Natural selection is usually defined as the process by which forms of life having traits that better enable them to adapt to specific environmental pressures, as predators, changes in climate, or competition for food of mates, will tend to survive and reproduce in greater number than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations. Charles Darwin and Alfred Wallace developed the theory of evolution by natural selection and jointly presented papers on the subject in 1858. It is based on the finding that some distinctions between people in a group can be passed down across generations. Darwinism, or Darwin's theory, is a theory of evolution created by Charles Darwin stating that all life forms arise, change and develop from a process of natural selection. Natural selection is the process of changes in evolution due to the survival of certain individuals in a species. It is one of the most important parts of the theory of evolution. Darwin's idea provided a straightforward yet persuasive explanation for the diversity of species on Earth. Because various locations have distinct circumstances and survival possibilities, natural selection selects the organisms that are best adapted to that particular environment.
In each generation, the wings of experimental fruit flies were clipped short for fifty generations. The fifty-first generation was born with normal-length wings. This observation would tend to disprove the idea that evolution is based on
N an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. The fifty-first generation emerged with normal-length wings. This observation would tend to disprove the idea that evolution is based on
a. inheritance of natural variations
b. inheritance of acquired characteristics
c. natural selection
d. survival of the fittest
Inheritance of acquired characteristics. Thus, option "B" is correct.
What is inheritance of acquired characteristics?For fifty generations wings of fruit flies were clipped. Hence they acquired this trait in their lifetime and not genetically. If acquired characteristics were capable of passing on to next generation, 50 generations would have been enough to inculcate this clipped wing trait in fruit flies. Despite it, the fifty-first generation did not have clipped wings.
Hence evolution can not occur without genetic variation. A character simply acquired in a lifetime does not create a difference in germ cells and hence is not enough to be passed on to next generation or cause evolution
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Which factor is MOST likely to have contributed to the high fertility rate in Africa?
A-many Economic opportunities
B-poor access to medical care
C-high rate of education
D-Lack of access to food
Answer:
The answer is B. Poor access to medical care
Poor access to medical care is most likely to have contributed to the high fertility rate in Africa. Option B is correct.
Fertility rate is the average number of children that a woman will have in her lifetime. In Africa, the fertility rate is high, meaning that women on average have more children than in other parts of the world. There are many factors that contribute to high fertility rates, but one of the most important is poor access to medical care.
When women do not have access to contraception, they are more likely to become pregnant. They are also more likely to die in childbirth if they do not have access to medical care. In many parts of Africa, girls are married off at a young age. This means that they start having children at a young age, which can lead to higher fertility rates.
In some cultures, it is seen as desirable for women to have many children. This can also contribute to high fertility rates. In some parts of Africa, there are few economic opportunities for women. This can make it difficult for women to support themselves and their children, which can lead to higher fertility rates. Option B is correct.
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How can you explain/describe the inheritance the trait of armor? How might this challenge our understanding of dominance?
These explain/describe the inheritance the trait of armor might this challenge our understanding of dominance by The developments are encoded with the aid of using one-of-a-kind alleles of the identical gene.
What are traits?Traits are bodily determined functions of an organism. Each allele is chargeable for a selected phenotype that makes up a trait. A dominant trait is the only one that is expressed over any other in a heterozygous kingdom i.e. the mixed kingdom of the 2 one-of-a-kind alleles that encodes the 2 one of kind developments respectively.
When the 2 one of a kind alleles integrate withinside the organism's genotype, the dominant trait (hornless) will specific itself over its contrasting trait (horn),The allele that encodes hornless-ness is stated to be the dominant allele at the same time as hornless-ness is the dominant trait.
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In cats with the Manx Trait, the M allele causes a short or absent tail, whereas the m allele confers a normal, long tail. Cate of genotype MM die as embryos. If two Manx cats mate, what is the probability that each living kitten has an long tail?
Answer:
2/3
Explanation:
Offspring are :
- MM
- Mm
- Mm
- mm
Now, it mentions living kitten.
Hence, they will be :
- Mm
- Mm
- mm
Out of the 3, 2 will have a long tail.
Hence :
P (long tail) = 2/3
All of the following are advantages of preserving biodiversity except:
a.
many food sources for humans
b.
a variety of genetic information
c.
extinct organisms come back to life
d.
possible sources for new medicines
Answer:
without the possibility of nutritious food
Answer:
[tex]\huge\boxed{\sf Option \ C}[/tex]
Explanation:
Extinct organisms:Organisms that no longer exist are called extinct organisms.Extinct organisms can never come back to life since the last of their species is dead and not even one of its species is alive.
[tex]\rule[225]{225}{2}[/tex]
What is the molarity of a 17 ml solution used to prepare 65 ml of 2.4 M
solution?
Answer:
goo khao eat some stool hahaha
What kind of organ is this? And what structures are seen?
Answer: Liver.
Explanation:
Chronic Passive Congestion.
If one side of the DNA ladder contains the following bases, what would the complementary base pairs be for each?
Answer: The complimentary base pairs would be:
a. TATCTGAATCGG
b. CTGTAAGTGACC
c. CGTTATGAACCG
d. TATCGATGGCAT
e. CAGGGTACGTTC
Explanation:
A combines with T and vice versa.
Similarly G combines with C and vice versa.
How would our interaction with the suns energy differ if our magnetosphere disappeared?
Answer:
Enveloping our planet and protecting us from the fury of the Sun is a giant bubble of magnetism called the magnetosphere. It deflects most of the solar material sweeping towards us from our star at 1 million miles per hour or more. Without the magnetosphere, the relentless action of these solar particles could strip the Earth of its protective layers, which shield us from the Sun’s ultraviolet radiation. It’s clear that this magnetic bubble was key to helping Earth develop into a habitable planet.
Two related populations separated by a mountain range for many generations eventually become different species providing an example of what type of speciation
Two related populations separated by a mountain range for many generations eventually become different species is an example of Allopatric type of speciation.
What is Allopatric speciation?Allopatric speciation is a type of speciation that occurs when a species separates into two separate groups which are isolated by a physical barrier from one another.
So we can conclude that two related populations separated by a mountain range for many generations eventually become different species is an example of Allopatric type of speciation.
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fill in the blank blank factors depend on the number of organisms in a given area
Answer:
5 because those organisms multipliy or expand
Arrange the level of cell organization from the simplest to the most complex, with 1 being the simplest and 5 being the most complex. 1. 1 organism level 2. 2 system level 3. 3 tissue level 4. 4 organ level 5. 5 cellular level
Answer:
1. Cellular level
2. Tissue level
3. Organ level
4. System level
5. Organism level
Explanation:
what is the result of hydrogenation of vegetable oils
Answer:
Explanation:
Since the process of hydrogenation contributes hydrogen atoms to oil, this will reduce the amount of fatty acids and increase the amount of saturated fatty acids in the oil.
the 5’ end of the dna molecule is considered ____, while the 3’ end of the dna molecule is considered the _____
The 5’ end of the dna molecule is considered five prime, while the 3’ end of the dna molecule is considered the three prime.
Thus, The backbones of DNA's two long polymers of basic units, known as nucleotides, are comprised of sugars and phosphate groups that are connected by ester bonds.
These two strands are anti-parallel because they move in the opposite directions of one another. Each sugar has one of four different nucleobases (bases) molecules attached to it.
The genetic code is made up of the order of these bases, and it subsequently dictates the order of the amino acids in proteins. The 5′ (five prime) and 3′ (three prime) ends of DNA strands are referred to as the ends.
Thus, The 5’ end of the dna molecule is considered five prime, while the 3’ end of the dna molecule is considered the three prime.
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photo has the question in it please say which answer it is :)
Answer:
Pretty sure its 2 peaks and a trough.
Explanation:
This is because most traits aee common but only a few traits, like blue eyes are rare
Please Help No Random Answers.
Jeff has 10 grams of water and 10 grams of vegetable oil in separate containers. Both liquids have a temperature of 24°C. Jeff heats both liquids over a flame for five minutes. When he’s finished, he discovers that the temperature of the oil increased more than the temperature of the water. What can Jeff conclude from this experiment?
The temperature of the oil increased more than the temperature of the water because vegetable oil has a lower heat capacity than water.
Heat capacity is the ratio of heat absorbed to temperature change by a material. Typically, it is stated in terms of calories per degree. Oil can hold more heat than water. Compared to water, oil can be heated to high temperatures more quickly with a significantly lower energy input because it has a lower heat capacity than water..Oil transfers heat to food more gradually to a fixed temperature than water does. Oil can be heated to a higher temperature than water when it is in a liquid state.Hence, the correct option is D.
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Which of the following changes to Earth is NOT caused by living organisms?
Answer:
is C, since cars and other non-living organisms release sulphur dioxide into the atmosphere
What do the polar bears, reindeer, and shrubs that live in a single area make up?
organism
population
community
ecosystem
Answer:
population
Explanation:
The polar bears, reindeer, and shrubs that live in a single area make up a community. The correct option is C, a community.
What is a community?
In ecology, a community refers to a group of different species that coexist and interact within a particular area or habitat.It represents the interconnected network of species that inhabit a particular area.It includes all the living organisms, such as plants, animals, and microorganisms, that inhabit a specific ecosystem.The structure and composition of a community can be influenced by factors such as resource availability, environmental conditions, and species interactions.The polar bears, reindeer, and shrubs are distinct species that share the same geographical area and have the potential to interact with one another. They form a community within that ecosystem. It is important to note that a community does not include abiotic factors, such as soil, water, and climate, which collectively form an ecosystem.
So, the correct option is C.
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Lawmakers discuss methods of preventing pollutants that could directly start a positive feedback loop in the area shown in the picture.
Which of these actions should they take?
A. Pass laws to help decrease soil erosion and fertilizer runoff.
B. Ban the composting of food waste and paper products.
C. Increase funding for coal and natural gas technology.
D. Regulate the number of jets flying in the upper troposphere.
Answer:
D. Regulate the number of jets flying in the upper troposphere.
What does this symbol indicate on a weather map?
A. A stationary front
B. A cold front
C. A warm front
D. An occluded front
Answer:
C
Explanation:
Is a symbol..............
what is science? explain in brief
Answer:
Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence
Explanation:
Scientific methodology includes the following: Objective observation: Measurement and data (possibly although not necessarily using mathematics as a tool) Evidence.
How do development within each domain is linked to and affected by development in other domain.
Question 18 of 25
Which of these natural events is most likely to cause a primary disturbance in
an ecosystem?
A. Immigration of an invasive species
OB. Extended drought
OC. Tropical storm
OD. Volcanic eruption
what the difference between saturated and unsaturated
Answer:
Saturated fast are solid at room temperature, unsaturated fats are a liquid at room temperature.
Explanation:
Saturated fast are solid at room temperature and unsaturated fats are a liquid at room temperature. The reason is because in saturated fats there are no double bond between carbon atoms, this gives them their solid structure .
Unsaturated fats have one or more double bonds between carbon atoms, this gives them their liquid form.
(a)
Producers
(b)
Plants like cacti store their water in large
(a)mesenchyma tissue
(b)Collenchyma tissues
(c)Parenchyma tissues (d) epidermal tissue
Answer:
What is your question?
An object moving at a constant velocity will always have a
negative displacement
negative acceleration
zero acceleration
zero displacement
Answer:
zero acceleration
Explanation:
hope I helped
Answer:
zero acceleration
Explanation:
I have it confirmed
hope it helps :-)
Chlorophyll is found in the thylakoid which are found in chloroplast
Write a proposed reaction for the oxidation-reduction of copper (II) iodide. Justify the choice of the substance that reduces the copper, based on the fact that a precipitate forms when copper nitrate and potassium iodide react, even though solubility rules would contradict this fact. Also, justify the choice using the atomic structure of potassium ion and iodide ion.
2Cu2^+ + 2I^- ----> 2Cu^+ + I2
The reaction performed in the experiment is;
2 Cu(NO3)2 + 4 KI → 2 CuI (s) + 4 KNO3 + I2
What is redox reaction?A reaction that happens when an oxidizing substance and a reducing substance come into contact. In the reaction, the reducing substance obtains electrons while the oxidizing substance loses electrons.
The precipitate results from the reduction of Cu2+ by iodide ions to Cu+, which is insoluble in water. Iodine is a good oxidizing agent, and since its outermost shell must be filled with one electron, this is why. On the other hand, because it may quickly lose its one electron, potassium makes a good reducing agent.
The oxidation - reduction equation is as follows;
2Cu2^+ + 2e ----> 2Cu^+ reduction half equation
2I^- ----> I2 + 2e. Oxidation half equation
Balanced redox reaction equation;
2Cu2^+ + 2I^- ----> 2Cu^+ + I2
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Explanation:
The proposed reaction for the oxidation-reduction of copper (II) iodide is as follows:
2 CuI + Cl₂ → 2 CuCl + I₂
The substance that reduces copper in this reaction is chlorine gas (Cl₂). Chlorine is capable of oxidizing iodide ions (I⁻) to form iodine (I₂), while itself getting reduced to chloride ions (Cl⁻).
Justification based on the formation of a precipitate:
When copper nitrate (Cu(NO₃)₂) and potassium iodide (KI) react, a precipitate of copper (II) iodide (CuI₂) forms, even though it contradicts the solubility rules. According to the solubility rules, most iodides are soluble, including potassium iodide. Copper (II) compounds are also typically soluble. However, in this specific reaction, the formation of a precipitate suggests that a redox reaction is taking place.
Justification based on atomic structure:
The atomic structure of the potassium ion (K⁺) and iodide ion (I⁻) provides further insight into the choice of chlorine as the reducing agent. Chlorine has a higher electronegativity than iodine, making it more capable of accepting electrons. When chlorine reacts with iodide ions, it gains electrons and gets reduced. The potassium ion, on the other hand, has a lower electronegativity than iodine. Therefore, it is less likely to accept electrons and participate in the reduction of copper ions.
In SummaryOverall, based on the fact that a precipitate forms when copper nitrate and potassium iodide react, along with the atomic structure of potassium and iodide ions, it is evident that chlorine gas is the substance that reduces copper (II) iodide in the proposed reaction.
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Why did Mendel study pea plants?
Answer:
He chose peas because they had been used for similar studies, are easy to grow and can be sown each year.
Explanation:
I just saw the answer on the website :)
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please help!
thank you
Estrogen and chlorine move by diffusion, nitrogen move by transport protein whereas glyphosphate moves by active transport.
How give molecules move through cell membrane?Estrogen move across the cell membrane through simple diffusion because it needs no ATP molecule for its movement while on the other hand, glyphosphate use active transport for the movement across cell membrane because they only move when the ATP is available.
Nitrogen moves into the cell membrane of the lung cell through facilitated diffusion by transport proteins while on the other hand, the hydrogen ions moves into the cell membrane of the cell through active transport.
The chlorine ion moves from higher concentration region to lower concentration region by simple diffusion process.
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