Answer:
25% or 1/4
Explanation:
The cross in this question involves a gene coding for the possession or not of Huntington's disease in humans. The dominant allele is denoted by (H) while the recessive allele is denoted by (h). The possession of the dominant allele by an individual means the possession of the Huntington's disease.
In a cross between two heterozygous parents i.e. combination of both dominant and recessive alleles (Hh). Four possible offsprings will be produced with genotypes HH, Hh, Hh and hh.
The genotypes HH, Hh and Hh will phenotypically possess the Huntington's disease while the hh genotype will not possess the Huntington's disease. Hence, the chance of having a child without the disease is 1/4 or 25%.
The structure of an atom is best described as:
1. neutrons in orbit about a nucleus of protons bound to electrons.
2. electrons and neutrons in orbit about a nucleus of protons
3. protons and neutrons in orbit about a nucleus of electrons .
4. electrons in orbit about a nucleus of protons and neutrons
Answer: Option (4) is the correct answer.
Explanation:
An atom consists of three types of sub-atomic particles which are electrons, protons, and neutrons.
Protons have a positive charge and neutrons have no charge. Whereas electrons have a negative charge.
Protons and neutrons are placed inside the nucleus of an atom. On the other hand, electrons revolve around the nucleus of the atom.
Thus, we can conclude that the structure of an atom is best described as electrons in orbit about a nucleus of protons and neutrons.
You come to work one morning to discover the electricity has gone off in the refrigerator in the laboratory. This refrigerator houses the reagents needed to perform the laboratory tests and you have a full day of patients scheduled.
1. How will you proceed?
2. Is there a way to determine whether or not the reagents are still acceptable? Why or why not?
3. How could this have been prevented?
Which of the following icons is used to represent a female carrier of a disease?
A half-filled circle
A half-filled square
A completely filled circle
A completely filled square
. You are exploring and observe some hardened sediment that contains the impression of a bone. This is an example of what type of fossil? (2 points)
A. Mold
B. Petrified
C. Imprint
D. Trace
A bar magnet is a permanent magnet, while an electromagnet is a temporary magnet. Why is an electromagnet temporary?
Answer:
The magnetic field of electromagnets depend on current
Explanation:
An electromagnet is a temporary magnet because it do no have any inbuilt source of magnetism. The electricity flowing through it produces magnetic force and as soon as this electric force is removed , the magnetic force also vanishes.
Thus, the magnetic field of electromagnet depends on the potential for an electric field.
Wherever there is electricity, there is a magnetic field, and wherever there is magnetism, there is potential for an electric field.
An object that possesses a magnetic field and exerts a type of magnetic force are called a magnet. Magnets can be temporary or permanent based on their properties.
The difference between the magnet is due to the current.
What are bar and electromagnet?The flow of an electric current produces an electromagnet, the electromagnet remains working only when the current is flowing, when the current is turned off, the electromagnet loses its properties.
The material, coiling and the amount of current determine the nature of the electromagnet. While bar magnets are small magnets used for attracting metallic objects.
Therefore, an electromagnetic field relies on the potential of an electric field.
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Predict where the Katydid would hide from danger? Draw a picture of what you predict, help please
How does increased soil enrosion affect the fish population in a forest after wildfire
The clearance of forests causes great impact on both the environment and humans. These include loss of nutrients availability, soil erosion, flooding, water pollution, hotter and drier weather conditions, global warming, as well as reduction in biodiversity.
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What would happen if the concentration of H ions were higher inside the mitochondrion than outside the mitochondrion when the channel opened
Answer:
If the concentration of H ions were higher inside the mitochondrion than outside the mitochondrion then the H ions would move to outside the mitochondrion to equalize the pH of both inner and outer side through the opened channel.
In mitochondria H ions usually move from mitochondrial matrix to inner membrane of mitochondria by active transport. This generates an electrochemical gradient due to the low pH in the mitochondrial membrane than in matrix.
This gradient allows the H⁺ to flow back into the matrix through ATP synthase which generates energy in the form of ATP and equalize the pH both the side.
The organism Euprymna scolopes is most likely related to
Which structure has the least effect on tne ability of a virus to infect and replicate in a host cell
The ribosome structure has the least effect on the ability of a virus to infect and replicate in a host cell.
What is a ribosome?A ribosome is an intercellular structure made of both RNA and protein, and it is the site of protein synthesis in the cell. The ribosome reads the messenger RNA (mRNA) sequence and translates that genetic code into a specified string of amino acids, which grow into long chains that fold to form proteins.
Viruses do not have their own ribosomes as they hijack the ribosomes of the human cell to make more virus it may be possible to exploit the unique methods by which viruses take over the human ribosomes to create novel anti-viral drugs.
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How is carbon dioxide added to the atmosphere?
Help with these five questions anyone it would be very helpful?
Changes in a DNA sequence that affect genetic information are known as
A)expressions.B)hybridizations.C)intercalations.D)mutations.
Answer:
Mutations ( usatestprep )
A population of rodents becomes stranded on a remote island. Eventually, the population reaches the island’s carrying capacity. At this point, the birth and death rates are A. relatively equal. B. crashing. C. density dependent. D. density independent.
A population of rodents becomes stranded on a remote island. Eventually, the population reaches the island’s carrying capacity. When this happens the population growth curve becomes flat as shown in the image. At this stage the change in population becomes zero with time. The logistic growth curve for the population growth is given by the formula,
[tex] N_t = N_0 \times (1 + \frac{r-d}{k})^t [/tex]
Where, r is the growth rate, d is the death rate, and k is the carrying capacity.
When, [tex] N_t - N_0 = 0 [/tex]
[tex] N_0 \times (\frac{r-d}{k})^t = 0 [/tex]
[tex] \frac{r-d}{k} = 0 [/tex]
[tex] r = d [/tex]
The growth rate equals the death rate of the rodents.
The answer is (A).
Does anyone know these
5. How do bacteria contribute to an ecosystem? (1 point) Some bacteria reduce the number of parasites infesting organisms in an ecosystem. Some bacteria provide nutrients and raw materials for organisms in an ecosystem. Some bacteria are a primary food source for most of the consumers in an ecosystem. Some bacteria provide protection from viral infections for the organisms in an ecosystem. 6. Which of the following roles of bacteria is not a benefit to human bodies? (1 point) digesting food preventing diabetes making vitamins acting as a pathogen 7. Two ways bacteria cause disease is by using the cells of the organism they infect as food and by (1 point) making antibiotics. releasing toxins. releasing viruses. releasing disinfectants. 8. Antibiotics are often effective treatments for diseases caused by (1 point) bacteria. viruses. some bacteria and some viruses. all bacteria and all viruses. 9. What is one reason biologists have difficulty classifying proti
Bacteria contribute to ecosystems through nutrient cycles, symbiotic relationships, and reducing parasites. Some bacteria have beneficial roles in the human body, but others act as pathogens. Bacteria can cause diseases by using host cells as food and releasing toxins.
Explanation:Bacteria play important roles in ecosystems by contributing to nutrient cycles, providing food for consumers, and reducing the number of parasites in organisms. They can also form symbiotic relationships with other organisms, such as nitrogen-fixing bacteria living on the roots of legumes. However, some bacteria are pathogenic and can cause diseases in humans and other organisms.
In terms of the human body, bacteria can have both beneficial and harmful effects. Some bacteria aid in digestion, produce vitamins, and contribute to the development of the immune system. However, certain bacteria can act as pathogens and cause diseases.
Bacteria can cause diseases by using the cells of the organism they infect as food. They can also release toxins that harm the host organism. Antibiotics are often effective against diseases caused by bacteria, but not all antibiotics work against all types of bacteria.
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which of these is a concern about the use of biotechnology
What is the range for the following set of measurements? 27°C, 12°C, 31°C, 19°C, 23°C, 11°C, 17°C
if a zygote has 4 chromosomes,the somatic cells formed from it have how many chromosomes?
If a zygote has 4 chromosomes, The somatic cells formed from it have how many chromosomes 4.
What are chromosomes?When a cell is not dividing, chromosomes cannot be seen in the nucleus, not even under a microscope. However, during cell division, the DNA that makes up chromosomes gets more compactly packed and becomes visible under a microscope.
The majority of what scientists understand about chromosomes comes from studying them during cell division.
The centromere, a point of constriction on each chromosome, separates the chromosome into its two "arms." The "p arm" refers to the chromosome's short arm. The "q arm" refers to the long arm of the chromosome. Each chromosome has a centromere.
Therefore, If a zygote has 4 chromosomes, The somatic cells formed from it have how many chromosomes 4.
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PLZ HELP SCIENCE HOW DID GENETIC ENIGINEERING HELP PPL WITH DIABETES
The lives of individuals with insulin-dependent diabetes have been improved by genetic engineering, which allows for the low-cost, large-scale production of human insulin, reducing allergic reactions and enhancing treatment effectiveness.
Genetic engineering has notably improved the lives of individuals with insulin-dependent diabetes through the development of recombinant DNA technology. This innovation allowed for the production of human insulin in E. coli bacteria, circumventing the previous reliance on pig insulin, which elicited allergic reactions in some patients due to slight differences in protein structure between human and pig insulin.
Since its initial development in 1978, the process has been refined to enable large-scale and low-cost production of human insulin. This advancement has made insulin therapy more accessible and reduced the risk of allergic reactions, thus improving the quality of life and treatment effectiveness for those managing their diabetes with insulin injections.
The overall direction of the major cold ocean currents is largely A) east to west. B) west to east. C) higher to lower latitudes. D) lower to higher latitudes.
Answer: C
The overall direction of the major cold ocean currents is largely from higher to lower latitudes. The currents flow in the high latitudes from the Polar region all the way to the lower latitudes in the warm Equator region where currents have lower surface temperature and bring cold water into warm water areas.
Answer:
The answer is "C"
Explanation:
Higher latitudes, which are closer to the poles, are colder than lower latitudes. Cold ocean water flows from higher to lower latitudes , as cold water moves in to replace rising warm water closer to the equator. The shapes of the continents also determine the actual paths of the currents.
What is one criteria that must be met in order for an ecosystem to be stable
Which factor can increase the potential energy of an object?
Decrease in speed
Decrease in density
Increase in temperature
Increase in height from the ground
how is an evasive species introduced to a new ecosystem?
How is an invasive species introduced to a new ecosystem? An invasive species is introduced to an ecosystem through a Human activities. Option B
Usually, human activities like trade, transportation, agriculture, or intentional introduction for a variety of uses including ornamentation or pest control bring invasive species into newly formed habitats.
Invasive species are largely dispersed into new habitats as a result of human-mediated processes such the inadvertent release of organisms from ships' ballast water, unintentional transit on cargo, and intentional introduction for landscaping or agriculture. Thus, b) Human actions is the right response.
Missing parts;
How is an invasive species introduced to a new ecosystem? An invasive species is introduced to an ecosystem through a _______.
a) Natural migration process
b) Human activities
c) Climate change event
d) Random chance occurrence
Invasive species enter new ecosystems accidentally via transport, intentional introduction, escape from captivity, ballast water exchange, or deliberate release.
An invasive species is typically introduced to a new ecosystem through various human-mediated activities. Here are some common ways they can be introduced:
1. Accidental Transport: Often, invasive species hitch a ride unknowingly on ships, planes, vehicles, or even on goods being transported internationally. They may hide in cargo, cling to the hulls of ships (known as hull fouling), or be transported in soil, plants, or water.
2. Intentional Introduction: Sometimes, species are deliberately introduced for various purposes such as agriculture, landscaping, aquaculture, or even as pets. These introductions can lead to unintended consequences when the introduced species outcompetes native species or disrupts the ecosystem.
3. Escape from Captivity: Invasive species can escape from captivity, whether from zoos, aquariums, botanical gardens, or private collections. These released individuals may establish populations in the wild and become invasive.
4. Ballast Water Exchange: Ballast water, used to stabilize ships at sea, often contains a variety of organisms picked up in one location and discharged in another. When ships exchange ballast water in different ports, they can inadvertently introduce invasive species to new ecosystems.
5. Deliberate Acts: Sometimes, individuals intentionally release species into the wild. This might occur due to ignorance about the potential harm of releasing non-native species, or it could be a deliberate act for purposes such as pest control or hobbyist interests.
Once introduced, invasive species can rapidly proliferate and spread, often outcompeting native species for resources like food, habitat, and space. They can disrupt ecological balance, decrease biodiversity, alter habitats, and even cause economic damage. Managing and controlling invasive species is crucial to preserving native ecosystems and biodiversity.
When scientists take genes from one organism and combine it with another organism it is called _______________.
Question 8 options:
A) gene control
B) selective breeding
C) genetic engineering
D) Double helix
Answer:
im pretty sure its gene control
Explanation:
What would happen to seasonal temperatures if the tilt of the earth was less?
Answer: When the Earth is tilted toward the sun the Northern Hemisphere is in the warm season and when the Earth is tilted away from the sun the Northern Hemisphere is in the cool season. ... There would no longer be season as we know them. The temperature and precipitation pattern would not vary much.
Explanation:
In which 3 organs does a plant store its starch in?
Answer:
The starch in non-photosynthetic tissues, such as seeds, stems, roots or tubers, is generally stored for longer periods and regarded as storage starch.
which action can both humans and flatworms do?
a. form images from sensory signals
b. see the shape of an approaching predator
c. smell fresh food
d. communicate verbally
An action that can both humans and flatworms do is, to smell fresh foods.
What do you mean by Flatworms?Flatworms may be defined as an organism that belongs to the phylum Platyhelminthes and possesses soft-bodied invertebrate usually much-flattened acoelomate.
The sensory receptors of flatworms are not much developed due to a lack of spinal nerves. They are not able to communicate verbally as well.
Therefore, an action that can both humans and flatworms do is, to smell fresh foods.
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How do environmental factors contribute to evolution by natural selection?
At which temperature does the motion of atoms and molecules stop?
0°C
0 C
0°K
0 K
Answer:0 K
Explanation:
The motion of atoms and molecules stops at 0 K (zero Kelvin), which is the last option, as at this temperature, all matter would have zero entropy and no heat energy. However, it is impossible to actually reach absolute zero in reality.
what is 0 kelvin?The temperature at which the motion of atoms and molecules stops is known as absolute zero. It is equivalent to 0 kelvin (0 K), -273.15 degrees Celsius (-273.15 °C), or -459.67 degrees Fahrenheit (-459.67 °F). At absolute zero, atoms and molecules have no thermal energy, and they stop vibrating or moving. However, achieving absolute zero is practically impossible because it requires the complete elimination of all forms of energy, including all internal energy and the energy of motion. Scientists have been able to achieve temperatures very close to absolute zero, but not precisely at it.
Hence, the motion of atoms and molecules stops at 0 K (zero Kelvin), which is the last option, as at this temperature, all matter would have zero entropy and no heat energy. However, it is impossible to actually reach absolute zero in reality.
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How canna person donate blood and never run out of it?
A)Blood componentes are continuously pumped by the heart.
B)Blood componentes are continuously circulated through the blood vessels.
C)Blood componentes are continuously produced in the bone marrow.
D) Blood componentes are continuously digested by enzymes.