Answers
Answer:
Nondisjunction
Explanation:
Nondisjunction occurs when homologous chromosomes or sister chromatids fail to separate during meiosis, resulting in an abnormal chromosome number.
Related Questions
The main difference between stream pools and ponds is that stream pools
Answers
Which model accurately represents how DNA replication functions? Explain.
Answers
Answer: the semiconservative one
Explanation: it desribes how dna replication works
which of the following best explains the role of cell-to-cell communication during a response to an invasion of antigens?
Answers
Chemicals that are secreted from antigen-presenting cells then activate helper T cells. - best explains the role of cell-to-cell communication during a response to an invasion of antigens.
What is antigen-presenting cell?
Antigen presentation, also known as antigen presentation, is the act of a cell displaying an antigen bound by major histocompatibility complex (MHC) proteins on its surface. These complexes may be recognised by T cells via their T cell receptors (TCRs). Antigens are processed by APCs before being shown to T lymphocytes.
Almost all cell types have some capacity to express antigens. They can be present in several kinds of tissues. Professional antigen-presenting cells, such as macrophages, B cells, and dendritic cells, present foreign antigens to helper T cells, whereas virus-infected cells are able to present cytotoxic T cells with internal antigens. Antigen presentation depends on various specialised signalling molecules on the surfaces of both APCs and T lymphocytes in addition to the MHC family of proteins.
To learn more about antigen-presenting cell from the given link
https://brainly.com/question/9979996#:~:text=Expert%2DVerified%20Answer&text=Antigen%2Dpresenting%20cells%20are%20cells,thus%20initiate%20adaptive%20immune%20responses.
#SPJ4
2.16 Unit Test: Evolution Pt.2 Please help ASAP!
1. The male resplendent quetzal bird has evolved to have tail feathers that are approximately 60 cm long. The female quetzal has short tail feathers. Using the quetzal as your example, describe how the mechanism of natural selection may have led to the evolution of the male quetzal’s extraordinarily long tail feathers.
Answer:
2. Variation in a trait is a required condition for natural selection to act on a population for that trait. Assuming a population of organisms only started with only one form of a trait, what are two ways variation in the trait could be introduced into the population? Explain your answer.
Answer:
3.Give a basic definition of evolution as taught in this unit.
Answer:
Answers
Variation in a trait could be introduced into a population through mutation, which is a random change in an organism's DNA that can lead to a new trait. Alternatively, variation could be introduced through gene flow, which is the movement of genes from one population to another as a result of migration or other factors. For example, if a new population of organisms with a different form of a trait arrived in a previously homogenous population, this could introduce new variation into the population.
Evolution is the process by which populations of organisms change over time, as a result of changes in the inherited traits that define them. This can occur through natural selection, genetic drift, mutation, gene flow, and other mechanisms, and can lead to the development of new species and the extinction of others. Evolution is driven by the interactions between organisms and their environment, and the resulting changes in their traits and behaviors over time.
¿What are Vertebrates?
Answers
\({\huge \underline{{ \fbox \color{red}{A}}{\fbox \color{green}{n}}{\fbox \color{purple}{s}}{\fbox \color{brown}{w}}{\fbox \color{yellow}{e}}{\fbox \color{gray}{r } }}}\)
They are further classified into: fish, amphibians, birds, reptiles and mammals.
I hope I've helped : )
1. Avocadoes also turn black when their inner flesh is exposed to air. There are three techniques can be used to keep the guacamole from turning black. What are they and how does each inhibit tyrosinase enzyme activity.
Answers
Answer:
Pat the guacamole down to give it a flat surface.
Pour a thin but visible layer of water or lemon/lime juice over the guacamole to form a barrier with the air.
Cover the dish with plastic wrap, pushing the wrap, so it is flush with the guacamole to prevent air pockets, or put the guacamole in a sealed tub.
Explanation:
endosymbiosis theory
Answers
Answer:
The endosymbiotic theory states that some of the organelles in eukaryotic cells were once prokaryotic microbes.
Which deep muscle flexes the trunk on the thigh?
A)splenius group
B)adductor longus
C)erector spinae
D)iliopsoas
Answers
The iliacus muscle is a component of the Iliopsoas, the main muscle responsible for thigh flexion and trunk flexion (as when bowing).
Option d is correct.
Whose muscles contract the trunk?The quadratus lumborum, erector spinae, semispinalis thoracis, latissimus dorsi, deep posterior spinal muscles, external and internal obliques, and psoas are the main muscles involved.
What muscle in the thigh flexes?Iliacus is a sizable muscle with a triangular shape that is lateral to the lower portions of the psoas major and minor muscles and covers the surface of the ilium. The iliopsoas muscle, which is the primary flexor of the thigh, is formed when its fibers combine with those of the psoas major muscle at the level of the inguinal ligament.
To know more about iliopsoas visit:-
https://brainly.com/question/28099475
#SPJ1
Jake has become very anxious ever since he started taking harder classes in his major.
The university's counselor diagnosed him with an anxiety disorder. Compare and contrast how the behavioral, humanistic, and cognitive approaches would view the origins and treatment of Jake's anxiety. Then, describe how psychologists view each of
the three approaches today."
Answers
The behavioral, humanistic, and cognitive approaches provide different perspectives on the origins and treatment of Jake's anxiety.
The behavioral approach would view Jake's anxiety as a learned response that has been reinforced over time. They might suggest that Jake's anxiety is a result of negative experiences or associations with his academic performance, leading to increased anxiety symptoms. Treatment would focus on identifying and modifying maladaptive behaviors through techniques such as exposure therapy and behavior modification.
The humanistic approach would emphasize Jake's self-actualization and personal growth. They might view his anxiety as a result of a discrepancy between his self-concept and the challenges he is facing in his major.
Treatment would involve providing a supportive and empathetic environment where Jake can explore his feelings and values, with the goal of helping him align his personal goals with his academic pursuits.
The cognitive approach would focus on Jake's thoughts and beliefs about his academic performance. They would suggest that his anxiety stems from negative and distorted thinking patterns, such as excessive self-criticism or catastrophic thinking.
Treatment would involve cognitive restructuring, helping Jake identify and challenge irrational thoughts, and developing more adaptive and realistic thinking patterns.
In contemporary psychology, these approaches are not seen as mutually exclusive, but rather complementary. Psychologists recognize that a multidimensional approach, integrating elements from different perspectives, can provide a more comprehensive understanding of psychological issues.
Treatment approaches often combine techniques from various approaches to address the unique needs of each individual, emphasizing a holistic and personalized approach to mental health.
For more such answers on Anxiety
https://brainly.com/question/14015501
#SPJ8
All of the following have been accomplished by space programs except-
A. placing semi-permanent structures in earth’s orbit
B. landing spacecraft on planets other than our own
C. sending spacecraft into orbit that allow us to study the universe in greater detail
D. develop technology and resources capable of sending the general population into space on a regular basis
Answers
Answer:
B
landing spacecraft on planets other than our own
We get energy from a variety of sources. Which one source would be responsible for emitting the most direct pollution?
es )
A)
Wind
B)
Solar
Biomass
D)
Fossil Fuels
Answers
In 1859, Darwin published On The Origin of Species. This book introduced a process by which organisms change over time, as those best suited to their environment survive to pass their traits to the next generation, this is known as __________.
natural selection
phylogeny
evolution
genetics
Answers
On The Origin of Species was published by Darwin in 1859. This book established the concept of "natural selection," the process whereby the organisms adapt throughout time as the features that are most appropriate for their environment survive and pass on to the next generation.
Explain about the book of "The Origin of Species"?After a five-year journey to South America and several Pacific Island locations to study plants, fauna, and fossils, English scientist Charles Darwin created the theory of natural selection.
With the publication of his best-selling book Just on Origin of Species in 1859, he popularized the concept of natural selection.The process by which communities of living things adapt and change is known as natural selection. A population's members are naturally varied, which means that they are all all distinctive in some ways. This variety indicates that some people have characteristics that are more environment-appropriate than others. Those that possess advantageous qualities, or adapted traits, are now more likely to live and procreate. The adaptable qualities are subsequently passed on to the next generation by these people.Thus, On The Origin of Species was published by Darwin in 1859. This book established the concept of "natural selection."
To know more about the The Origin of Species, here
https://brainly.com/question/12825654
#SPJ1
How many atoms are of hydrogen are in H₂O?
Answers
Answer:
2
How many atoms are in H2O?
Add the subscripts of the molecule to get the total number of atoms in it. Keep in mind that if a symbol is followed by nothing but space, its subscript is 1. A water molecule has three atoms in it.
Water has a chemical formula of H2O, which indicates that it contains two hydrogen atoms and one oxygen atom. By including the subscripts, I discovered this. Since oxygen has a subscript of 1, and hydrogen has a subscript of 2, there are a total of 3 atoms.
Thanks
- Eddie
how do i label cells,organ,organ system, organelles,tissue
Answers
Answer:
First is the cell then the tissue then the organelle then the organ then the organ system and finish with you
Explanation:
is that the answer? it it not tell me c:
Why is it that lipids, such as oil, do not readily mix with
water?
A Lipids are nonpolar molecules that are hydrophobic.
B Lipids are polar molecules that are hydrophilic.
C Lipids are nonpolar molecules that are hydrophilic.
D Lipids are polar molecules that are hydrophobic.
Answers
Answer:
Oils and fats not have any polar part and so for them to dissolve in water they would have to break some of water s hydrogen bonds. Water will not do this so the oil is forced to stay separate from the water.
Explanation:
An astronaut has a mass of 59 kilograms. What will her gravitational force be on the Moon? The gravitational attraction on the Moon is 1.62
- (1 point)
O95.58 N
O 578.2 N
60.62 N
36.42 N
Answers
The gravitational force (weight) on the moon is equal to 95.58 N. Therefore, option (A) is correct
What is the gravitational field on the moon?The gravitational field on the moon is measured by the radio signals which are emitted by the orbiting spacecraft. The principle of the Doppler effect is used and the line-of-sight spacecraft acceleration is measured in the small shifts of frequency of the radio signals.
The gravitational acceleration of the moon is equal to 1.62 m/s² which is 1/6th of the gravitational acceleration of the earth.
Given the mass of the astronaut, m= 59 Kg
The gravitational attraction on the Moon, g = 1.62 m/s².
The gravitational force on the moon, F = mg
The gravitational force of an astronaut on the Moon = 59 ×1.62 = 95.58 N
Therefore, the gravitational force of an astronaut on the Moon is 95.58 N.
Learn more about gravitational force, here:
https://brainly.com/question/24783651
#SPJ1
-What does an artery not do?
Pumps blood to the heart
Pumps blood away from the heart
Pumps blood to the arterioles
Pumps blood toward other organs or tissues
-What has very thin walls to allow the nutrients and gasses to be exchanged between the blood and cells?
Arterioles
Venules
Veins
Capillaries
-What is the first chamber the blood enters?
Right Atrium
Right Ventricle
Left Atrium
Left Ventricle
-What is not contained in our blood?
Blood Plasma
Leukocytes
Erythrocytes
Lymph
-What can prevent type II diabetes?
Medication
Diet and exercise
Extra sleep
A good doctor
-What is the responsibility of the respiratory system?
The absorption of nutrients.
The exchange of gasses.
The digestion of food.
Directing hormones.
-Which is not true about the diaphragm?
It is a sheet of muscle.
It is at the bottom of the chest cavity.
When we breath it contracts and goes down.
When we breath it contracts and goes up.
-What does not happen to air as it passes through the nose?
It is sampled for odors
It is warmed
It is thickened with mucus.
It is filtered by hair.
-What color does the hemoglobin make the cells?
White
Clear
Red
Blue
-What often uses ATP to produce many of the chemical reactions in our body?
Cells
Enzymes
Monomers
Polymers
-Which is not a way that ATP is used for mechanical work?
Movement at the cellular level.
Muscle contractions
Movement of the flagellum
Joining monomers to form a polymer
-Which statement is not true about Cellular Respiration?
It involves the breakdown of organic molecules to produce ATP.
It uses hydrocarbons.
The key to the process is in the transfer of hydrogen atoms and their electrons from one molecule to another.
When the hydrocarbons are mixed with oxygen they are converted into oxygen, water, and ATP.
-Which statement is not true about electron transport?
It is made up of proteins embedded in the mitochondria.
Each mitochondrion contain thousands of electron transport chains.
It produces 34 ATP.
It produces 2 ATP.
-Where does most of the energy that fuels living systems come from?
Carbohydrates
Protein
ATP
The sun
-Where does photosynthesis get its energy?
Sunlight and carbon dioxide
Sunlight and oxygen
ATP and carbon dioxide
ATP and oxygen
-After leaving the kidney where does the filtrate go?
The other kidney
The urinary bladder
The ureter
The urethra
-About how many nephrons are in a kidney?
One hundred
One thousand
One hundred thousand
One Million
-What organ filters our blood?
Bladder
Kidneys
Ureters
Liver
-What are the sacs inside of the chloroplasts called?
Stroma
Thylakoids
Grana
Lumen
-Where does the creation of oxygen occur?
Stroma
Chloroplasts
Grana
Lumen
Answers
Answer:
Arteries do not pump blood away from the heart.
Arterioles allow the nutrients and gasses to be exchanges between the blood and cells
Explanation:
Is this a function? (6,3), (5,8), (4,7), (1,5), (6,-9)
Answers
Answer:
nope cuz the 6 in the x position repeats :)
The question as shown in the photo
Answers
Answer:
its the first one
Explanation:
A trapezium of 8cm,11cm and height 4 cm find the area
Answers
Answer:
38 cm²
Explanation:
Formula :
Area of trapezium = 1/2 × Sum of parallel sides × Height
============================================================
Solving :
⇒ Area = 1/2 × (11 + 8) × 4
⇒ Area = 2 × 19
⇒ Area = 38 cm²
Write me a 10 minute speech about varicella zoster
Need it asap
Answers
Varicella Zoster is an infectious viral disease causing chickenpox in children and shingles in grown-ups. Inoculation plays a crucial part in avoidance and lessening complications.
Aspeech on Varicella-ZosterWomen and noblemen,
Nowadays, I would like to examine a vital and predominant viral disease known as Varicella Zoster. Varicella Zoster, commonly alluded to as chickenpox, is caused by a varicella-zoster infection. It fundamentally influences children, but can too affect grown-ups who have not been already contaminated.
Varicella Zoster presents as a profoundly infectious sickness characterized by a particular hasty, fever, and common disquietude. The infection spreads through coordinated contact or respiratory beads, making it effortlessly transmissible inside families and communities.
Whereas chickenpox is for the most part a gentle ailment in children, it can lead to more serious complications in grown-ups, pregnant ladies, and people with debilitated resistant frameworks. These complications incorporate pneumonia, bacterial contaminations, and in uncommon cases, neurological complications such as encephalitis.
Luckily, the improvement of a profoundly successful antibody has essentially diminished the frequency of Varicella Zoster around the world. Immunization not as it were secures people from the distress and potential complications of chickenpox, but too makes a difference anticipate the infection from spreading inside the community.
In any case, Varicella Zoster doesn't halt at chickenpox. Once the introductory contamination settles, the infection remains torpid inside the body and can reactivate a long time afterward, causing a condition known as herpes zoster, or more commonly, shingles.
Shingles are characterized by a difficult hasty that ordinarily happens in a single dermatome, regularly along the middle or confront. The reactivated infection can cause critical pain and inconvenience, enduring for weeks or indeed months. Moreover, complications such as postherpetic neuralgia, a persistent torment disorder, can happen, especially in more seasoned people.
To combat the chance of shingles, an isolated antibody called the shingles antibody or herpes zoster immunization has been created. This antibody not as it were makes a difference anticipate shingles but moreover diminishes the chance of postherpetic neuralgia.
In conclusion, Varicella Zoster, enveloping both chickenpox and shingles, could be a viral contamination that has critical suggestions for open well-being. We have made significant progress in reducing the burden of this disease through extensive vaccination efforts.
In any case, ongoing efforts to prevent Varicella zoster from returning to our communities and to protect powerless populations require prompt attention and vaccination.
Much obliged to you for your thought. Let's collaborate to ensure a better future for everyone.
Learn more about chicken pox here:
https://brainly.com/question/4024185
#SPJ2
In several fresh water lakes, grouos of sticklebacks were physically cut-off from the ocean population. This prevented the groups from interbreeding, and the freshwater populations gradually changed over time. How were they isolated? What were subpopulation changes
Answers
The isolation of stickleback populations from the ocean likely occurred through a process called allopatric speciation, which can happen when a physical barrier, such as a mountain range or a body of water, separates a population into two or more groups that can no longer interbreed.
As the subpopulations of sticklebacks continued to evolve separately, they likely became more genetically distinct from each other and from the ocean population. This could eventually lead to the formation of new species if the differences between the groups became significant enough that they could no longer interbreed, even if they were reintroduced.
Learn more about the stickleback population here.
https://brainly.com/question/9326041
#SPJ1
Which Texas ecoregion described below was formed due to weathering and erosion? A Edwards Plateau - home to rare organism that live in canyons B. Piney Woods - high density of vegetation, pines, oaks, and croplands with nutrient rich soil CC Crosstimbers - high concentration of trees, plains and parries with soil that drains water easily D Post Oak Savannah - transitional area of plant life ranging from grasslands to forests with fertile soll can yi
Answers
Answer:
d
Explanation:
because
¿Qué características crees que deben tener los métodos anticonceptivos para ser eficaces en el control de la natalidad?
Answers
Answer:
Los métodos anticonceptivos para ser eficaces en el control de la natalidad deben ser seguros para las personas que los utilizan, es decir, no tener efectos adversos, o al menos, la menor cantidad posible. Ser reversibles, es decir, que no generen infertilidad de por vida. Deben ser además fáciles de usar, cómodos y fáciles de conseguir, esto es, económicos. Además deben ser eficientes en su objetivo de evitar la concepción, que es para lo que fueron creados.
Explanation:
La tasa de eficacia de un método anticonceptivo se mide por la cantidad de embarazos que se producen cada 100. Esta parece ser la característica más importante, y si bien es una de las más importantes, hay que tener en cuenta todos los otros factores mencionados, es decir que la gente pueda acceder a ellos, sean cómodos, seguros y a un precio coherente.
The red wolf, Canis rufus, formerly widespread in the southeastern and southcentral United States, nearly became extinct in the late 1970s. Saved by a captive breeding program under the authority of the Endangered Species Act (ESA), it has been reintroduced in areas such as the Great Smoky Mountains National Park. Recent genetic evidence indicates that the red wolf may not be a separate species, but a hybrid of the coyote, Canis latrans, and the gray wolf, Canis lupus.
Though the original intent of the ESA was to protect all endangered groups-whether species, subspecies, or hybrids-the costs may be prohibitive. What criteria should be applied if we must decide which organisms to protect? Are there reasons to preserve hybrids, subspecies, or local populations of species when the species as a whole is not at risk?
Some issues and questions to consider:
The rationale behind protecting all endangered groups is the desire to preserve genetic diversity.
Each species, subspecies, and hybrid group may represent a unique mix of genes.
What is the value of any particular species and its genetically distinct subgroups?
How far are we willing (should we be willing) to go to preserve a genetically distinct group of organisms?
How should the costs of preserving genetic diversity compare with the costs of other public projects?
Submit a paper between 450 and 550 words that explain how can the main question be addressed.
Answers
Several factors should be taken into consideration when choosing which organisms should be protected under the ESA. The importance of maintaining genetic variety, the distinctiveness of each species, subspecies, or hybrid group, and the preservation costs should all be taken into account.
The health and resilience of ecosystems depend on sustaining genetic diversity. Genetic diversity guarantees that organisms have the adaptability they need to cope with environmental changes, such as those brought on by illness, climatic change, and other dangers. To ensure that we maintain genetic diversity, it is crucial to conserve all threatened groupings, including species, subspecies, and hybrids.
Every species, subspecies, and hybrid group consists of an original assemblage of genes that have changed over geological time. These genes have made it possible for these creatures to adapt to the particular ecological niches and habitats they have. Thus, protecting these distinctive genetic combinations is essential for keeping the ecological balance of ecosystems.
From species to species, different benefits might be derived from maintaining genetically diverse subgroups. While certain genetically unique subgroups might be essential for preserving the species' general health, others might only be of minor ecological importance. The importance of each genetically diverse subgroup must therefore be assessed, and preservation efforts must be prioritized accordingly.
The importance of preserving genetic variety, the distinctiveness of each species, subspecies, or hybrid group, and the costs involved with preservation should all be taken into account when choosing which creatures to protect under the ESA. The ESA was created with the intention of protecting all endangered groups, but in order for preservation efforts to be successful and long-lasting, practical factors must be taken into account. In the end, maintaining genetic diversity is crucial for sustaining the health and resilience of ecosystems, and in order to accomplish this aim, we should prioritizes efforts to protect all threatened groups.
Learn more about Genetic variety, here:
https://brainly.com/question/14676225
#SPJ1
Over a long period of time the process of deposition causes the formation of
Answers
Answer:
sedimentary rock
Explanation:
the process of deposition refers to rock and soil depositing itself onto a landform and hardening into rock, specifically sedimentary rock.
What are two ways that an organism can have a dominant phenotype ?
Answers
identify the functional group and IUPAC name for:
1. Alkenes
2.Alkynes
3.Alcohols
4.Aldehydes and ketones
5.Carboxylic Acids
Answers
1. Alkenes are hydrocarbons that contain carbon-carbon double bonds.
it has functional group c=c and the IUPAC nomenclature for alkenes includes the prefix 'ene' to parent alkane for example - ethene, propene, etc.
2. Alkynes are hydrocarbons that contain carbon-carbon triple bonds.
it has functional group c=c (triple bond) and IUPAC nomenclature for alkenes includes the prefix 'yne' to parent alkene for example- ethyne, propyne, etc.
3. Alcohol is a organic compound which contains functional group (- OH)
hydroxyl functional group bounded to satorated hydrocarbon.
IUPAC nomenclature for alkenes includes the prefix 'ol' to parent alkene for example- ethanol, propanol, etc
4. aldehyde are organic compounds in which a carbon atom shares a double bond with an oxygen atom, a single bond with a hydrogen atom, and a single bond with another atom or group of atoms
aldehydes are named as derivatives of the longest carbon chain containing the aldehyde group. Thus, HCHO is named as a derivative of methane, and CH3CH2CH2CHO is named as a derivative of butane. The name is formed by changing the suffix -e of the parent alkane to -al, so that HCHO is named methanal.
Ketones contain a carbonyl group −C(=O)− (which contains a carbon-oxygen double bond C=O). prefix 'one' os added in nomenclature for example, acetone.
5. a carboxylic acid is an organic acid that contains a carboxyl group (C(=O)OH)[1] attached to an R-group.
Forested floodplain wetlands benefit from periodic flooding from rivers. When floodwaters spill into the wetland, they bring water and nutrients and leave both behind. But humans have often cut off floodplains from rivers by building roads, levees, berms, etc. Think about what would happen if a river could no longer flood into these areas. How would the resulting increased amount of water and nutrients in the river affect soils, hydrology, and life downstream?
Answers
The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.
If a river can no longer flood into forested floodplain wetlands due to human interventions, it would have significant consequences for the downstream areas in terms of soils, hydrology, and life.Without periodic flooding, the increased amount of water and nutrients in the river would not be able to disperse and be deposited in the floodplain wetlands. As a result, downstream soils would experience a decrease in nutrient inputs, leading to decreased fertility and altered composition. The absence of regular flooding would disrupt the natural hydrological cycle, reducing the recharge of groundwater and altering the flow patterns in the river system. This could result in decreased water availability, increased erosion, and changes in the overall ecosystem dynamics downstream.The disruption of nutrient flows and hydrological patterns would also have a significant impact on the life forms downstream. Aquatic plants, fish, and other organisms that depend on floodplain wetlands for breeding, feeding, and shelter would face habitat loss and reduced food availability. This, in turn, could disrupt the food chain and impact the abundance and diversity of aquatic and terrestrial species in the downstream areas.The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.For more such questions on flooding
https://brainly.com/question/31808166
#SPJ8
explain why the roots of a plant grow in all directions if there is no gravity
Answers
Answer:
Roots apparently don't need gravity to place their directional skewing. They will grow away from a light source but of gravitational forces. Although plants on Earth do use gravity to help determine their direction of growth, it is clear that gravity is neither essential for root positioning nor the only factor controlling root growth patterns. In order to get water and other essential nutrients, the roots of plants grow in all directions if there's no gravity.