Mutations is one source of genetic variation. Genetic variation is a result of sexual reproduction that leads to the creation of new combinations of genes.
Genetic variation is created in meiosis by the two mechanisms that is independent assortment of gametes and genetic recombination.
Skin color, hair color, dimples, freckles and blood type are examples of genetic variations that can occur in humans. Examples of genetic variation in plants are modified leaves of carnivorous plants and the development of flowers that resemble insects to lure plant pollinators.
Processes of meiosis results in four unique haploid cells that result in combinations. Independent assortment in which the chromosome inherited from either the father or mother can sort into any gamete and produces the potential for genetic variation.
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researchers collected seeds from a certain wild plant and planted them in groups of kin (seeds of the same mother plant) or non‑kin (seeds from different plants). each group of four seeds was planted either together in one pot or in a cluster of four pots that contained the same volume of soil. after eight weeks, the researchers measured the amount of roots each plant had produced. they found that related plants grown together in one pot produced smaller root systems so as not to compete with one another. plants grown in separate containers and non‑kin plants grown in a single container had 15% more roots.
It is an experiment.
Experiment to demonstrate that related plants grown together in one pot produced smaller root systems in order to avoid competition, plants grown in separate containers, and nonkin plants grown in a single container had 15% more roots.
The complete question is:
Researchers collected seeds from a certain wild plant and planted them in groups of kin (seeds of the same mother plant) or non‑kin (seeds from different plants). each group of four seeds was planted either together in one pot or in a cluster of four pots that contained the same volume of soil. after eight weeks, the researchers measured the amount of roots each plant had produced. they found that related plants grown together in one pot produced smaller root systems so as not to compete with one another. plants grown in separate containers and non‑kin plants grown in a single container had 15% more roots. Was this a sample survey, an observational study, or an experiment? an observational study an experiment a sample survey.
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describe how a cell might make one type of protein and not make another type
Answer: Structures found in the cytoplasm, called ribosomes, perform the process of translation. Reading the mRNA's nucleotides three at a time, these structures assemble strands of amino acids, the molecules that make up proteins. Each nucleic acid triplet corresponds to a particular amino acid.
In a cell the ribosome can make protein by the process of translation process where it read the mRNA nucleotide sequence at a time which assemble the strands of amino acids, the molecules that make up proteins. as each ribosome involve in synthesis of specific amino acids at a time, thus it can not make another protein
what is the function of ribosome ?A ribosome is a complex molecular machine present inside the living cells that produce proteins by a process called protein synthesis or translation.
The most important ribosome function are It gather and assemble all amino acids to form proteins which are essential to carry out cellular functions, The DNA synthesize mRNA by the process of DNA transcription.
The mRNA synthesis occur in the nucleus and transported to the cytoplasm for protein synthesis, the subunit of ribosome present in the cytoplasm are bound around mRNA polymers and tRNA synthesizes proteins.
The proteins synthesized by attached ribosomes can be transported outside the cell.
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During an annual check-up, the doctor typically feels the lymph nodes for swelling. What would swelling in the lymph nodes most likely indicate?
A.
the body is experiencing an infection
B.
white blood cells are lacking nutrients
C.
white blood cells are growing uncontrollably
D.
the body is not receiving enough oxygen
Answer: The body is experiencing an infection
A.
Explanation:
which of the following statements is false? group of answer choices a-b-o antigens are present in all human blood. dried bloodstains may tentatively be identified as blood by a color test. all bloods contain the enzyme hemoglobin. the kastle-meyer test is used to determine whether blood is of human origin.
The correct statement is the Kastle-Meyer test is used to determine whether blood is of human origin.
What is Kastle-Meyer test?The Kastle-Meyer test is a presumed blood test that was initially introduced in 1903 and uses the chemical indicator phenolphthalein to look for potential hemoglobin present.
What does a Kastle-Meyer test do?Since many years ago, the three-stage Kastle-Meyer (KM) test has been employed as a quick, presumptive test for blood. Using hydrogen peroxide to catalyze the oxidation of the indicator phenolphthalein, which turns it pink, the test determines the existence of hemoglobin's (heme) component.
Thus from above conclusion we can say that the correct statement is the Kastle-Meyer test is used to determine whether blood is of human origin.
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A fast food restaurant wants the average number of total carbohydrates in their items to be less than 50g. How can they use formulas to know if they have met this goal?
To count there goal they can multiply the carbohydrate grams by 4. Divide this result by the total number of calories to get the percent of carbohydrates in the food.
A calorie is a unit of ways a lot strength is in a given quantity of meals, additionally known as a kcal. Regardless of whether or not the carbohydrate in meals is sugar or starch, all carbohydrates offer the frame with four energy/gram, explains Dr.
The Dietary Guidelines for Americans endorse that carbohydrates make up 45% to 65% of general every day energy. So in case you get 2,000 energy a day, among 900 and 1,three hundred energy need to be from carbohydrates. That interprets to among 225 and 325 grams of carbs a day.
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A, Glucose turns into pyruvic acid. Energy and O 2 enter the cell. B, Oxygen and energy in the cell turn into H 2 O. C, Mitochondria in the cell and C O 2 exits the cell.
Label the main steps in the cellular respiration model.
A:
B:
C:
The steps in cellular respiration are ordered as follows:
A. Glucose turns into pyruvic acid.B. Energy and oxygen, O₂ enter the cell.C. In the Mitochondria, oxygen, O₂, and energy in the cell turn into water, and H₂O and CO₂ exit the cell.What is cellular respiration?Cellular respiration is the process by which large organic food molecules are broken down to produce energy in the form of ATP for the body.
Cellular respiration occurs in two ways:
Aerobic respiration - this occurs in the presence of oxygen and results in a large amount of ATP produced.Anaerobic respiration - occurs in the absence of oxygen and produces fewer ATP molecules.Learn more about cellular respiration at: https://brainly.com/question/425991
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Answer:a c a
Explanation:
In the noncyclic electron pathway of the light reactions, where are photosystems i and ii located?.
In photosystem II, electrons generated from water molecule breaking take their place. Algae and plants that use photosynthesis experience this.
What is the noncyclic photosynthesis pathway?Electrons travel from H2O through PSII to PSI and subsequently to NADP+ in the noncyclic pathway. When sunlight strikes the PS II pigment complex, high-energy electrons (e-) leave the chlorophyll molecule, which serves as the reaction's core.
What is the electrons' route during a light reaction?Robert Hill and Fay Bendall described the general characteristics of a generally accepted photoelectron transfer mechanism in 1960, in which two light reactions (light reactions I and II) take place during the transfer of electrons from water to carbon dioxide.
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PLEASEEEE HELP :)))
hypothesize why there are many different cell types in the human body. Why might it be important that our cells are specialized for a specific function?
Answer:
read these carefully and you'll develop your answer
Explanation:
1. Explain what is meant by a specialised cell.
Specialised cells are cells designed to carry out a particular role in the body.
2. Stem cells can specialise.
2. How do stem cells become specialised?
Stem cells can divide and produce cells that have the potential to become other more specialized cell types or tissues.
3. What might happen if a stem cell does not differentiate properly?
“Many cell types once they have become completely specialised (terminally differentiated) have a limited capacity to produce new cells of the same type.”, if they don't differentiate properly, they will not be able to specialize in any field, will it have a tissue to reside in nor function.
help
1. How might Margaret Mead have been biased by her culture and experience when she examined the culture of the Samoans?
2. Do you think any human universals appear in all cultures? Can you think of any universal taboos?
3. One of the main criticisms of Mead was that she did not use "science" in her approach to the study of Samoan people and culture. While she is also criticized for not spending enough time in Samoa to make a proper assessment, she used observation methods to come to her conclusions. Assess how effective you think observation is to the study of anthropology. In the case of Margaret Mead, do you think her observations were correct? Why or why not?
4. Why do you think Mead's own sexuality and identity were discussed in the article?
5. How can a researcher eliminate their own bias and subjectivity when they observe another culture? Won’t they always interpret what they see through the lens of their own experience and culture? Explain your thinking.
The article under reference is "Margaret Mead: Human Nature and the Power of Culture". See further explanation and the answers below.
How might Margaret Mead have been biased by her culture and experience when she examined the culture of the Samoans?It is possible that Margaret Mead was biased by her culture and experience when she examined the culture of the Samoans because:
In human nature, there are indeed universal taboos. Some of them which were corroborated by Sigmund Freud are:
Incest; and Cannibalism.It is right to test the strength of her arguments on the basis of the methods she used to carry out her research. Science ought to be practical and very factual. While Observation is one of the methods of gathering primary data, in this case, there is no way to know if the Samoans were being polite because she was a visitor and so didn't act like they would if she was not there.
Observation in science ought to be carried out in such a way that the population or sample being observed is not interfered with while the observer remains undetected.
Mead's identity and sexuality were brought into the article because it was important for the report about her own report to be objective. Although the article does not explicitly state this, the information given about Mead's sexuality gives the reader an idea of the possible elements that could have led to her being subjective if at all.
Except such research is subject to peer review, it cannot be determined with absolute certainty that some elements of subjectivity won't be involved.
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A person with prediabetes has a fasting blood glucose level of _____ milligrams per deciliter.
Answer:
100–125
Explanation:
A person with prediabetes has a fasting blood glucose level of _100–125____ milligrams per deciliter.
Using your knowledge about the relationship between cell cycle and cancer,
explain what was happening with the cells from Henrietta Lacks
This is for genetics
The relationship between cell cycle and cancer is based on that cancer cells undergo uncontrolled cell cycles due to mutations that affect this process, which occurs in HeLa cells.
What are HeLa cells?HeLa cells represent one of the ist worldwide known cell lines of cancer cells obtained from Henrietta Lacks, specifically cancer cells derived from cervical cancer.
Therefore, we can conclude that HeLa cells are cancer cells, which can divide indefinitely because they suffered mutations that affected certain aspects of the normal cell cycle, thereby generating tumorigenic cells that can be used as cell lines.
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Blood type is an example of ____________, in which two alleles may be expressed, but neither one may be dominant over the other.
Blood type is an example of codominance, in which two alleles may be expressed, but neither one may be dominant over the other.
In the field of genetics, codominance can be described as a phenomenon in which the different types of alleles for a particular gene are both expressed in an organism. There is no recessive allele in such a case as both alleles express themselves.
An example of codominance is the ABO blood group system. All the alleles A, B and O express themselves separately and none of them is recessive to the other. Both the alleles for these genes express themselves in an individual and determine the blood type of an individual.
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Which molecule, made by the light reactions in plants, could be used by cellular respiration in some bacteria?.
Oxygen and glucose are produced during photosynthesis and are used as the precursors for cellular respiration.
Carbon dioxide, water, and ATP are produced during cellular respiration, and these substances—along with sunlight—are the precursors for photosynthesis.
Energy is the capacity to carry out a task or generate heat. The energy of the system changes as a result of the rearrangement of atoms between different substances and the rupturing or formation of chemical bonds.
When energy is discharged from the system into the environment in the form of heat, the reaction is said to be exothermic.
Cells' mitochondria are where cellular respiration takes place. Carbohydrates (raw material) are mixed with oxygen taken in from the outside environment to release the chemical energy they contain. Additionally emitted are carbon dioxide and water vapor.
Therefore, cellular respiration is a chemical reaction that produces heat.
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an unknown microbe is grown on triple sugar iron. you observe the surface of the slant has changed to a dark red color. the butt of the slant is yellow. this result would be recorded as
Lactose is not fermented, but a little quantity of glucose is; this causes the oxygen-deficient butt to appear yellow (keep in mind that more media means more glucose), whereas the acid on the slant is oxidized by the organism into carbon dioxide and water, causing the slant to appear red (alkaline or neutral pH).
Triple sugar iron test: what is it?When you see the name of this test, Triple Sugar Iron Agar, you must keep in mind that it is a test that contains iron as well as three sugars (Lactose, Sucrose, and Glucose), and it also contains agar as a solidifying agent (TSI is a semi-solid media having slant and butt).
Lactose, Sucrose, and Glucose are present in Triple Sugar Iron Agar (TSI) in the proportions of 10:10:1 (i.e., 10 parts Lactose (1%), 10 parts Sucrose (1%) and 1 parts Glucose (0.1%)).
Triple Sugar Iron Agar Test Interpretation1) Lactose (or sucrose) fermentation results in the production of a significant amount of acid, which causes the phenol red indicator to turn yellow both in the butt and in the slant. Gases produced by some organisms cause bubbles and fissures to appear on the medium.
2) The oxygen-deficient butt will be yellow if lactose is not fermented but a tiny amount of glucose is (remember that butt has more glucose than slant, thus more media means more glucose), but on the slant the acid The organism will oxidize the (less acid as medium in slant is very little) to carbon dioxide and water, turning the slant red (alkaline or neutral pH).
3) The butt and the slant will both be crimson if neither lactose/sucrose nor glucose is fermented. The formation of ammonia from the oxidative deamination of amino acids might cause the slant to turn a deeper red-purple (more alkaline) (remember peoptone is a major constituent of TSI Agar).
4) The presence of ferrous sulfide, which is black, indicates the presence of H2S.
- Red/red: Nonfermentable glucose, lactose, and sucrose
- Red/yellow: Only fermentation of glucose
- Yellow/yellow: fermentor for glucose, lactose, and/or sucrose
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Question 4
Which describes this statement, "The frog is 4 cm long"?
A) inference
B) quantitative data
C) control group
D) qualitative data
Answer: Quantitative Data
Explanation:
The statement is describing a measurement taken of the frog.
A is wrong because we are certain the frog is 4 centimeters
B is correct
C is wrong because we are focusing on a single data point
D is wrong because 4 centimeters is a specific quantity not a "quality"
Which of the following is NOT a reason for cells to undergo mitosis?
1. Produce sex cells
2. Repair damage
3. Produce body cells
4. Growth of the body
Answer: 3. Produce body cells
Explanation:
Answer: 1. Produce sex cells
Explanation:
Options 2, 3, and 4 all undergo mitosis. While option 1 undergoes meiosis.
How do ions help keep your heart beating? Responses distributing electrical charges distributing electrical charges easily transporting messages easily transporting messages dissolving in your blood stream dissolving in your blood stream readily bonding with other atoms
According to the research, the correct option is distributing electrical charges. Ions help to keep the heart beating by distributing electrical charges.
How do ions keep the heart beating?Ions are a group of atoms that gains electrical charge and the direction of movement of these ions (in or out) influences the electrical activity in the human heart by sodium-potassium pump.
In this sense, the sequence of contractions of the heart is produced by depolarization distributing electrical charges, that is, the inversion of the electrical polarity of the membrane due to the passage of active ions.
Therefore, we can conclude that cardiac activity is mediated by the passage of ions that distribute electrical charges between the interior and exterior of heart cells.
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active and passive transport are important processes that help the cell(1 point) responses metabolize materials. metabolize materials. change size and shape. change size and shape. regulate the uptake and removal of materials. regulate the uptake and removal of materials. maintain the cellular membrane. maintain the cellular membrane.
Active and passive transport are important processes that help the cell regulate the uptake and removal of materials.
For a cell to carry out its function, the necessary materials need to move in and out of a cell. The cell also needs to take in energy and move out waste molecules.
Active and passive transport are the methods through which materials move in or out of a cell.
Such a process of movement that does not require energy is referred to as passive transport.
Such a process of movement that requires energy for the movement of molecules across the cell is referred to as active transport.
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List several factors that may interfere with an embryo's development
Answer:
Genetic, nutritional, environmental, uteroplacental, and fetal factors have been suggested to influence fetal growth. Uteroplacental and umbilical blood flow and transplacental glucose and fetal insulin are major determinants of fetal growth.
"Why is each part of the cell essential to survival?" please write and answer in CER form
Each part of the cell is essential to survival because they perform the necessary functions which help keep us alive.
What is a Cell?This is referred to as the simplest unit of life and becomes aggregated to for tissues which have similar structures and functions.
Let's take the eyes for example, if the cells are damaged then it will lead to the reduction in its function which in this scenario is a bad sight or having troubles seeing correctly. This in turn leads to not being able to work or move away from hazardous substances which is why each part of the cell is essential to survival.
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which statement correctly explains how fertilization produces a diploid cell?
speaker notes
Made up of mostly solid Iron
and Nickel
Composed of mostly granite
and basalt
Made up of mostly liquid iron
and nickel
Made up of mostly magma
The densest layer of the Earth
Contains convection currents
that move the tectonic plates
Thinnest layer of the Earth
Inner
Core
Mantle
Earth's
Crust
Outer
Core
Is your work saved?
Go Back to Lab Room
OUTPUT
STATION
Match the property cards with
Organize It! the correct layer of the Earth.
Place the layers of the Earth
cards in order from outside
(top) to inside
(bottom.)
outermost
layer
innermost
layer
|||
KESLER
SCIENCE
The Earth's thickest layer contains tectonic plate-moving convection currents. Earth's inner core mantle is its at thinnest layer. MAIN levels three A metallic core consisting of iron and nickel. b. Mantle: a rock that is only partially solid. Crust is a thin layer of stiff, brittle rock.
What is the solid nickel and iron spherical at the center of the Earth?
Inner and outer cores are the two layers that make up the core. The earth's inside core is a solid spherical made of iron and nickel that is incredibly heated. The sole liquid layer of the earth is its outer core, which is a sea of mostly iron and nickel.
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What do you think is the same characteristic/attitude of a person and your chosen pets?
Chosen pet: Dog and Cat
Answer:
gentle, caring, enthusiastic, loving
Given equal probabilities of the birth of a xy or xx, what is the probability that a group of four siblings includes all xy? all xx? all xy or all xx?.
The Probability that a group of four siblings includes all xy is 1/16; all xx is 1/16; all xy or all xx is 1/8.
The area of mathematics known as probability deals with numerical descriptions of how likely it is for an event to happen or for a claim to be true. A number between 0 and 1 is the probability of an event, where, broadly speaking, 0 denotes the event's impossibility and 1 denotes its certainty. The likelihood of an event occurring increases as its probability increases. Tossing a fair (unbiased) coin is a straightforward illustration. The probability of either "heads" or "tails" is half since there are no other conceivable outcomes and the coin is fair, meaning that both outcomes ("heads" and "tails") are equally likely.
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PLEASE I know this is simple but can you just give me the answer I need to bring my grade up in bio PLEASE I LOVE YOU
Explanation:
Its a mitochondria and it supplies energy to the cell
D. At a research lab, a scientist carelessly pours cultures of living microbes down the drain.
Classification:
Explanation:
At a research lab, a scientist carelessly pours cultures of living microbes down the drain.
Classification :Bacterial pollution
Explanation: The living microbes are dangerous bacteria that can cause dangerous bacterial pollution which can cause disease and infections.
What are microbes?Microbe, is an organism of microscopic size that can exist as a single cell or as a colony of cells which are also called microorganisms. They live in water, soil and air. Some microbes are pathogenic others are non pathogenic.
The microbes can be grouped into five main types:
viruses bacteria archaeafungi protists.Microscopic organisms, including bacteria, fungi and viruses, can cause disease in plant and animals.. But there are trillions of microbes living in and on your body right now. Most of the bacteria are useful . In fact, they help you digest food, protect against infection and even maintain your reproductive health.
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Help please! in a cell's membrane, the phospholipid heads point outward toward the environment and toward the interior of the cell. why is this arrangement of phospholipids important in regulating interactions with its surroundings?
the polar heads can interact with water and other charged particles.
the hydrophilic heads help keep the cell moist by attracting water.
the polar heads help the cell stick to other cells of similar type.
the positively charged heads repel all negatively charged particles.
Answer:
The polar heads can interact with water and other charged particles.
Explanation:
The explanation is in the answer. There is water inside and outside of the cell. Water is polar so the phospholipid heads cause electrostatic interactions.
The cell membrane or plasma membrane is made up of phospholipids and proteins in which the polar heads can interact with the water and other charged particles present towards the outward environment. Thus, the correct option is A.
What is cell membrane?The Cell membrane serve as the barriers and gatekeepers for the entry of substances into the cell. They are semi-permeable in nature which allows some molecules to diffuse across the lipid bilayer but restrict others. Small hydrophobic molecules and gases like oxygen and carbon dioxide can cross the cell membranes rapidly without any protein.
The cell membrane is made up of phospholipids and membrane proteins. The heads of these phospholipids point outward towards the environment and towards interior of the cell. This is because the polar heads are hydrophilic in nature which can interact with the water and other charged particles whereas the hydrophobic tails of these lipids cannot interact with polar charged particles.
Therefore, the correct option is A.
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what pair of molecules are commonly used by living cells to carry electrons and hydrogen atoms (thus serving as reserve chemical energy and electron transport molecules) during aerobic cellular respiration reactions?
NADH & FADH₂ pair of molecules are commonly used by living cells to carry electrons and hydrogen atoms.
Cell respiratory is the system with the aid of which biological fuels are oxidized in the presence of an inorganic electron acceptor such as oxygen to supply big quantities of energy, to power the majority production of ATP.
Cell respiration is a chain of chemical reactions that spoil down glucose to provide ATP, which may be used as power to strengthen many reactions at some stage in the frame. There are 3 principal steps of cell respiratory: glycolysis, the citric acid cycle, and oxidative phosphorylation.
Cellular respiratory is the procedure by which food, within the form of sugar (glucose), is transformed into energy inside cells. Mobile respiration is the method with the aid of which cells in plant life and animals damage down sugar and flip it into electricity, which is then used to carry out work on the cellular degree. The motive of cell respiration is simple: it presents cells with the energy they need to feature.
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Explain Phenomena in Terms of Concepts How does a magnetic field
change as you move away from a magnet? At what point does it end?
The strength of the magnetic field H and the strength of the magnetic
induction B can both be used to describe magnetic phenomena. The relationship provides the magnetization, or the magnetic moment per unit volume, or Mv. (9.80) in which 0 represents the permeability of a vacuum
How would you describe the lines of the magnetic field?Closed loops with no beginning or end are created by continuous magnetic field lines. From the north to the south pole, they travel.
Magnetic field lines are fictitious lines that are used to depict the magnetic field's direction at a particular spot.
South pole to north pole and north pole to south pole magnetic field lines are present both inside and outside the magnet, respectively.
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Pls help I’ll give you 25 pints
Answer:
1. Water
2. groundwater and ocean
3. evaporation and transpiration.
4. precipitation and runoff
5. precipitation
6. pollutants could be brought down to contaminate rivers, streams, lakes, and oceans.