OPTION B.
The column number of the periodic table tells you about the number of outer shells in the atom for nonmetal elements.
Explanation:The column number of the periodic table tells you about the number of outer shells in the atom for nonmetal elements. Each column, also known as a group or family, represents the number of valence electrons in the outermost shell. Valence electrons play a key role in determining the chemical properties and reactivity of an element. For example, the nonmetal elements in Group 17 (column 17) called the halogens, have 7 valence electrons and tend to gain one electron to achieve a full outer shell, making them highly reactive.
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Please help!
Which of the following would you need in order to compare the effect of two different fertilizers on plant growth?
a. a way to measure plant growth
b. a cardboard box to cover one plant
c. a variety of plant species
d. a selection of soil types
Answer:
a wayto measure plant growth
What is the function of the nucleus in the euglena cells you observed?
The nucleus in Euglena cells is responsible for housing the genetic material, which includes DNA that serves as instructions for cell function, as well as controlling metabolism and reproduction. It is enclosed by the nuclear envelope, which regulates the exchange of materials with the rest of the cell.
The nucleus of a Euglena cell, much like in other eukaryotic cells, serves a critical role in maintaining the life processes of the organism. Its primary function is to house most of the genetic material, which includes the cell's DNA. This DNA acts as a set of instructions for the cell, dictating how to synthesize the necessary molecules for cell function, including proteins and RNA. Additionally, the nucleus commands the metabolism and reproduction of the cell. The DNA within the nucleus tells the Euglena cell how to build the molecules it requires for survival and directs the overall activity within the organism. The nuclear envelope, a double membrane structure, encloses the nucleus and controls what substances enter and exit the nucleus through nuclear pores, ensuring proper cellular regulation. Understanding the nucleus's function provides insight into how eukaryotic cells manage their biological processes and maintain homeostasis.
Huntington's disease is a genetic disorder that is caused by a dominant allele. Which of the following is true?
A. A child who inherits one copy of the gene that causes Huntington's will have the disease.
B. A child who inherits one copy of the gene that causes Huntington's is a carrier for the disease.
C. Huntington's disease tends to skip generations.
D. A person with Huntington's disease will pass the disease on to 100 percent of their children.
Answer:
A child who inherits one copy of the gene that causes Huntington's will have the disease.
Explanation:
As per given information, Huntington's disease is a dominant genetic disorder. Hence, all the individuals having one or two copies of the causative gene would be affected, that is, the disease is expressed in both homozygous dominant and heterozygous dominant genotype.
So, if a child obtains one copy of the gene for the said disease, the child would be affected by the disease.
What discovery would weaken the primordial soup hypothesis of the origin of life?
Question 19 options:
Lightning was common on early Earth.
Earth’s early atmosphere contained carbon dioxide, water, and trace gases.
Earth’s early oceans were warm and shallow.
Asteroid impacts were uncommon when life is presumed to have begun.
Answer:
Asteroid impacts were uncommon when life presumed to have happened
Explanation:
The primordial soup hypothesis is based upon the impact that the asteroids had on Earth and the development of life on it. The hypothesis suggests that the asteroids were carrying the basic ingredients for life to develop, so they ''seeded'' the earth with life. Also, this hypothesis suggests that there were constant bombarding by asteroids, so they brought in lot of organic material with them. If it is proven wrong that there were lot of asteroids falling on Earth at the period when life is presumed to have begun, but instead that they were very few, this hypothesis will easily be dismissed. The reason why it will easily be dismissed is that it will lose the base around it is formed, and without it, it will have nothing as its basis.
Answer:
Option 4.
Explanation:
Primordial soup hypothesis explains that the early life has been originated in the ocean. The idea of primordial soup was first stated by Oparin and Haldane.
The early earth's atmosphere contains large amount of water, carbon dioxide, warm ocean and traces of various gases.Thunder, lightning ans asteroid impact is common in the early earth's atmosphere. . Thus, uncommon asteroid impact weakens the hypothesis of primordial soup.
Thus, the correct answer is option 4.
When doing blood testing for a viral infection, the procedure can be made more efficient and less expensive by combining partial samples of different blood specimens. If samples from three people are combined and the mixture tests negative, we know that all three individual samples are negative. Find the probability of a positive result for three samples combined into one mixture, assuming the probability of an individual blood sample testing positive for the virus is 0.03.
Answer:
The best way to approach this type of problem is to use the "complement method" ...
P(positive result) = 1 - P(negative result)
= 1 - (1 - 0.03)^3
= 1 - 0.97^3 = 0.087327 or 8.7%
Explanation:
Answer:
[tex]0.087[/tex]
Explanation:
Given -
Probability of positive blood sample for an individual is equal to 0.03
Number of sample is equal to three
Now , probability of getting a positive result for three sample combined into one single mixture is equal to
[tex]1 - (P)^ 3[/tex]
where P represents the probability of getting all individual negative test result
Substituting the given values in above equation, we get
[tex]P_{mixture} = 1 - (1-0.03)^3\\P_{mixture} = 1- (0.97)^3\\P_{mixture} = 0.087[/tex]
Where is the female part of a plant located?
A.in the pollen
B.in the roots
C.in the stem
D.inside the flower
Answer:
A.in the pollen
Explanation:
Pistil is the female reproductive part of a flower. However, it is located in the pollen.
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Reduction of oxygen to formwater occurs during A)photosynthesis only. B)respiration only. C) bothphotosynthesis and respiration. D)neither photosynthesis norrespiration. E) photorespirationonly
Answer:
Reduction of oxygen to formwater occurs during respiration only. B)
A man with prostate cancer has his prostate removed, and only his prostate removed. which of the below statements is true about the man after prostate removal?
Answer: Well, what are the available choices? I would believe he may experience some prostate pain for a few days.
Explanation:
After prostate removal, a man may experience side effects such as erectile dysfunction and urinary incontinence, but these can be managed. Follow-up care is essential.
Explanation:After the removal of the prostate, a man may experience several changes in his body. One common side effect is erectile dysfunction, as the prostate plays a role in sexual function. Additionally, urinary incontinence may occur as the muscles around the bladder and urethra may be weakened. However, these side effects can be managed through various treatments and therapies. It is important for the man to follow-up with his healthcare provider for post-surgery care and support.
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What role does helicase play in DNA replication? A.Helicase bonds together pieces of DNA as new strands form. B.Helicase connects the floating nucleotides to the template strands. C.Helicase breaks the hydrogen bonds and unwinds a section of DNA. D.Helicase checks the base pairs in each new strand of DNA.
The role of helicase in DNA replication is option C. Helicase breaks the hydrogen bonds and unwinds a section of DNA.
What role does helicase play in DNA replication?DNA helicase is an ATP-dependent catalytic enzyme that unwinds the dsDNA for providing leading as well as lagging strand replication. It runs ahead of the replication fork and continuously unwinds the dsDNA, providing the template for DNA polymerase to work.Unwinding the double-stranded nucleic acid (DNA/RNA) is a major function of any helicase subclass enzyme. In DNA replication, the helicase works by creating a complex with other proteins such as DNA primase, polymerase, or single-stranded-binding proteins. During replication, the helicase unwinds the dsDNA as we discussed above. Apart from this, several other functions are also performed by the helicase which is enlisted below,During DNA repair, the helicase unwinds or opens the dsDNA for repairing damaged DNA strands. During the translation, it breaks the hydrogen bonds between the DNA-RNA hybrid.The correct option exists C because Helicase stands for the enzyme that unwinds the DNA by breaking hydrogen bonds between the two strands and creating a replication fork.
Hence, option C. Helicase breaks the hydrogen bonds and unwinds a section of DNA.
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The presence of iron oxides in rocks, formed during a specific time period, can be used as evidence of oxygen in the atmosphere during that time period.
Question 18 options:
True
False
Answer:
True
Explanation:
Iron oxides can only form naturally in the presence of oxygen as shown the formulae below:
2Fe(II) + O2 → 2FeO
4Fe(III) + 3O2 → 2Fe2O3
The presence of naturally occurring iron oxides can, therefore, be a significant indicator of the presence of oxygen in the atmosphere.
which of the following is not a key component of the observation step of inquiry?
A.Making careful sketches
B.using clear, scientific language
C.taking careful measurements
D.Making up measurements to record
Answer:
Making up measurements to record
Choice D is correct
Explanation:
A key component of the observation step of inquiry is making up measurements to record
Answer:
The correct answer will be option-D.
Explanation:
The scientific method is used to answer the scientific questions which involve sequential steps. The first step of the method is making an observation which is performed using the sensory organs of the body. The observation compels human to become skeptical and ask questions.
The observation step of the method could be performed by observing and making the sketches, taking pictures, taking careful measurements and keeping it as evidence using a scientific method like holotype in taxonomy which is kept as evidence.
Recording the measurement becomes part of collecting data after the experiment which could be analysed. Therefore, option-D is the correct answer.
Which is an example of codominance?
PLZZZZZZ HELPP LAST QUESTION!!!!!
A.A dog with white fur and a dod with black fur mate and produce a dog with both white and black fur.
B. A purple flowerd tree and a white flower tree mate and produce a pink flowerd tree.
C. A sheep with white fur and a sheep with black fur mate and produce a sheep with gray fur.
D. A person with blue eyes and a person with brown eyes mate and have a child with brown eyes.
Answer:
Should be A.
Explanation:
Codominance is when they have both, not a mixture of the traits or a single dominate trait.
The example of codominance is a dog with white fur and a dog with black fur mate and produce a dog with both white and black fur. Thus, the correct option is A.
What is Codominance?Codominance is a type of inheritance in which two versions or alleles of the same gene are expressed separately in an individual to yield different traits in the organism.
In codominance, a heterozygous condition is observed in which both the alleles at a gene locus are fully expressed in the phenotype of the organism.
An example of codominance is a dog with white fur and a dog with black fur mate and produce a dog with both the white and black fur.
Therefore, the correct option is A.
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What does the splanchnic nerve innervate?
Answer:
viscera and blood vessels
Explanation:
The noun SPLANCHNIC NERVE has 1 sense: 1. any of several nerves of the sympathetic part of the autonomic nervous system that innervate viscera and blood vessels. Familiarity information: SPLANCHNIC NERVE used as a noun is very rare.
Which statement(s) are true about metamorphosis: multiple choice.
it is a highly complex genetic process
it is completely governed by preexisting genetic information received by the zygote
it is a form of accelerated evolution
what do we call the master control genes?
A.manipulating genes
B.hox genes
C.omega genes
Hox genes, also known as homeobox genes, are the master control genes responsible for turning on/off large numbers of genes during embryonic development, leading to organ formation and complexity in the animal kingdom.
The master control genes that play a pivotal role in the morphological development and differentiation of cells during embryogenesis are known as Hox genes or homeobox genes. These genes are noteworthy for their ability to activate or deactivate a vast array of other genes, thus guiding the formation of organs (organogenesis) and other tissues.
Hox genes have a homologous presence across the animal kingdom, displaying remarkably similar genetic sequences and chromosomal positions in diverse species such as worms, flies, mice, and humans. This similarity is attributed to the presence of these genes in a common ancestor. Additionally, Hox genes are receptive to evolutionary changes, specifically through duplication events that have enabled the emergence of more complex animal body plans and structural diversity. Option B
Which of the following effects does the recessive allele have in an organism which also displays a dominant allele?
A.the recessive allele will turn into a dominant allele
B.the gene will have a disorder
C.the dominant allele will become recessive
D.it has no effect
Answer:
Only individuals with an aa genotype will express a recessive trait; therefore, offspring must receive one recessive allele from each parent to exhibit a recessive trait. One example of a recessive inherited trait is a smooth chin, as opposed to a dominant cleft chin.
When one part of a car fails the rest of the car doesn’t run properly?
Answer: depends
Explanation:
Depending what part of the car doesn't run properly because if it's the transmission/engine then yes it will not work, if its q window or something minor then no the car will be perfectly fine :)
What part of your brain controls your emotions
emotions Are carried out by the limbic system, which is located in the temporal lobe.
Answer:
limbic system
The law of states that traits are passed from parents to offspring independently of one another.. True or false
Answer: I think It's true.
Explanation: Normally the daughter has most of the fathers traits and the son has most of the mothers traits even though both traits are separated equally, however, in this case the questions basically asking if the offspring gain the parents traits. so the answer should be true.
The carrier molecules of the electron transport system are located in the
Answer:
Inner mitochondrial membrane
Explanation:
Which correctly identifies the location of the asteroid belt?
Question 1 options:
A
B
C
D
Answer:
the correct choice is B
located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets.
Answer: Option (2)
Explanation: In the given image, the asteroid belt lies in the B position i.e. between the orbits of Mars and Jupiter.
Asteroid belts contains infinite number of asteroids, that ranges in size from a few meter to hundreds of kilometers. They normally moves at a speed of about 80,000 km/hr and continuous collision between them takes place. Some of them even have satellites and most of them that are found to exist on earth are derived actually from that asteroid belt.
The, the correct answer is option (2).
The oxygen consumed during cellular respiration is involved directly in which process or event?
The oxygen consumed during cellular respiration is directly involved in the electron transport chain. During this final stage of cellular respiration, oxygen acts as the final electron acceptor and combines with electrons and hydrogen ions to form water, releasing energy that is used to produce ATP.
Explanation:The oxygen consumed during cellular respiration is directly involved in the process known as the electron transport chain, which is the final stage of cellular respiration that occurs in the mitochondria. In this process, oxygen accepts electrons that have been passed through a series of proteins in the mitochondrial membrane. This series of reactions occurs inside the mitochondria and is known as oxidative phosphorylation. Oxygen acts as the final electron acceptor and combines with the electrons and hydrogen ions to form water, releasing energy in the process. This energy is then used to produce ATP, the molecule that provides energy for cellular functions.
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which of the following is the most likely result of converting forestland to urban development?
A.the amount of land available for lumber production decreases.
B.fewer trees are needed because cities are made mainly of concrete.
C.people discover more efficient ways to grow trees.
D. the price of lumber goes down.
A double-stranded DNA molecule is being transcribed, only part of which is shown below. If the molecule is translated from left to right, one of the nucleotides shown in bold would be the first transcribed in this small molecule. Which of the following is the correct mRNA produced from the transcription of this DNA molecule? 5'-AUGAUCGGAUCGAUCCAU-3' 3'-UACUAGCCUAGCUAGGUA-5' 5'-UACUAGCCUAGCUAGGUA-3' 3'-AUGAUCGGAUCGAUCCAU-5'
In transcription, DNA is transcribed into mRNA using a template strand of DNA. Here, the template strand is 3'-UACUAGCCUAGCUAGGUA-5' and the resulting mRNA sequence is 5'-AUGAUCGGAUCGAUCCAU-3'. This process is consistent with the complementary base pairing system observed in transcription, where Uracil (U) is used in mRNA instead of Thymine (T) in DNA.
Explanation:The process in question here is the transcription of DNA to mRNA; a core aspect of molecular biology. Looking at the provided double-stranded DNA molecule, and if we are considering the molecule to be translated from left to right, the DNA strand used as a template for transcription would be: 3'-UACUAGCCUAGCUAGGUA-5'. In this case, the A base pairs with U, U with A, G with C, and C with G, resulting in an mRNA sequence that mirrors the DNA sequence: 5'-AUGAUCGGAUCGAUCCAU-3'. This is due to the fact that, within transcription, DNA and RNA operate on a complementary base pairing system, with a notable difference: thymine (T) in DNA is replaced by Uracil (U) in mRNA.
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Fungi can't produce their own energy but instead take in nutrients from their environment. This makes fungi
A. heterotrophs.
B. chemotrophs.
C. mixotrophs.
D. autotrophs
What would most likely cause the cycle to continue? An explanation inspires new questions and the process of making new observations. A fact inspires new questions and the process of making new observations. A careful systematic process is used in experiments to gather observations and data. A fact is established and more data is needed to convince scientists that it is true.
Answer:
An explanation inspires new questions and the process of making new observations.
Explanation:
Answer:
The correct answer is option an explanation inspires new questions and the process of making new observations
Explanation:
New things are being discovered and invented in a scientific field due to the "skeptical nature of humans" that is asking the questions.
The basis of scientific revolution is that a new question can be derived from the explanation of the earlier answered scientific hypothesis as the explanations consists of the data obtained after the assumptions, observations and related experiments. This generates new ideas of 'if and but conditions" in the mind which leads to the formation of a new hypothesis thus continuing the cycle of a a scientific research.
Thus, option an explanation inspires new questions and the process of making new observations is the correct option.
What happens when an oceanic and a continental plate collide? the continental plate sinks below the oceanic plate the oceanic plate sinks below the continental plate mid-oceanic ridges are formed the two plates break from the force
Answer:
The oceanic plate sinks below the continental plate
Explanation:
When there's a collision between an oceanic and continental tectonic plates, we have a convergent plate boundary. The continental plate is less dense, it is higher, and it is thicker, while the oceanic is denser, lower positioned, and less thick. This results in the oceanic plate to sink below the continental plate, in a process known as subduction. As the oceanic plate moves below the continental plate the area around the boundary is lifting up, resulting in the formation of mountain chains. There's also a great deal of volcanic activity along the boundary, often resulting in the formation of volcanic island chains, and the earthquakes are also very common as there's lot of adjustment going on in the crust.
Answer:
The oceanic plate sinks below the continental plate
Explanation:
What's the science behind fingerprint scanners?
Bio-metrics are automated methods of recognizing a person based on a physiological or behavioral characteristic. Among the features measured are face, fingerprints, hand geometry, handwriting, iris, retinal, vein, and voice.
The scanner uses a light-sensitive microchip, either a CCD, charge-coupled device, or a CMOS image sensor, to produce a digital image. The computer analyzes the image automatically, selecting just the fingerprint, and then uses sophisticated pattern-matching software to turn it into a code.
The technique relies on capturing an optical image, essentially a photograph, and using algorithms to detect unique patterns on the surface, such as ridges or unique marks, by analyzing the lightest and darkest areas of the image.
Fingerprint scanners use biometric technology to identify individuals based on unique fingerprint patterns. There are three main types: optical, capacitive, and ultrasonic scanners, which capture fingerprints in different ways. The data is stored as a mathematical representation, ensuring security against unauthorized access.
Fingerprint scanners, such as those found on cell phones and laptops, utilize biometrics to identify individuals based on unique characteristics of their fingerprints. Fingerprint scanners come in three main types: optical, capacitive, and ultrasonic, each working through a different mechanism to capture and process fingerprint data for authentication purposes.
An Optical Scanner captures an image of the finger and converts it into an identification code, which is then matched against a biometric database for verification.The Capacitive Scanner detects the electrical signals from the finger, forming an impedance profile that serves as a unique identifier for the individual.Ultrasonic Scanners employ ultrasonic waves that reflect off the finger to create a detailed map of the fingerprint's ridges and valleys.The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.
Answer:
External
Explanation:
External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water.
Fats obtained from a variety of foods are essential nutrients but may be harmful to the body in some forms. Are healthy fats that have at least one double bond in the fatty acid chain. Most are artificially hydrogenated fats that have detrimental effects on health.
Answer:
Saturated fats
Explanation:
Because if you eat too much it could make you sick.
Fats obtained from a variety of foods are essential nutrients but may be harmful to the body in some forms b) unsaturated fat are healthy fats that have at least one double bond in the fatty acid chain. Most c) trans fat are artificially hydrogenated fats that have detrimental effects on health.
Unsaturated fats are healthy fats that have at least one double bond in the fatty acid chain. These fats are generally found in foods like fish, nuts, and vegetable oils and are considered beneficial for heart health.
The majority of trans fats are synthetically hydrogenated fats with harmful health consequences. They have been connected to an elevated risk of heart disease and are commonly present in processed meals.Trans fats have the ability to increase LDL ("bad") cholesterol and decrease HDL ("good") cholesterol levels.Another kind of fat that is solid at room temperature and is typically derived from animal sources is saturated fat. Heart disease is also linked to a high consumption of saturated fats.complete question:
Fats obtained from a variety of foods are essential nutrients but may be harmful to the body in some forms. _____ are healthy fats that have at least one double bond in the fatty acid chain. Most ______ are artificially hydrogenated fats that have detrimental effects on health.
-saturated fat
-unsaturated fat
-trans fat