Answer:
it is D
Explanation:
As scientists began investigating living things and their cellular structure they developed a set of principles that are now known as the cell theory
The statements below summarize cell theory
• All living things are made up of cells.
Cells are the basic units of structure and function in living things
• New cells are produced from existing cells.
Daniel proposes that if scientists continue to gather evidence in support of the cell theory, they eventually should reclassify the theory as a law of
cells. Which statement is the most useful evaluation of Daniel's proposal?
A The proposal is reasonable, because theories often are reclassified as laws when the evidence is overwhelming
B. The proposal is reasonable, although only rarely is enough evidence gathered to reclassify theories as laws
C.The proposal is not reasonable because scientists have discovered too many exceptions to the cell theory to state it as a law.
D. The proposal is not reasonable, because a theory is never reclassified as a law, nor is a law reclassified as a theory,
Answer:
D.
Explanation:
The proposal is not reasonable, because a theory is never reclassified as a law, nor is a law reclassified as a theory (Option D).
What are scientific theories?Scientific theories are scientifically sound explanations that were progressively tested and verified.
Scientific theories can be used to predict certain outcomes related to such explanations.In conclusion, the proposal is not reasonable, because a theory is never reclassified as a law, nor is a law reclassified as a theory (Option D).
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How does energy produced in the core of the Sun reach the surface? How long does it take?
Answer: energy produced in the core travels through out the gases of Sun and takes about million years to reach its surface
Explanation:
PLS ANSWER DUE LATER!!
Answer: Ok so for the first one pipette aid, pipette tips, standard/ladder, samples with dye, ethidium bromide, plastic pipette, gel box, and gel box aid. <--- These are the ingredients Ok now to answer the second question: Why do you need to use a buffer? Ok answer: Buffer is a solution that can resist pH change upon the addition of an acidic or basic components. For the FINAL QUESTION!!!! I can't answer why you need a microwave but Yes you can use something else such as the oven!
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Which of the following is a secondary consumer in the food web shown above?
A.
duck
B.
algae
C.
earthworm
D.
grasshopper
In a food web, ducks would be considered secondary consumers, since they feed on primary consumers like grasshoppers.
Explanation:In a food web, organisms are classified into different levels based on their feeding behavior. The first level constitutes producers which photosynthesize to produce their own food, such as algae and grass. The second level comprises primary consumers, which consume producers. Grasshoppers and earthworms fall in this category as they feed on plant material. The third level, known as secondary consumers, consists of animals that eat primary consumers. Therefore, in the options provided, the duck would be a secondary consumer as it feeds on other animals like grasshoppers (primary consumers).
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What are the conditions required for natural selection? Check all that apply.
Final answer:
Natural selection occurs when there is variation of traits among individuals, competition for resources, and overproduction of offspring. These conditions enable individuals with advantageous traits to have a better chance of surviving and reproducing, leading to evolutionary changes in the population over generations.
Explanation:
Conditions Required for Natural Selection
Natural selection is a critical mechanism in evolutionary biology. According to Darwin, populations evolve through natural selection when specific conditions are met. These conditions include:
Variation of traits among individuals within a population.Competition for limited resources.Production of more offspring than can survive (overproduction).Natural selection favors individuals who are better adapted to their environment, meaning those with traits that give them a survival or reproductive advantage are more likely to pass on their genes to the next generation. This condition-based process gradually leads to population-wide changes over generations.
The concept of genetic equilibrium, such as in the Hardy-Weinberg equilibrium, describes a situation where a population's genetic makeup is not changing over time. This occurs when there is:
No mutationNo migrationA very large population sizeRandom matingNo natural selectionIn reality, natural selection disrupts genetic equilibrium by ensuring that those with advantageous traits have a higher chance of survival and reproduction than those without such traits, thereby changing the genetic makeup of the population over time.
which of the following statements about geothermal energy is not true? a. it is not a practical source of energy b. it is an important source of energy in volcanically active areas
c. it works best when the magma pool is near the surface of earth
d. it is a renewable source of energy
Geothermal energy is a practical, renewable energy source that works best when magma pools are close to the Earth's surface. Contrary to the false statement, it is most effective in volcanically active areas.
Explanation:In assessing the statements about geothermal energy, the untrue statement is: a. it is not a practical source of energy. In reality, geothermal energy is highly practical, particularly in regions where volcanic activity or other heat sources exist near the Earth's surface. Geothermal energy is a renewable source of energy because it is constantly replenished by the heat generated by the Earth's core. This heat is used to produce steam, which then powers turbines to generate electricity. Geothermal energy works best when the magma, or molten rock, pool is close to the Earth's surface, making statement c is also correct. Therefore, geothermal energy is not only a practical source of energy, but it is also renewable and advantageous in certain geographical settings, particularly those that are volcanically active (statement b).
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Many birds live in mountainous temperate forest ecosystems. Above the tree line on mountains, however, the ecosystems change. Few birds are found there. Many factors contribute to the lower number of birds see above a mountain’s tree line. Which of these factors is abiotic?
a.) high-flying predators
b.) limited food
c.) frequent high winds
d.) no trees for shelter
Answer:
C. Frequent high winds
What organism in the ocean absorbs the most carbon dioxide
1. Algae and marine plants
2. Ocean mammals, like whales and dolphins
3. Fish
4. Coral
Answer:
in my opinion it's coral
Answer:
Algae and marine plants
Explanation:
HELP PLZ GOD BLESS YOU AND YOUR GRADES
Answer:
The third and second is the correct!
Explanation:
For example, cooling water will cause it to become ice.
As for the second one, if you heat up liquid, the particles move faster, causing the liquid to evaporate and become a gas
Hope i helped! :3
had a brain fart, sorry, i fixed it
In order for altruism to be possible, there must be __________ to conceive of another’s emotional state, and __________, which allows you to see a situation from another viewpoint.
A.
perspective . . . empathy
B.
understanding . . . empathy
C.
empathy . . . perspective
D.
trust . . . perspective
Answer:
C
Explanation:
For the first blank, we need to find a word whose definition is essentially "to conceive of another's emotional state", and for the second blank, we need to find a word whose definition is "allows you to see a situation from another viewpoint".
Let's define all the words given:
- "perspective": one's way of viewing something - basically, your viewpoint of a certain issue
- "empathy": being able to understand another's emotions
- "understanding": comprehending another's situation or the issue at hand
- "trust": the assurance that you can rely on a person when you're in need
Out of all these, only "empathy" fits the first blank and only "perspective" fits the second. So, C is correct.
Answer: C.
Explanation:
Definitions for the set of words:
Perspective: A point of view
Understanding: the ability to comprehend.
Empathy: the ability to understand another's feelings.
Trust: faith in another person or thing.
Although understanding fits the first blank, empathy is more descriptive of emotions in particular.
Perspective in the context of emotions allows you to feel from a different point of view.
Trust and understanding are somewhat unrelated to the question posed.
How do the muscles connect and work with the bones?
What are the primary functions of the musculoskeletal system?
What is one example of homeostasis between the musculoskeletal system and the digestive system?
Answer:
The first answer could be with ligaments
Help!
A species of cactus has two alleles for the length of its spines: long spines
(L) and short spines (). The Punnett square below predicts the outcome of a
cross between two cacti, one LL and the other Ll for length of spines.
What phenotype ratio should be observed in the offspring of this cross?
Answer: 4 : 0 (long spines to short spines)
Explanation:
Dominant allele: L
Recessive allele: l
When is there at least one dominant allele in the phenotype it shows the dominant trait (long spines)
There has to be two recessive alleles to make the phenotype the recessive trait (short spines).
Therefore since there is one L in every box, all of the offspring will show the dominant trait (long spines).
Hope that helps!
Which components do all circuits have in common? Select three options.
energy source
voltmeter
wires
ammeter
device that needs electrical energy
Answer:
-energy source
-wires
-device that needs electrical energy
Explanation:
just did it on edg2020
An electric circuit is a loop network that provides a path for the flow of electric current. All circuits have an energy source, wires, and device that needs electrical energy in common.
What is an electric circuit?An electric circuit is a path for the transmission of electric current. It includes a device that gives energy to a charged particle that constitutes the current.
There are usually the following components of an electric circuit:
A conductive path that includes wires.An electrical power or energy source.A load is needed to operate electric power.Device that requires electrical energy.Thus, the correct options are A, C, and D.
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is the science of naming and classifying organisms based on structural comparisons and genetic evidence
Answer:
usually yes
Explanation:
Taxonomy is the science of naming and classifying organisms based on structural and genetic evidence. It's a critical component of biology, helping to organize the evolutionary history of organisms. The modern taxonomic systems use genetic methods for a more precise classification.
Explanation:Introduction to TaxonomyTaxonomy is the science of naming and classifying organisms based on structural comparisons and genetic evidence. Swedish botanist Carolus Linnaeus was a key figure in the establishment of this system.
The Science of TaxonomyTaxonomy is a critical component of biological studies. It helps organize humans and their evolutionary ancestors, both spatially and temporally. Two types of evidence focused on in taxonomy are morphologic (form and function) and genetic.
Modern Taxonomy: The Role of GeneticsIn the modern era, genetic methods have become a standardized way to compare all living organisms, providing a more defined and accurate classification system. These methods have become integral to the science of taxonomy.
Similarities and Differences: Homologous StructuresOrganisms that share similar physical features and genomes are usually more closely related. Such overlapping features, known as homologous structures, stem from developmental similarities that are based on evolution.
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If you were in charge of making the decision ||
to help clean up the city's polluted water,
would you make laws to reduce the use of
chemicals, schedule cleanups, or stop all use
of chemicals?
Answer:
If I were in charge of making the decision to help clean up the city's polluted water, I'll stop all the use of chemicals because I think that the chemicals have the biggest effect on water pollution.
It is useful to carry out planned cleanups. The farmers will need to grow more crops, which can be difficult, but it will help them know when not to grow their crops.
How to prevent the city from water pollution?In order to prevent and manage water pollution and to maintain or restore the country's water wholesomeness, the Water (Prevention and Control of Pollution) Act was passed in 1974. In 1988, the Act was modified.
To supply their communities with clean drinking water, public drinking water systems employ a variety of water treatment techniques. Coagulation, flocculation, sedimentation, filtration, and disinfection are common water treatment processes used in public water systems.
Therefore, making laws to reduce the use of chemicals, schedule cleanups, or stop all use of chemicals is helpful to prevent water from getting polluted.
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A male is homozygous dominant for being smart and heterozygous for not being attractive. Attractiveness is a recessive trait. What would be the outcome of mixing alleles with a heterozygous female for both intelligence and attractiveness.
What percent of their offspring will be totally heterozygous?
What percent of the offspring will be attractive and smart?
What is the phenotype ratio?
Answer:
50%
Explanation:
A male is purebred dominant for being smart (SS) and heterozygous for not being attractive (Aa), and attractiveness is a recessive trait, and genotype of heterozygous female for both intelligence and attractiveness (SsAa), will produce offspring that will be totally heterozygous(SsAa) is 1/4. the offspring will be attractive and smart is (SSaa) 1/8. Phenotype ratio is 2 are smart and attractive: 6 are smart and not attractive .
what is genotype and phenotype?The genotype of a male individual, which is homozygous dominant for being smart (SS) and heterozygous for not being attractive (Aa). The information that attractiveness is a recessive trait, which means that an individual needs to have two copies of the recessive allele (aa) to show the trait.The female individual is heterozygous for both traits, which means that she has one dominant and one recessive allele for each trait (SsAa).
Hence, male is purebred dominant for being smart (SS) and heterozygous for not being attractive (Aa), and attractiveness is a recessive trait, and genotype of heterozygous female for both intelligence and attractiveness (SsAa), will produce offspring that will be totally heterozygous(SsAa) is 1/4. the offspring will be attractive and smart is (SSaa) 1/8. Phenotype ratio is 2 are smart and attractive: 6 are smart and not attractive .
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Which is not present on the moon?
light
atmosphere
heat
Ogravity
Answer:Atmosphere
Explanation:
Moon is smaller in size than earth and hence, has very low force of gravity. Moon does not have atmosphere as its weaker force of gravity can not hold the atmosphere. Any present atmosphere on moon would have stripped away by strong solar wind. The weaker magnetic field of moon is one more reason for absence of atmosphere.
Answer: Atmosphere
Explanation: Moon is smaller in size than earth and hence, has very low force of gravity. Moon does not have atmosphere as its weaker force of gravity can not hold the atmosphere. Any present atmosphere on moon would have stripped away by strong solar wind. The weaker magnetic field of moon is one more reason for absence of atmosphere.
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Which is the first part of the immune system to attack an invader?
O
A. B cells
B. Macrophages
O
O
C. Lysozymes
O
D. T cells
Answer:
b
Explanation:
Nitrogen fixing bacteria participate in the nitrogen cycle mainly by
Using the dichotomous key above, what is the scientific name of this animal?
Question 16 options:
Danaus plexippus
Sciurus carolinensis
Alces alces
Answer:
Danaus plexippus is a scientific name of monarch butterfly. It is also known as simply monarch.
Explanation:
Actually the question is not that much clear. I think u meant this answer..
The scientific name was proposed by Carl Linnaeus as binomial nomenclature.
What is a scientific name?A scientific name is a universally accepted unique name that consists of a genus name followed by a specific epithet.
What is a dichotomous key?A dichotomous key is a method where the characteristics are asked and two choices are provided repeatedly.
What organisms have these scientific names?Danaus plexippus- This is the scientific name of the monarch butterfly.
Sciurus carolinensis- This is the scientific name of the eastern gray squirrel.
Alces alces- This is the scientific name of moose or elk.
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What is necessary for a recessive X-linked allele to be expressed in females?
Both of the female's parents would've had to give her a recessive X chromosome in order for the allele to be expressed.
Final answer:
A female needs two copies of a recessive X-linked allele to express the associated trait, receiving one from each parent. Carrier females possess one mutant allele and one dominant allele, potentially exhibiting mild symptoms due to X chromosome inactivation.
Explanation:
For a recessive X-linked allele to be expressed in females, they must inherit two copies of the allele, one from each parent. If a female inherits just one recessive X-linked allele, she will be a carrier of the trait, but typically unaffected. This phenomenon is due to the fact that females have two X chromosomes, enabling them to carry a recessive allele without expressing the trait, provided their other X chromosome carries a dominant allele. However, carrier females have a chance of manifesting mild forms of the trait because of the random inactivation of one X chromosome in each cell, which could lead to cells expressing the recessive allele.
Examples of human sex-linked disorders include red-green color blindness and hemophilia. Males, who have only one X chromosome, will express the trait if they inherit one mutant X allele. In contrast, females must receive one recessive allele from each parent. As a result, X-linked recessive traits are more frequently seen in males than in females.
Brainliest!! Extra points!!! PLEASE ANSWER both QUESTIONS PLEASE!!
Answer:
It's c (13)
12 is Freezing
Explanation:
Radioactivity is a property of which of the following minerals?
a boron
b uraninite
c barium
d aluminium
Answer:
uraninite
Explanation:
Where would sound travel the slowest? fast answers!
Question 3 options:
In the pine forests of Georgia
At the North Pole
In New York City
At the equator
What must first occur for transcription to begin?
A: mRNA moves the code from the nucleus to the ribosome for protein production.
B:Agene is expressed through protein production.
C:RNA polymerase attaches to the promoter.
D:A repressor protein must attach to the operator.
Transcription begins when RNA polymerase binds to the promoter of the gene. It then works to assemble RNA nucleotides into a strand that complements the DNA template, till it reaches a termination sequence.
Explanation:For transcription to begin in a cell, the first thing that needs to occur is that RNA polymerase attaches itself to the promoter of the gene. The promoter is a specific DNA sequence that indicates where the process of transcription should start. The RNA polymerase is an enzyme that carries out the process of transcription, forming a new mRNA molecule by reading the DNA strand.
Steps involved in the process of TranscriptionThe RNA polymerase binds to the promoter region of the DNA.It separates the two strands of the DNA molecule.The RNA polymerase starts to assemble RNA nucleotides into a strand that is complementary to the DNA template.The process continues until it reaches a termination sequence in the DNA, which signals to the RNA polymerase to stop transcription and release the newly formed mRNA molecule.Learn more about Transcription here:https://brainly.com/question/32921071
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what variations beside color can you think of that make a difference in a plant survival?
Variations which make difference in plants are its color, shape, size, environment, and surrounding atmosphere.
What are Variations?Variations can be defined as any kind of difference between the two individuals in a species or the groups of organisms of any species or organisms. Mutations in the genetic material is the ultimate source of variation, however the mechanisms such as sexual reproduction and gene flow contribute to variation as well.
The variations other than color of the plant which can make a difference in a planet survival are its shape, size, environment, and surroundings. These variations are responsible for the different life cycles in plant species.
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can some one help me
Answer: Kaylan
Explanation: Pesticides can contaminate soil, water, turf, and other vegetation. In addition to killing insects or weeds, pesticides can be toxic to a host of other organisms including birds, fish, beneficial insects, and non-target plants. Which makes it harmful towards the environment.
A scientist follows this procedure to test whether plants have been performing photosynthesis. Place Plant X in a dark closet and Plant Y on a sunny windowsill. Wait several days, then remove a leaf from each plant. Boil leaves in alcohol to remove the chlorophyll. Add a chemical indicator that detects sugars. (Dark purple = sugars are present; dark orange = sugars are not present) What results will the scientist most likely obtain when placing drops of the indicator on the leaves?
1: Plant X: dark purple Plant Y: dark purple
2: Plant X: dark orange Plant Y: dark purple
3: Plant X: dark orange Plant Y: dark orange
4: Plant X: dark purple Plant Y: dark orange
Answer:
2. Plant X: dark orange, Plant Y: dark purple
Explanation:
Two plants; plants X and Y were used in this experiment. Photosynthesis is the process by which green plants synthesize their food (sugar). Plants make use of the energy they capture from sunlight via their Chlorophyll pigment to power the photosynthetic process. Plants cannot perform the process of photosynthesis in the absence of sunlight i.e. No sunlight, No photosynthesis and ultimately no sugar.
In the case of this experiment, Plant X was placed in a dark closet while Plant Y was placed on a sunny windowsill. Due to the absence of light in the dark closet, plant X will be unable to photosynthesize and produce sugars while plant Y, due to its exposure to ample sunlight, would be able to produce sugars in its leaves via photosynthesis.
Therefore, since dark purple = sugars are present and dark orange = sugars are not present when tested with a chemical indicator, plant X's leaf will give a dark orange color because it produced no sugars in its leaves as it was unable to photosynthesize. Plant Y's leaf will give a dark purple color because it produced sugar in its leaves as a result of photosynthesis.
Plant X, which was placed in a dark closet, will not have performed photosynthesis and will not have produced sugars. Plant Y, which was placed on a sunny windowsill, will have performed photosynthesis and will have produced sugars. Therefore, the leaves of Plant X will turn dark orange and the leaves of Plant Y will turn dark purple when the chemical indicator is applied. Hence option 2 is correct.
The leaves of a plant that has been performing photosynthesis will contain sugars. These sugars can be detected using a chemical indicator that changes color in the presence of sugars.
In the experiment described, the scientist is using a chemical indicator that turns dark purple in the presence of sugars. Therefore, the leaves of Plant Y, which have been performing photosynthesis and contain sugars, will turn dark purple when the chemical indicator is applied.
The leaves of Plant X, which have not been performing photosynthesis and do not contain sugars, will turn dark orange when the chemical indicator is applied.
Therefore, option 2 is correct.
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What part of an animal's body contains prokaryotic cells under normal conditions?
A. the heart
B. the lungs
C. the digestive system
D. no part
Answer:
D no part
Explanation:
The body only has eukaryotic cells!
Explain how a global dependence on fossil fuels can lead to international security risks.
Answer:
A global dependence on fossil fuels will cause an increase in demands for fossil fuels without an increase in the availability of the resource. ... As demand increases, the costs of fossil fuels increases.
Explanation:
Global dependence on fossil fuels will cause an increase in demands for fossil fuels without an increase in the availability of the resource.
As demand increases, the costs of fossil fuels increases.
How a global dependence on fossil fuels can lead to international security risks?The greater demand for fossil fuels with decreasing supplies could lead to an increase in competitive action over limited resources.
Thus, Global dependence on fossil fuels will cause an increase in demands for fossil fuels without an increase in the availability of the resource.
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