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Which correctly defines homologous structures?
A
Anatomically similar structures found in multiple organisms that may or may not share a similar function but result from convergent evolution.
B
Anatomically similar structures found in multiple organisms that may or may not share a similar function but result from divergent evolution.
C
Anatomically different structures found in multiple organisms that share a similar function and result from convergent evolution.
D
Anatomically different structures found in multiple organisms that share a similar function and result from divergent evolution.
Answer: d
Explanation:
Environment: Polluted Forest Moths Released G1 G2 G3 G4 G5 Typica 125 88 83 76 29 Carbonaria 510 735 885 1042 1406 Total 635 823 968 1118 1435 Phenotype Frequency Color Initial Frequency Frequency G5 Typica Light 9 Carbonaria Dark Allele Frequency Allele Initial Allele Frequency G5 Allele Frequency q d p D Genotype Frequency Moths Genotype Color Moths Released Initial Frequency Frequency G5 Number of Moths G5 q2 Typica dd Light 2pq Carbonaria Dd Dark p2 Carbonaria DD Dark
The recessive allele frequency decreased (q = 0.14) and the dominant one increased (p = 0.86). Genotypic frequencies followed this tendency too (q² =0.02, 2pq = 0.24 and p² = 0.74). The Carbonaria phenotype increased to 0.98, while Typica showed a frequency of 0.02.
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Available data:
Some moths were released in the forest (N=1000). 250 were white, and 750 were black.
The color is defined by a single diallelic gene. The dominant allele -D- codes for black color (carbonaria), while the recessive allele -d- codes for white (Typica).
These individuals produced five new generations since they were released, G1, G2, G3, G4, G5.
Moths realesed G1 G2 G3 G4 G5
Typica 250 125 88 83 76 29
Carbonaria 750 510 735 885 1042 1406
Total 1000 635 823 968 1118 1435
Phenotype frequencies
Color Initial Frequency G5 Frequency
Typica white 0.25
Carbonaria Black 0.75
Allele Frequencies
Allele Initial Allele Frequency G5 Allele Frequency
q d 0.5
p D 0.5
Genotype Frequency
Moths Genotype Color Released Initi.Freq. G5 Freq. Nº F5 moths
q² Typica dd White 250 0.25
2pq Carbon. Dd Black 500 0.50
p² Carbon. DD Black 250 0.25
This information is guiding you to know how to calculate frequencies and total numbers. Information about released individuals is an example of how you need to proceed.
Firts, we will assume that this population is under Hardy-Weinberg equilibrium. So let us review some theoretical framework.
The allelic frequencies in a locus ⇒ p and q ⇒ dominant and
recessive alleles.
The genotypic frequencies after one generation are p² (H0m0zyg0us dominant), 2pq (Heterozyg0us), q² (H0m0zyg0us recessive).
If a populations is in H-W equilibrium, it will get the same allelic frequencies generation after generation.
The sum of allelic frequencies equals 1 ⇒ p + q = 1. The sum of genotypic frequencies equals 1 ⇒ p² + 2pq + q² = 1Now let us analyze the problem.
We need to get information on G5 generation. We will do it step by step.
1) Phenotype frequencies
To get the Phenotype frequencies, we just need to divide the number of individuals with each phenotype by the total number of individuals in this generation. So,
Total number of individuals in G5 → 1435 White = Typica = 29 individuals Black = Carbonaria = 1406 individuals
⇒ F(Typica) = 29 / 1435 = 0.02
⇒ F(Carbonaria) = 1406 / 1435 = 0.979 ≅ 0.98
2) Allelic Frequencies
We can use the phenotypic frequencies to get the allelic frequencies.
Remember that carbonaria (black) moths include h0m0zyg0us dominant (DD) and heter0zyg0us (Dd) individuals. So we can not get the allelic frequencies from this data.
We can only use the allelic frequency of Typica (White) individuals. Typica phenotypic frequency only includes h0m0zyg0us recessive individuals, dd.
We know that,
H0m0zyg0us recessive genotype → dd
Genotypic frequency → F(dd) → Represented as q²
F(Typica) = F(dd) = q² = 0.02
Recessive allele → d
Recessive allelic frequency → f(d) → Represented as q
f(d) = q = ??
q² = 0.02
q = √ 0.02
q = 0.1414 ≅ 0.14
0.14 is the recessive allelic frequency. Now we should calculate the dominant allelic frequency. To do this, we will clear the following formula,
p + q = 1
p + 0.14 = 1
p = 1 - 0.14
p = 0.86
So, now we also know that
⇒ f(D) = p = 0.86
⇒ f(d) = q = 0.14
3) Genotypic Frequencies
Now, we need to get the genotypic frequencies, F(xx)
⇒ F(DD) = p² = 0.86² = 0.7396 ≅ 0.74
⇒ F(Dd) = 2pq = 2 x 0.86 x 0.14 = 0.24
⇒ F(dd) = q² = 0.14² = 0.0196 ≅ 0.02
4) Number of individuals
Finally, we need to tell the number of individuals with each genotype. We just need to multiply each frequency by the total number of individuals in G5.
F(DD) = p² = 0.74
F(Dd) = 2pq = 0.24
F(dd) = q² = 0.02
Total number of individuals = 1435
⇒ DD Black -Carbonaria- individuals → 0.74 x 1435 = 1,061.9 ≅ 1062
⇒ Dd Black -Carbonaria- individuals → 0.24 x 1435 = 344.4 ≅ 344
⇒ dd White -Typica- individuals → 0.02 x 1435 = 28.7 ≅ 29
From this results, we can conclude that the moths population is not in H-W equilibrium, because their allelic and genotypic frequencies changed through generations.
It seems that Natural selection is favoring the dominant phenotype by increasing the frequency of the dominant allele over the recessive one. Probably directional selection is acting on this population.
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How can using a dam as a source of freshwater also harm wildlife?
A. Dams help control floodwaters.
B. Dams provide drinking water.
C. Dams displace existing habitats.
Ο Ο
D. Dams provide water recreation.
Answer:
c
Explanation:
because its the only one that would be hurting wild life.
Using a dam as a source of freshwater can harm wildlife by displacing existing habitats. Therefore, option (C) is correct.
What are the negative impacts of dams?Dams often require the creation of reservoirs, which can submerge large areas of land and alter the natural flow of rivers and streams. This can lead to the loss of important habitats for fish, mammals, and other wildlife that rely on rivers and streams for food, shelter, and reproduction.
In addition, changes in water temperature, dissolved oxygen levels, and water flow can negatively impact aquatic ecosystems downstream from the dam.
These impacts can be mitigated through careful planning and management, such as the creation of fish ladders and other structures to help fish navigate past the dam, and the release of water at appropriate times to mimic natural flow patterns.
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Answer:
The answer is C, from hydrosphere to atmosphere
Answer:
C
Explanation:
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Look at the diagram. Name organ 4.
Answer:
That's the liver
Explanation:
Just look up "Liver Diagram"
One of the following statements is correct about glycolysis:
A.Net gain of only 2 ATP.
B.Glycolysis in fermentation reaction requires more oxygen than glycolysis in aerobic respiration
C.Carbon dioxide is used during glycolysis to form ATP.
D.Only animals can carry on glycolysis.
Answer:
A.
Explanation:
Glycolysis produces 4 ATP molecules in total, however 2 ATP molecules are used to convert a glucose molecule into a new 6 carbon compound with 2 phosphates attached to it. So, the net yield of ATP is 2 molecules.
Answer:
A net gain of only 2 ATP
Explanation:
Does sugar free red bull have energy for cellular respiration and if so what kind?
Answer: yes my man
Explanation:
Answer:
Red Bull Zero and Red Bull Sugarfree contain the same main ingredients – caffeine, taurine and some B-group vitamins. Both are made without sugar, instead using different low calorie sweeteners.
Explanation:
Share three ways you would take to reduce water pollution.
Which weather conditions will most likely cause heavy rain and cooler temperatures? (A. Cold front) (B. Seabreeze) (c. warm front) (D. Land breeze)
Answer:
a. cold front
Explanation:
Many fronts cause weather events such as rain, thunderstorms, gusty winds, and tornadoes. At a cold front, there may be dramatic thunderstorms.
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Following the fusion of an egg cell and sperm cell, the resulting diploid cell divides by mitosis to create two new daughter cells. Each daughter cell contains pairs of chromosomes, with one set inherited from each parent.
Which of the following best describes the pairs of chromosomes that are present in each newly formed daughter cell?
Choose 1 answer:
A) The pairs are homologous chromosomes that have the same set of genes, but likely different variations of those genes.
B) The pairs are non-homologous chromosomes that contain different sets of genes.
C) The pairs are homologous chromosomes that have identical copies of every gene.
Answer: A
i have no idea why
The pairs are homologous chromosomes that have the same set of genes, but likely different variations of those genes. The correct option is A.
What are homologous chromosomes?Among a pair of chromosomes with the very same gene sequence, loci, chromosomal size, and centromere location is referred to as a homologous chromosome.
One paternal and one maternal chromosome make up a homologous pair. In humans, the nucleus of a somatic cell contains 46 chromosomes.
Homologous chromosomes differ from sister chromatids because they are not identical and do not emanates from the same organism.
Sister chromatids are identical, side-by-side duplicates of each other that form as a result of DNA replication.
Homologous chromosomes do not pair together during mitosis. Homologous chromosomes line up end-to-end in mitosis so that when the cells divide, each daughter cell receives a sister chromatid from both members of the homologous pair.
Thus, the correct option is A.
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Individual A, who is suffering from cardiovascular disease consume a set of briyani rice
daily for a long period of time.
Discuss the effects of the diet to his health.
[10 markah/ marks]
Answer:
Eating whole grains like brown basmati rice is linked to a lower risk of heart disease. Whole grains help to reduce blood cholesterol levels.
https://www.webmd.com/diet/health-benefits-basmati-rice#1
What is the role of knowing the Earth's history to mankind?
Answer:
Earth history enables us to understand those changes which no human being has ever seen (or if they have, they didn't record it) and to relate them to modern changes. Such events include: The rise and extinction of the dinosaurs. The formation of the Grand Canyon.
Explanation:
Answer:
Earth history enables us to understand those changes which no human being has ever seen (or if they have, they didn't record it) and to relate them to modern changes. Such events include: The rise and extinction of the dinosaurs. The formation of the Grand Canyon.
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True or False: A positive ion and a negative ion will repel each other.
Answer:
FALSE is correct
Explanation: Questions protected!
What of the following best explains the pace and timing of evolutionary change?
A: Evolutionary change quickly and constantly occurs throughout time.
B: The pace of evolutionary change has slowed down over time, and it only rarely occurs now.
C: Periods during which evolution occurred were always preceded by a catastrophe.
D: Long periods of stability were punctuated with periods of evolutionary change.
Answer:
B: The pace of evolutionary change has slowed down over time, and it only rarely occurs now.
Explanation:
What of the following best explains the pace and timing of evolutionary change The pace of evolutionary change has slowed down over time, and it only rarely occurs now.
Answer:
D: Long periods of stability were punctuated with periods of evolutionary change.
Explanation:
How is Wallace's view scientific
Which group tells the three unifying characteristics of chordates?
Answer:
As chordates, all vertebrates have a similar anatomy and morphology with the same qualifying characteristics: a notochord, a dorsal hollow nerve cord, pharyngeal slits.
Have a good day
Answer:
Notochord, gill slits, and dorsal nerve cord.
Explanation:
Just took the k-12 test and got it right!
What is the phase shown below?
Prophase
Metaphase
Telophase
Anaphase
Answer:
Telophase
Explanation:
Which ball-and-socket joint is the most freely moveable joint in the body?
Answer:
c. Glenohumeral joint
Explanation: is correct (the Shoulder joint)
Human cells have _____ sets of DNA in each cell.
A) 2
B) 4
C) 1
D) 8
Answer:
See answer below.
Answer is verified.
Explanation:
Human cells have two sets of DNA in each cell.
And a total of 46 chromosomes in each cell.
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Human cells have two sets of DNA in each cell. Thus, the correct option is A.
What is DNA?DNA stands for Deoxyribonucleic acid. It is considered the genetic material of most organisms. It consists of base pairs like adenine, thymine, guanine, and cytosine.
Human cells have two sets of DNA in each cell, one came from the paternal side while the other came from the maternal side.
Therefore, it is well described above.
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The movement of tectonic plates in two locations is described below:
Location A: Tectonic plates collide and one plate moves over the other while the other plate is pushed deep into the mantle
Location B: Tectonic plates slide past each other
PLS HELP I WILL GIVE BRAIBLIEST AND 100 POINTS
Which statement is most likely correct?
Volcanic eruptions may occur in both locations.
There is no chance of earthquakes in the two locations.
Mountains may form in Location B but not in Location A.
Subduction happens in Location A but not in Location B.
Explanation:
volcanic eruption may occur in both location
Answer: D
Explanation subduction happens when one plate is ontop of another and pushes it into the matel
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Define: Heterogeneous Distribution, Modularity and Nestedness.
Explanation:
Nestedness is another computational approach that provides a description of groups of webs..
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Answer:
Heterogeneous Distribution, ModularityHeterogeneity in statistics means that your populations, samples or results are different. It is the opposite of homogeneity, which means that the population/data/results are the same. ... For example, if everyone in your group varied between 4'3″ and 7'6″ tall, they would be heterogeneous for height.Explanation:
please brainlies me if you carry please #carry on learningWhat is conditioning?
Answer:
conditioning, in physiology, a behavioral process whereby a response becomes more frequent or more predictable in a given environment as a result of reinforcement, with reinforcement typically being a stimulus or reward for a desired response.
Explanation:
What makes social animals unique?
Answer:
In these species, members of the group depend completely on one another. Different animals within the group have different jobs. Therefore, group members must work together for the good of all. Most species of ants and bees are highly social animals.
Explanation:
Which of the following is not a characteristic of lakes? A) deeper than ponds B) lack of waves C) found in mountainous regions D) larger than ponds E) fed by rivers
Answer: E - Fed by rivers
RR is described as what genotype
Answer:whenever the allele pair RR of a gene is present the colour of flowers
would always be red.
Explanation:
Which layer in the blood vessel is composed of smooth muscle, allowing it to dilate or constrict?
Tunica intima
*Tunica media
Tunica externa
Endothelium
Answer:
b. Tunica media
Explanation:is correct
Answer:
B. Tunica media
Explanation:
The active ingredient in which of the following drugs mimics a natural neurotransmitter?
Answer:
b. marijuana is correct
Explanation:
Many scientists consider genetic engineering to be simply an efficient method of selective breeding. Is it?
Articulations are classified by their function or structure. Which of the following is an example of functional classification?
Answer:
d. Synarthrotic joints
Explanation: is correct for the choices offered.
