The bacteria which had mutation became resistant to the antibiotic and survived and keeps on increasing, promoting natural selection.
Explanation:
The bacteria rapidly divide, the chances of mutation in the gene increases manifold.
The strains of bacteria causing tuberculosis and staph infection got mutated at DNA level such that they became resistant to antibiotics when tested those susceptible did not survive. These mutations were not harmful to bacteria and the resultant bacteria survived.
These bacteria which survived and proliferated as the environment was in their favour.
Thus, Darwin's Theory of Natural Selection is acceptable here as it says if a mutation is occurring towards the increase in population, they will be selected ones.
How big is the rare earth market expected to grow?
4 While surveying his apple trees, a farmer discovers a particular tree that produces apples with perfect size, color, and flavor. To reproduce this plant, he removes a twig from the tree and attaches it to the stem and root system of a growing apple tree in a process called grafting. The tree will continue to grow and will later produce apples. Why does he use this method instead of planting an apple seed from the tree with ideal apples? A.
The twig contains the genetic material of the parent tree and will eventually produce identical apples.
B.
The apple seed will grow into a tree that is not identical to the parent tree.
C.
The apple seed contains a mixture of genetic material from two trees.
D.
all of these This is on study island
Answer:
I think it is C
Explanation:
Hope it helps
using the development of reflecting telescopes as an example , explain how scientific inquiry leads to advances in technology
Answer:
A scientific inquiry can be described as the different ways in which scientists tend to study about the phenomenons occurring in the natural world.
To make advances in scientific inquiries, scientists have to come forward with better technologies than the past to get a better understanding of the events occurring in the natural world.
For example, the telescope was the technology designed by Galileo in 1609 for astronomical observations. The reflecting telescope was designed by Newton in 1668 which was far better than Galileo's telescope and could make better observations.
The development of reflecting telescopes, initially driven by the need for more accurate astronomical observations, showcases how scientific inquiry spurs technological advances.
The development of reflecting telescopes is a prime example of how scientific inquiry leads to technological advances.Reflecting telescopes, which use mirrors to gather and focus light, were developed to overcome the limitations of earlier refracting telescopes, which suffered from chromatic aberration.This advancement in telescope design was driven by the need for clearer and more accurate astronomical observations.Early scientists, such as Isaac Newton, applied principles of optics to develop the first reflecting telescopes in the 17th century.This improved technology allowed astronomers to observe celestial objects with unprecedented clarity and detail, leading to new discoveries about the universe.Over time, further improvements in materials and engineering enabled the construction of even larger and more powerful telescopes, such as the Hubble Space Telescope, which has vastly expanded our understanding of the cosmos.The process exemplifies how new technologies can provide researchers with better tools for observation, subsequently leading to new evidence and the revision of existing scientific theories. As each technological enhancement opens new avenues for exploration, it propels science forward, perpetually fostering discovery and innovation.4 rooms
What must be true for natural selection to happen?
O
A. The system must not be in Hardy-Weinberg equilibrium.
O
B. The population must be below carrying capacity.
O
C. All organisms must have the same alleles.
O
D. There can be no competition for resources,
Answer:
Answer: there must be genetic variation in the population
Explanation:
A PEX
For natural selection to happen, the system must not be in Hardy-Weinberg equilibrium. This means that there must be variation in the population, and that the frequency of alleles in the population must be changing over time.
What is Hardy-Weinberg equilibrium?Additionally, the variation in the population must be heritable, meaning that it can be passed on to offspring. This allows certain traits to be passed on more frequently than others, leading to changes in the population over time.
Competition for resources is actually an important driver of natural selection, as it leads to differential survival and reproduction based on traits that are advantageous in obtaining resources.
The population size and carrying capacity may also play a role in natural selection, but they are not essential requirements for it to occur.
All organisms having the same alleles is not possible in a natural population due to mutations, genetic drift, and gene flow, and it would actually limit the potential for natural selection to occur.
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An octopus reproduces only once in its life, but it may have more than 100,000 offspring, depending on the species. Certain species of penguin, by contrast, have only one chick at a time. If some species can reproduce as rapidly as the octopus (100,000 offspring every 3 or 4 years), how is it possible that a species that has only one young at a time is equally successful?
A.
Having a large number of offspring assures that at least some of them will escape being killed by predators.
B.
An octopus only reproduces one time, but penguins may reproduce between 4 and 12 times in their lives.
C.
Baby penguins are left to fend for themselves from the time they hatch, so they quickly become self-sufficient.
D.
The success of a species depends on the number of offspring that survive long enough to reproduce.
Answer:B
Explanation:
An octopus only reproduces one time, but penguins may reproduce between 4 and 12 times in their lives.
C.
Baby penguins are left to fend for themselves from the time they hatch, so they quickly become self-sufficient.
D.
The success of a species depends on the number of offspring that survive long enough to reproduce.
Answer:
D
Explanation:
I got this exact same question on Study Island.
"The success of a species depends on the number of offspring that survive long enough to reproduce, not just the number of offspring produced at a time or even in a lifetime. A penguin who has only one young can devote a lot of time, attention, and care to it, greatly increasing its chances of surviving long enough for it, too, to reproduce. An octopus, on the other hand, usually dies shortly after reproducing. A young octopus has no parent to protect or teach it, so the vast majority of octopi do not survive long enough to reproduce." -Study Island
Hope this helps :D
Which aspect of this source should make the reader question its credibility?
A. It is not written by an authority.
B. It is not published in a major city.
C. It was not written recently.
D. It is a peer-reviewed journal.
Answer:
The correct option is A) It is not written by an authority
Explanation:
In the English language, credibility can be described as the quality of an object to be reliable or trusted.
A piece of written work which does not mention the name of the writer may be considered to be not reliable and trustworthy. Hence, the correct option is A.
Other options, like option D, is not correct because a peer- reviewed journal carries authentic information as the work has been rechecked by different people who have expertise on the subject.
What is the main purpose of the Ramsar convention?
Answer:
The main purpose Ramsar Convention is to protect and preserve the wetlands.
Explanation:
Ramsar in a location in Iran.In 1971, an international treaty was signed for the protection, conservation, and use of wetlands in a sustainable manner.Wetlands are water filled area having diverse population of plants and animal species. They in rich in both the aquatic and terrestrial plant and animal species.In order to protect these biological hotspots the Ramsar Convention Treaty was signed.Answer: wetlands
Explanation:
A phospholipid is chemically similar to a fat molecule. Briefly explain how it is different.
Answer:
A fat molecule comprises of a glycerol backbone and three fatty acid tails.
The structure of phospholipids comprise of two fatty acid tails instead of three. The third carbon of the glycerol backbone is attached to a phosphate molecule. The phosphate molecule is absent in the structure of a fat molecule.
compare a cat arm to a human arm in form
Explanation:
The difference between the human hand and that of the cat are uses of the appendage and the size and number of certain bones. The human arm is used for a variety of functions while the lizard's and the cat's are used for walking an climbing,
Final answer:
The human arm and the cat's forelimb share a similar bone structure with a humerus, radius, and ulna, pointing to a common evolutionary ancestor. Their functions differ, with human arms optimized for manipulation and cat forelimbs for locomotion.
Explanation:
Comparing the forelimbs of a cat to the human arm reveals significant anatomical similarities. Both contain a single upper bone known as the humerus, and two lower bones, the radius and ulna. Additionally, both limbs include carpals (wrist bones), metacarpals (hand bones in humans, paw bones in cats), and phalanges (fingers in humans, toes in cats). These structural similarities point to a common evolutionary ancestor. However, the functions of these limbs differ; the human arm is adapted primarily for manipulation and complex movements, while the cat's forelimb is adapted for walking, running, and climbing.
The bones of mammals like humans, cats, and whales all follow this basic design, indicating homologous structures that have evolved over time to perform different functions in different species. For example, the human arm is used for throwing, whereas the cat's forelimb is for locomotion, and the whale's flipper is for swimming. The construction of these body parts is controlled by Hox cluster genes, further underscoring their shared biological heritage.
Water vapor will change state from
energy has been removed,
__to
a t 100 °C when heat
OA) solid; gas
OB) gas; solid
O C) gas; liquid
OD) liquid; gas
Answer: C) gas; liquid
Explanation: There are three states of matter: solid, liquid and gas. Water can exist in these three states. Water is a liquid but when heat energy is applied to it, the temperature rises until it reaches its boiling point where it begins to boil and as water boils, it changes to gaseous state i.e., it turns to vapor. When heat is removed, the temperature decreases and the vapor condenses to liquid and if the heat removal continues, the temperature continues to drop until it reaches its freezing temperature (0°C) where it changes from the liquid to ice (the solid state).
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MEIOSIS
Meiotic
Division 1
DNA
Replication
and Recombination
Cell
Division 1
Meiotic
Division 2
00:00:43
Cell
Division 2
OD ODS
ÓÓÓÓ
At the end of meiosis II, how does the DNA in each of the four new cells compare to the DNA from the original cell?
Answer:
Meiosis is known as the reduction division. It produces four haploid (n) gametes containing only one chromatid from each chromosome. Therefore, at the end of meiosis 2, the number of chromosomes is half that of the original cell.
Explanation:
Following is a summary of the events of meiosis:
Interphase:
Prepares the cell for division. Duplication of DNA, duplication of centrioles occurs and the cell grows in size. At this stage the cell is diploid (2n).
Prophase 1:
First stage of Meiosis 1.The centrioles move to the poles of the cell, the nuclear membrane disintegrates, homologous chromosomes pair up (in the form of tetrad), form a chiasmata and then exchange segments of chromosomes with each other. This process is called crossing over.
Metaphase 1:
Involves the arrangement of the crossed over, homologous chromosomes on the metaphase plate which is sort of like a web of spindle fibers that originates from the centrioles.
Anaphase 1:
The tetrads arranged on the metaphase plate are pulled apart by the spindle fibers. This is the result of tension that build up in the spindle fibers as they grow towards opposite poles.
Telophase 1:
The last stage of meiosis 1. Involves the arrival of the chromosomes at the poles, the nuclear membrane starts to form and the chromosomes start decondensing. Telophase 1 yields 2 daughter cells with half the number of chromosomes as that in the parent cell.
Meiosis 2:
Meiosis 2 is exactly similar to mitosis. The only difference is that the haploid cells entering meiosis 2 do not duplicate their DNA. Meiosis 2 just involves the separation of the sister chromatids of homologous chromosomes.
As mentioned above, interphase does not occur before meiosis 2.
Prophase 2 involves the disintegration of nuclear envelope, centrosomes start moving to the poles.
Metaphase 2 arranges the chromosomes on metaphase plate.
Anaphase 2 separates the sister chromatids from the chromosomes.
Telophase 2 develops the nuclear envelope and separates the nuclei of the daughter cells into 2. Nuclear division id followed by cytokinesis (division of cytoplasm). Telophase 2 result sin 4 haploid daughter cells with one chromatid from each chromosome.
[CM.02] The diagram below shows the movement of energy in the water cycle.
Diagram showing the movement of energy in the water cycle. There are three boxes and six arrows that appear in the following order: box labeled '?,' one arrow pointing to a box labeled 'Land,' arrow pointing to a box labeled 'Ocean,' and arrow leading back to the box labeled '?.' As well, there are two arrows pointing from the 'Land' box back to the '?' box, and one arrow pointing from the '?' box back to the 'Ocean' box.
Which term best fits in the empty cell of the diagram?
water vapor
evaporation
transpiration
atmosphere
Answer:
Atmosphere
Explanation:
The water cycle classifies the water reservoir as a surface or atmosphere. Water on the surface can be a lake, river or soil. This water will flow to the ocean, where it can easily get evaporated into water vapor.
Water on the atmosphere is not only water vapor, but it can also be snow or cloud so option A is wrong. Another option is describing the process that moves the water to different reservoir.
Which statement describes the outer planets
Answer:
the outer planets are primarily composed of gasses. also the outer planets are considerably bigger than the inner ones
Answer:
Outer planets are called gas giants. Outer planets have a high gravity.
Explanation:
Explain why a rock pocket mouse color influence its overall fitness. Remember that "fitness" is defined by an organisms ability to survive and produce offspring in its environment
Answer:
The rock pocket mice rely on their fur color for camouflage. So, on the tan sand more light colored mice will survive because they blend in and on the dark lava rock more dark colored mice will survive and the allele for dark fur will be passed on to their offspring
Owing to the definition of fitness as being an organism's ability to survive in an environment, the fact that the color of pocket mouse aligns or blends with the color of their niche protects them from predation.
Rock pocket mouse lives in environments which conceals their presence. This is achieved by staying in areas where their fur color blends with the habitat. Hence, concealing their existence or presence. Light colored pocket mouse lives on light colored rocks while dark colored species lives on dark lavas. This keeps them safe from predators.Therefore, pocket mouse select their living area based on their color in other to conceal their presence and keep them safe, hence, increasing their fitness level.
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the difference of the biomes of Kansas city and denver
Answer:
Answer: If you compare them, Denver has a much colder climate
Explanation:
Explanation:
A biologist conducted an experiment to determine the rate at which DNA mutations occur. The biologist was careful to record the steps of her experiment, as well as her observations and results. What should the biologist do next?
A.
Report her results in a scientific journal.
B.
Ask the local newspaper to publish her results.
C.
Hide her results from other scientists so that they won't steal her idea.
D.
Come up with a new hypothesis that she can test.
A. Report her results in a scientific journal - should be the action that the biologist should do next
Explanation:
Once conducting an experiment a biologist or a scientist should record the values, observations and inferences correctly because science requires construction of all data, facts, values, explanations, observations, and predictions that are observed and evidenced.
Research findings are published in a scientific journal because the research findings are stored, saved and can easily be referred for future reference.
This will be evaluated by other academicians and scientists and can be compared with past results to value the achievements made by the current researcher. This will also give way for future prospects in the research.
This will add academic credibility to both the biologist and her institute. When presented in a literature form, this can be accessed by scientists, academicians, peers and others to refer and cite valuable information in their research.
Others can use the findings to help with advancements of the research in the same topic. It gives an immense feeling for the biologist or any researcher to see his/her work being published on a recognized journal and will encourage to work more.
1. Where do T-cells reach maturity?
A. bone marrow
C. thymus
B. tonsils
D. lymph nodes
T-cells reach maturity in the Thymus
Explanation:
The thymus is a lymphoid organ located in front of the heart and behind the sternum. The progenitors of T-cells are produced in the bone marrow in a process called hematopoiesis. They then migrate to the thymus where they mature and develop their specific antigenicity. Only about 20% of the progenitor T-cells mature. The rest mainly get destroyed by apoptosis.
Learn More:
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In watermelons, solid green rind color (G) is dominant to stripes (g).
A farmer crosses two watermelon plants that are heterozygous for rind color.
What are the odds that the offspring will have solid green rinds?
There are chances of 75% solid green coloured rind in watermelons.
Explanation:
Dominant trait = Solid Green rind G
Recessive trait= stripes g
Given that both the parent plants are heterozygous so their alleles will be
Gg Gg
From the Punnet square
G g
G GG Gg
g Gg gg
The phenotype ratio is 3:1 ( 3 watermelons with the green colour rind and 1 with striped rind observed)
Genotype ratio is 1:2:1
From the observation, we can say that 75% of the watermelons will have solid green colour rind because G is dominant over g.
The probability that offspring of two heterozygous watermelon plants for rind color will have solid green rinds is 3/4 or 75%, following a 3:1 ratio characteristic of a monohybrid cross with a dominant and recessive trait.
The question concerns a cross between two heterozygous watermelon plants for the rind color trait, where solid green rind color (G) is dominant over stripes (g). To determine the odds that the offspring will have solid green rinds, we must consider the possible genotypes that the offspring could inherit. With both parents being heterozyous (Gg), the potential genotypes of the offspring, according to the Punnett square, include GG, Gg, and gg. When these are combined, there is a 3:1 ratio favoring the dominant phenotype. The proportion of offspring with the solid green phenotype (either GG or Gg) is therefore 3/4 or 75%, meaning there's a 75% chance that an offspring will have solid green rinds. This calculation follows the monohybrid cross pattern, where the probability of an offspring displaying a dominant trait is the sum of the probabilities of being homozygous dominant (GG) or heterozygous (Gg).
which activity might a scientist do as part of the scientific process? apex
A.) Make a testable hypothesis
B.) Hide experimental data
C.) Make unsupported claims
D.) Answer ethical questions
15. How can molecular clock data help us in the battle against infectious disease?
Meus
Answer:
Molecular clock can be described as a technique which scientists use for determining when two life forms might have diverged based on the mutation rate which occurs in biomolecules.
Molecular clocks can be used against infectious diseases because the infection causing agents such as bacteria or viruses contain DNA and RNA. Mutations constantly arise in these infectious agents at the time of their replication. Molecular clocks can help us to sequence different infections and check how similar and different they are to each other. Based on the similarities and differences we can determine the time of the disease and its treatment.
Percentage of
Trees Remaining
2010
2015
2020
2025
2030
2035
Year
What would a graph of oxygen production look like for this forested area?
O
A. Aline that is increasing
O
B. A line that is decreasing
O
C. A line that is leveling out
O
D. A line that is slowly rising
Answer:
Percentage of
Trees Remaining
2010
2015
2020
2025
2030
2035
Year
What would a graph of oxygen production look like for this forested area?
A line that is increasing
Explanation:
It is an established fact by scientist that availability of trees increases oxygen rate in an environment. From the above question, the increase in number of trees as allotted by increase in years reflect an increase in oxygen available. Trees makes use of carbondioxide exhale by humans while humans make use of oxygen exhale by trees.
Which state of a dead body is caused by the lack of adenosine triphosphate (ATP) to the muscles?
Answer:
the elipsophre state
Explanation:
this is when the muscles and skine start to spoil
Lack of interaction with social and cultural environments transforms people into members of society.
Please select the best answer from the choices provided
OT
OF
Lack of interaction with social and cultural environments transforms people into members of society is a false statement.
Explanation:
Socialization which involves social interaction of people with each other will help transform themselves into active members of society.
The way we interact and project ourselves to our friends, relatives, parents, teachers, colleagues, neighbors and others grades our socialization process.
Knowing about the social and cultural environment of society and interacting with others based on that knowledge will help an individual to interact closely with other people and hence will transform to being a member of that society.
People who are less or unsocialized, self-interested shows a lack of interest in knowing the social and cultural environment of others and hence would not be successful in socializing.
Socialization process helps to change the status of an individual from “I” to “me”. The “me” part understands the values, expectations, and rules of a society and hence interacts socially to become a member of society.
In areas where kelp is abundant, sea urchins can be found. If sea otters live in the same ecosystem as the sea urchins, the equilibrium of the kelp forest can be maintained. Based on the food chain, how is the kelp equilibrium MOST likely maintained?
Answer:
There needs to be enough sea urchins for otters to come and there needs to be enough otters to eat the urchins.
Explanation:
How did people acquired immunity to a disease before the development of vaccines
Answer:
Exposure to the disease
Explanation:
Before vaccines, the only way to develop immunity to a disease was to be exposed to the disease-causing pathogen without being harmed by it. A good example of this is smallpox, which was also the first vaccine developed. It was noticed that milk maids weren't catching and dying from small pox like everyone else, because they had been exposed to cowpox. This premise was used to create the first vaccine.
Vaccines give you immunity by injecting you with a small amount of a (usually inactive) pathogen. inside your body. This means your immune system produces antibodies against it. Similar to what happened with the milkmaids.
Lucy plans to buy a refrigerator. She wants a large model so it has enough space for all the food she needs to store so that she takes fewer trips to the grocery store. Lucy also wants a refrigerator that does not use too much electricity. However, when she goes to the appliance store, she finds that larger refrigerators use more energy. Which statement best explains why there is NO perfect solution for Lucy's
a. Lucy cannot choose the values of the variables.
b. The two variables have to be calculated.
c. There is a trade-off between the two variables.
d. Lucy does not know which variable is more important.
Answer:
D) there is a trade of between the two variables
Explanation:
this makes more sense
What product produced by yeast cells during fermentation causes bread to rise?
lactic acid
carbon dioxide
glucose
ethyl alcohol
Answer:
answer is carbon dioxide its correct
Answer:
carbon dioxide
Explanation:
Hermione's possible genotypes are MMss or MM'ss. What are possible genotypes of Hermione's parents who are muggles?
MM'Ss or MMSs are the possible genotype of Hermione's parents.
Explanation:
Muggles have a gene for magic but not expressed in them, S represents silencing, s is no silencing).
If Hermione's genotype is MMss or MM'ss
then Hermione's parents would have Ss (but did not express S in Hermione and parents were heterozygous)
Hermione's parents could have M' M alleles but M' could or could not have appear in this case
so parents genotype are
MM'Ss or MMSs
It can be checked by crossing the possible genotype of parents
M M' s S
M MM MM' s ss Ss thus Hermione has this possible combination
M MM MM' S Ss SS as MMss , MM'ss
List 3 imperfections of the vertebrate eye?
Answer:
Favors random changes (retinal tear)/ nerve cells in front of retina
Explanation:
i could only say 2 i dont know the other one.
Final answer:
Three imperfections of the vertebrate eye include the presence of a blind spot, variability in visual acuity and sensitivity among different species, and astigmatism as a vision defect.
Explanation:
Three imperfections of the vertebrate eye are the presence of a blind spot, variability in visual acuity and sensitivity among different species, and the occurrence of astigmatism as a vision defect.
The blind spot is caused by the positioning of nerve cells and blood vessels in front of the light-sensitive cells of the retina. This design flaw is a result of the evolutionary path that led to the vertebrate eye.
Visual acuity and sensitivity differ among species based on their ecological niches. For example, eagles have a higher visual acuity than humans due to their specialized life-style.
Astigmatism is an unevenness or asymmetry in the focus of the eye, resulting in elongated or blurry images. It can be caused by irregularities in the cornea, lens, or retina.
These are the 13 different species of birds that are related in the Galapagos islands
Answer:
Darwin's finches
Explanation:
Darwin's finches are the 13 different species of bird which he observed on the Galapagos island during his voyage on the H.M.S Beagle. The study of these finches helped Darwin to propose the phenomenon of natural selection. According to Darwin, the 13 different types of finches arose because of the different modes of nutrition for the birds located on each island. Through natural selection, those traits evolved which made the species more adaptable to live on the particular island