Answer:
The answer would be D: 17 MPH, downstream.
Answer:
The actual velocity of the canoe is 17 mi/hr in downward direction.
Explanation:
It is given that,
Velocity of canoe, [tex]v_c=5\ mi/hr[/tex] (downstream)
Velocity of stream, [tex]v_s=12\ mi/hr[/tex]
We need to find the actual velocity of the canoe. Let it is equal to v. As it is clear that both velocities are in same direction. So, the actual velocity of the canoe is given by the sum of velocity of canoe and the stream.
[tex]v=v_c+v_s[/tex]
[tex]v=5+12[/tex]
v = 17 mi/hr
Since, the velocity is positive. It means it is in downstream direction. So, the correct option is (d) "17 mi/hr, downstream".
Which of the following correctly explains the role of enzymes in biochemical reactions?
A. Enzymes provide energy in the form of ATP to lower the activation energy needed for the reaction.
B. Enzymes bond with one or more reactants and lower the activation energy needed for the reaction.
C. Enzymes bond with one or more reactants to increase the amount of energy needed for the reaction.
D. Enzymes provide energy in the form of high energy chemical bonds to increase the overall energy of a reaction.
Will give BRAINLIEST if correct :)
The answer should be option B "Enzymes bond with one or more reactants and lower the activation energy needed for the reaction." Enzymes role is to reduce the amount of activation energy it needs in order for it to have the reaction. Enzymes are known to be the ones to speed up a biochemical reaction.
Hope this helps.
The role of enzymes in a biochemical reaction is to bind with one or more reactants and lower the activation energy which is needed for the reaction. Thus, the correct option is B.
What is the role of an enzyme?
Enzymes are the biocatalysts which participate in biochemical reactions. Enzymes are mostly proteinaceous in nature that is they are made up of proteins and sometimes metals and other molecules are also found in their structure.
Enzymes are added to a reaction, it reacts with the substrate and it increases the rate of a reaction, that is it increases the formation of products. This is possible because enzymes lowers the activation energy of a reaction which is needed to transformation of reactants into products.
Therefore, the correct option is B.
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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.A zebra mussel is discovered in a lake in Pennsylvania for the first time. Why would this make an ecologist worried?
If a zebra mussel is discovered in a lake in Pennsylvania, then the ecologist would be worried because it is an invasive species. The zebra mussel is native to Ukraine and Russia, but if it has been found in Pennsylvania, than it means that it has been introduced in this area. As an invasive species, the zebra mussel can be very dangerous for the native species in the lake. The invasive species usually are more competitive for food sources than the native species, manage to reproduce quicker, bring in diseases, and the native species tend to not have defense mechanisms for them. This leads to rapid decline or even extinction in the native species, while the invasive spreads out quickly and takes over, resulting in dramatic change in the whole ecosystem.
Cytokinesis occurs after _____, but events leading up to it actually begin during _____.
A. anaphase; telophase
B. telophase; anaphase
C. telophase; prophase
D. anaphase; prophase
Answer: C
Explanation:
Answer:
B. telophase; anaphase
Explanation:
Cytokinesis is a process through which the cytoplasm of the mother cell gets divided and distributed equally in the daughter cells. In animal cells, this process begins in anaphase and continues till the end of telophase.
Mitosis basically comprises 4 stages :
(1) Prophase
(2) Metaphase
(3) Anaphase
(4) Telophase
Till prophase and metaphase most of the events that occur are concerned with initial changes in the nucleus like condensation of chromatin and lining up of chromosomes in the equatorial plate. But, as the mitosis proceeds further the events related to separation of chromatids and their movement towards opposite poles also gets completed till anaphase. So, the only major event left after that is cytokinesis which begins in the anaphase itself and gets completed by the end of telophase.
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.
A substance is either an element or a compound that can not be physically separated. TRUE OR FALSE
The basic types of tissue in the human body are
Answer:
The basic types of tissue in the human body are...
1. Muscle
2. Epithelial
3. Connective
4. Nervous
Explanation:
There are only 4 types of basic tissue in the human body. However there are many more tissues in your body.
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Final answer:
The four basic types of tissues in the human body are epithelial tissue, connective tissue, muscle tissue, and nervous tissue, each playing a distinct role in body function and organization.
Explanation:
The Four Basic Types of Tissues in the Human Body:
The human body is a complex system composed of numerous cells, which are organized into four fundamental categories of tissue. These tissue types are essential for the proper function and structure of all bodily organs and systems. The four basic tissue types within the human body are:
Epithelial tissue: Comprises cells that line both the inner and outer surfaces of the body, such as skin and the lining of the digestive tract. This tissue type plays a crucial role in protection, secretion, and absorption.Connective tissue: Made up of cells that form the structural framework of the body, providing support and protection. Examples include bone and cartilage.Muscle tissue: Enables the body to move through contraction and relaxation. It is essential for functions ranging from locomotion to the movement of internal organs.Nervous tissue: Responsible for propagating information throughout the body, allowing for communication between different parts of the body and the brain.These tissues combine to form all the organs, structures, and other contents of the body. Any disruption in the tissue structure can indicate injury or disease, which can be studied through histology to understand their appearance, organization, and function in greater detail.
Sphagnum is a type of ____ that has nonliving cells that can absorb moisture and be used in gardening.
Hello There!
Sphagnum is a type of "MOSS" that has nonliving cells that can absorb moisture and be used in gardening.
Mosses are small flowerless plants that typically grow in dense green clumps or mats.
Answer:
a plant of a genus that comprises the peat mosses.(basically moss)
Explanation:
the exact definition
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.
Which plant-cell organelle supports and maintains the cell's shape and protects the cell from damage?
cell membrane
Ocell wall
chloroplast
vacuole
Answer:
The correct answer option is: Cell wall.
Explanation:
Cell wall is that plant cell organelle which supports and maintains the cell's shape and protects the cell from the damage.
It is a thick and fibrous structure, made of cellulose, which encloses the cell in it, acting as a boundary between the components of the cell and the external environment.
The cell wall is present in plants, algae, fungi and prokaryotes.
Answer:
Plant-cell organelles do not have cell membranes. Perhaps the second answer was just a mistaken spelling of cell wall. The cell wall helps cells maintain shape and protects them from damage.
Explanation:
Plant-cell organelles have a cell wall for this purpose. Animals have cell membranes that provides the same protection for their cells.
What is a gene ?
A) a section of a protein that codes for DNA.
B) the alternate version of a trait.
C) the visible trait in the F1 generation.
D) a section of DNA that codes for a specific trait .
Answer:
D) a section of DNA that codes for a specific trait .
Explanation:
Which type of tissue is not readily repaired if damaged? Epithelial or tissue whose cells remain mititic throughout life or tissues whose mature cells are amititic or liver?
Tissues whose mature cells are amitotic, like nervous tissues and cardiac muscle tissue, do not readily repair when damaged. However, epithelial tissues can quickly replace damaged cells as they remain mitotic throughout life.
Explanation:The type of tissue that does not readily repair if damaged is generally tissues whose mature cells are amitotic, meaning they do not divide. This includes nervous tissues in the brain and spinal cord, and cardiac muscle tissue in the heart. Amitotic tissues don't replicate via mitosis after the organism's development; hence, damage to these tissues can lead to permanent issues because they lack the regular cell renewal seen in mitotic tissues, such as epithelial tissues.
Epithelial tissues, for example, can rapidly replace damaged and dead cells because they remain mitotic throughout life. These tissues form large sheets of cells that cover all the exterior surfaces of the body, line internal cavities, and form certain glands. They are nearly completely avascular, with no blood vessels crossing the basement membrane to enter the tissue; therefore, nutrients come via diffusion or absorption from underlying tissues.
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What property of DNA makes it possible for a probe to find a single-stranded
DNA target gene?
A. Alleles are in pairs.
B. A DNA molecule has two paired strands.
C. Chromosomes come in pairs.
D. Probes are dominant over genes.
Answer: it is B " A DNA molecule has two paired strands"
Explanation:
Answer:
B. A DNA molecule has two paired strands.
Explanation:
DNA is a double helical structure in which two DNA strands are joined together by complementary base pairing between the bases of two strands.
The tendency of a single-stranded DNA to base pair with another single-stranded DNA or RNA with a complementary sequence allows a probe to locate a gene in a single-stranded DNA.
Probes are the short polynucleotide strands with a complementary sequence to that of the gene under study. Therefore, probes bind to the genes with complementary sequences and help locate them in a long single-stranded DNA.
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.
What determines an organism's phenotype?
A.age
B.genotype
C.random mutations
Answer:
B. genotype
Explanation:
Genotype determines an organism's phenotype.
Genotype determines an organism's phenotype.
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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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Match the following terms to their correct definition. 1) Transcription A) Is the process that produces two identical replicas of DNA from one original DNA molecule. 2) Translation B) Is the total genetic information possessed by an organism and at least one copy is carried in each of its cells 3) Replication C) Is the process in which messenger RNA (mRNA) is decoded by a ribosome to produce a specific amino acid chain, or polypeptide 4) Genome D) Is the process in which a particular DNA sequence is copied by RNA polymerase to produce a complementary RNA molecule
Answer:
1) Transcription--D) Is the process in which a particular DNA sequence is copied by RNA polymerase to produce a complementary RNA molecule
2) Translation--C) Is the process in which messenger RNA (mRNA) is decoded by a ribosome to produce a specific amino acid chain, or polypeptide
3) Replication--A) Is the process that produces two identical replicas of DNA from one original DNA molecule.
4) Genome--B) Is the total genetic information possessed by an organism and at least one copy is carried in each of its cells
Transcription is the process of copying a DNA sequence into a complementary RNA molecule, while translation is the decoding of mRNA to produce a specific amino acid chain. Replication is the process of producing two identical DNA molecules from one original, and the genome is the total genetic info carried by an organism.
Explanation:Matching the provided terms with their correct definitions would be as follows:
Transcription D) Is the process in which a particular DNA sequence is copied by RNA polymerase to produce a complementary RNA molecule. Translation C) Is the process in which messenger RNA (mRNA) is decoded by a ribosome to produce a specific amino acid chain, or polypeptide. Replication A) Is the process that produces two identical replicas of DNA from one original DNA molecule. Genome B) Is the total genetic information possessed by an organism and at least one copy is carried in each of its cells.
These terms are fundamental in understanding basics of genetics and molecular biology.
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Which activity occurs during the process of photosynthesis?
Answer:
light energy is converted into the chemical energy of organic molecules
Explanation:
Final answer:
Photosynthesis is a two-stage process involving the light-dependent reactions, where sunlight energy is converted into ATP and NADPH, and the Calvin cycle, which uses these molecules to synthesize glucose from carbon dioxide.
Explanation:
The Process of Photosynthesis
Photosynthesis occurs in the chloroplasts of plant cells and can be divided into two main stages: the light-dependent reactions and the Calvin cycle. During the light-dependent reactions, energy from sunlight is harnessed by chlorophyll within the thylakoid membranes, and converted into chemical energy in the form of ATP and NADPH. Water is also utilized in this stage, resulting in the release of oxygen as a byproduct. The ATP and NADPH produced are then used to power the second stage, the Calvin cycle, which takes place in the stroma of the chloroplast. In the Calvin cycle, ATP and NADPH from the light-dependent reactions are used to convert carbon dioxide from the air into glucose, which serves as an energy source for the plant.
Fossils of a species of bird are found in layer 3. Which layer is most likely to
have organisms that lived at the same time as the bird speelea?
O A Layer
O B. Layer
OC. Layer 10
O D. Layers
SUBMITTED
Answer:
b
Explanation:
it is my common the lower you get
When you get a mosquito bite or bump your head, What causes the accumulation of fluids in tissues and how does this fluid become lymph?
Answer:
by scratching the bite or bump it causes heat and makes it swell with fluid and sometimes will bleed
which type of DNA technology is used to caused bacteria to produce human insulin?
a. recombinant DNA
b. PCR
c. nuclear transfer
d. gel electrophoresis
Answer:
recombinant DNA
Choice A is correct
Explanation:
The type of DNA technology that is used to cause bacteria to produce human insulin is recombinant DNA.
Recombinant DNA is a technology developed by scientists which made it possible to inject a human gene into the DNA or the genetic material of a common bacterium
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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A driver traveling at a speed of 21 m/s tops a hill and spots a deer standing in the middle of the road 90 meters away. He hits the brakes and panic stops the car in 8 seconds. How far did the car travel before stopping?
Answer:
84m
Explanation:
Using the kinematics equation we can come up with the answer:
[tex]d=\dfrac{Vf+Vi}{2}\times t[/tex]
Where:
Vf = final velocity
Vi = initial velocity
t = time
In your problem we have the following given:
Vf= 0 m/s
Vi = 21 m/s
t = 8 seconds
The Vf is zero because the car stopped. The distance given in this case is not useful in determining the car's distance so we will solve it. So just fill in the equation with the given:
[tex]d=\dfrac{Vf+Vi}{2}\times t\\\\d=\dfrac{0m/s+21m/s}{2}\times 8s\\\\d=10.5m/s\times 8s=84m[/tex]
Thankfully, the deer was not hit!
Which of the following macromolecules are correctly matched with one of their functions?
Nucleic acids—insulate; carbohydrates—catalyze chemical reactions
Nucleic acids—catalyze chemical reactions; carbohydrates—insulate
Fats—insulate; proteins—catalyze chemical reactions
Fats—catalyze chemical reactions; proteins—insulate
Answer:
The correct option is this: FATS INSULATE; PROTEINS CATALYZE CHEMICAL REACTIONS
Explanation:
The macro molecules that are peculiar to living organisms are carbohydrate, proteins and fat and oil. Each of these macro molecules has its specific functions, which it carries out. For instance, fat is responsible for insulating the body and keeping the body warm. This helps the body to maintain its optimum temperature of 37 degree Celsius.
Proteins are another type of macro molecules. Proteins perform diverse functions in the living organisms, one of these is catalysis of biochemical reaction. Proteins act as catalysts for biochemical reaction by speeding up the rate at which biochemical reaction occur.
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.
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)
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.
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 of the following statements about the relationship between photosynthesis and cellular respiration is true? A) In cellular respiration, the blochemical pathways result in the same produ photosynthesis. B) Cellular respiration occurs only in animals and photosynthesis plants. C) There is a net consumption of ATP in cellular respiration occurs only in of ATP in photosynthesis. and a net production D) Cellular respiration is catabolic and photosynthesis is anabolic.
Answer:
d
Explanation:
cellular respiration is catabolic as it breaks down the small molecules from digestion into smaller molecules as ATP is created. Photosynthesis is an example of an anabolic reaction as it creates energy using small molecules (chlorophyll and sunlight). Anabolic- small molecules into large molecules. Catabolic- larger molecules convert to small molecule.
Photosynthesis utilizes energy to build carbohydrates while cellular respiration metabolizes carbohydrates.
Explanation:The correct statement about the relationship between photosynthesis and cellular respiration is that photosynthesis utilizes energy to build carbohydrates while cellular respiration metabolizes carbohydrates. Photosynthesis is the process by which plants convert sunlight into energy and produce carbohydrates, while cellular respiration is the process by which organisms break down carbohydrates to produce ATP. Both processes are interconnected and play vital roles in the carbon cycle and energy flow in ecosystems.
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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.