The cultures are arranged in a order as follows :
Culture 1 > Culture 3 > Culture 2 .
Culture 2 is expected to contain most cells because the lac operon metabolizes lactose only when the cells are needed and saves energy for replication. However, since cells in culture 3 can metabolize lactose, we can expect slightly fewer cells in culture 3, but they are not very efficient in terms of energy. Culture 1 dramatically reduces the number of cells because these cells cannot metabolize lactose.
The gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions for making molecules called proteins. However, many genes do not encode proteins.
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Fe + O₂- Fe₂O3
What will make this equation balanced?
Answer:
Explanation:
Fe + O2 → Fe2O3 is the unbalanced form of chemical reaction.
Balancing the simple molecules first, in this case the O2
Fe + 3O2→ Fe2O3 there are now 6 O atoms on the left, there must also be 6 O atoms on the right.
Fe + 3O2 → 2Fe2O3
Balance the rest of the equation.
4Fe + 3O2→ 2Fe2O3
In an energy pyramid, the amount of energy at the producer level is 475,650 kilocalories. the pyramid has four trophic levels, including the producer level. assuming that 10% of the energy is retained at every level, how much energy is available for the second-level consumers? the energy available for the second-level consumers is kilocalories.
The energy available for the second-level consumers is 4756.5 kilocalories.
A trophic level is a position in the food chain or nutrient cycle of an ecosystem. Based on their eating habits, organisms in a food chain are divided into various levels. The first trophic level is usually occupied by producers that can synthesize their own food.
The efficient energy transfer from one trophic to another is only 10% rest of the energy is lost in the ecosystem. The studies of the transfer of energy in different food chains in a large number of ecosystems have revealed a uniform pattern, which is stated as the 10 percent law by Lindemann. According to this law, only 10 percent of the energy entering a particular trophic level of organisms is available for transfer to the next higher trophic level.
Calculation:
Producers (475650 kilocalories) —> Primary consumers (10% of 475650 = 47565 kilocalories) —> Secondary consumers (10% of 47565 = 4756.5 kilocalories).
So, the energy available for second-level consumers is 4756.5 kilocalories.
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Answer:
4756.5
Hope this helps!
Explanation:
Innate immunity includes all of the following EXCEPT Group of answer choices phagocytosis. inflammation. production of antibody. production of interferon. activation of complement.
Innate immunity includes all of the following EXCEPT option(c) i.e, production of antibody.
What is innate immunity?Innate immunity, also known as nonspecific immunity, is the defense mechanism you were born with and shielded from all antigens by it. Barriers that prevent hazardous substances from entering your body are a part of innate immunity. These barriers serve as the immune system's first line of defense.
Three protective mechanisms of the innate immune system can be distinguished: physical barriers, cellular components, and humoral responses.
There are four primary elements of innate immunity:
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Explain how african feminism can help you to implement equal opportunities for male and female teachers at your school.
African feminism can help you implement equal opportunities because it is a movement that fights for social equality and rights for women and seeks to combat the social model based on patriarchy and abuse and violence against women.
What does feminism stand for?Feminism is a social movement for civil rights, led by women, which from its origins claims
politicallegal and social equalitybetween men and women. Its performance is not sexist, that is, it does not seek to impose some kind of female superiority, but equality between the sexes.
With this information, we can conclude that In feminism, the woman thinks she is superior to the man in many other ways.
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What is a response?
A. the transmission of a signal through neurons
B. a change in the environment around an
organism
C. how an organism answers to a change in its
environment
D. the senses recognizing the surroundings
A response is how an organism answers to a change in its environment, which is option B. Details about response can be found below.
What is a response?A response in biology refers to any behavior of a living organism that results from an external or internal stimulus in the environment.
A stimulus is something external that elicits or influences a physiological or psychological activity or response.
Therefore, it can be said that a response is how an organism answers to a change in its environment (stimulus).
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The MOST distinctive feature of ape dentition, which clearly distinguishes apes from Old World monkeys, is
The most distinctive feature of ape dentition, which clearly distinguishes apes from Old World monkeys, is a Y-5 molar pattern.
What is the Y-5 molar pattern?This is a distinctive type of molar teeth pattern found in apes and hominoids.In this, 5 cusps or raised surfaces are present on the grinding surface of teeth, roughly forming a Y- shape. Therefore, this is also known as Y-5 pattern.Whereas Old world monkeys have only 4 cusps on their lower molars present in a bilophodont pattern.A Y-5 molar is formed when the tooth is divided into different pieces which form the complete structure of the tooth.In bilophodont pattern the tooth is divided into 2 symmetric sections.The dental formula of apes is 2.1.2.3/2.1.2.3 i.e. 2 incisors, 1 canine, 2 premolars, 3 molars.Learn more about dentition in apes here:
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What can DNA be compared to?
A. a dictionary
B. a book
C. a virus
D. a computer program
In working with Drosophila it is common to use a balancer stock to maintain mutations of interest. The balancer chromosomes are generally carrying multiple inversions on them. What effect would the inversions have on meiosis
The inversion would suppress recombination.
In Drosophila, the mutations which are recessive are lethal or recessive sterile. Balancer chromosomes are used to hold the deleterious mutations in stable shares as well as to save you recombination with the aid of suppressing.
Chromosomal inversions prevent the recuperation of recombinant chromosomes in ways.
the crossovers do now not shape within the location of inversion breakpoints, due to the fact synapsis is inhibited.unmarried crossovers' inner inversions result in aneuploid gametes that cannot give upward push to normal progeny.Drosophila is a genus of flies, belonging to the own family Drosophilidae, whose participants are often referred to as "small fruit flies" or (much less regularly) pomace flies, vinegar flies, or wine flies, a connection with the feature of many species to linger around overripe or rotting fruit.
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Vitamin B12 Is Important for the body to function. It helps keep nerve cells healthy, and it helps with the formation of red blood cells.
When someone is vitamin B12 deficient, one of the reasons could be that the person's
efficiently.
ghts reserved.
Reset
Next
large intestine
small intestine
stomach
is not
the vitamin efficiently?
Answer:
stomach
Explanation:
stomach does not make enough intrinsic factor protein, the intestine cannot properly absorb vitamin B12.
medlineplusgov
What is DNA replication and what are the steps 50 POINTS pls help fast
Answer:
In molecular biology, DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment!! :)
Cytopathic effects are changes in host cells due to Group of answer choices viral infections. protozoan infections. fungal infections. bacterial infections. helminthic infections.
Cytopathic effects are changes in host cells due to viral infections. Thus, the correct option is A.
What are Cytopathic effects?Cytopathic effects may be defined as the process of structural transformations in a host cell resulting from viral infection.
Cytopathic effects happen when the infecting virus provokes lysis of the host cell or when the cell perishes without the process of lysis because of its ineptitude to reproduce.
As a result, this virus causes morphological transformations in the host cell is known as cytopathogenic.
Therefore, the correct option for this question is A.
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Which structure is continuous with the septa that subdivide the interior of the testis into separate lobules
Tunica albuginea is continuous with the septa that subdivide the interior of the testis into separate lobules.
The human testis is about 1.5 to 2 inches long. It is covered by tunica albuginea which is a fibrous sac-like structure that also extends into the testis. These extensions act as partitions in the testis which helps in dividing the testis into 250 compartments (approximately).
The tunica albuginea sac is made up of type I collagen and a small amount of elastic type II collagen and elastin are also seen. Tunica albuginea has a bilayer structure in which the inner one is a circular layer and the outer one is the longitudinal layer. The emissary veins pass through the tunica albuginea and trap blood in the male reproductive organ when they become compressed (during engorgement).
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A ball is throwing up straight into the air what happens to the ball speed as it goes up and as it comes down?
Answer:
the speed of the ball remains the same.
Explanation:
due to newtons law of what goes up must come down applys to this question, and therefore the speed doesn't change.
The P50 for myoglobin is 2.8 torr. At what oxygen concentration will myoglobin be 75% saturated with oxygen
At 8.4 torr myoglobin will be 75% saturated with oxygen.
Calculation :
P50 is the partial pressure of the system. To achieve 50% saturation of oxygen to bind to myoglobin, the partial pressure needed is P50
P50 =2.8 torr
so, Mb+ O2 = MbO2
K= [Mb] [O2]/[MbO2]......................(1)
Yo2 ( fractional saturation of myoglobin )
Yo2=[MbO2]/[Mb]+[MbO2]..........................(2)
From equations (1) and (2)
We get Yo2= [O2]/K+[O2]= Po2 /K+ Po2
i)Yo2= 50% =2.8/K+2.8
0.5= 2.8/k +2.8
So, K= 2.8
ii) 75 % = [O2]/K+[O2]= [O2]/2.8+ [O2] = 8.4
Therefore, the oxygen concentration will be 8.4 torr.
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The first step in most stoichiometry problems is to
a. add the coefficients of the reagents
b. convert given quantities to moles
c. convert given quantities to volumes
d. convert given quantities to masses
The first step in stoichiometric problems would be to convert given quantities to moles.
Solving stoichiometric problemsStoichiometric problems make use of the number of moles of individual components of reactions.
Thus, apart from the stoichiometric number of moles that are obtained from the balanced equations of reactions, the first step would be to convert any given quantity to the number of moles.
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Are there any parts of the human body that get oxygen directly from the air and not from the blood?
Answer:
The cornea is the only part of a human body that has no blood supply; it gets oxygen directly through the air.
Explanation:
Answer:
Yes. Upper-layer skin cells and the cells in the front surface of the eyes get a significant amount of oxygen directly from the air
Explanation:
The tarsier Group of answer choices is unquestionably a prosimian/Strepsirhines is more closely related biochemically to anthropoids/Haplorhini than to prosimians. is a hominin is a New World monkey.
The tarsier is more closely related biochemically to anthropoids/Haplorhini than to prosimians.
Prosimians include monkeys, apes, and humans (simians), however tarsiers are more closely linked to anthropoids/Haplorhini than other prosimians.This position on the primate family tree, where tarsiers resemble monkeys and apes more than lemurs and lorises,In contrast to lemurs, which have epitheliochorial placentas, they have hemochorial placentas that give birth to rather big children. Monthly sexual cycles in female tarsiers are accompanied by swellings resembling those in several Old World monkey species.learn more about tarsier here: https://brainly.com/question/926621
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If one person in 50 is a carrier of an autosomal recessive disorder in a population, the chance that an unrelated man and woman are both carriers is
If one person in 50 is a carrier of an autosomal recessive disorder in a population, the chance that an unrelated man and woman are both carriers is 1/2500.
What is the genetic likelihood?The expression 'genetic likelihood' refers to the estimation to have a given phenotype (in this case, a recessive disorder).
The genetic likelihood that an unrelated man and woman are both carriers for a disorder that has an incidence of 1/50 in the population is equal to 1/50 x 1/50 = 1/2500.
In conclusion, the chance that an unrelated man and woman are heterozygous (carriers) for a autosomal recessive disorder that exhibits an incidence of 1/50 in the population is 1/2500.
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Which of the following is NOT one of the
abiotic factors that affects freshwater biomes?
A. nutrients
B. temperature
C. sunlight
D. rock formations
Answer:
D. rock formations
Explanation:
because it wouldn't affect the environment's qualities (only how it looks physically)
Rock formation is not one of the abiotic factors that affects freshwater biomes. So, the correct option is (D).
What are Abiotic Factors?Abiotic components are defined as the non-living chemical and physical parts of the environment that affect the functioning of living organisms and ecosystems. Abiotic factors and the phenomena associated with them underlie biology as a whole.
Some examples of abiotic factors in an ecosystem include sunlight, temperature, and the availability of nutrients.
So many organisms have evolved to be able to function in the presence of these abiotic factors that there are also organisms which can survive in the absence of these factors, such as some microorganisms that require a certain temperature range to grow.
Thus, Rock formation is not one of the abiotic factors that affects freshwater biomes. So, the correct option is (D).
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True or false: The integument is strictly composed of the skin. It does not include the various accessory structures that may be present on or beneath the skin layers.
The statement that the integument is strictly composed of the skin and It does not include the various accessory structures that may be present on or beneath the skin layers is False.
Composition of integumentTogether with the underlying epidermal cells that secrete the cuticle, the cuticle and integument make up the skin. The cuticle functions as the insect's exoskeleton, the location of muscle attachment, and the first line of protection against fungi, bacteria, predators, parasites, and environmental toxins, including pesticides. The integument plays a role in behavior, osmoregulation, water control, eating, excretion, desiccation resistance, and as a food reserve. The complexity of the structure and chemistry of an insect's integument as well as the unique ways in which it has been modified to work within its owner's environment serve as some indicators of the variety of roles that these coverings play.To learn more about the Skin layers refer to:
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In this experiment, optical density is measured using a _______. In this experiment, optical density is measured using a _______. microscope thermocycler spectrophotometer caliper
In this experiment, optical density is measured using a spectrophotometer.
The spectrophotometer is a device that calculates how much light a substance absorbs. The spectrophotometer measures the light intensity of a sample by passing a light beam through it. Based on the Beer-Lambert rule, spectrophotometers may determine a solution's concentration by measuring the light intensity with wavelengths.A spectrophotometer is a device that counts the number of photons (light's energy) absorbed after they have passed through a sample solution. By measuring the intensity of light detected, the spectrophotometer may also estimate the quantities of a known chemical compound.
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Someone please help
Answer:
1)Increase
2) oxygen and nitrogen
Explanation:
1) increases b/c if radiation is not going into space, its just staying in our atmosphere and heating stuff up cuz radiation is just heat.
2) This I am not 100% sure but it should be oxygen and nitrogen based on what I found on the web. https://chandra.harvard.edu/xray_astro/absorption.html
Somebody Help me please
Answer:
shorter, more
Explanation:
When a gamma ray and a radio wave are compared, a gamma ray has a shorter wavelength and more energy than a radio wave.
Once a subspecies evolves into a species, it may be unable to breed with another group from its original species. Barriers to this kind of reproduction include
Group of answer choices
geographic isolation.
infertility.
all of the choices.
lack of physical attraction.
what is a membrane???????
Answer:
Membrane is a barrier which protects what comes in and out...
Explanation:
Hope It Helps!!!
A membrane is a thin wall or layer made up of biological substances such as cellulose or lipid.
What is the role of a membrane?A membrane is a thin sheet that protects the cell from the outer environment, and they make a sheet or separation between the cell interior and the exterior.
It helps in the transfer of material from the cell and in the cell and gives the cell structure and rigidity.
Thus, A membrane is a thin wall or layer comprised of cellulose or lipids, which are biological materials.
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Drag the tiles to the correct boxes to complete the pairs.
Match each cause with the effect it had on jews during their time in Nazi ghettos.
1. The Nazis did not bother to arrange for the safe disposal of human waste and garbage in the ghettos. > answer
diseases were rampant in the ghettos
2. Food and other necessities became scarce in the ghettos.> answer
Many Jews died of starvation and poor health
3. The Nazis used healthy Jewish prisoners to perform hard labor.>
answer
Weak and sick Jews were the first to be deported to concentration camps.
these are the answers i just took the test!!
In pulmonary ventilation, the movement of gases is between the ______ and the ______. Multiple choice question.
In pulmonary ventilation, the movement of gases is between the atmosphere and the alveoli.
What are alveoli?The alveoli (singular alveolus) are sacs that fill with air during the respiratory process of higher animals.
These structures (alveoli) are located in the lungs where function to change oxygen and CO2.
In conclusion, gases move between the atmosphere and the alveoli.
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Cross-contamination can occur when uncooked foods containing live microbes come into contact with foods that have already been cooked. true false
Answer:
True
Explanation:
Cross-contamination is how bacteria can spread. It occurs when juices from raw meats or germs from unclean objects touch cooked or ready-to-eat foods.
i think it's the correct answer
5. Which component of the lymphatic system filters lymph from the upper limbs and upper external part of the thorax
The subclavian trunks of the lymphatic system filter lymph from the upper limbs and upper external part of the thorax.
The lymphatic system is an open system and is a part of the immune system. It consists of lymphatic vessels, lymph nodes, lymphoid tissues, and organs.
The lymphatic system is responsible for the circulation of a clear fluid which is known as the lymph.
The lymph contains lymphocytes which help in fighting against infections and diseases. The lymphocytes are produced in the primary lymphoid organs which are the thymus and bone marrow.
The subclavian trunks are formed after the unification of the efferent vessels of the subclavicular groups.
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Why do you think it is important to study the science of human life (biology) in psychology
Answer:
to understand the human and animal behaviour
Explanation:
By looking at the biological bases of human behavior, psychologists are better able to understand how the brain and physiological processes might influence the way people think, act, and feel.