Answer : Velocity is speed with displacement
Explanation :
The speed of an object is defined as the total distance covered divided by total time taken.
The velocity of an object is defined as the total displacement divided by total time taken.
The speed is a scalar quantity because it has only magnitude while the velocity is a vector quantity i.e. having both magnitude and direction.
The relationship between speed and velocity is " velocity is speed with displacement ".
Hence, the correct option is (b).
A student wonders whether removing the nucleus from a cell would result in a new prokaryotic cell. Why would this procedure fail to produce a prokaryotic cell?
Answer:
Removing the nucleus from the cell would not make it prokaryote because there are more characteristics that makes a cell prokaryote.
A eukaryotic cell has nucleus as well as membrane bound organelles found in the cytoplasm.
Even if the student will remove nucleus from the cell, the membrane bound cell organelles will remain in the cell.
Hence, only removing the nucleus from the cell would not make it a new prokaryotic cell.
What are the three primary elements of a healthful eating plan?
Which organism has more than 200 chromosomes?
a. dogs
c. peas
b. goats
d. crayfish?
Answer:
The answer is A
Explanation:
The answer is a hope this helps
Bass pro shops recognizes that outdoors enthusiasts are a diverse group. likely segments include hunters, campers, and boaters. what is this segmentation method called?
what is carbon needed for in living things?
Where your extra fat is deposited is determined primarily by your genetic makeup?
What will happen to a red blood cell (rbc), which has an internal ion content of about 0.9%, if it is placed into a beaker of pure water?
Final answer:
A red blood cell placed in pure water, which is a hypotonic solution, will undergo hemolysis due to water rushing in via osmosis, causing the cell to swell and potentially burst.
Explanation:
If a red blood cell (RBC), with an internal ion content of about 0.9%, is placed into a beaker of pure water, the environment around the cell is considered hypotonic. Due to the higher concentration of solutes inside the RBC compared to the pure water, water will rush into the cell, a process driven by osmosis. With a fixed surface area, the RBC membrane can only stretch so much before the RBC will swell and undergo hemolysis, which is when the cells swell up with water and eventually burst.
Most cells have mechanisms in place to prevent excessive water intake, but red blood cells lack these regulatory systems, making them ideal for osmolarity studies. In a hypertonic solution, water would leave the RBC, causing it to shrink or crenate. However, in an isotonic solution, the RBC would retain its normal shape, with equal water movement into and out of the cell. This dynamic is essential for maintaining cellular function and integrity in different environments.
Jason adds the antibiotic penicillin to a bacterial culture. The bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. What caused this genetic modification?
mutations to the DNA sequence
normal gene regulation
operon gene induction
RNA interference
Answer:
The correct answer is- mutation to the DNA sequence
Explanation:
A change in the DNA sequence by base-pair addition, deletion or substitution or by any other way bring mutation in the DNA. In bacteria, random mutation occurs in their DNA sequence which can change the codon sequence and results in coding for some enzymes or protein that deplete the effect of antibiotics on them which provide antibiotic resistance to the them.
So by doing mutation in their DNA sequence bacteria can gain antibiotic resistance or the bacteria which already have the appropriate mutation in their DNA will be selected by natural selection and other bacteria will die due to antibiotic effect.
Therefore genetic modification is caused by mutation in the genetic sequence.
Which term describes the study of the functions of the structures of the body??
"a young woman, who has recently suffered acute stress, asks the nurse why she seems to be more sensitive to stress than her husband. the nurse explains that a contributor to this phenomenon is:"
During prenatal development, the organism depends on the ________ to exchange food and waste products with the mother's blood stream.
If you are performing this test on an unknown organism why is it a good idea to run simultaneous
Answer:
If you are performing this test on an unknown organism, why is it a good idea to run simultaneous tests on known phenylalanine-positive and phenylalanine-negative organisms? Inoculation of a positive control (an a successful result from it) adds confidence to negative results on an unknown organism.
Explanation:
The nurse is providing care to a child with kawasaki disease. what does the nurse include in the child's plan of care? select all that apply.
Instituting cardiac monitoring
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How are "gamete," "chromosomes," and "zygote" related?
.
What drives the process of plate tectonics?
unequal heat distribution
ocean currents
earthquakes
gravity
Answer:
unequal heat distribution is a correct option.
Explanation:
Thermal convection drives the process of plate tectonics.The heat from the Earth inner surface results in the unequal heat distribution and formation of hot magma, which causes the flow of cooler magma and movement of the plates.Thus the heat which is transferred from the mantle result in plates tectonicsThe main driving force behind the process of plate tectonics is the unequal heat distribution within the Earth's interior. This heat comes from various sources, including the residual heat from the planet's formation and the ongoing radioactive decay of elements in the Earth's core.
The correct option is A.
The heat generates convection currents in the underlying semi-fluid layer of the Earth's mantle called the asthenosphere. These convection currents cause the movement of tectonic plates, which are large, rigid pieces of the Earth's lithosphere that float on the semi-fluid asthenosphere.
As the hotter, less dense material rises and the cooler, denser material sinks within the mantle, it creates a cyclical pattern of upward movement and downward motion. This convective flow exerts forces on the tectonic plates, leading to their gradual motion.
While ocean currents and earthquakes are related to plate tectonics, they are not the primary driving forces. Ocean currents are driven by various factors, including wind patterns, temperature differences, and the rotation of the Earth.
Hence , A is the correct option
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The larva of a frog is a tadpole.
True or False.
How do the products of meiosis compared to the original cell?
Answer:
Meiosis is the type of cell division in which a parent cell divides into four daughter cells. Meiosis generally occurs in the gamete or sex cells. The haploid cells are produced by the meiosis.
The original cell is diploid that contains the chromosome number (2X). The original is divided into the four daughter cell. The daughter cells produced by the meiosis contains the half chromosome number as compared with original cell (X). The crossing over occurs in meiosis and the daughter cells are quite different from the original cells.
What kind of fossil would a gastropod shell must likely be?
Carbon films
Gastroliths
Coprolites
Molds
Answer:
Carbon films
Explanation:
The Gastropod class is the largest class of mollusks, including living and fossil species. The class has fossil records since the beginning of the Cambrian period, and are considered the most successful class of mollusks in terms of evolution in the environment, as they have conquered the marine, freshwater, and pulmonary snails and several other groups, the medium. terrestrial, and they succeeded in converting the cavity of the robe into a lung.
Which of the organic compounds stores and transmits genetic information?
Nucleic acids, namely DNA and RNA, are the organic compounds that store and transmit genetic information. DNA serves as the hereditary material in cells, while RNA assists in protein synthesis.
Explanation:The organic compounds that store and transmit genetic information are nucleic acids. These comprise of Deoxyribonucleic acid (DNA) and Ribonucleic acid (RNA).
DNA contains the instructions for the synthesis of proteins by dictating the sequences of amino acids in polypeptides through processes known as transcription and translation. DNA carries the genetic blueprint of the cell that is passed from parent to offspring via cell division. It has a double-helical structure with the two strands running in opposite directions (antiparallel), connected by hydrogen bonds and complement each other.
In RNA, uracil replaces thymine to pair with adenine (U-A). RNA is single-stranded and takes many forms, such as messenger RNA (mRNA), ribosomal RNA (rRNA), and transfer RNA (tRNA), all of which participate in the synthesis of proteins.
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Which piece of lab equipment is used to measure the mass of a chemical sample? A) balance B) thermometer C) spring scale Eliminate D) graduated cylinder
Answer:
the awnser is A balance
Explanation:
Balance is used to measure the mass of a chemical sample. So, the correct option is (A).
What is Lab Equipment?Laboratory equipment is a variety of tools and equipment used by scientists working in a laboratory. This allows students to do experiments instead of just reading about them. They can observe and complete exciting experiments instead of taking monotonous notes. This makes it easy to grasp challenging principles and concepts.
Types of Lab equipment's present in the lab.
Safety GogglesLatex GlovesLab CoatsBiohazard Waste ContainersFirst-Aid KitsFire ExtinguishersGraduated CylindersVolumetric FlasksSeveral equipment have specific work in the lab like Balance is used to measure the chemical sample's mass. Thermometer is used to measure the temperature.
Thus, Balance is used to measure the mass of a chemical sample. So, the correct option is (A).
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As plants grow, stems and branches thicken or increase in girth. This thickening is a result of cells in the vascular cambium. Vascular cambium can develop into either xylem or phloem tissue within a plant. Because of this unique ability, we would expect vascular cambium cells to have all but one of these characteristics.
C.
Explanation:
did this as of may,16th 2019. Ugh biology usatestprep a pain.
Which transport mechanisms require the formation of a vesicles to transport material into or out of the cell?
The transport mechanisms require the formation of a vesicles to transport material into or out of the cell is exocytosis and endocytosis.
What is Transport mechanism?Transport mechanism refers to a system in which nutrients or waste products are transported in and out of the cell or from one location to another.
The two form of transport mechanism are endocytosis and exocytosis.
Excytosis is a process that help to transport waste products out of the cell.
Endocytosis is the process where molecules are transported into the cells.
Therefore, The transport mechanisms require the formation of a vesicles to transport material into or out of the cell is exocytosis and endocytosis.
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Saucer-shaped, flattened free nerve endings that make contact with cells in the stratum basale are called
Gila Monsters are one of two types of venomous lizards in the world. If you wanted to avoid coming across the Gila Monster when hiking in Arizona you would want to avoid __________ and __________ because Gila Monsters are crepuscular.
Answer:
Gila Monsters are one of two types of venomous lizards in the world. If you wanted to avoid coming across the Gila Monster when hiking in Arizona you would want to avoid dusk and dawn because Gila Monsters are crepuscular.
Explanation:
Gila Monster avoid the heat for this they spend their time in burrows during the day. They are crepuscular, theirs activity is at dusk when the sun is setting and at dawn when the sun is rising. Gila Monster individuals avoid the heat and bright of the sun.
The scientific name is Heloderma suspectum, The colorful Gila monster is threatened by increasingly hot and dry weather.
Compare and contrast asexual and sexual reproduction. Be sure to include at least two similarities and three differences.
Prokaryotes and eukaryotes vs. only eukaryotes
Mitosis and binary fission vs. meiosis
Both forms of reproduction
Two vs. four cells produced
Diploid vs. haploid cells produced
Advantages or disadvantages of each
answer on e2020
Explain what Darwin Thought about different animals with similar characteristics living in similar habitats around the world?
carbohydrates have chemical bonds that are a good source of energy for living things. A monosaccharide is a carbohydrate made by plants when energy from the sun combines water and carbon dioxide.
how are two other types of carbohydrates formed? give examples of each type
The other two types of carbohydrates are Disaccharides: when two monosaccharides are joined together. Polysaccharide: when more than two monosaccharides are joined together.
What is a carbohydrate?Carbohydrates are biomolecules made up of carbon, hydrogen, and oxygen. They are of three types, monosaccharides, disaccharides, and polysaccharides.
Disaccharides when formed release water, an example is a maltose. An example of a polysaccharide is glycogen.
Thus, the two additional forms of carbohydrate are Disaccharides are constituted when two monosaccharides are combined. When more than two monosaccharides are combined, the result is a polysaccharide.
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Useful for measuring diseases that are difficult to pinpoint when an individual becomes a case, and for describing the magnitude of a public health problem is the:
Incidence and prevalence are two important measures used when describing the magnitude of a public health problem.
Explanation:When measuring diseases that are difficult to pinpoint when an individual becomes a case, and for describing the magnitude of a public health problem, two specific statistical measures widely used in epidemiological investigations are incidence and prevalence.
Incidence is a measure of the number of new cases of a disease during a specific time period, while prevalence refers to the total number of both new and existing cases in a population over time.
These measures help understand risk factors, disease spread, and provide an indication of the overall health of the population.
During emotional arousal, the ____ nervous system prepares the body for fight or flight and the ____ nervous system restores the body to homeostasis.
The answers in the given spaces above is sympathetic and parasympathetic. The sympathetic nervous system is the one responsible of having to activate the individual’s fight or flight response while the parasympathetic nervous system is responsible of having to do the things that the sympathetic nervous system can’t do.
What is the shortest period in which a population of darwin's finches can evolve?
The evolution of Darwin's finches, observable in changes in beak size, can occur within a single generation, as demonstrated by a study conducted by Peter and Rosemary Grant. This was particularly evident during periods of abnormal rainfall due to El Nino. This is a significant example of natural selection and evolution.
Explanation:The evolution of Darwin's finches, especially in relation to their beak sizes, offers a fascinating insight into the principle of natural selection. The study by Peter and Rosemary Grant indicates that these changes can occur within a single generation. This study involved analyses of the Galápagos finches, with particular attention to the medium ground finch on the Galápagos island of Daphne Major.
They found that during periods of abnormal rainfall due to El Nino, the availability of large, hard seeds reduced, which were, typically, food for large-billed birds. Conversely, there was an abundance of small, soft seeds which were favored by small-billed birds. This resulted in the small-billed birds being more successful in survival and reproduction.
In subsequent years, when the Grants measured the beak sizes within the population, they found the average beak size to be smaller. Hence, the shortest period within which a population of Darwin's finches can evolve is one generation, influenced by environmental changes and survival necessities. This is a significant example of natural selection and evolution.
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