Down syndrome is caused by having three chromosomes 21 instead of the usual two, a condition known as trisomy 21. Down syndrome is a genetic disorder that affects development and causes lifelong intellectual disability.
Individuals with Down syndrome have characteristic facial features, such as almond-shaped eyes and a flat nasal bridge, as well as poor muscle tone, heart defects, and an increased risk of infections and other medical conditions. The severity of these features varies widely among individuals with Down syndrome. Down syndrome is caused by a random error in cell division that results in an extra copy of chromosome 21. The risk of having a baby with Down syndrome increases with maternal age, although most babies with Down syndrome are born to mothers under 35 years old, simply because younger women have more babies.
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After common ragweed etched Japan a century ago and escaped their leaf beetle predators, populations of the plants evolved reduced investment in defense and greater investment in growth. During the past 30 years ragweed leaf beetles have appeared in some parts of mainland Japan. Which of the following scenarios is most likely now happening as a result?
A. Japanese ragweed is evolving greater investment in defense and greater investment in growth bc both defense and growth are beneficial
B. Japanese ragweed is evolving back toward greater investments in defense and reduced investment in growth as a result of selection by herbivore from beetles
C. Japanese ragweed is not evolving a new investment strategy bc it takes more than a couple of decades for a popular to evolve
D. Japanese ragweed is not evolving a new investment strategy bc the beetles no longer eat the plants
The outcome that is currently most likely is option B. As a consequence of herbivore choice via beetles, Japanese ragweed is reverting to an evolution that prioritises defence above expansion.
In the aster family, the category ragweed, or Ambrosia, has roughly 40 varieties of weedy perennials (Asteraceae). North America is home to the majority of species. The biggest source of hay fever in eastern and middle North America is ragweed pollen, that is produced in large quantities in early spring.
A creature which mostly consumes plants is a herbivore. The size of a herbivore can range from small insects like aphids to enormous, hulking rhinos. The food chain, which describes the species that consume other creatures in the wild, is largely composed of herbivores.
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How many branches of Ag are there?
18
1
8
7
Agronomy is one of 20 important branches of agriculture. Horticulture. Plant genetics and breeding.
What forms of agriculture are there?What are the Four Agriculture Types? The four different types of agriculture are shift cultivation, subsistence agriculture, pastoralism, & intensive farming. Agriculture has become the most pervasive activity despite its unpredictability.
What are the Seven agricultural sectors?Food and beverage production, food and beverage retail, food services, eating and drinking establishments, textile, garment, and leather goods, as well as forestry and fishing, are all allied industries to agriculture.
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14. Practice your base pairing by completing the strands of DNA below.
ATGACGCGAGATCGAGT
AGGTACGACGTCTAGCA
Answer:
TACTGCGCTCTAGCTA
TCCATGCTGCAGATCT
Explanation:
hope it was helpful
Which of the following is the smallest?
a. mitochondrion
b. prokaryote
c. virus
d. protein
e. robosome
Answer:
prokaryote
Explanation:
Prokaryote size range from 0.1 to 5.0 micrometers .
Compare and contrast spermatogenesis and oogenesis in human cells. Drag the appropriate items to their respective bins.
While oogenesis aids in the development of ova, spermatogenesis results in the production of sperm. A zygote is created when sperm and ova are fertilized, and this zygote then grows into an embryo.
What features of spermatogenesis and oogenesis are similar?Both spermatogenesis and oogenesis are types of meiosis, which is one of their main commonalities.
What features of spermatogenesis and oogenesis are similar?Both spermatogenesis and oogenesis are types of meiosis, which is one of their main commonalities. Additionally, the nomenclature of the various spermatogenesis and oogenesis cell stages are largely the same (-gonium, primary -ocyte, secondary -ocyte). The similarities virtually stop here, though.
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Which molecule has codons and is used to tell trna which amino acid is needed?
The molecule has codons and is used to tell tRNA which amino acid is needed is anticodon.
What is tRNA?tRNА is а type of RNА thаt is folded into а specific three-dimensionаl structure. It cаrries аnd trаnsfers аn аmino аcid to the polypeptide chаin thаt the ribosome is аssembling.
One end of the tRNА contаins аn аnticodon, а sequence of three nucleotides thаt is complementаry to the three nucleotides in the corresponding codon on the mRNА. Eаch аnticodon is specific to one аnd only one codon. By binding its аnticodon to the complementаry mRNА codon, the tRNА аcts аs аn аdаpter, bringing into position the correct аmino аcid thаt is needed for the polypeptide chаin.
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what are the limitations to earths mantle?
Answer:
The scale of mantle heterogeneities has been debated ever since the first observations of isotopic variations along mid-oceanic ridges1,2. Subsequent studies on lead and strontium isotopic variations along the Mid-Atlantic Ridge3–5 have shown that these isotopic compositions may vary with a major wavelength of ∼100–1,000 km. The immediate question is that of the scale (if any?) at which one may consider a piece of suboceanic mantle under a ridge to be homogeneous. We have studied two segments of oceanic ridges at the scale of a few kilometres. One of these portions of oceanic ridge, the CYAMEX zone in East Pacific Rise is typical, with a strongly ‘depleted’ chemistry. The other one, with an ‘intermediate’ chemistry, is the FAMOUS zone of the Mid-Atlantic Ridge. Our results show isotopic homogeneity for both zones even though small Pb variations persist on a small scale.
Humans have not been able to travel more than a few miles beneath Earth's surface because of the intense heat and pressure. For the same reasons, humans have not been able to travel into the mantle. Temperatures in the mantle range from 1600 degrees Fahrenheit at the top to 4000 degrees Fahrenheit near the bottom.
Braking just short of lockup is known as _____.
Braking just short of lockup is known as ABS (Anti-lock Brake System) braking.
Anti-lock Brake System (ABS) braking is a safety feature that is designed to prevent the wheels of a vehicle from locking up during heavy braking. This is known as "lockup" or "wheel lock." In a traditional braking system, when the driver applies the brakes hard, the wheels can stop rotating, which can cause the vehicle to skid or lose control. With ABS, sensors on the wheels detect when a wheel is about to lock up and automatically pulse the brakes to prevent it from happening. This allows the driver to maintain steering control and avoid skidding, even during hard braking, which helps to shorten the stopping distance and reduce the risk of a crash.
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Does choanoflagellates have cell covering or skeleton. Give an explanation.
Yes, it is true that choanoflagellates have cell covering of skeleton.
What are some of the characteristics of choanoflagellates?Choanoflagellates are group of free-living unicellular and colonial flagellate eukaryotes that are the closest living relatives of the animals.
Choanoflagellates, was regarded as most closely related to animals because some of their tentacles (with a rigid internal skeleton of bundled actin as in animal intestinal microvilli) are aggregated as a collar surrounding the cilium.
Choanoflagellates have a distinct morphology which is characterized by spherical/ovoid shape and single flagellum that is surrounded by around 30-40 microvilli. They are between 3 and 10 µm in diameter.
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Which process results in unique gamete cells?
Meiosis, a type of cell division results in the unique gamete cells.
Meiosis is the process of cell division where one parent cell gives rise to 4 daughter cells. In this, the number of chromosomes are reduced to half than that in the parent cell and this is why meiosis is also called the reductional division. Meiosis can be accomplished in two phases: meiosis I and meiosis II.
Gametes are the reproductive cells of an organism. There are two types of gametes: the male gamete called the sperm and the female gamete called the egg or ovum. These are produced by the process of meiosis sand therefore are haploid in nature.
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How does the body regulate the amount of carbon dioxide in the blood?
Oit instructs the liver to absorb or release carbon dioxide by sending signals through the nervous system
O it controls the rate of breathing by sending signals through the nervous system
O it instructs the liver to absorb or release carbon dioxide by sending hormones through the blood
O it controls the rate of breathing by sending hormones through the blood
According to the research, the correct answer is option B. The body regulates the amount of carbon dioxide in the blood since it controls the rate of breathing by sending signals through the nervous system.
What is breathing?It is the function of the body through which gas exchange (O2 and CO2) takes place in the cells, that is, its main objective is to allow an adequate supply of oxygen and removal of carbon dioxide.
In this sense, human beings take in oxygen through inspiration and exhale carbon dioxide, which is a waste product that is produced in the body and must be eliminated through the lungs.
Therefore, we can conclude that through breathing the carbon dioxide that comes from cellular metabolism is eliminated, that it is necessary to release the CO2 that accumulates in the tissues due to its toxicity, thus the correct option is B.
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The goblet cells secrete mucus
Describe the role of mucus and cilia in the trachea ?
Which physical adaptations increase an organism's chances of finding food?
the armored plates of an armadillo
the bright black feathers of a male ostrich
the thin, needle-like beak of the hummingbird
the color of grasshoppers
Hummingbirds have evolved to survive in locations with harsh winters and limited food sources. They do this by lowering their metabolism and entering a dormant state.
How is metabolism carried out?
Metabolic process: converting food into energy. Metabolism is the term used to describe the process by which the body transforms food and liquids to energy. Calories from beverages and foods mix with oxygen during this process to produce the energy the body requires. Even when in rest, a body still needs energy to perform all of its activities.
Is a rapid metabolism beneficial?
Benefits of having a fast metabolism include the ability to burn carbohydrates more rapidly than someone who has a high metabolism. A rapid metabolism might make it challenging to gain weight or maintain a healthy diet, though.
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A conservation biologist was studying a population of deer in a wooded area. She noticed a sharp decrease in the population in 2003.
Which is the least likely explanation for the decrease in the deer population?
A.The number of coyotes in the area decreased.
B. A disease infected the deer population.
C. Mountain lions were introduced to this area.
D. More hunters visited the area in 2003.
E. The deer could not find enough food.
a couple with no children want to determine the probability that they could have 7 girls in row like their neighbor
According to the given statement 128 possibilities are possible out of 27.
What is the likelihood that all of the children will be female?To begin with, since there is a 50% chance that a child will be a girl, there is a 1/8 possibility that all three will be females. Make a list of every outcome alternatively, arranged by age.
A set of seven objects has how many permutations?The provided collection of letters (a, b, c, d, e, f, and g) has seven possible permutations. and is 5040. Let's look at how we'll apply the ideas of permutation and combinations to get the number of configurations.
According to probability
probability = 1/2^7
= 1/128
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The complete question is -
What is the probability If a family a couple with no children want to determine the probability that they could have 7 girls in row like their neighbor ?
ABNORMALITIES OF HEART VALVES CAN BE DETECTED MORE ACCURATELY BY AUSCULTATION THAN BY ELECTROCARDIOGRAPHY. WHY IS THIS SO?
Heart valves is responsible for causing extra heart sounds that can be heard with a stethoscope. ECG is responsible for measuring electrical activity.
Electrocardiogram (ECG) is recorded touching the body surface and registers the differences in electrical potential generated by the heart. These signals are recorded on basis of action potentials generated by millions of cardiac cells and their activation sequence .
An electrocardiogram (ECG) is normal test that can be used to check rhythm of heart's and other electrical signals . in this process Sensors gets attached to the skin for detection of the electrical signals each time your heart beats.
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What is social perspective in sociology?
The sociological perspective, which holds that our social origins impact our attitudes, conduct, and life chances, is at the center of sociology. In this aspect, we are not simply individuals, but social creatures who are profoundly entwined with society.
The sociological viewpoint is a method of comprehending human behavior by situating it within its larger social context. C. Wright Mills defined sociology as the junction of biography (the individual) and history (social factors that influence the individual).
Problems such as eating disorders, divorce, and unemployment are examples. Public issues are societal problems that impact many people and have their roots in a society's social structure and culture. Thus, difficulties in society assist to account for problems that individuals face.
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Can a man with type AB blood be the biological father of a child with type O blood?
Yes, it is possible for a man with type AB blood to be the biological father of a child with type O blood. This is because blood type is determined by genes that are inherited from both parents.
Type O blood is determined by the absence of A and B antigens on the surface of red blood cells. So, if the mother of the child has type O blood, the child will also have type O blood.
However, If the mother of the child has blood type A or B, the child will inherit one of the antigens from the mother and the father can contribute the gene for O blood, in this case, the child will have type A or B blood.
A man with type AB blood carries both A and B antigens, but also carries the gene for O type, so it's possible for him to pass the O gene to the child.
Blood type inheritance is a complex process involving multiple genes, so it's always recommended to confirm paternity through a DNA test.
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What process during the water cycle would cause
the air in the bag to appear cloudy?
A. Boiling
C.
Evaporation
B. Freezing
D. Precipitation
Answer: D
Explanation:
Precipitation is the process during the water cycle that would cause the air in the bag to appear cloudy. Precipitation refers to the process in which water falls from the atmosphere to the Earth's surface in the form of rain, sleet, hail, or snow. When precipitation falls, the water droplets, or ice crystals in the case of sleet or snow, become suspended in the air, making it appear cloudy.
Which is the BEST summary of Passage 1?
Officials care about their image when oil spills
occur. They use dispersants to push oil deeper into
the water, which causes more damage.
Boats are sometimes responsible for oil spills.
Dispersants can break up oil, but skimming and
burning are sometimes better choices.
Oil spills have consequences for wildlife and
people. Cleanup methods have downsides, which
means it is often best to leave spills alone.
Spilled oil makes a shiny layer on water that can
cover birds and enter food chains. Areas affected
by oil spills can recover.
The summary of the passage is that the oil spill has to be cleaned through effective methods otherwise it can damage the food chain by blurring bird's vision forming shiny layer on water surface.
Oil skimming: how effective is it?Before disposing of wastewater, oil skimmers are conceivably the most efficient and economical way to remove oil. Despite these benefits, not all power plants have oil skimmers.
Who is accountable for oceanic oil spills?More than 90% of the chronic oil slicks in the ocean are caused by human activity, a team of Chinese and American scientists who built the first worldwide map of such slicks discovered.
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a point to remember about cleaning is
Cleaning is the method involved with eliminating food and different kinds of soil from a surface. At the same time, disinfecting is the most common way of diminishing the number of microorganisms on that surface to safe levels.
Cleaning - eliminates soil, dust, and different soils from surfaces. Disinfecting - eliminates microscopic organisms from surfaces. Sanitizing - kills destructive microscopic organisms and infections from surfaces. Disinfecting - kills all microorganisms from surfaces.
Whenever utilized at its original capacity (undiluted), it will leave a buildup that makes a film on a superficial level. Legitimate weakening truly matters so it is vital that sanitizers are being put through a substance administering framework to guarantee they are being utilized accurately, and to their best potential.
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the immune system of an individual who is allergic to dust mite waste produce
Answer:
The answer to your question is ⇔ (1) Specialized chemicals that mark dust mite waste for destruction.
Explanation:
I hope this helps and have a wonderful day!
Answer:
Explanation:
A dust mite allergy can range from mild to severe. A mild case of dust mite allergies may cause an occasional runny nose, watery eyes, and sneezing. in severe cases, the condition may be ongoing (chronic) resulting in persistent sneezing, cough, congestion, facial pressure, an eczema flare-up, or severe asthma attack.8. Tell the difference between mammalian and non mammalian blood:
Answer: Mammals:they have hair, they give birth to babies,warm blooded,have sweat glands. Examples:bear,whales,human beings,etc. Non-mammals:they don't have hair or fur,lay eggs,cold blooded.
diferencia entre epidemia pandemia y endemia
La diferencia entre epidemia, Pandemia son endémicas:
Epidemia: Una epidemia ocurre cuando una enfermedad infecciosa se propaga rápidamente a muchas personas.
Pandemia: Una pandemia es un brote global de enfermedad que afecta a un gran número de personas en varios países o continentes.
Endémica: Una endémica es una enfermedad que está constantemente presente en una determinada población o área geográfica.
¿Qué es epidemia?
La epidemia es la ocurrencia de una enfermedad que afecta a un gran número de personas en una población dada durante un cierto período de tiempo. Se diferencia de una epidemia, que es un brote de una enfermedad en particular entre un gran número de personas en un área en particular, generalmente dentro de un corto período de tiempo. La epidemia generalmente es causada por una enfermedad contagiosa, como un virus o una bacteria, y puede propagarse rápidamente a través de regiones geográficas o incluso continentes.
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I really need help I'm about to fail biology. I included the background story and question.
Frequency of tuskless elephants in females: 78/260 = 0.3 (30%), Frequency of tuskless elephants in males: 27/270 = 0.1 (10%) and Overall frequency of tuskless elephants: (78+27)/530 = 0.2 (20%).
What is Frequency?Frequency is a measure of how often a periodic event occurs in a given period of time. It is typically measured in hertz (Hz), which is the number of occurrences of a repeating event per second. Frequency is an important concept in physics, engineering, and many other fields of study. Frequency can also be used to describe the rate at which a signal or waveform is changing over time. In audio applications, this is often referred to as the pitch of a sound. Frequency can also be used to describe the rate of a periodic process or system, such as a heartbeat or a vibrating string.
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What does sociological perspective show us?
The sociological perspective shows that people's behavior is shaped by the groups to which individuals belong and by the social interaction that occurs within those groups.
The sociological perspective directs people to see the link between social content and the behavior of individuals. It means that a sociological perspective is a method that understands people's behavior within a broader social context that influences behaviors, attitudes, and life chances.
Thus, the sociological perspective reveals that an individual's behavior is influenced by interactions they make with the people and the social context surrounding them.
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What goes first with organ ,epithelial tissue ,epithelial cell and organ system
Epithelial tissue lines the organs of the body, including the lungs, heart, and stomach.
Is epithelium an organ system?Epithelium, endothelium, and mesothelium are three types of epithelial cell sheets that line your internal organs, and body space and form the outer layer of your skin. Epithelium generally lines alleyways that are open to the external environment, such as your respiratory area and digestive system.
Glandular epithelial tissue is also established as part of the glands, including hormone-manufacture organs like the liver, pancreas, and spleen. Epithelial tissues are widespread all around the body. They form the covering of all body surfaces.
So we can conclude that Simple epithelial tissues are normally classified by the shape of their cells.
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What does the notation RR mean to geneticist Brainly?
Answer:
Homozygous Dominant
Explanation:
What is the exact amount of the energy input required to begin the process of cellular respiration?
Answer: The process of cell respiration has an input cost of 2 ATP and a total possible output of 38 ATP per molecule of glucose oxidized.
Explanation:
5. Which of the following is an example of a home device that
uses negative feedback?
A. blender
B. corkscrew
C. microwave oven
D. thermostat