers forecast future population trends and make informed decisions about issues such as population growth, aging, and resource allocation.
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the parasympathetic division innervates more organs than the sympathetic division..
Answer:The sympathetic division innervates more organs than the
parasympathetic division.
Explanation:
The reaction A --> B + C + heat is released in a(n) _____ reaction. A. dehydration synthesis B. exchange C. endergonic D. anabolic E. exergonic
The reaction A --> B + C + heat is released in an exergonic (energy has been released).
An exergonic reaction is indeed a chemical reaction in which the change in limitless energy has been bad . If the system seems to be closed and the final and initial temperatures are equal, this indicates a reflex response. The Gibbs free energy is appropriate for processes that occur inside a closed system at the same pressure and temperature, while the Helmholtz energy is pertinent for processes that happen at constant temperatures and volumes.
In accordance with the second law of thermodynamics, any reaction that occurs at constant temperature with out input of electrical as well as photon energy is exergonic. Cellular respiration is an example.
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what type(s) of prokaryotic regulation fits the description? transcription occurs with high levels of the small molecule.
Positive inducible and negative repressible type(s) of prokaryotic regulation fits the description.
What regulates prokaryotic transcription?In prokaryotes, this means that the controls on transcription are straightforward activators and repressors. A quick and effective control mechanism is required. In order to alter from a default state of expression or non-expression, only one of the two regulatory mechanisms may be employed for particular genes.
Gene regulation comes in two flavors: positive and negative. Positive regulation is initiated by activators (and occasionally inducers), whereas negative regulation is initiated by repressors. An operon is bound by an activator or inducer, which either speeds up transcription or permits it to continue.
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epithelial tissues always exhibit polarity; that is, they have a free surface and a basal surface. t or f
True, the epithelial tissues always exhibit polarity that is they have a free surface and a basal surface.
Tissues are corporations of cells that have a similar shape and act collectively to perform a selected function. The phrase tissue comes from a form of an old French verb that means “to weave”. There are 4 one-of-a-kind sorts of tissues in animals: connective, muscle, nervous, and epithelial.
In easy terms, tissue may be defined as a collection of cells with comparable forms and features termed as tissues. They shape a cellular organizational level, intermediate between the cells and the organ machine.
They constitute a stage of enterprise and cell differentiation in residing organisms. Tissues perform various capabilities including transportation, digestion, respiration, and so forth.
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How many chlorine atom are on the product ide of the reaction 2Al 6HCl → 2AlCl3 3H2?
2
3
6
9
Six chlorine atoms make up the chemical product 2Al + 6HCl → 2AlCl3 + 3H2 product ion.
The fundamental unit of matter, the atom, is regarded as such.The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics.
Al CHl stands for aluminum chloride, H2 for hydrogen gas, and HCl for hydrochloric acid in this instance.
Aluminum reacts with hydrochloric acid in the example.
Aluminum chloride and hydrogen gas are the byproducts of the reaction 2Al + 6HCl → 2AlCl3 + 3H2
Calculating the number of chlorine atoms in the reaction's result indicates that there are 2*3=6.
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in both eukaryotes and prokaryotes, gene expression is primarily regulated at the level of
Answer:
Gene expression in prokaryotes is mostly regulated at the transcriptional level (some epigenetic and post-translational regulation is also present), whereas in eukaryotic cells, gene expression is regulated at the epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels.
which species concept would be most useful to a team of biology students conducting a biodiversity survey on their campus?
The Phylogenetic Species Concept would be the most useful to a team of biology students conducting a biodiversity survey on their campus. This concept is based on the evolutionary history of organisms and focuses on the evolutionary relationships between species. It is useful for identifying species boundaries and understanding the evolutionary history of a given group of organisms.
The species concept most useful to a team of biology students conducting a biodiversity survey on their campus would be the Biological Species Concept. This concept defines a species as a group of individuals that are able to interbreed and produce viable, fertile offspring. This concept is useful because it provides a clear and objective way to identify species based on their reproductive capabilities.
To use this concept, the team of biology students would first need to collect data on the various organisms they encounter on their campus. They would need to document the physical characteristics of each species as well as any other ecological or behavioral data that might be relevant to their survey.
Once the data has been collected, the team of biology students would need to determine which organisms on their campus were able to interbreed. This could involve observing mating behaviors or conducting genetic tests to assess whether two individuals were related.
Once the team has identified which organisms are capable of interbreeding, they can then assign them to the same species. By using the Biological Species Concept, the team of biology students can more accurately assess the biodiversity of their campus, allowing them to better understand and protect the local ecosystems.
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__act as biological catalysts allowing reactions to occur at the rate necessary
Desalinization plants are becoming more common in places which have experienced?
Option d is Correct. In areas where fresh water is scarce, desalinization facilities are becoming more prevalent.
In areas where there has been a fresh water shortage, desalination facilities are becoming more widespread. Seawater is made safe to drink through the desalination process, which takes the salt and other minerals out of it. When there aren't enough freshwater supplies or the freshwater that is available is of poor quality, it is frequently used in coastal locations.
By delivering a consistent supply of pristine, pure water, desalination facilities can help with water shortages. The release of brine, a highly salted byproduct, into the ocean is one example of how they may have an adverse effect on the environment and are costly to build and run.
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Correct Question:
Desalination plants are becoming more common in places which have experienced ____
a. an influx of refugees
b. damaging earthquakes
c. mass deforestation
d. shortages of fresh water
most animals a. are vertebrates. b. are invertebrates. c. lack symmetry. d. are radially symmetrical. e. belong to the chordate group.
Answer:
A
Explanation:
this is my guess personally
if a living plant were moved from a freshwater aquarium to a saltwater aquarium, which of the following would occur? a-nothing. the plant would be fine in either aquarium b-the plant's cells would lose water and plasmolysis would occur c-the plant's cells would take on ions d-the plant's cells would take on water and would lyse
Answer: B
Explanation: The plant's cells would lose water and plasmolysis would occur
If a living plant were moved from a freshwater aquarium to a saltwater aquarium, the plant's cells would lose water and plasmolysis would occur. The correct option is b.
What fresh water and salt water?While saltwater is water found in oceans and seas, freshwater is naturally occurring water that has a low percentage of salts and other dissolved particles. Because it contains more salt than freshwater, saltwater is denser.
When it rains, freshwater dilutes the surface salt water, making it less salty. When freshwater flows across land, saltwater is created. When water flows over rocks, the minerals are eroded and combined with the water, which eventually makes its way into the oceans.
Therefore, the correct option is b- the plant's cells would lose water and plasmolysis would occur.
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Identify structures of organic compounds and functional groups (carboxyl, amine, phosphate, hydroxyl)
Answer:
Explanation: they are all hydrophilic and increase the solubility of the organic compound
Hydroxyl -OH
Carbonyl =C=O
Carboxyl -COOH
Amino NH2
Phosphate PO 3- 4
n _____ muscle, some calcium needed for contraction is from the extracellular fluid.
Some of the calcium required for contraction in cardiac and visceral smooth muscle comes from extracellular fluid.
Normal functioning necessitates the presence of calcium, oxygen, and adrenaline, all of which might modify the contraction's power. This simulation looks at the variables that affect cardiac muscle contraction. The "data" you will gather was captured during recordings of the test circumstances you will encounter in this simulation, therefore it is "actual" data. Visceral, or smooth, muscle is present in blood arteries as well as internal organs like the stomach and intestines. It is known as a smooth muscle because, in contrast to skeletal or cardiac muscle, it .
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In flowering plants the integuments of the ovule develop into a(n) _____.
cotyledon,
seed coat,
endosperm,
sporophyte,
fruit
In flowering plants the integuments of the ovule develop into seed coat.
Ovules turn into seeds after being fertilized in a flower. The ovule's inner integument is called Tagmen, and the outer integument is called Testa. The two layers of the seed coat are called testa and tagmen. The inside seed coat is Tagment, which is very fragile, while the outside seed coat is Testa, which is quite tough. Consequently, integuments change into the seed coat.
The outcome of fertilization or sexual reproduction in plants are the seeds and fruits. In angiosperms, the ovary matures into the fruit, whereas the ovules mature into the seeds encased in the fruit. Gymnosperms and angiosperms both produce seeds.
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a scientist splices a eukaryotic promoter in front of a bacterial gene and inserts the gene in a bacterial chromosome. would you expect the bacteria to transcribe the gene? why or why not?
The diagram shows the electric field due to point charge Q. The negative charge, A, is within the field.
Charge Q has vectors radially outward starting perpendicular from the surface. The farther you get from the charge, the shorter the vectors. All vectors point towards the charge. A point labeled A is just to the right of the charged object.
Which statements are correct? Check all that apply.
Charge Q is positive.
Charge Q is negative.
The electric field is uniform.
The electric field is nonuniform.
If charge A is negative, it moves away from charge Q.
If charge A is positive, it moves away from charge Q.
The electric field due to point charge Q is nonuniform. If charge A is negative, it moves away from charge Q. These statements are correct, based on the information provided in the diagram.
In the diagram, the electric field lines radiate outwards from charge Q in all directions, indicating that the electric field is nonuniform. The electric field lines are denser near the charged object and become less dense as they move away from it, indicating that the strength of the electric field decreases with distance from the charge. This means that the electric field is nonuniform, as the strength of the field varies depending on the distance from the charge.
In addition, the electric field lines are directed radially outward from the charge, indicating that the electric field is repulsive. This means that if charge A is negative, it will be repelled by the electric field and will move away from charge Q. However, if charge A is positive, it will be attracted to charge Q and will move towards it.
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the cell membrane allows the cell to stay structurally intact in it's water-based environment. question 9 options: true false
False. The cell membrane DOES NOT allows the cell to stay structurally intact in it's water-based environment.
The lipid fraction of the membrane bilayer makes cell membranes waterproof. Cell membranes are composed of a phospholipid bilayer containing proteins.
As a result, the cell membrane serves two functions: first, as a barrier that keeps cell constituents in and undesirable substances out, and second, as a gate that allows essential nutrients into the cell and waste products out.
Small polar molecules like water and ethanol can also transmit through membranes but at a slower rate. Cell membranes, on the other hand, limit the diffusion of highly charged molecules such as ions as well as large molecules such as sugars and amino acids.
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1.) when you are looking through an aquarium at the fish, is the fish as close as it appears? explain.
When you are looking through an aquarium, at the fish your fish seem larger or closer than the actual one because light enters into the water and gets refracted. If you look at it from a side view, you will get a slightly different perspective.
Snell's law is characterized as "The proportion of the sine of the point of occurrence to the sine of the point of refraction is a steady, for the light of a given color and for the given sets of media". Refraction is the bowing of a wave when it enters a medium where its speed is unique. The refraction of light when it passes from a quick medium to sluggish medium curves the light beam toward the typical limit between the two media. Subsequently, there are two sorts of refraction, to be specific, normal and artificial refraction. A typical illustration of normal refraction is air refraction. Because of this climatic refraction, the light from the sun arrives on the earth and spreads everywhere. Refraction relies upon the thickness of the medium.
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