Up to now, which is the strain that is killing the mice?
Smooth
Rough
Answers
The strain that is killing the mice is the "smooth" strain. In contrast, the rough strain did not have a capsule around it, which meant that the mouse's immune system could destroy it before it could cause any damage.The smooth strain was thus the strain that was killing the mice.
However, a more detailed answer is as follows:The experiment was conducted by Griffith, a British microbiologist. Griffith injected two strains of the Streptococcus pneumoniae bacteria into mice. These two strains were called the "smooth" strain and the "rough" strain.The smooth strain had a capsule around it that allowed it to evade the mouse's immune system, which enabled it to infect and kill the mice. In contrast, the rough strain did not have a capsule around it, which meant that the mouse's immune system could destroy it before it could cause any damage.The smooth strain was thus the strain that was killing the mice.
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Related Questions
Explain two ways in which mitosis is biological significant
Answers
Mitosis is a way of making more cells that are genetically the same as the parent cell. It plays an important part in the development of embryos, and it is important for the growth and development of our bodies as well. Mitosis produces new cells, and replaces cells that are old, lost or damaged.
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Which field of study would be most useful to a person who wants to preserve
endangered plant species?
A. Botany
B. Chemistry
C. Zoology
O D. Meteorology
Answers
B is science do no
C. Is study of the zoo
D. Study of Meteor
Do you think either students method would give more accurate results
Answers
Answer:
Hi There! OniTaku Here!
Explanation:
Student 1’s methods would be more accurate, because the student would control more factors. Only one variable at a time (either temperature or acidity) would be tested on each group of worms. On the other hand, Student 2 is testing both factors on all the worms, which could make the results unclear.
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Please help!!
Indicate which of the letters X, Y, and Z in the model represents DNA helicase, DNA polymerase, or hydrogen bonds
Answers
Answer:
Y hydrogen bonds
X DNA helicase
Z DNA polymerase
BRAINLIEST TO CORRECT ANSWER
Answers
Answer:
C (pictures a and b)
Explanation:
An element contains only 1 type of atom.
Due 11:59 PM
5 points
What are the 4 key principals of natural selection and how do they help a population undergo evolutionary change?
Answers
Answer:
Variation, Overproduction, Adaptation, Descent with Modification
Explanation:
Variation: Heritable differences that exist in every population are the basis for natural selection.
Overproduction: Competition between offsprings for resources.
Adaptation: a trait that helps an organism survive and reproduce
Descent with Modification: Natural Selection will result in species with adaptation that are well suited for survival and reproduction.
True or false Bands of magnetic material in the sea floor that have opposite poles, or exhibit magnetic reversal, can provide evidence for sea floor spreading
Answers
Answer:
yes
Explanation:
these poles can provide evidence for sea floor spreading.
are oxygen and hydrogen together a compound?
Answers
the principle of uniformitarianism states that ___.
a) a cross-cutting feature is younger than the rock layers through which it cuts
b) Rock layers at the bottom are older than Rock layers above them
c) sediment spreads out in flat, horizontal layers
d) geologic process that we observed today occurred the same way in the past
Answers
Answer:
D. Geologic process that we observed today occurred the same way in the past.
Explanation:
Hope this helped!A population of beetles is currently 60 beetles at n=0. The beetle population has an intrinsic growth rate of 150% each generation. The environment can sustain a maximum population of 130 beetles. Find the population of the next three generations, 'y_1' ' 'y_2' and 'y_3' of beetles
Answers
The population of beetles in the next three generations, considering the carrying capacity, is y1 = 130 beetles, y2 = 130 beetles, and y3 = 130 beetles.
The population of beetles can be calculated using the formula: y = y0 * (1 + r)^n, where y is the population at a given generation, y0 is the initial population, r is the intrinsic growth rate (expressed as a decimal), and n is the number of generations.
Given that the initial population (y0) is 60 beetles and the intrinsic growth rate (r) is 150% (or 1.5), we can calculate the population for the next three generations.
For the first generation (y1), we substitute y0 = 60, r = 1.5, and n = 1 into the formula: y1 = 60 * (1 + 1.5)^1 = 60 * 2.5 = 150 beetles.
For the second generation (y2), we substitute y0 = 60, r = 1.5, and n = 2 into the formula: y2 = 60 * (1 + 1.5)^2 = 60 * 6.25 = 375 beetles.
For the third generation (y3), we substitute y0 = 60, r = 1.5, and n = 3 into the formula: y3 = 60 * (1 + 1.5)^3 = 60 * 15.625 = 937.5 beetles.
However, since the environment can only sustain a maximum population of 130 beetles, we need to consider the carrying capacity.
To find the population at each generation while considering the carrying capacity, we compare the calculated population with the carrying capacity and use the smaller value as the population.
For y1, the population is 150 beetles, which exceeds the carrying capacity of 130 beetles. Therefore, y1 = 130 beetles.
For y2, the calculated population is 375 beetles, which is also above the carrying capacity. Thus, y2 = 130 beetles.
For y3, the calculated population is 937.5 beetles, which is still above the carrying capacity. Therefore, y3 = 130 beetles.
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Which category of organic molecule has the most chemical energy
Answers
Answer:
FatsExplanation:
Fats are storage of energy in form of organic molecules in our body.
What is the Liquid part of blood called?
Answers
Answer:
The liquid portion of the blood is called plasma.
Explanation:
hope this helps.
Sympathetic preganglionic fibers leaving the thoracic spinal nerves may ascend within the________ before synapsing so that they can exit near the head.
Answers
Sympathetic preganglionic fibers leaving the thoracic spinal nerves may ascend within the sympathetic trunk before synapsing so that they can exit near the head.
The sympathetic trunk is a paired bundle of nerve fibers that runs alongside the vertebral column and allows communication between the spinal nerves and the sympathetic ganglia. Sympathetic preganglionic fibers are short because of the close proximity of the ganglia to the vertebral column. Postganglionic sympathetic fibers are long because they must travel from the ganglia all the way to their target organs.
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4. According to the data in Tables, which planet in the solar system has the greatest
Answers
what table?
Explanation:
6. How are excess salts that accumulate in cells transferred to the blood stream so they can be removed from the body? Explain how this process works in terms of tonicity.
Answers
Answer:
Tonicity is the concentration of a solution compared to another, with regards to the number of solutes in these solutions. Too many solutes in a cell may cause them to be hypertonic hence absorb water too much water and lyse. Therefore, these solutes are excreted to the blood-stream through active transport and facilitated diffusion. These solutes are then excreted by the kidneys. If they are not excreted, the osmotic pressure (due to the inflow of water to the bloodstream by osmosis) may cause high blood volumes being pumped by the heart hence high blood pressure
Explanation:
Tonicity is the concentration of a solution compared to another, with regards to the number of solutes in these solutions. Too many solutes in a cell may cause them to be hypertonic hence absorb water too much water and lyse.
What is excreted from the blood stream?The solutes are excreted to the blood-stream through active transport and facilitated diffusion. These solutes are then excreted by the kidneys. If they are not excreted, the osmotic pressure due to the inflow of water to the bloodstream by osmosis may cause high blood volumes being pumped by the heart hence high blood pressure.
Osmosis is the net movement of water across a semi-permeable membrane from an area of lower gradient concentration to an area of higher gradient concentration. On the other hand, tonicity is the ability of an extracellular fluid to make water move into or out of a cell through osmosis. A solution's tonicity is related to its osmolarity or the total concentration of the solutes in a solution.
Therefore, Tonicity is the concentration of a solution compared to another, with regards to the number of solutes in these solutions.
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What are the degradations made by detrital rocks?
Answers
Answer:
Sedimentary rocks can be organized into two categories. The first is detrital rock, which comes from the erosion and accumulation of rock fragments, sediment, or other materials—categorized in total as detritus, or debris. The other is chemical rock, produced from the dissolution and precipitation of minerals.
Explanation:
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An insertion mutation usually causes more defects than a point mutation because insertion mutations _____.
Answers
An insertion mutation typically causes more defects than a point mutation because insertion mutations involve the addition of extra nucleotides into the DNA sequence.
This insertion disrupts the reading frame of the gene, leading to significant changes in the subsequent amino acid sequence during protein synthesis. As a result, the protein produced from the mutated gene may have an altered structure or function, potentially leading to more severe consequences.Insertion mutations can have various effects on the protein. They can introduce premature stop codons, resulting in a truncated and non-functional protein. Alternatively, the insertion can shift the entire reading frame downstream, leading to a completely different sequence of amino acids. This disruption often renders the protein non-functional or significantly impairs its normal activity.In contrast, point mutations involve the substitution of a single nucleotide, which may or may not result in a change of amino acid. While point mutations can still have detrimental effects, they are generally less disruptive than insertion mutations, as they do not alter the reading frame or introduce significant changes to the protein structure.For more questions on DNA sequence
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An engineer is developing a new prosthetic leg to help patients who have lost limbs to walk. The engineer is focused on making the best device possible to address this medical need. The current device design will cost $I0,000 to manufacture, but the cost ofthe item cannot exceed $8,000. How should the engineer approach this problem using the engineering design process?
Answers
Answer:
the engineer needs to consider alternatives for all of the areas of the design process that are considered costs
Explanation:
In order to accomplish this, the engineer needs to consider alternatives for all of the areas of the design process that are considered costs. This includes materials, marketing, manufacturing, etc. Many times the material that is being used alone can skyrocket the cost of making a specific product. Therefore changing to a new material may lack some of the wanted benefits but will reduce the overall cost. Manufacturing techniques can also drastically reduce costs by simplifying the process you save on electricity costs and worker wages, while still outputting the same amount of product, which in term reduces the overall costs of the item.
Metaphase in mitosis is characterized by
Select one:
A. lining up of sister chromatids down the center of the cell
B. separating of the sister chromatids
C. cytokinesis
D. separating of homologous chromosomes
Answers
Answer:
A. lining up of sister chromatids down the center of the cell.
Explanation:
Hope that helps! If not, let me know. I just took Life Science last year, so I still know that kind of stuff... (for now...)tehehe
The appendix, an extension of the large intestine appears, although this is debated, to have little
function in humans. What is the appendix an example of in terms of evidence for evolution?
Answers
Answer: Vestigial organ
Explanation:
Vestigial organs are those organs which were functional in ancestral organisms belonging to the same species but due to the course of evolution of body forms they become non-functional. They can be found in the body either in the same form as used to appear in the ancestors or in rudimentary or degenerated forms.
The human appendix is one of the examples of vestigial organs. It looks like a narrow tube which forms a link with a colon of the large intestine. It was functional in human herbivorous ancestors as it used to help in digestion of variety of vegetables and other plant products. The change of diet along with due course of evolution caused the appendix to become useless. But the appendix physical form remained the same in humans.
What type of molecule controls photosynthesis
Answers
Answer:
Chloroplasts, I believe
Explanation:
What does the formula below represent? CO2 + H20 → C6 H12 06+02
Answers
Answer:
Photosynthesis
Explanation:
Why antibodies raised against a native protein sometimes fails to bind to the corresponding denatured protein
Answers
Antibodies raised against a native protein sometimes fail to bind to the corresponding denatured protein due to the changes in the protein's structure caused by denaturation.
Denaturation is the process by which a protein loses its three-dimensional shape and native conformation due to the disruption of non-covalent bonds that stabilize its structure.
These bonds include hydrogen bonds, electrostatic interactions, and hydrophobic interactions. Denaturation can be caused by various factors such as heat, pH changes, and chemicals. As a result, the protein's tertiary and quaternary structures are disrupted, causing the protein to become unfolded and lose its original shape.
Antibodies raised against a native protein are specific to the three-dimensional structure of the protein. They recognize and bind to specific epitopes on the surface of the protein.
However, when the protein is denatured, the epitopes may be destroyed or altered, making them unrecognizable to the antibody. Therefore, the antibody may fail to bind to the denatured protein.
Antibodies raised against a native protein sometimes fail to bind to the corresponding denatured protein due to the changes in the protein's structure caused by denaturation. This highlights the importance of using the appropriate antibody and protein conformation in experiments.
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What do plant cells use to get energy from the sun
Answers
Answer:
Photosynthesis
Explanation:
Plant cells obtain energy through a process called photosynthesis. This process uses solar energy to convert carbon dioxide and water into energy in the form of carbohydrates.
What causes the Pacific Ring of Fire to have so many volcanoes.
Answers
Use your periodic table of elements. Take any element from the first column, except for hydrogen and lithium, and answer the following questions:
What is the element's name and symbol?
Is it a metal, nonmetal, or metalloid?
Which family does it belong to?
How many protons, neutrons, and electrons does its neutral atom have?
This is science
Answers
Explanation:
Potassium (K)
Metal.
19 Protons, 20 Neutrons, 19 electrons
Alkali Metals
Sodium is an element in the periodic table which is a metal as it has a net positive charge. The valency of this element is +1. It can donate an electron to achieve the octet and hence stability.
What are chemical elements?
Chemical elements are the substances which cannot be decomposed into further simpler substances by any ordinary chemical process. These are presented in the periodic table on the basis of their atomic number.
Sodium is an element which belongs to the alkali metals family. Sodium element can be denoted by the symbol Na. The element is a metal as it has a net positive charge. It can donate one electron from its valency shell to achieve the octet which gives it stability. Therefore, the valency of the element is 1. The element has 11 protons, 11 neutrons and 11 electrons.
This can be represented as: ¹¹Na₂₂
where, Na is the symbol of sodium
11 is the atomic number = number of protons in the element
22 is the atomic mass = number of protons+ number of neutrons in the element.
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Was John's hypothesis supported or rejected? Use data to discuss this. Which fertilizer worked the best? Explain your answer using data from your table. Which plant did not grow well? Explain your answer using data from your table. Describe how the investigation could be tested further.
Answers
a. John's hypothesis that organic fertilizer would make the plants grow taller was not supported.
b. the chemical fertilizer worked the best in promoting plant growth compared to the organic fertilizer and the absence of fertilizer.
c. The plant that did not grow well was the one without any fertilizer.
d. One can further test the investigation by increasing the sample size and repeat the experiment.
How do we calculate?a. Based on the data provided, John's hypothesis that organic fertilizer would make the plants grow taller was not supported but the plant with the chemical fertilizer grew the most.
b. The plant with organic fertilizer showed some growth but was consistently shorter than the plant with chemical fertilizer. The plant without any fertilizer showed minimal to no growth, indicating that fertilizer, whether organic or chemical, is necessary for optimal plant growth.
c. The plant that did not grow well was the one without any fertilizer as it had minimal growth throughout the observation period, with a final height of only 0.2 cm on day 10.
d. Increasing the sample size instead of using only one seed per pot, multiple seeds could be planted in each pot to account for individual variation and enhance the statistical reliability of the results.
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Complete question:ohn had a science fair project that he needed to do. He wanted to test the effects that organic and chemical fertilizers had on plant growth. John predicted that the organic fertilizer would make the plants grow taller. He used three pots, three of the same type of seed, soil, organic fertilizer, chemical fertilizer, water, and a ruler. John put soil in the pots. He added chemical fertilizer to the first pot, organic fertilizer in the second pot, and no fertilizer in the third pot. He then planted one seed in each pot. John had to water the pots daily. He also checked for growth and took measurements for a period of 10 days. He measured the height of the plants.Days No Fertilizer (cm) Chemical Fertilizer (cm) Organic Fertilizer (cm)1 0 0 02 0 0 03 0 0 04 0 0 05 0 0.5 06 0 1.3 07 0 1.9 0.38 0 2.2 1.69 0 4.5 3.210 0.2 5.2 3.8John made a data table to record his measurements.After the 10th day, John observed that the plant with the chemical fertilizer grew the most.Was John's hypothesis supported or rejected? Use data to discuss this. Which fertilizer worked the best? Explain your answer using data from your table. Which plant did not grow well? Explain your answer using data from your table. Describe how the investigation could be tested further.
Briefly summarize the steps of the six natural cycles of Earth.
1. rock cycle
2. tectonic cycle
3. water cycle
4. carbon cycle
5. nitrogen cycle
6. phosphorus cycle
Answers
Tectonic cycle- the movement of large portions of earths crust (plates) the driving forces that move these plates are a combination of events that occurs within the earth.
Water cycle- the path of all water followers as it moves around earth in different states, water vapor, ice, water...
Carbon cycle- series of processes by which carbon compounds are inverted in the environment involving the incorporation of carbon dioxide into living tissue by photosynthesis.
Nitrogen cycle- series of processes by which nitrogen and is compounds are introverted in the environment and living organisms.
Phosphorus cycle-biochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.
Question 1 (1 point)
What means of particle transport requires energy?
a
Passive
b
Active
C
Facilitated
d
Osmosis
Answers
Answer:
c
Explanation:
Answer:
C- facilitated
Explanation:
Facilitated diffusion does not require additional energy. Active transport is the movement of particles across the cell membrane using energy.
which are common cell shapes?multiple select question.column-likecube-likeconicalsphericalhelicalspiral
Answers
Cells are the basic structural and functional units of living organisms. They are classified into many types, each having its distinct shape and function. The following are the common cell shapes:1. Spherical Cells: Spherical cells are round cells.
Examples of spherical cells include red blood cells and fat cells.2. Columnar Cells: Columnar cells are long and thin cells. Examples of columnar cells are cells in the lining of the small intestine.3. Conical Cells: Conical cells are cone-shaped cells. Examples of conical cells are sperm cells.4. Cuboidal Cells: Cuboidal cells are cube-shaped cells. Examples of cuboidal cells are the cells of the liver.5. Spiral Cells: Spiral cells are shaped like a spiral. Examples of spiral cells are some bacteria.6.
Helical Cells: Helical cells are long and curved cells. Examples of helical cells are the cells of the inner ear. The correct answer is: Spherical, columnar, conical, cuboidal, spiral, and helical.
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