Answer:
See the answer below
Explanation:
The discovery of Gram staining has revolutionized how microbes, especially bacteria, are classified. Bacteria that are positive for Gram staining are classified as Gram-positive while those that are negative to the procedure are termed Gram-negative.
What constitutes positivity or negativity to the Gram staining procedure is the ability of the cell walls of bacteria to either retain a dye or allow it to be washed off during the procedure. The components of the cell wall differentiate Gram-positive bacteria from the Gram-negative ones and confer the ability to retain dye on the former. Gram-positive bacteria have thick peptidoglycan cell walls and lower lipid contents as compared to the Gram-negative bacteria and with this, they are able to retain the color of the stain used during the Gram staining procedure.
During the Gram staining, a scoop of the bacterial isolate is usually smeared and heat-fixed to a glass slide. Thereafter, crystal violet drops are added to the slide, poured off, and then rinsed with water. A few drops of iodine are then added and allowed to stay for a few seconds before being poured off and rinsed. A decolorizer (an alcohol) is then added to the slide, allowed to stay for a few seconds before it is washed off. The addition of a counterstain follows and the slide is allowed to stay for another few seconds before the stain is washed off. The slide is then rid of water and then viewed under the microscope. A Gram-positive bacterium will able to retain the color of the dye which is purple while a negative bacterium will lose the color of the dye and appear red under the microscope.
animal cells have structures that perform specific functions in the cell. Mitochondria are oranelles that float within the cell. Because they produce most of the cell’s energy, mitochondria are nicknamed the “powerhouse of the cell”.
which of the following types of cells would have the greatest number of mitochondria?
skin cell
blood cell
muscle cell
fingernail cell
Answer:
skin cell because the skin is considered the largest part of the cell tissue based on order.
E. coli Is a species of bacteria that causes many different Infections in humans. Certain E. coli strains have developed resistance to antibiotics,
making Infections with these strains difficult to treat. How do bacteria such as E. coll, which reproduce asexually, galn new tralts such as
antibiotic resistance?
O A. by adapting to changes in environmental conditions without undergoing changes in their DNA
OB. by mutating their DNA in response to environmental conditions to gain beneficial traits
OC. by undergoing spontaneous mutations when they replicate, which increases genetic variation in a population
OD. by producing offspring with new gene assortments from genetic recombination, which increases diversity in a population
Answer:
The correct answer would be B
Explanation:
Antibiotic resistance in bacteria develops in response to the environment in which the bacteria survives.
The antimicrobial resistance trait is acquired by any species of bacteria through one of the two ways that are either by making changes in their DNA sequences or through horizontal gene transfer mechanisms.
In the given E. coli gained the trait to develop resistance against antibiotic by making changes in their DNA as once the gene is altered or mutated, the trait can be passed on to the offsprings.
Therefore, Option-B is the correct answer.
Answer:
B. By mutating their DNA in response to environmental conditions to gain beneficial traits
Explanation:
Through the process of natural selection, bacteria such as E coli can gain new traits that benefit them.
This can occur when a DNA mutation occurs, where the mutated gene is actually beneficial to respond to environmental conditions.
Then, these bacteria with the gene will survive and produce more offspring with the same gene. This is how E coli can develop antibiotic resistance.
So, B is the correct answer.
what are the defining characteristics of the animal cell
Answer:
in the explanation ALSO PLEASE ANSWER MY LATEST QUESTION PLEASE ITS A TIMED TEST.
Explanation:
animal cells have a nucleus and other membrane-bound organelles Unlike the cells of plants and fungi, animal cells lack a cell wall. This gives animal cells flexibility.
Write two differences between the unicellular and multicellular organisms.
what is a cell membrane
Answer:
The cell membrane is the semipermeable membrane of a cell that surrounds and encloses its contents of cytoplasm and nucleoplasm. The cell membrane separates the cell from the surrounding interstitial fluid, the main component of the extracellular fluid.
Explanation:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. ... Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions
Answer: The cell membrane is the semipermeable membrane of a cell that surrounds and encloses its contents of cytoplasm and nucleoplasm. The cell membrane separates the cell from the surrounding interstitial fluid, the main component of the extracellular fluid.
Explanation:
Cell membrane, also called plasma membrane, thin membrane that surrounds every living cell, delimiting the cell from the environment around it.
Quick question. What is this? Should I move out???
Answer:
thats a bed bug you're screwed
How can you distinguish A from B? In this lab, you will do experiments to identify types of changes. Using the question format you learned (shown above), write an investigative question that you can answer by doing these experiments.
Answer:
How can you distinguish a physical change from a chemical change?
edge 2021
Answer:
How can you distinguish a physical change from a chemical change?
Explanation:
Edge 2023
A hurricane sweeps across the ocean and damages the houses of people living along the coast. This is an example of interactions between the
biosphere, atmosphere, and sand
hydrosphere, sand, and biosphere
atmosphere, sand, and hydrosphere
atmosphere, hydrosphere, and biosphere
Answer:
I think its atmosphere, sand, and hydrosphere
Explanation:
good luck :)
Can you give me an example of an amphibian close to extinction?
Answer:
frogs or salamanders
Im 4 and my sis is 13. SHE told me she was on her period but then I told her there was this thing called subject and predicate and how she isnt supposed to have a period at the end of her statement because it wouldnt make any sense... and ya, it didnt go well cause' she put on a tantrum.
But the weird thing is that Google said this "Tantrums are most common between the ages of one and four, then decrease when children start school." SO HOW COME I DIDN"T HABE A TANTRUM!! life makes no sense.
P.S: I even saw mom buying DiApERS for her! Like I stopped my diapers and got potty trained about 1 or 2 months ago and IM 4yrs old. SHE IS 13.
man she must have a hard time walking with those things in her short skinny pants.
AND lm A boy by the way.
Answer:
Stop the cappin
Explanation:
Answer:
Please destroy your tablet.
Explanation:
First of all, why are you on Brainly when you're 4.
And second of all, you're sister is wearing short pants, so she is going through a lot right now. Even 13 year old's have tantrums.
cell is immersed in a
Plasmolysis occurs when a/n)
solution.
O animal; 3X salt solution
O plant; pure water
O animal; pure water
O plant; 3X salt solution
Answer:
Plasmolysis occurs when a plant cell is inmersed in a 3X salt solution.
Explanation:
Plasmolysis is a phenomenon only observed in plant cells, and consists of cell dehydration accompanied by separation of the membrane and cell wall when the cell is exposed in a hypertonic environment.
When a plant cell is in a hypertonic solution —such as 3X salt solution— the permeability of its membrane allows water to escape, so the cell dehydrates and reduces its size. The cell wall is rigid and maintains its shape, but the cell membrane separates from it, which is known as plamolysis.
The other alternative answer combinations are not correct because:
Plamolysis does not occur in animal cells. Pure water does not produce plasmolysis.During which phase of meiosis does the separation of homologous chromosomes occur?
Answer:
In anaphase I, centromeres break down and homologous chromosomes separate. In telophase I, chromosomes move to opposite poles; during cytokinesis the cell separates into two haploid cells.
Let me know if this helps
Thanks :)
Explanation:
WHY ARE C-19 (CORONA VIRUS) NOT ACCURATE AS TOLD?
because it is a new virus that us humans have not experienced and we are still learning about it
EXPLAIN 2 DIFFERENCES BETWEEN THE BREAD MAKING ANDALCOHOL PRODUCTION PROCESSES.
Answer:
Pastry dough is rolled out thinly and used as a base for baked products. Pastry is differentiated from bread by having a higher fat content, which contributes to a flaky or crumbly texture. ... On the other hand, overmixing results in long gluten strands that toughen the pastry.
Think and discuss:Suppose you are a farmer trying to grow plants in a greenhouse. Why would it be important to know what the limiting factor is
Answer:
Because limiting factors affect plant growth
Explanation:
A limiting factor is a condition that limits the population's growth in an ecosystem by slowing or stopping its growth. These factors are generated by the lack or excess of a particular resource. In plants, limiting factors include, among others, light, water, temperature, oxygen, food, (i.e., nutrients and minerals), space, etc. In this case, the farmer must know which greenhouse conditions are limiting factors in order to ensure the survival and optimal development of the plant population.
Pls help if u know the answer
PLS HELP...
Marley has a vegetable garden in her yard. During a recent storm, heavy rains fall and some of her garden soil is watch away. Which term BEST describes the movement of the soil from one place to another?
Erosion
Runoff
Deposition
Weathering
Answer:
runoff
Explanation:
What is an equinox and when does it happen?
An equinox is commonly regarded as the instant of time when the plane (extended indefinitely in all directions) of Earth 's equator passes through the center of the Sun. This occurs twice each year: around 20 March and 23 September.
Answer:
An Equinox is commonly regarded as the instant of time when the plane of Earth's equator passes through the geometric center of the Sun's disk. This occurs twice each year, around 20 March and 23 September. In other words, it is the moment at which the center of the visible Sun is directly above the equator.
Explanation:
In passive transport, molecules move__ the concentration gradient.
Answer:
In passive transport, molecules move with the concentraction gradient.
Explanation:
If molecules moved against it would be active transport.
Passive transportation has been defined as the mode of molecule movement across the semi-permeable membrane. "In passive transport, molecules move down the concentration gradient."
What is passive transport?Passive transport has been the mode of movement of the ions and molecules from the exterior and interior of the cell through the plasma membrane. This mode of transportation has been characterized by the movement of the ions from the region of a higher electrochemical gradient.
The ions tend to move towards the region that lacks the electrochemical gradient, hence it is a movement in the direction of the lower concentration. The solute particles do not external source of energy to drive the movement from higher concentration areas.
It is a type of diffusion that uses the law of Thermodynamics to move the ions up and down the cell concentration. The movement of the oxygen gas in the body cells is an example of passive transportation.
Therefore, the ions move down the concentration gradient in the passive transport.
Learn more about passive transport, here:
https://brainly.com/question/13542102
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what change in a population would you expect to see if a selection pressure was against the traits of the dominant allele?
The change in population in the given condition would be an increase of true recessive traits in the population and there would be only a few individuals with dominant traits.
In case of selection pressure was against the dominant trait, then individuals of the population who have true recessive alleles would have an advantage over the heterozygous and dominant individuals of the population.
There would be very few individuals carrying its dominant genotype and it may eventually be extinct, however, it would be still dominant. The recessive trait would just become more prominent rather than becoming dominant.
Thus, the number of recessive traits would increase in population, and the number of dominant decrease to numbers.
Learn more about selection pressure:
https://brainly.com/question/18592700
Decrease occur in the population of dominant allele occurs.
Change in a population of dominant allele occurs if a selection pressure was against the traits of the dominant allele because the selection pressure is against the dominant allele that leads to appearance of recessive allele and disappearance of dominant allele. The selection pressure is responsible for the appearance of allele in the offspring so we can conclude that dominant allele is decreases in the population of the future generation.
https://brainly.com/question/18999457
A lamp that plugs into a wall socket draws energy which flows through a thin wire in the bulb causing it to glow. What energy transformation are taking place?
choices:
Chemical>light>electrical
Mechanical>sound>light
Thermal>solar>electrical
Electrical>thermal>light
Answer:
Electrical>thermal>light
Explanation:
Electrical energy refers to energy which is gotten from potential energy. This energy source could be a wall socket.
Thermal energy on the other hand refers to internal energy of a system where temperature is constant.
Light energy is made up of photons which transmits electromagnetic radiation which move in waves and become visible to human eye.
Therefore, the energy transformation taking place according to the question is option D.
Which set of organelles would be found in both human and lemon tree cells.? F chloroplast,nucleus, and cell wall. G nucleus, endoplasmic reticulum, and cell wall. H mitochondria,nucleus, and endoplasmic reticulum. J mitochondria, chloroplasts, endoplasmic reticulum, and centrioles
Answer:
Mitochondria, nucleus, and endoplasmic reticulum, and centrioles
Explanation:
trust me
Can I please get the answer ?
Answer:
The answer is A. water, carbon dioxide, and energy.
Explanation:
What does it mean to say that the U.S. Government has a balanced budget?
Explanation:
A balanced budget occurs when revenues are equal to or greater than total expenses. A budget can be considered balanced after a full year of revenues and expenses have been incurred and recorded.
Once the DNA strand unwinds and is modified; it sent through the
nucleus for translation. What stage of translation would most likely
occur at letter A?
A) initiation
B) elongation
C) termination
D) RNA processing
Answer:
I think it is A.
Explanation:
Tropical, temperate, and polar describe climate zones due to
A. latitude.
B. rainfall amount.
C. temperature.
D. snowfall amount.
If the organisms in this food chain shown below were arranged in an energy pyramid, which organism would have the most available energy? C SRED producer decomposer primary consumer secondary consumer O producer O decomposer O primary consumer O secondary consumer
The atomic mass of an atom is the weight of
?
Answer:
No the atomic mass is the same as the atomic number
Explanation:
How is the blackjack seed suited to its method of dispersal?
Answer:
Seeds are widely dispersed through the fruits hook-like bristles that embed themselves in clothing and the fur of mammals and feathers of birds. They are also spread by wind, water and soil.
Explanation:
Can somebody please help me label this map please!!!!
What do you think is happening in this picture?
Answer:
the dot are tranporting to the other section Explanation:need a bit mor
info tho
What is an organism’s phenotype? its specific set of physical traits. the number of genes in its genome. its specific set of genes. the number of nucleotides in its genome
Answer:
A
Explanation:
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