The ability to taste PTC is thanks to the presence of a minimum of one dominant allele for the PTC taste gene, so a nontaster genotype should be pure recessive(pp). If the frequency of pp is 45%, then the frequency of p would be:
pp=0.45
p= √0.45
p=67%
p+P= 100%
P= 100%- p
P= 100%-67%= 33%
The number of North American population that has is pure dominant(PP) genotype would be:
P=33%
PP= 33%^2= 10.89% = 0.1089 = 0.11
Why can some people taste the bitter chemical PTC?Some people have the ability to taste a bitter chemical called phenylthiocarbamide (PTC).
The shape of the receptor protein determines how strongly it can bind to PTC. Since all people have two copies of every gene, combinations of the bitter taste gene variants determine whether someone finds PTC intensely bitter, somewhat bitter, or without taste at all.
Thus, the ability to taste a bitter chemical called phenylthiocarbamide.
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HELP ASAP!!!
Here is Dan's address:
42 Oaksville Street, Apartment C
San Jose, California
USA
Imagine each of the five parts of Dan's address represents Earth, the Milky Way, the moon, the solar system, or the universe, based on their sizes. Which of the following parts of Dan's address would represent the universe?
A. California
B. 42 Oaksville Street
C. San Jose
D. USA
Water held within plants returns to the atmosphere as a vapor through a process called _______________.
A desirable intake of dietary fiber is _____ grams daily, according to the american dietetic association.
Answer:
A desirable intake of dietary fiber is 20-35 grams daily, according to the American Dietetic Association.
Explanation:
Dietary fiber has always been a part of a healthy, balanced eating lifestyle. Fiber has 2 types, soluble and insoluble. Soluble fiber is a gelatin-like substance when combined with water and when ingested, can help slow the travel of food in the gut, making you feel "full." Insoluble fiber or roughage is the bulk-forming type. It holds water in its structure, helping regulate the bowel movements.
Fiber, being a complex carbohydrate, can help lessen the risk of an increase of bad cholesterol and blood sugar. Examples of fiber-rich foods are whole grain products, barley, oats, grapes, etc.
What is the ozone layer? Where is it?what purpose does it have ?
Answer:
The ozone layers is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. he ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres (12 to 19 mi) above Earth. It's purpose is to protect us from the sun's ultraviolet rays which I said in the first sentence.
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MEDALSS!!
Which of these must occur during S phase of the cell cycle so that two daughter cells can be produced during M phase? (1 point)
A-The DNA must be replicated.
B-The chromosomes must be joined.
C-The cytoplasm must be separated.
D-The cell membrane must be expanded,
During the S phase of the cell cycle, DNA must be replicated to ensure each daughter cell receives an identical set of chromosomes, allowing the production of two genetically identical and diploid daughter cells during M phase.
The process that must occur during the S phase of the cell cycle to ensure that two daughter cells can be produced during M phase is the replication of DNA (A-The DNA must be replicated). During the S phase, each chromosome is replicated to produce two identical copies, known as sister chromatids, which are held together at the centromere by cohesin proteins. This replication results in each daughter cell receiving an identical set of chromosomes to the parent cell, ensuring that the daughter cells are diploid and genetically identical to the original cell.
The S phase is crucial as it directly impacts the outcome of the subsequent phases of cell division. Chromosomes need to replicate so that the nucleus and cytoplasm can later divide during M phase. If the DNA is not replicated during the S phase, the daughter cells would not have the complete set of genetic information, leading to various problems in cell function.
list three things that an astronomer can learn about a star by studying its spectrum.
A star's spectrum lines help to detect the various important studies related to the spectral lines of the stars. The temperature, composition and density of the star will help the astronomer.
What are the gases found in stars ?The major gases that are found in stars are hydrogen and helium which undergoes various reactions in order to produce energy and these energetic reactions are helpful in stars twinkling.
The spectral lines is also helpful in diagnosing the magnetic field of the star where the temperature of the star in which it is present will also be shown by the spectral lines and the density of the star that is the volume present in the star is also shown by the spectral lines.
Therefore the major of 3 things that will be diagnosed with the help of the spectral lines are magnetic field, temperature and density of the star atmosphere.
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In which structure would a zygote occur in within the female reproductive system? A. Uterus B. Uterine wall C. Ovary D. Fallopian tube
The radiosonde can be used to measure upper air temperature. Please select the best answer from the choices provided T F
Answer:
It's true
Explanation:
Radiosondes are used to measure temperature, pressure and humidity at heights above 30 km. They can also be used to determine the wind at heights. There are other radiosondes used to measure the sun's radiation, ozone distribution, air conductivity, etc. They are mainly used for research. Its units are hectopascal, degrees Celsius, etc.
What is the function of the structure identified by the red arrow?
The structure shown by the red arrow is cell membrane.
In biology, cell membrane refers to the thin layer, which develops the external boundary of a living cell. It has three primary functions, which are as follows:
1. It comprises channels and receptors, which permits particular molecules like nutrients, ions, metabolic components, and wastes to pass between the cell and the outside environment.
2. It prevents toxic components from entering the cell.
3. They distinguish essential but incompatible metabolic procedures conducted within the cell.
Where are most of the ATP molecules produced in cells
He diet-planning tool, myplate, is available only to healthcare professionals.
a. True
b. False
Common bread molds are:
It is determined that a client with heart block will require implantation of a permanent pacemaker to assist heart function. the client expresses concern about having an increased risk of accidental electrocution. how should the nurse respond?
During a care conference, a registered nurse reviews with the members the latest research on improving infant and maternal mortality rates. which quality and safety for nurses education competency does this nurse's action support?
a. patient centered care
b. teamwork and collaboration
c. evidence-based practice
d. quality improvement
During the process of cell division when does the nuclear membrane reform?
A. Prophase
B. Interphase
C. Telophase
D. Anaphase
Mitosis is divided into several phases, including prophase, prometaphase, metaphase, anaphase and telophase. As the intermediary phase between prophase and metaphase, prometaphase is sometimes considered part of prophase. The disintegration of the nuclear membrane into tiny vesicles signals the end of prophase and the beginning of prometaphase. When the envelope breaks down, the mitotic spindle fibers gain access to the DNA of the cell. The fibers then attach to the chromosomes at their kinetochores and begin moving to polar opposites of the cell.
The nuclear membrane re-forms in the phase of cell division known as telophase, separating the genetic material from the rest of the cell.
Explanation:The nuclear membrane re-forms during the telophase stage of cell division. In this phase, the chromatin that had condensed into chromosomes begins to relax and the nuclear envelope forms around each set of chromosomes to separate the nuclear DNA from the cytoplasm. This maintains a barrier that regulates the flow of substances into and out of the nucleus. Thus, option C: Telophase is the correct choice.
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Blood donations to the red cross are considered __________ products.
Blood donations to the Red Cross are considered public goods, which are products or services provided for the entire society's benefit. Such public goods are usually offered by governments or non-profit organizations.
Explanation:Blood donations to the Red Cross are considered public goods. The term refers to products or services that are provided for the benefit of all members of a society. Public goods are usually provided by the government or non-profit organizations such as the Red Cross. When an individual donates blood, that blood is available for anyone who needs it, regardless of whether they have also donated blood. Hence it's a public good - a valuable product that serves the common interest.
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What would you expect to see on the eeg record of a person who is engaged in an episode of sleepwalking?
Answer:
The correct answer is evidence of deep sleep (stage 4).
Explanation:
Sleepwalking or somnambulism is the condition found most commonly in the children between the ages 6 and 12. Though it is usually a harmless condition, however, spontaneous occurrences should be helped out with the help of a physician.
In the condition, the person goes from deep sleep to light drowsiness in a general sleep pattern. The individual generally encounters with few rounds of REM and non-REM sleep, or brisk movement of the eye.
which organelle would you expect to find in the cells of a tree leaf, but not in a bony fish?
If one strand of a dna double helix has the sequence agtactg, what will be the sequence of the other strand
Balanus is inferior to chthamalus in competing for space on rocks lower in the intertidal zone.
b.the removal of balanus shows that the realized niche of chthamalus is smaller than its fundamental niche.
c.these two species of barnacle do not show competitive exclusion.
d.the two species of barnacles do not compete with each other because they feed at different times of day.
Where in the eukaryotic cell does replication transcription rna processing and translation occur?
True or false mutations normally produce a beneficial change in an organism after many generations
What is the largest time period in the history of Earth?
Identify the two minerals shown that exhibit fracture as a dominant form of breakage
Among the properties used to identify minerals, we can mention the breaking tendency: cleavage or fracture. The two minerals shown that exhibit fracture as a dominant form of breakage are quartz and olivine.
Many properties of minerals are used to identify them, such as color, density, hardness, among others. In this case, we are talking about their breaking tendency.
How do minerals break?Minerals can cleave or fracture, which depends on how the sides separate and the formed angles.
A type of mineral breaks always in the same, and this is why the breaking tendency is useful to identify them.
CleavageThe mineral breaks in flat smooth planes.Cleavage direction and smoothness of surfaces are significant when identifying.FractureThe mineral break in irregular planes.In these minerals, there is no particular breaking direction.Image analysisAccording to this information, we can analyze the images and look for the answer.
Let us take, for instance, the potassium feldspat option. It shows flat and regular planes. So this is not a fracture, but a cleavage.
On the other side, quartz and olivine, do not seem to show any regular breaking side. The shape of these minerals is not well-defined and does not show any breaking direction.
The two minerals shown that exhibit fracture as a dominant form of breakage are quartz and olivine.
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What is the most likely consequence of open pit mining on plant life? a. a dramatic reduction in the variety of plant species b. an increase in the number of plant species c. the complete loss of plant life in the area occupied by the surface mine d. a temporary decrease in plant populations
Answer: c. the complete loss of plant life in the area occupied by the surface mine.
Open pit mining is a mining process that involves mining of earth surface, instead of underground layers. It is also, known as strip mining. It is done to extract ore and fossil fuels from the surface of earth. An open pit mining removes the subsurface soil along with vegetation growing on that surface.The mining site exhibits the mining pits, the soil in these pits changes constantly due to erosion. The soil looses it's fertility. This converts the mining site into a barren land.
Therefore, the complete loss of plant life in the area occupied by the surface mine is the most likely consequences of open pit mining on plant life.
The correct sequence of parts that carry cardiac impulses is
SA node > AV node > AV bundle (bundle of HIS) > Bundle branches > Purkinje fibers.
The sinoatrial (SA) node, located in the right atrium, produces an electric impulse by contraction. This impulse travels to the atrioventricular (AV) node, located at the partition of the atria. There is a tenth of a second delay in the impulse as the AV node contracts and sends the impulse through the bundle's branches to the ventricles. The bundle branches further divide into Purkinje fibers in the ventricle walls. When the impulse reaches the Purkinje fibers, they make the ventricles walls to contract.
The correct sequence of parts that carry cardiac impulses is SA node, AV node, bundle of HIS, bundle branches, purkinje fibers, ventricular muscle cells.
Sinoatrial node: Located in the right atrium, the SA node initiates the electrical impulses that regulate the heart's rhythm.
Atrioventricular node: Located near the center of the heart, specifically in the atrial septum, the AV node receives the electrical impulses from the SA node.
Bundle of His: After passing through the AV node, the electrical signal travels down the bundle of His, a pathway composed of specialized muscle fibers.
Bundle branches: The bundle of His divides into two main branches called the right bundle branch and the left bundle branch.
Purkinje fibers: The bundle branches further divide into smaller fibers known as Purkinje fibers.
Ventricular muscle cells: The Purkinje fibers stimulate the ventricular muscle cells, causing the ventricles to contract and pump blood out of the heart.
Thus, the electrical impulses originating from the SA node are efficiently transmitted to the atria and then to the ventricles, ensuring coordinated and effective contractions of the heart.
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A cellular process called ____________ is responsible for programmed cell death.
Which is the most efficient way to avoid DNA mutations from UV radiation?
A student constructs a Venn diagram to compare the organelles in plant and animal cells. Which organelle should be listed under “plant only” in the diagram
Answer:
Explanation:
Organelles present in plant cells and not in animal cells are:
Plastids (chloroplast, chromoplast and leucoplast)
Central vacuole (for storage)
Glyoxysome (present in seeds)
@Physiology HELP
1. Which of the following is needed for cellular respiration to occur? (2 points)
Sodium
Oxygen
Water
Nitrogen
2. Which of the following correctly compares fermentation and cellular respiration? (2 points)
Both provide ATP molecules, but only fermentation occurs when oxygen is present.
Both result in substantial ATP molecules and lactic acid production.
Cellular respiration produces more ATP molecules than fermentation.
Cellular respiration provides ATP molecules at a slower rate than fermentation.
3. What ultimately happens to the light energy captured during photosynthesis? (2 points)
It is used to produce glucose molecules.
It is turned into more chlorophyll for the plant.
It is used to release the energy from H2O.
It is put into ATP molecules for long-term storage.
Answer:
1. The correct answer would be oxygen.
Oxygen is used as the terminal electron acceptor in cellular respiration. It results in the production of water (byproduct) from oxygen.
2. The correct answer is the third option, that is, Cellular respiration produces more ATP molecules than fermentation.
Fermentation takes place in absence of oxygen which results in the production of lactic acid (or ethanol). In absence of oxygen, glucose does not break down completely due to which less number of ATP is produced.
Fermentation only produces 2 ATP molecules per glucose molecule. In comparison, cellular respiration produces 36-38 ATP per glucose molecule.
3. The correct answer is option third.
The light energy is used to phtolysis of water which releases oxygen and high energy electrons. These electrons are then used to produce NADPH and ATP. These NADPH and ATP are then used in dark phase to fix carbon into glucose.