Which scenario MOST LIKELY represents genetic drift and why?
A. Scenario 1, because chance events led to a decrease in the number of dark beetles.
B. Scenario 2, because chance events led to a decrease in the number of light beetles.
C. Scenario 1, because the light beetles are most fit for the environment.
D. Scenario 2, because the dark beetles are most fit for the environment.
Answers
Answer:
A
Explanation:
The hurricane was by chance and genetic drift is about chance
Scenario 1, because chance events led to a decrease in the number of dark beetles. The correct option is A.
What is genetic drift?Genetic drift is a random process that can result in changes in allele frequency in a population over time.
In Scenario 1, random events reduced the number of dark beetles, implying that the frequency of the dark allele in the population decreased.
Natural selection or other factors that would have favored light beetles over dark beetles did not cause this decrease in frequency.
The dark beetles were affected more than the light beetles due to chance events such as random mortality or reproduction.
This is a classic example of genetic drift, in which random events cause changes in allele frequencies over time in a population.
Thus, the correct option is A.
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Related Questions
In bunnies long ears are dominant over short ears. If two heterozygous bunnies are crossed, what is the probability their offspring will have the long ear phenotype? 1. 25% 2. 50% 3. 75% 4. 100%
Answers
Answer: 75%
Explanation:
See my picture for my work. Use a punnett square.
Answer: 75%
Explanation:
Heterozygous means that one allele would be dominant, and the other would be recessive. I will use B for the dominant allele, and b for the recessive allele.
Next, create a Punnett square (look at the pic).
To make the Punnett square, draw a 2 × 2 table. Put Bb on the top (one over each column) and Bb on the left side (one next to each row). Cross multiply. Remember to always put the dominant allele (in this case, B) in front of the recessive allele (in this case, b). The dominant allele will always be exhibited in the organism. So, the answer is 75%, since 3/4 of the different combinations of alleles is long ears.
PLEASE HELP! i inserted a pic will give brainliest if right
Answers
Why are humans dependent on healthy ecosystems throughout the world?
Answers
Answer: Human health ultimately depends upon ecosystem products and services (such as availability of fresh water, food and fuel sources) which are requisite for good human health and productive livelihoods. Significant direct human health impacts can occur if ecosystem services are no longer adequate to meet social needs.
Explanation:
Humans are dependent on healthy ecosystems as they provide resources, regulate climate, purify water, control diseases, offer recreational and cultural values, and drive economic activities.
For a number of reasons, functioning ecosystems are essential to human existence. supplying resources Healthy ecosystems offer vital resources like food, fresh water, clean air, and building supplies like fibre and wood. These materials provide for our basic necessities and are essential to our survival. Genetic and biological diversity: Numerous plant and animal species are supported by ecosystems, which increase biodiversity. Ecosystem stability is ensured by biodiversity, which also increases resilience to environmental changes and offers genetic diversity. The creation of novel foods, medicines, and other useful goods depends on this diversity.
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Which statements describe the characteristics of an individual protein? Select two options.
It is specific to one biochemical reaction.
It increases the activation energy needed for a reaction.
It can catalyze many different reactions.
It increases the rate of a biochemical reaction.
It slows down the rate of a biochemical reaction.
Answers
Answer:
A, D
Explanation:
I just took the test on edge
Answer:
The answer to this car is A.)It is specific to one biochemical reaction, D.)It increases the rate of a biochemical reaction.
Explanation:
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PLEASE HELP!!
What is noise that is made up of many different frequencies called?
white noise
colored noise
Answers
Answer:
Explanation:True white noise is a mixture of all the frequencies humans can hear, from about 20 Hz to 20,000 Hz, all going at equal strength at the same time.
Answer:
white noise
Explanation:
When crossing over take places chromsomes
A.
Decrease in number
B. Produce new genes
C. mutate in the first division D. exchange segment of DNA
Answers
Answer: D
Explanation:
Crossing over refers to homologous chrosmomes exchanging DNA which creates variation of chromsoomes that are inheried by offspring.
Tendonitis causes the tendon to become ___.
a.
weaker.
c.
elastic.
b.
inflamed.
d.
none of the above.
Answers
Answer:
inflamed
Explanation:
Answer:
b. inflamed
Explanation:
DNA replicates in the
nucleus cytoplasm
endoplasmic reticulum
cell membrane
where does it replicate?
Answers
Answer:
Nucleus
DNA replication happens in the nucleus of human cells. It will also take place within mitochondrial matrix.
Explanation:
DNA replication occurs during the S-stage of interphase. DNA replication (DNA amplification) can also be performed in vitro (artificially, outside a cell). DNA polymerases isolated from cells and artificial DNA primers can be used to start DNA synthesis at known sequences in a template DNA molecule.
About:
In molecular biology, DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. DNA replication occurs in all living organisms acting as the most essential part for biological inheritance.
DNA replication takes place in the nucleus of the cell. Thus, the correct option for this question is A.
What is DNA replication?DNA replication may be defined as the process through which the genomic DNA successfully gets copied into cells during the mechanism of cell division. It is a process of creating two identical replicas of DNA from one original DNA molecule.
According to the context of this question, the process of DNA replication takes place during the S-phase of interphase. During this phase, the amont of genetic content doubles in the cell which is then separated into daughter cells equally followed by cytokinesis.
Therefore, DNA replication takes place in the nucleus of the cell. Thus, the correct option for this question is A.
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Radiation is a method of thermal energy transfer that moves-
Helppplp plss I’ll choose as brainliest
Answers
Answer:
-heat
Explanation:
Radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else. This is how the heat from the Sun gets to Earth. In fact, all hot things radiate heat to cooler things. When the heat waves hits the cooler thing, they make the molecules of the cooler object speed up.
Good luck!!
Answer:
Explanation:
Radiation is a method of heat transfer that does not rely upon any contact between the heat source and the heated object as is the case with conduction and convection. Heat can be transmitted through empty space by thermal radiation often called infrared radiation. This is a type electromagnetic radiation .
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What is inside an animal cell?
Answers
Answer:
Nucleus, vaculoe, cytoplasm, cell membrane
thats all I can remember
Answer:
Nucleus,cytoplasm, endoplasmic reticullum,ribosome,mitochondria,Gollgi complex,Vacoule and lysosome.
Explanation:
Nucleus - controls cell activities, contains the DNA for the cell.
Cytoplasm - supports and protects all cellular organelles.
Endoplasmic Reticulum - aids in making proteins, carries materials through the cell.
Ribosome - synthesizes proteins.
Mitochondria - breaks down sugar molecules to release energy, site of aerobic cellular respiration.
Golgi Complex - modifies proteins made by the cell, package and export proteins.
Vacuole - store food, water, metabolic, and toxic waste.
Lysosome - break down old cell parts, break down larger food molecules into smaller pieces.
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The halfway point of development is about 20 weeks. Is the average baby half of its full birth length at 20 weeks?
Answers
What type mutation are most harmful to an organism
Answers
Answer:
type 1
Explanation:
Because an insertion or deletion results in a frame-shift that changes the reading of subsequent codons and, therefore, alters the entire amino acid sequence that follows the mutation, insertions and deletions are usually more harmful than a substitution in which only a single amino acid is altered.
Which of the following is NOT true about homeostasis?
A - Maintaining homeostasis requires that all body systems work together.
B - Long periods of stress can disrupt homeostasis.
C - Body temperature is a factor of homeostasis.
D - Only the nervous and endocrine systems are involved in maintaining homeostasis.
Answers
This is a picture of a coordinate graph.
Which ordered pair describes a point that is located 4 units to the left of the origin and 6 units below the x-axis?
(4, −6)
(6, −4)
(−4, −6)
(−6, −4)
Answers
Answer:
This is not biology.
What is the difference between natural selection and selective breeding? Then, give examples of natural selection and selective breeding?
Answers
Natural Selection is when traits are "naturally" selected for, because "survival of the fitttest." Example would be a species becoming bigger over time, because the smaller animals of that species were more likely to be eaten by predators. Natural selection is when the "best" trats are passed down due to chance
Selective breeding is if an outside forece (like a dog breeder) "chooses" a triat to be passed down. Example, instead of breeding a brown dog with a white dog, the breeder breeds two black dogs together in orer for the litter to all have black fur
Which action has the most harmful impact on the environment?
A. Reusing a steel water bottle at a water fountain
B. Buying a new plastic water bottle and throwing it away
C. Drinking directly from a water fountain or from a sink
D. Using a disposable paper cup to get water from your sink
Answers
Buying a new plastic water bottle and throwing it away has the most harmful impact on the environment. Thus, the correct option is B.
What is BPA?Hard plastics, such drinking water bottles and numerous home objects, contain the chemical BPA. According to research, BPA exposure can cause the endocrine system to malfunction. However, the average person's daily exposure levels are unlikely to cause substantial harm.
Using non-BPA-free water bottles and failing to properly dispose of them in a trash can would be the activity that would have the most detrimental effects on the environment.
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PLEASE HELP (50 POINTS)
Choose 1-3 activities that you perform regularly and explain the role(s) that each organ system plays in each activity, as well as explain how organ systems work together to perform the chosen activities.
Examples of activities students might choose:
• Arts (drawing/painting, dance or music performance, acting)
• Athletics (exercises/workout routines, sports)
• Food/Culinary-related (cooking, eating different cuisines)
• Other hobbies (video games/TV)
• Other student choices?
Connections with your chosen activities may be:
• Direct – How are your chosen activities directly controlled/performed by different organ systems and processes in the body?
• Analogies – How are your chosen activities similar/analogous to different organ systems and processes in the body?
Answers
Athletics would be the easiest choice here
Sports are an active that takes up a lot of different organ systems. When running I use my muscular system and cardiovascular system the most. The cardiovascular system directly controls running because it helps prevent me from getting tired and worn out faster.
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What is the name of the topic that we are covering?
Body Systems
Genetics
Evolution
Cells
Answers
13. How does the protein p53 act as a negative regulator?
Answers
Answer:
The major negative regulator of p53 is the Mdm2 proto-oncogene. Mdm2 is transcriptionally induced by p53, thus p53 triggers its own destruction through a negative feedback loop. This feedback loop leads to oscillations in the expression of both proteins following DNA damage.
Explanation:
What kind of intermediate inheritance is being exhibited by the chickens???
Answers
In the investigation of oxygen dynamics in E. chlorotica cultures,
gross photosynthesis is reported after seven months in culture, even
in the apparent absence of oxygen production.
Which statement provides the best reasoning to explain this
observation?
A. The oxygen produced in photosynthesis is used in cellular respiration.
B. Photosynthesis can be sustained in the absence of oxygen production.
C. The plastids store oxygen for use in photosynthesis.
D. The ability to carry out photosynthesis is transferred from the
chloroplast to the mitochondria.
Answers
Answer:A
Explanation: Teacher gave me the answer
Why is Gene Therapy considered an effective (helpful) method to treat genetic disorders?
A) It enables a diseased cell to self-correct and fix its own defective (non-working
gene
B) It increases the likelihood (chance) of passing genetic mutations to offspring
C) It replicates resistance genes in the cells of unhealthy individuals
D) It replaces a defective gene with a healthy gene
Answers
Answer:
D) It replaces a defective gene with a healthy gene
Explanation:
Gene therapy is the process of replacing defective genes with healthy ... genes to help the body fight or treat disease, or deactivating problem genes.
Environmentalists are monitoring an area of tropical forest that is being
deforested because of human activities. The graph here shows the scientists'
predictions based on the data they have collected.
Tropical Forest Deforestation
100
100
80
80
70
60
53
Percentage of
Trees Remaining
40
20
10
0
2010
2015
2020
2025
2030
2035
Year
How is the ecosystem likely to change as a result? Select the two correct
answers.
Answers
Answer:
its 100
Explanation:
The ecosystem is likely to change as a result of Loss of habitat and Decrease in biodiversity. The correct options are C and D.
What is the meaning of ecosystem?It is biological system is a geographical region in which plants, animals, and other organic entities, as well as climate and environment, work together to form an air pocket of life.
As a result of deforestation, the ecosystem is likely to change in the following ways:
Loss of habitat: Deforestation is the destruction of forests, which results in the extinction of many forest-dwelling species.Reduced biodiversity: Deforestation reduces biodiversity in the ecosystem because many forest species are unable to adapt to the new conditions and may become extinct.Thus, the correct options are C and D.
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Bacteria use sugar provided by legumes to produce nitrogen-containing compounds. An
example would be
Answers
Answer:
Examples of this type of nitrogen-fixing bacteria include species of Azotobacter, Bacillus, Clostridium, and Klebsiella. As previously noted, these organisms must find their own source of energy, typically by oxidizing organic molecules released by other organisms or from decomposition.
Explanation:
After Mount St. Helens erupted, one side of the volcano was completely destroyed for 8 miles. The type of succession that occurred in this area is most likely
Answers
Answer:
Secondary Sucession.
Explanation:
once transcribed, eukaryotic mRNA typically undergoes substantial alteration that includes
(a) union with ribosome
(b) excision of introns
(c) fusion into circular forms known as plasmids
(d) linkage to histone molecules
Answers
Answer: B
Explanation:
B describes the RNA processing, which only occurs during eukaryotes and invovles the splicing out of introns and putting together of extrons.
Answer:
b
Explanation:
Phosphorus in soil is transformed into insoluble compounds unless what happens?
Answers
Answer:
It is not absorb by the plants, it turns into insoluble form.
Explanation:
Phosphorus in soil is transformed into insoluble compounds unless not used by the plants. The insoluble phosphorus is transform into soluble form in the soil by phosphorus solubilizing bacteria. The phosphorus solubilizing bacteria helps in conversion of insoluble phosphorus into soluble phosphorus which can absorb by the plants. If the phosphorus is not absorb by the plants and present for a long time, it can be converted into insoluble form which is unavailable for the plants which can be converted back with the help of phosphorus solubilizing bacteria.
A heater provides heat to an area, but the temperature in the area stays about the same. What do you already know about this phenomena?
Answers
ANSWER: IT'S CALLED THE ZEROTH LAW OF THERMODYNAMICS
EXPLANATION:
The zeroth law of thermodynamics state that there's no heat transferred between two objects in thermal equilibrium (i.e having the same temperature). This phenomenon depicts that there's balance in the amount of temperature in all the three entities.
This phenomenon was credited to Sir Ralph Howard Fowler, a British physicist and astronomer during his lifetime.
A scientific paper by Carathéodory also added that when two systems S1 and S2 are made to reach equilibrium with a third system S3 under close thermal conditions, systems S1 and S2 are said to be in mutual equilibrium.
I am quite simple you can see. There is no nucleus inside of me.
Answers
what stage of mitosis does the nuclear membrane disapear
Answers
Answer:
La transición de interfase a mitosis es la profase. En esta etapa ocurren los siguientes eventos: la cromatina se condensa para formar cromosomas, se forma el huso mitótico y desaparece la envoltura nuclear.
Explanation:
Al final de la profase (profase tardía) desaparece la membrana nuclear quedando los cromosomas dispersos en el citoplasma.