Answers
We can explain Mr Mwape that variation in his children through Mendel’s law.
Reason why three children tall and brown one of MR Mwape was short and dark is: -
• Skin color and height is controlled by a lot of genes and every human gets one set of genes from their mother and the other set of genes from their father.
• Now imagine these genes are denoted as ‘T’ for tall and ‘B’ for brown and ‘t’ for short ‘b’ brown. We can assume that MR Mwape and his wife having genotype TtBb.
• During the process of gene segregation and assortment, the majority percentage of children got the heterogenous dominant genotype, which is ‘TtBb’, overlapping the effect of gene ‘t’ and ‘b’. While another child got a homogenous recessive genotype ‘ttbb’ from both the parents, hence the genotype is prominently shown in the fourth child and not in other as gene 't' and 'b' were dominated by genes 'T' and 'B'.
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Related Questions
what is most likely the relationship between the structure and function of these specialized cells??
Answers
What we are seeing in the image is a cut of vascular tissue where we can appreciate the xylem and the phloem, and these have the function to transport water and nutrients into the plant, therefore we can say the correct answer is option C.
If Mars is moving at a rate of 24.2 km/s, how many mi/hr would that calculate to be?
-this is science. again, didn't see this option-
Answers
Answer: 54133.858
hope this helps :)
Put these steps of solar system formation in order
Answers
Answer:
Explanation: I tried to use the answer that was on there and it was wrong so I got that answer wrong luckily it tells the the correct answer
Answer: Answer is explained below.
Explanation:
Solar system formation put in order:
A solar nebula forms. Gravity pulls the solar nebula upon itself.The solar nebula spinsfaster and faster.The solar nebula flattens into a disk. Gas becomes hot and dense and forms a star.Hope this helps someone. Good luck everyone!
*Karma will go after the next person who deletes my answer. How dare you!
What part of the peripheral nervous system prevent you from holding your breath
Answers
Answer:
The respiratory centers that control your rate of breathing are in the brainstem or medulla. The nerve cells that live within these centers automatically send signals to the diaphragm and intercostal muscles to contract and relax at regular intervals.
(hope it helped)
Explanation:
Answer:
A part of the peripheral nervous system called the autonomic nervous system controls many of the body processes you almost never need to think about, like breathing, digestion, sweating, and shivering.
In which of the following situations does the cell use active transport?
Answers
Answer: The correct option is B. Sodium ions move into the cell from areas of lower concentrations.
Explanation:
Active transport can be described as a process in which molecules move from an area of lower concentration to an area of higher concentration against the concentration gradient. Energy is required for the process of active transport to occur.In the option B, sodium ions are moving into the cell from areas which have a low concentration of sodium i.e against the concentration gradient. Hence, option B tells that the sodium ions will move inside the cell by the process of active transport.
Explanation:
In an experiment assigned to test the effect of different concentration of a fertilizer on the growth rate of a plant which one of the following is the dependent variable
Answers
In the given experiment, the dependent variable would be the growth rate of the plant.
In this case, the independent variable is the different concentration of the fertilizer. The researcher is deliberately varying the concentration levels to observe its effect on the plant's growth. The dependent variable, which is the growth rate of the plant, is expected to be influenced by the different concentrations of the fertilizer.
By measuring and comparing the growth rate of the plant across the different fertilizer concentrations, the researcher can determine if there is a relationship between the concentration of the fertilizer and the plant's growth. This helps to assess the impact of the fertilizer on the plant's development and identify the optimal concentration that promotes the highest growth rate.
The dependent variable is crucial in analyzing the results and drawing conclusions about the effectiveness of the fertilizer at different concentrations.
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Cilia in cells along the trachea ad nasal passage secrete blank which traps dirt and particles from the air
Answers
Answer:
Yes it secretes blank to trap and particles from the air
explain why myelinated is faster than unmyelinated
Answers
The structure of a typical neuron has a Myelin sheath (myelin is produced by the Schwan cell, in the peripheral nervous system), in the axon area, also certain points called along the axon are called nodes of Ranvier, these are, small unmyelinated areas. When action potentials occur in a neuron, only happen in the nodes of Ranvier (unmyelinated areas). This exact mechanism, saltatory conduction, is made possible by the presence of myelinated areas what makes that the action potential propagates faster than it would in a un unmyelinated axon.
Color code: Yellow are the myelinated areas, and the orange dots between them are the nodes of Ranvier
What type of boundary is this?
Answers
The image represents the continental-continental boundary. When two continental plates collide, that's another kind of convergent plate boundary. The continental lithosphere is very thick and has a low density. The continental lithosphere cannot subduct. So when two mainland plates impact, they simply crush together.
Plate tectonic boundaries come in three varieties: plate boundaries that are transformed, divergent, and convergent. The three primary types of plate boundaries are depicted in this image: transform, convergent and divergent.
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If a DNA triplet is "ATC," then the complementary mRNA sequence will be
A. CGA
B.UAG
C. TAG
D. AUC
Answers
Explanation: I had this in my test.
Whoever helps me asap and gives the best answer I will mark as brainliest!Part 2: David’s Physical Condition
At his trial, David’s defence argued that his behaviour had not been under his control. Shortly before his behaviour changed, David had accidentally been exposed to a high concentration of an organophosphate pesticide called carbaryl. Carbaryl is a substance that can have an effect on the nervous system. In fact, it behaves similarly to many nerve gasses (chemical weap-ons that exert their effect by impairing the functioning of the nervous system). Carbaryl works by affecting the way that brain cells communicate with each other. This communication occurs at synapses,little gaps at the junctions of nerve cells. Neurones (nerve cells) release chemicals to send signals across the gap. These chemicals are called neurotransmitters. After it has been released, the neurotransmitter is broken down to prevent it from stimulating the post-synaptic neurone for any longer than necessary. Carbaryl prevents the breakdown of a neurotransmitter called acetylcholine (ACh). Exposure to high doses of carbaryl causes ACh to build up in the brain and other parts of the nervous system. One of the many parts of the brain that uses ACh is a structure called the hypothalamus. This structure is important in a huge range of behaviours including eating, drinking, sex, and aggression. Electrical stimulation of specific parts of the hypothalamus can cause a rat to show signs of rage and attack behavior. David’s defence argued that the carbaryl to which he had been exposed had affected the functioning of his hypothalamus. A small provocation would have started the parts of the hypothalamus associated with attack behaviours to start firing. However, because of the carbaryl, they would not have been able to stop, leading to uncontrolled rage and aggression.
Discussion Questions:
• Based on the evidence provided, do you think David is morally responsible
for his crime?
• What possible environmental influences may have incited David to act as he did?
• Why do you think the jury believed the prosecution in spite of the defence’s
argument?
• How does this case affect your views on the nature versus nurture debat
Answers
1. Determining moral responsibility in cases like these can be complex. While David's defense argued that his behavior was a result of the exposure to carbaryl, the concept of moral responsibility takes into account the ability to understand the consequences of one's actions and to make choices accordingly.
If David's exposure to carbaryl significantly impaired his ability to control his behavior and make rational decisions, it could potentially diminish his moral responsibility for the crime.
However, the assessment of moral responsibility is subjective and can depend on legal, ethical, and societal perspectives.
2. The primary environmental influence highlighted in this scenario is David's accidental exposure to the high concentration of carbaryl, an organophosphate pesticide.
Carbaryl, by affecting the communication between brain cells, particularly in the hypothalamus, may have disrupted the normal functioning of David's brain and influenced his behavior.
However, it's worth noting that other environmental factors, such as upbringing, social influences, previous experiences, and stressors, could also play a role in shaping an individual's behavior.
3. The jury might have found the prosecution's case more convincing due to factors such as:
a) Counter Arguments or lack of sufficient evidence presented by the defense.
b) Bias or preconceived notions of the jury members.
c) The prosecution's ability to present a compelling narrative and connect the evidence to David's actions.
d) The jury's limited understanding of the complexities of neurobiology and the effects of substances like carbaryl on behavior.
4. The nature versus nurture debate centers around the relative influence of genetic factors (nature) and environmental factors (nurture) in shaping an individual's traits, behaviors, and actions.
This case highlights the significant impact of an environmental factor, namely the exposure to carbaryl, on David's behavior.
It suggests that environmental influences, in this case, chemical exposure, can have profound effects on neural functioning and subsequent behavior.
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What was the main idea of Wegener's continental drift theory?
Answers
The continental drift theory basically states that Earth's surface is composed of moving plates and this means that landmasses that are now separated may have been together in the past.
Answer:
its B
Explanation:
list the 6 kingdoms and an give an example of each
Answers
Answer:
kingdom of what
Explanation:
What is found in the cryosphere?
O A. Mostly seawater from Earth's oceans
O B. Most of Earth's freshwater
O C. Only frozen water at the polar caps
D. Only frozen soil known as permafrost
Answers
A wrinkled, green seed and a round yellow seed were grown into plants and mated. In the F1 generation, half the seeds were round and yellow; the other half were round and green. The round yellow seeds were grown into plants and allowed to self-fertilize. In the F2 generation, what fraction of the seeds will be genotypically identical to the plants of the parental generation
Answers
Answer:
Parental generation: rr yy and RR Yy
wrinkled, green round, yellow
F2) 2/16 RRYy
1/16 rryy
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files
When females go through meiosis to create gametes it is very different than males. Explain what happens
during oogenesis, be sure to include polar bodies in your explanation.
Answers
Oogenesis results in the production of one functional egg and several polar bodies that are eventually discarded, ensuring the preservation of cytoplasmic resources in the egg for successful fertilization and early embryonic development.
During oogenesis, the process of producing female gametes or eggs, the primary difference compared to males is the uneven division of cytoplasm. In humans, oogenesis begins during fetal development and continues throughout a woman's reproductive life.
In the ovary, oogonia (diploid cells) undergo mitosis to increase their number. One of the resulting cells becomes the primary oocyte, which enters meiosis I but pauses in prophase I until puberty. Each month after puberty, one primary oocyte resumes meiosis I and divides asymmetrically. The division produces a secondary oocyte and a small polar body, which contains a minimal amount of cytoplasm. The secondary oocyte then enters meiosis II but pauses again in metaphase II.
If fertilization occurs, the secondary oocyte completes meiosis II, yielding a mature egg (ovum) and another polar body. The mature egg contains the bulk of the cytoplasm and organelles necessary for embryonic development. The polar bodies, though non-functional, ensure that the cytoplasm is concentrated in the egg and help preserve the genetic material.
Overall, oogenesis results in the production of one functional egg and several polar bodies that are eventually discarded, ensuring the preservation of cytoplasmic resources in the egg for successful fertilization and early embryonic development.
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un caballo negro de antepasados desconocidos fue apareado con cierto numero de yeguas de color rojo deraza pura, estos apareamientos dieron 20 descendientes de colo rojo y 25 de color negros
Answers
Pregunta completa: un caballo negro de antepasados desconocidos fue apareado con cierto numero de yeguas de color rojo de raza pura, estos apareamientos dieron 20 descendientes de colo rojo y 25 de color negros.
A) cual de dichos caracteres fenotipicos es mas probable que este causado por un homocigoto recesivo?
B) segun su hipotesis cuantos individuos de cada clase habrian esperado
Answer:
A) El color rojo es causado por un genotipo homocigota recesivo
B) Se habrían esperado 22.5 individuos negros y 22.5 individuos rojos, que juntos sumarian un total de 45 individuos.
Explanation:
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Physical abuse is any
physical injury caused to a child, which includes hitting, slapping, and pinching.
Answers
Answer:
yes that is if it is for not for discipline purposes and can still only be used to certain extent must not leave bruises and if so must be gone it 72 hrs if any of this is being experience please report to the proper authorities
Explanation:
What is a host? Give two examples of ways humans serve as hosts for infectious diseases.
Answers
Answer:
a host is something that hosts a disease
Explanation:
humans are vulnerable, so they can get a disease and spread it.
Answer:
A host in the context of infectious disease refers to an animal or plant that acts as a biological refuge in which another - often parasitic - organism may dwell. The host usually provides shelter or nourishment to the other organism, which may use the host to partially/completely sexually develop.
Explanation:
The surface temperature on Mercury during the day is 1130 degrees F and -300 degrees F during the night (turned away from the sun). The surface temperature on Venus is 864 degrees F no matter day or night. Explain the difference.
Answers
Answer:
because the Venus is straight to the sun or near the sun and the mercury is narrow to the sun
During which step of the replication-transcription-translation process does each type of rna first play a role?
Answers
According to the research, the correct answer that during the transcription rna first play a role as mRNA, in the translation process as tRNA.
What is RNA?It is a molecule formed by a polyribonucleotide of variable length that contains uracil instead of iimine and is responsible for the regulation of gene expression, there are three types:
messenger RNA (mRNA)ribosomal RNA (rRNA)transfer RNA (tRNA).In this sense, the transcription of genetic information is the first step of gene expression where the messenger RNA carries information from the DNA to the ribosome and translation is a decoding process where the transfer RNA carries a certain amino acid to a polypeptide.
Therefore, we can conclude that according to the research, RNA first plays a role as mRNA, which is what proceeds to carry the information of one or more genes and which, moreover, are those that code for proteins.
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Select the organ system which is best described in each sentence.
Which organ system is responsible for transporting nutrients, gases, and hormones through the body?
Which organ system helps waste gases such as carbon dioxide leave the body?
Which organ system includes the brain?
The kidneys and the urethra are part of which body system?
Answers
1. In the organ system, The circulatory system is responsible for providing gases, nutrients, and hormones around the body.
2. The organ system that helps waste gases such as carbon dioxide leave the body is the respiratory system.
3. The organ system that includes the brain is the nervous system.
4. The kidneys and the urethra are part of the urinary system.
1.The circulatory system is the organ system in charge of delivering nutrients, gases, and hormones throughout the body. It consists of the heart, blood vessels, and blood, which work together to transport oxygen, nutrients, hormones, and waste products throughout the body. The heart pumps oxygenated blood to the tissues, delivering nutrients and oxygen, while the blood vessels act as a network of highways to distribute these substances to cells and organs.
2. The respiratory system is the organ system that assists waste gases such as carbon dioxide in leaving the body. The lungs, airways, and respiratory muscle are all part of it. During respiration, oxygen is taken in and carbon dioxide is removed from the body. The lungs exchange gases by inhaling oxygen-rich air and exhaling carbon dioxide.
3. The nervous system is the organ system that contains the brain, as well as the spinal cord and nerves. The brain is the body's command and control Centre, coordinating and regulating many physical activities and processes.
4. The kidneys and the urethra are part of the urinary system. The urinary system is responsible for filtering waste products, excess water, and toxins from the blood, producing urine, and eliminating it from the body. The kidneys filter the blood, removing waste and excess substances, while the urethra is the tube that carries urine from the bladder to the outside of the body during urination.
These organ systems work together to maintain homeostasis and ensure the proper functioning of the human body.
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Answer:
Which organ system is responsible for transporting nutrients, gases, and hormones through the body?
✔ cardiovascular system
Which organ system helps waste gases such as carbon dioxide leave the body?
✔ respiratory system
Which organ system includes the brain?
✔ nervous system
The kidneys and the urethra are part of which body system?
✔ urinary system
Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?
a caliper and a flask
a stopwatch and a beaker
a balance and a beaker
a meter stick and a temperature probe
Answers
Option C. a balance and a beaker are the instruments used to measure the density of seawater.
Density is defined as the mass of an object divided by its volume. Measuring the density of seawater is critical to oceanography since the density of seawater varies based on salinity and temperature, both of which have significant implications for ocean circulation, marine organisms, and weather systems. The pair of laboratory instruments that a student would use to measure the density of seawater is a balance and a beaker.
The mass of seawater is measured using the balance, while the volume is measured using the beaker. Let's learn more about the measurement of density: Measurement of Density: To determine the density of an object or substance, we must first calculate its mass and volume using laboratory instruments such as a balance and a beaker. The mass of an object is the amount of matter it contains, which is measured in grams. A balance is a tool used to measure mass. The volume of an object is the amount of space it occupies, which is measured in liters.
A beaker or a graduated cylinder is used to measure volume. The density is obtained by dividing the mass by the volume. To determine the density of seawater, a student can collect a sample of seawater and place it in a beaker. The mass of the seawater sample is measured using a balance. The volume of the seawater is calculated by measuring the volume of the beaker before and after adding the seawater and subtracting the initial volume from the final volume. The student then calculates the density of the seawater by dividing the mass of the seawater by its volume.
In conclusion, a balance and a beaker are the instruments used to measure the density of seawater. Therefore the correct option is C
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what is the effect of Earth’s curvature and tilt
Answers
Q
What are insectivorous plants and what is their
mode of nutrition?
Answers
Answer:
Plants that eat bugs and insects for nutrition.
such plant are green hens they can prepare their own food by photosynthesis has these plant can be called autotrophic but they cannot make their nitrogen from soil such plant usually grow it place where they are sacarcity of nitrogen and they compensate this deficiency of nitrogen by eating insect thus this plant are partial heterotrophic for this purpose they have various type of adaptation.
this plant eat small insect like spider .such plant have special structure to catch their prey.these plant usually green in colour and can prepare their on food.they eat insects because they grow in soil that is deficient in certain nutrient.they full film their nitrogen requirement by eating insect.Carnivorous plantVenus flytrap
in Venus fly trap the leaves are modified into a trap the leaves inner surface of leaves have short step hair when an insect come in contact with these hair the two hole loves of leaves get closed and insect get trapped inside it which it then digested with the help of digestive juice present on itJust like Mendel, you have grown a pea plant that has two phenotypic traits you are interested in. Round (Dominant) or Wrinkled (Recessive), Yellow (Dominant) or Green (Recessive) After crossing two plants heterozygous in both traits (RrYy x RrYy), you have 556 progenies classified as follows. Calculate their expected progeny phenotypic distributions as if these traits are independently assorted rather than linked. (4 pts)
Observed Values
315 Round, Yellow Seed
108 Round, Green Seed
101 Wrinkles, Yellow Seed
32 Wrinkled, Green Seed
556 Total Seeds
What are the Expected Values for RrYy x RrYy?
Use Chi-Square Analysis and the p-value chart (refer to Lab 4 handout for formula and chart) to determine whether these traits do indeed display independent assortment. Show your work. (4 pts)
What is your null hypothesis? Are the data consistent with your null hypothesis or can you reject the null hypothesis? Provide the p-value evidence to support your case. (4 pts)
List three properties of DNA that would be the same between DNA isolated from strawberries and any other living organism. (3 pts)
List three properties that would be different between DNA isolated from strawberries and the DNA of any other living organism. (3 pts)
If a chromosome is 2 μm long during mitosis and contains about 1.5 cm of supercoiled DNA, how many times must the DNA condense itself during mitosis? Show your work. (1 pt)
If this measurement were the same for all of your chromosomes, how long would your DNA be in the uncondensed form if you joined all of it from end to end? Show your work. (1 pt)
Answers
The probability of both traits appearing in the same offspring is (3/4) x (3/4) = 9/16 and the probability of both traits appearing in the same offspring is (1/4) x (1/4) = 1/16.
What are traits?Traits are defined as specific characteristics or attributes of an individual.
1. To calculate the expected values, we need to multiply the total number of progeny by the probabilities of each phenotype. The expected values are:
315 Round, Yellow Seed = (556) x (9/16) = 311.5
108 Round, Green Seed = (556) x (3/16) = 104.5
101 Wrinkles, Yellow Seed = (556) x (3/16) = 104.5
32 Wrinkled, Green Seed = (556) x (1/16) = 34.5
2. Chi-Square Analysis:
The chi-square test is used to determine whether the observed data fits the expected data. The formula for the chi-square test is:
χ² = Σ [(O-E)²/E]
Where:
χ² = chi-square value
O = observed frequency
E = expected frequency
We can calculate the chi-square value for this data as follows:
χ² = [(315-311.5)2/311.5] + [(108-104.5)2/104.5] + [(101-104.5)2/104.5] + [(32-34.5)2/34.5]
χ² = 1.01 + 1.69 + 0.84 + 0.39
χ² = 3.93
3. Degrees of freedom (df) = (number of phenotypes - 1) = 3
Using the chi-square distribution table with 3 degrees of freedom and a significance level of 0.05, the critical value is 7.815. Since our calculated chi-square value (3.93) is less than the critical value (7.815), we fail to reject the null hypothesis.
4. Null Hypothesis:
The null hypothesis is that the observed data fits the expected data, meaning that the traits are independently assorted.
5. Properties of DNA that are the same between strawberries and any other living organism:
DNA is composed of four nitrogenous bases: adenine, guanine, cytosine, and thymine.DNA is organized into double helix structures.DNA is responsible for carrying genetic information.6. Properties of DNA that are different between strawberries and any other living organism:
The sequence of the nitrogenous bases is unique to each organism.The amount of DNA in each organism can vary widely.The number of chromosomes can vary widely between organisms.7. Calculating the number of times DNA must condense itself during mitosis:
If the chromosome is 2 μm long and contains about 1.5 cm of supercoiled DNA, then the DNA must condense itself by a factor of 1.5 cm / 2 μm = 7500 times during mitosis.
8. Calculating the length of DNA in the uncondensed form:
If the chromosome is 2 μm long and contains 1.5 cm of DNA, then the length of DNA in the uncondensed form is 1.5 cm / 2 μm = 750,000 μm or 750.
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What types of memories are related to experiences that are intense or surprising?
Question 3 options:
Flashbulb memories
Prospective memories
Shallow memories
Tactile memories
Answers
Flashbulb memories are the type of memories related to experiences that are intense or surprising.
Flashbulb memories are the long-lasting memories that have great effect on the emotional state of an individual. It is due to some learning or experience of a dramatic event. The memory can trigger enthusiasm or terror. For example, a college graduation, birth of child, or even some terror attack.
Memories are the type of data stored inside the brain about past events. A memory is the one that is acquires, stores, pertained for a very long time and is also retrieved as and when needed. Memories are retrieved by the reactivation of some specific neurons.
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Please help this is a 7th grade science problem
Answers
Answer: D
0%
Explanation: you need two recessive traits (tt) to have a recessive gene (short)
hope this helps, have a great day!!
where are embryonic stem cells harvested from? kidneys , cord blood , cytoplasm or bone marrow
Answers
The daughter atom formed by the alpha decay of has a mass number of ?
Answers
Answer:
I think the answer to your question is 4u
Explanation:
an alpha particle is identical to the nucleus of a helium for Adam which consists of two protons and two neutrons it has a charge of 2 + C and a mass of 4 U