Explanation:
1)steady-state theory, in cosmology, a view that the universe is always expanding but maintaining a constant average density.so the answer is B
2)Hubble's law, also known as the Hubble–Lemaître law or Lemaître's law, is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance.so the answer is A
3)B
what is the value of atmospheric pressure in see level
Answer:
about 14.7 pounds per square inch
Answer:
about 14.7 pounds per square inch
Explanation:
Which of the following is an example of a density dependant factor?
A. Industrial pollution in a river
B. An herbivore species and a carnivore species sharing a habitat
C. 3 different herbivore species sharing the same field
D. A volcanic eruption
Three different herbivore species sharing the same field is an example of a density dependent factor (Option C).
What are density dependent factors?The density-dependent factors are those variables that affect the growth of a population regarding the number of individuals in such population.
Density-dependent factors include, among others, competition within the population or between populations, the presence of predators, etc.
In conclusion, Three different herbivore species sharing the same field is an example of a density dependent factor (Option C).
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Human blood type is an example of what where both the A and B blood types can be expressed semiagenously
Codominance is an inheritance pattern. Human blood type is an example of CODOMINANCE where both the A and B blood types can be expressed.
What is codominance?Codominance refers to the inheritance pattern in which a phenotype expresses two alternative variants coded by two alleles inherited from each homozygous parent.
When two individuals, that are homozygous and different for a trait, are crossed they produce heterozygous individuals.
These progenies express both parental phenotypes, as it is an additive expression of their parents' genes. Both alleles are equally expressed.
The is not complete dominance in these cases.
In the case of blood, the I gene determines the blood type of a person.
→ I is completely dominant over the i recessive allele.
→ Allele I can be either IA and IB, which are codominant.
The person IAi expresses the A blood type ⇒ complete dominanceThe person IBi expresses the B blood type ⇒ complete dominanceThe person IAIB expresses the AB blood type ⇒ codominance ⇒ both alleles are simultaneously expressedHuman blood type is an example of CODOMINANCE where both the A and B blood types can be expressed.
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Using the molecular data, make a general statement which compares the "rabbit-whale"
relationship to the "dog-pig" relationship. Does the cladogram agree with this statement?
Explain your reasoning
The comparison of the "rabbit-whale" relationship to the "dog-pig" relationship on the cladogram is linked based on their evolutionary relationships.
What is a Cladogram?This refers to the branching diagram that is used to show the link and the cladistic relationship that exists among different species.
Hence, we can see that based on the fact that rabbit-whale and dog-pig have a common ancestor and origin, on a cladogram, it can be stated and proven that they have an evolutionary relationship.
Therefore, the use of cladograms makes use of molecular data to show the homology level of nucleotide sequences of the genome.
Therefore, when the relationship of the "rabbit-whale" relationship to the "dog-pig" relationship was analyzed on the cladogram, it was found that they have a common ancestor.
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Explain three main features of the following: a) Glycolysis b)Kreb's cycle c)Electron transpot chain
Answer:
A)Glycolysis is one method that cells use to produce energy.
B)a sequence of reactions in the living organism in which oxidation of acetic acid or acetyl equivalent provides energy for storage in phosphate bonds called also citric acid cycle, tricarboxylic acid cycle.
C)electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation.
what if there are no primary consumers in the ecosystem??
There wouldn't be any secondary consumers in that ecosystem without the primary consumers since there would be no way for carnivores or secondary consumers to get their energy.
Why are primary consumers important?
A primary consumer is important to an ecosystem. They aid in the energy exchange that is necessary for an ecosystem to function properly and avoid collapse. Only primary consumers have the capacity to "harvest" the energy held in producers.
Plants, who are the primary producers, use sunlight to make their own food or photosynthesis. And hence they are known as autotrophs. Following that, primary consumers eat plants. The primary consumers are then eaten for food by secondary and tertiary consumers.
The organisms at the top of the food chain, including humans, then perish. Then, for food, decomposers like bacteria and fungi feed on the remnants. The chemical components of those nutrients are then recycled back into the ecosystem by these decomposers.
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Which phrase best describes a process represented in the diagram below?* 5 points
---
Fertilized egg
O a zygote dividing by mitosis
a zygote dividing by meiosis
a gamete dividing by mitosis
a gamete dividing by meiosis
Multicellular
organism
The image shows a zygote dividing by meiosis.
What is cell division?We know that cell division occurs when a cell breaks up to give daughter cells. This could occur by mitosis or by meiosis. In each case, we have two or four daughter cells being formed.
Now we have to look at the image very well. We can see that the process is occurring inside the gamete cells. There is a fertilized egg that divides into two. We know that a fertilized egg is called a zygote.
In conclusion, we can say that, the image shows a zygote dividing by meiosis.
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help look at the picture
The Steady State Theory state that the density of the universe was remaining constant.
Steady State Theory:In cosmology, a steady-state theory is a perspective that holds that the universe is constantly expanding while maintaining a constant average density. According to this theory, the matter is continuously created to form new stars and galaxies at the same rate that older ones fade away due to their expanding distance and accelerating recession. The average density and configuration of galaxies are the same as any location in a steady-state universe, which has no beginning or end in time.
British scientists Sir Hermann Bondi, Thomas Gold, and Sir Fred Hoyle first proposed the hypothesis in 1948. Hoyle expanded on it in order to address issues that had come up in relation to the alternative big-bang theory. According to the hypothesis, in order to maintain a constant average density of matter across time, the new matter must constantly be created, primarily as hydrogen. With nearly five times as much dark matter, the amount needed is small and not immediately observable: one solar mass of baryons per cubic megaparsec every year, or one hydrogen atom per cubic meter every billion years.
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Which of the following organisms reproduces asexually?
OA. Human
OB. Bacteria
C. Spider
D. Lobster
Answer:
OB. Bacteria
Explanation:
Bacteria reproduce through a process known as Binary Fission, which is an asexual reproduction by a separation of the bacteria into two new bodies.
Why does there need to be a concentration gradient across respiration surfaces?
A. So that oxygen can diffuse in, and carbon dioxide can diffuse out.
B. So that oxygen can diffuse out, and carbon dioxide can diffuse in.
C. So that there is no surface tension in the alveoli of the lungs.
D. So that there is surface tension in the alveoli of the lungs.
A concentration gradient across respiration surfaces is needed so that oxygen can diffuse in, and carbon dioxide can diffuse out; option A.
What is a concentration gradient?A concentration gradient is a difference in the concentration of molecule of substances across two regions or across a barrier.
A concentration gradient is necessary for diffusion of molecules of substances from one region to another.
Across respiratory surfaces, a concentration gradient is required in order for the gases to diffusion across the membranes from regions of high concentration to regions of lower concentration.
In conclusion, a concentration gradient is required for effective gaseous exchange across respiratory surfaces.
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the value of a reflex angle lies between
Answer:
reflex angle is an angle that measures more than 180 degrees and less than 360 degrees
Answer:
more then 180 degree and less then 360 degree
What is the function of estrogen in the menstrual cycle?
A. Causes ovulation.
B. Maintains the uterus lining.
OC. Causes the uterus to thicken.
D. Causes the egg to develop.
Reset Selection
Estrogen play two main functions such as prepare maturation of an egg to release during ovulation and thicken the lining of uterus. Thus all options are correct.
What is Estrogen Hormone?
It is a sex hormone released in the adrenal glands, ovaries and fatty tissue,
It is mainly involve in development of breasts in puberty and the growth of uterus lining during the menstrual cycle.
Regulation of menstrual cycle, growth of pubic and underarm hair, bone strength can be regulated.
There are three types of estrogen released from our body such as Estradiol (E2), Estriol (E3), Estrone (E1).
Estradiol is observed in women of childbearing age, estriol is produced during pregnancy where as estrone is released after menopause.
Thus all options are correct.
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The primary force responsible for air moving into the lungs during inhalation is _________________.
The primary force responsible for air moving into the lungs during inhalation is atmospheric pressure.
What happens during inhalation?Breathing or ventilation is the process of exchange of the gases between the lungs and the environment. This involves moving of air into (inhalation) and out (exhalation) from the lungs to bring in oxygen and flush out carbon dioxide respectively.This movement of air is due to pressure gradients (between the atmosphere and lungs) produced by the contraction of muscles of the diaphragm and thoracic cavity.Inspiration (inhalation) is the process of taking air into the lungs. This is an active process as it involves contraction of muscles. During inhalation, the diaphragm contracts due to which volume of thoracic cavity increases. This results in the decrease of intraalveolar pressure (inside lungs) as compared to atmospheric pressure. This creates a pressure gradient resulting in air flowing into the lungs. During exhalation, the diaphragm relaxes and air moves out of the lungs.Learn more about exhalation here:
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HELP ME Which property describes a mixture?
It cannot be separated by physical methods.
It has a single chemical composition.
It cannot have more than one state of matter.
It cannot be described by a chemical symbol or formula.
A mixture cannot be described by a chemical symbol or formula.
What is a mixture?A mixture is a substance that consists of 2 or more chemically different substances.
Examples of mixtures are sand and salt, water and kerosine, oil and water, etc.
Each substance in a mixture maintains its chemical identity. In other words, components of mixtures do not react with each other.
Thus, the components of mixtures can be recovered using relevant separation techniques.
Mixtures can be homogenous when the different components are uniformly distributed. They can also be heterogenous when the components are skewed to a specific side of the mixture.
Due to the fact that the chemical identity of the components of mixtures remains, it becomes impossible to assign a chemical symbol or formula to mixtures.
Therefore, mixtures can only be named according to the different components but cannot be assigned chemical symbols or formulas.
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Which of the following broad-based field of technical study prepares students for jobs requiring 21st-century knowledge and skills?
engineering
retail management
life sciences
STEM
STEM is a broad-based field of technical study that prepares students for jobs requiring 21st-century knowledge and skills.
What is STEM?STEM stands for Science Technology Engineering and Mathematics. STEM term is commonly used to deal with training policy or curriculum alternatives in faculties. It has implications for a team of worker's improvement, country-wide safety concerns, and immigration coverage. If we want a kingdom where our destiny leaders, acquaintances, and workers can apprehend and resolve a number of the complex challenges of today and day after today, and meet the needs of the dynamic and evolving team of workers, building college students' competencies, content expertise, and literacy in STEM fields is critical.
Thus from the above conclusion we can say that STEM is a broad-based field of technical study that prepares students for jobs requiring 21st-century knowledge and skills.
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Fill in the blank.
1. Helping children to evaluate and overcome frustrating situations is one way to prevent ________
2. Accepting and supporting a child fosters that child's __________
3. Giving a child a reason for a request helps to foster ________
and _______ .
4. When a caregiver sets limits so that children know what they can and can't do, the caregiver is
expressing ________
of the children's actions.
5. When a caregiver offers to help a child pick up blocks, the caregiver alts as a ________
of prosocial behavior.
6. Self-esteem is increased by ______________
a child's efforts.
Helping children to evaluate and overcome frustrating situations is one way to prevent aggression.
aggressionself-esteemself-esteem; self-regulationsupportmodelsupporting What are the methods used to help your child get control of their anger?A lot of people have no idea about social skills. We are known to often picked them as we grow up learn by observing people close to us such as out parents and in interactions with others.
A way that a child can manage their anger is for a parent to teach our children to be able to know and deal with their anger, as we can be able to prevent its negative effect before it occur.
Therefore, Helping children to evaluate and overcome frustrating situations is one way to prevent aggression.
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ANSWER QUICK WILL GIVE BRAINLIEST
After recent renovations to an office building, employees in the building begin complaining of nausea and burning in their eyes and throat. What type of exposure is most likely causing these reactions?
Lead
Asbestos
Pesticides
Formaldehyde
The correct answer is Formaldehyde.
Formaldehyde
Building materials such as particleboard, plywood, and other pressed-wood products contain formaldehyde, a colorless, pungent-smelling, combustible chemical that is generated industrially. It is additionally frequently utilized in morgues and medical labs as a preservative, fungicide, germicide, disinfectant, and preservative. Environmental sources of formaldehyde are also common. It is created during the natural chemical reactions that occur in most living things as well as during the decomposition of plant matter in soil. It can also be detected in tobacco smoke as a byproduct of combustion. Inhaling formaldehyde gas or vapor from the air or absorbing formaldehyde-containing substances via the skin are the two main ways that people are exposed.
ANSWER QUICK WILL GIVE BRAINLIEST
After recent renovations to an office building, employees in the building begin complaining of nausea and burning in their eyes and throat. What type of exposure is most likely causing these reactions?
Lead
Asbestos
Pesticides
Formaldehyde
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HELP QUICK PLS!!!
Part A: Explain why ATP is important in biochemical reactions.
Part B: How is ATP similar to a rechargeable battery? Explain in terms of structure and function.
A vital source of power for biological functions is ATP. From molecules like glucose, energy is transported to the intermediate energy source ATP. A ubiquitous intermediary in metabolism, ATP serves as a store of potential chemical energy and connects reactions that need and produce energy.
What is biochemical reaction?The chemical reactions that take place in living things and involve biomolecules are referred to as biochemical processes.To expedite most biochemical reactions, an enzyme is a type of biological catalyst. The amount of activation energy required for the reaction to start is decreased by enzymes. Most enzymes are proteins that only interact with one particular chemical, known as their substrate.Photosynthesis and cellular respiration involve some of the most significant biological processes. Nearly majority of the species on Earth receive their energy from these two processes combined.It is a science that combines biology and chemistry and is laboratory-based. Biochemists can comprehend and address biological issues by utilizing chemical understanding and methods.Learn more about biochemical reaction here:
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What is climate?
A.
rapidly changing and predictable patterns of temperature and precipitation worldwide
B.
long-term weather patterns in a specific location over many years
C.
short-term changes in atmospheric conditions in a specific location
D.
None of the above
Answer:
Climate is the long-term pattern of weather in a particular area. Weather can change from hour-to-hour, day-to-day, month-to-month or even year-to-year. A region's weather patterns, usually tracked for at least 30 years, are considered its climate
Explanation:
hope it will help you
Describe one or more of the scientific theories regarding the origin of life on the early Earth. Explain how RNA is important to this theory.
The RNA world is a hypothesis associated with the emergence of life on Earth and it is important because states that RNA had catalytic functions.
What is the RNA world?The RNA world is a scientific theory that states life began as primitive organisms in which the RNA played a dual function, i.e., as genetic material and as an enzyme.
The RNA world theory is sustained by the presence of ribozimes, i.e., enzymes composed of RNA instead of proteins.
In conclusion, the RNA world is a scientific hypothesis associated with the emergence of life on Earth and this theory is important because it states that RNA had catalytic functions.
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Which molecules are added to an electrophoresis buffer for the purpose of denaturing dna?
Formamide molecules are added to an electrophoresis buffer for the purpose of denaturing DNA.
What is the purpose of the buffer during electrophoresis?A laboratory procedure called electrophoresis is used to divide DNA, RNA, or protein molecules according to their size and electrical charge. The molecules are moved by an electric current through a gel or other matrix. In the case of Denaturing Gradient Gel Electrophoresis (DGGE), the gradient can be an electrical field or a denaturant such as a solution of urea and formamide.
Size, charge, and other characteristics are used in electrophoresis to separate macromolecules like protein and nucleic acids. Scientists utilize buffer to transport the charge through the gel for electrophoresis that separates by charge. Additionally, the buffer keeps the gel's pH steady, reducing alterations that would take place in the protein or nucleic acid if the pH were to become unstable.
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In your own words, explain the difference between the pitch and intensity of sound.
Answer:
The pitch of a sound is how high or low a sound is when we hear it, whereas the intensity of a sound is the energy/vibrancy of the sound over an area and depends on the frequency of the sound as well.
a sharp knife cuts more easily than the blunt ones. Give reason.
Answer:
A sharp knife can cut objects more easily compared to a blunt knife because a sharp knife applies more pressure on the object.
Removing a new cologne or bath product from the resident's room for your personal use is abuse
True/ false
Answer:
False
Explanation:
This might not even be considered stealing if the person removing the cologne puts it back but it is definitely not considered abuse which is where someone verbally or physically does harm to the victim.
Why are white-eyed female fruit flies so rare in nature?
A. White-eyed females are not rare.
B. The allele for white eyes was nearly removed from the gene pool.
C. Females must inherit two copies of the recessive allele.
White-eyed female fruit flies so rarely in nature because females must inherit two copies of the recessive allele. Therefore, option C is correct.
Why are white-eyed female fruit flies so rare in nature?The gene for eye color in fruit flies is located on the X chromosome, and there are two possible alleles: one for red eyes (dominant) and one for white eyes (recessive).
Male fruit flies have only one X chromosome, so if they inherit the white-eyed allele, they will have white eyes. However, females have two X chromosomes, so they must inherit two copies of the white-eyed allele to have white eyes.
Because the white-eyed allele is recessive, it is much less common than the red-eyed allele in the gene pool. In nature, white-eyed female fruit flies are rare because they must inherit two copies of the recessive allele from both parents. Thus, option C is correct.
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If you added 1 ml of an aqueous solution of NaCl at 0.4 mol/l to 9 ml of water, what would be the final concentration of NaCl in the solution?
Taking into account the definition of dilution, the final concentration of NaCl in the solution is 0.04 mol/L.
DilutionWhen it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.
Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentrationVi: initial volumeCf: final concentrationVf: final volumeFinal concentrationIn this case, you know:
Ci= 0.4 mol/LVi= 1 mLCf= ?Vf= 1 mL of aqueous solution of NaCl + 9 mL of water= 10 mL solutionReplacing in the definition of dilution:
0.4 mol/L × 1 mL= Cf× 10 mL
Solving:
(0.4 mol/L × 1 mL)÷ 10 mL= Cf
0.04 mol/L= Vf
In summary, the final concentration of NaCl in the solution is 0.04 mol/L.
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What is a scientific explanation of a law?
A. an idea that can't be proven but can explain some phenomena
B. a statement based on repeated experiments and observation that can predict what will happen
C. an educated hypothesis that is supported with evidence
D. a hypothesis that can be tested
Answer:
It is B
Explanation:
A statement based on repeated experiments and observation that can predict what will happen
a scientific explanation of a law is a statement based on repeated experiments and observation that can predict what will happen. Hence option B is correct.
What is Law in Physics ?Scientific laws, often known as rules of science, are assertions that explain or predict a variety of natural events based on repeated tests or observations. In several circumstances (approximate, exact, wide, or limited), the term law is used differently across all domains of natural science (physics, chemistry, astronomy, geoscience, biology). Laws are derived from facts and can be further refined through mathematics; in all cases, they are founded on empirical evidence, either directly or indirectly. It is widely assumed that they implicitly reflect, though do not overtly claim, underlying causal linkages in reality and are found rather than constructed.
Physics laws are, by definition, stated facts that have been inferred and drawn from empirical data. Simply said, the world around us operates in a specific manner, and physical laws are a means of categorizing that operation.
Hence option B is correct.
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Which theory is most widely accepted in describing the formation of our universe?
the Big Bang Theory
the Singularity Theory
the Steady State Universe
che Eternal Inflation Theory
Answer:
The Big Bang Theory.
Explanation:
The Big Bang Theory is the most widely accepted hypothesis for the origin of the universe as we know it. It's implications are somewhat vague, as there is no concrete way to determine what really happened to create our universe, but it still holds water.
The basics of the Big Bang Theory is that a singularity was formed, a very small ball with infinite density and unimaginable heat. This singularity's expansion is what created the universe, essentially, a big bang.
Bona has started reaction to the sound of a loud POP.immediatly before the loud pop,a light flashes, after several times,bona has started reaction to the flash of light.
A,what us UCS?
B, what is CR?
C,what is NS
D,what is UCR?
The Unconditioned stimulus (UCS) is the light flashes.
The conditioned response(CR) is reaction to flash of light.
The neutral stimulus(NS) is sound of a loud POP before conditioning.
The Unconditioned response(UCR) is reaction to the sound of a loud POP.
What is theory of learning?The theory of learning is defined as the various way individuals are able to receive and retain information for future purposes.
The different theory of learning include the following:
classical conditioningoperant conditioningCognitive learningSocial learning.The classical conditioning was by Russian physiologist, Ivan Pavlov.
Ivan Pavlov believed that learning process creates a conditioned response through associations between an unconditioned stimulus and a neutral stimulus.
Therefore from the experience of Bona:
The Unconditioned stimulus (UCS) is the light flashes.The conditioned response(CR) is reaction to flash of light.The neutral stimulus(NS) is sound of a loud POP before conditioning.The Unconditioned response(UCR) is reaction to the sound of a loud POP.Learn more about classical conditioning here:
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WILL GIVE BRAINLIEST
Ant species work together to collect food and build the mounds they live within. This behavior increases the species'
biotic potential
reproductive strategies
intraspecific competition
individual behavior
Ant species work together to collect food and build the mounds they live within. This behavior increases the species' biotic potential
The ability of ant species to maximize the utilization of their social activity as a means of bringing in resources is the key to their success "explained Wild. "They have created communication systems that allow for quick communication. That explains why you have a lot of ants at your picnic.
The maximum number of individuals a species may produce is known as its "biotic potential." This is and has always been a defense mechanism against food scarcity, predators, and parasites, just like it is for other creatures. Most organisms are unable to reach their full biotic potential because optimum environmental conditions rarely occur in reality.
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