MacConkey agar (MAC) is selective and differential bacterial culture media.
was, developed by Alfred Theodore MacConkey in 20th century.
It contains the essential nutrients required for microorganism growth.
MacConkey agar contains 4 components-
1. lactose,
2. bile salts
3. crystal violet
4. neutral red
Bile salts and crystal violet act as selective agents and they make the agar selective
Selective because it is selective to gram negative bacteria.
example, staphylococcus gives pale pink color in M.A because it is able to grow in this medium.
Differential because as it contains lactose it differentiates between gram negative lactose fermenter and gram-negative non-fermenters.
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Which type of rock would be described as layered pieces of other rocks and fossils?.
Mudstone, shale, and limestone can be called as sedimentary rock have probability to contain fossils. As the layers of sediments collects on top of each other, they forms physical timeline. The earliest layers, along with the organisms that were fossilized as they formed, are bottomless. The new layers are seen at the top.
Sedimentary rocks are formed by various tiny sediments or rocks. They are formed on or near the Earth's surface, in distinction to metamorphic and igneous rocks, which are developed deep within the Earth.
These are also described as stratified rocks as strata is organised in layered pieces.
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What are some advantages of using a model for teaching about organs rather than using an actual organ?
Answer: Safety, usage, health.
Explanation: It is safer to use a model as it can't gain germs or bacteria or rot like an actual organ. Easier to get than to buy one from a dead organism. The rot or bacteria could be a health risk. You can use it for a longer period of time than an actual organ. If you drop it there could also be issues with that.
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what is a type of body plan in which an animal's body is divided into nearly identical units? multiple choice question.
Answer: Segmented body plan
Explanation:
this joint is the largest and most complex of the body, and consists of three joints contained within its snyocial cavity
The most extensive and intricate joint in the body is the knee.
How many different kinds of joint explain?The structural classification of joints divides them into three categories: fibrous, cartilaginous, & synovial joints. Fibrous joints are those in which collagen-rich, thick connective tissue connects the bones. Sutures is another name for these joints. Cranium joints between bones are made of fibrous tissue.
Which two main types of joints are there?Diarthrosis, in which liquid is present, & synarthrosis, in which liquid is absent, are the two fundamental structural forms of joint. The synovial joints, also known as diarthroses, are entirely permanent. While some synarthroses are temporary, others are enduring.
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Which statement forms part of cell theory
Explanation:
There are three principles of cell theory
all organisms are composed of one or more cellsThe cell is the basic unit of structure and organizationcells arise from pre-existing cellsWhat would be problematic about making one side of the sowbug/pillbug chamber hot and dark while the other side is cool and illuminated?.
Making one side of the sowbug or pillbug chamber hot and dark while the other side is cool and illuminated would be problematic because: the bugs might prefer light environments but dislike cool backgrounds. It would be not easy to compare two differences simultaneously and there would be confounding variables.
What are the confounding variables?Confounding variables are the third variable that influences both dependent and independent variables. This variable could distort the associations between the two variables. If we make one side of the sowbug hot and dark while the other side is cool and illuminated, the true relationship between the two variables will not be accurate.
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After an initial infection, b-cells recognize the measles virus. How is this helpful in human immune response?.
Answer: Accelerates Immune Response in the event the antigen is present again.
Explanation:
B-cells function is to memorize the characteristics of the antigen that activated their parent B cell during initial infection such that if the memory B cell later encounters the same antigen, it triggers an accelerated and robust secondary immune response.
Which of these is something that is present ONLY in plant cells?
A. mitochondria
B. nucleus
C. chloroplast
D. DNA
dcpip (2,6-dichlorophenol-indophenol), a blue dye, can act as an electron acceptor and becomes colorless when reduced. a suspension of chloroplasts is prepared, and dcpip is added to the suspension. the sample is split into two test tubes. one test tube is exposed to light and the other is wrapped in foil (dark control). what would you observe over time comparing the light exposed and the dark control test tubes?
The light exposed test tubes will become colorless while dark test tubes will remain blue.
During the light reaction, the photolysis of water occurs. The breakdown releases hydrogen ion and electrons which are further used for reduction of NADP. The reduced NADPH contributes to the ATP generation.
Now, DCPIP also accepts the electron. So, during the light reaction in test tube exposed to light, the photolysis of water will occur followed by reduction of DCPIP. Thus, it will become colourless. Dark test tube wil not have the same reaction and hence DCPIP will remain blue in colour.
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studies of rough-skinned newts have documented their ability to produce toxins in defense against a predator attack. the common garter snake, a predator of rough-skinned newts, exhibits a resistance to the toxin produced by the newt. in response, newts have been observed to produce increasingly potent toxins, which in turn results in selection for snakes with even greater resistance to the toxin. what phrase best describes this interaction between rough-skinned newts and garter snakes? group of answer choices host-parasite coevolution obligate mutualism evolutionary arms race diffuse coevolution
Evolutionary arms race best describes the interaction between rough-skinned newts which have the ability to produce toxins against their predator garter snakes.
What is an evolutionary arms race?
It is an ongoing struggle between competing sets of co-evolving genes, and phenotypic and behavioral traits that develop escalating adaptations and counter-adaptations against each other.
One example is the arms race between bats and moths. In this, the weaponry used by each is largely based on sound and hearing.
In the above case, rough-skinned newts are compared to the host and the common garter snake is compared to a parasite. Rough-skinned newts produce toxins in defense against a predator (common garter snake). This predator exhibits resistance to the toxin produced by the newt. in this way, if the newt increased potent toxins then a common garter snake too increases its resistance to the toxin. Common garter snakes exhibit an evolutionary arms race by evolving rough-skinned newts.
Let us discuss other options
Mutualism is a relationship between two organisms each benefiting from the relationship.Host-parasite coevolution is a special case of coevolution where a host and a parasite continually adapt to each other.Diffuse coevolution also called guild coevolution where whole groups of species interact with other groups of species leading to changes that cannot really be identified.Hence rough-skinned newts and common garter snakes exhibit an evolutionary arms race.
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what is the name of the compound in the weed killer that many suspect is linked to non-hodgkin lymphoma (nhl)?
Glyphosate is the compound in the weed killer that many suspect is linked to non-hodgkin lymphoma (nhl).
What is Glyphosate?An pesticide called glyphosate is used to manage weeds and grasses. It serves as the primary ingredient in a variety of herbicides, including the well-known Roundup. Since 1974, glyphosate has been approved for use as a pesticide in the United States. It is also widely used in many other nations around the world. Weed killers and herbicides both use the term glyphosate as an active ingredient.
Glyphosate is a phosphonic acid created when the amino group of glycine reacts with the methyl group of methylphosphonic acid. The enzyme 5-enolpyruvyl-3-shikimate phosphate synthase is the only one that this herbicide targets (EPSPS).
A broad-spectrum herbicide is glyphosate. It cannot, therefore, be used to kill particular weeds or plants. Instead, it obliterates the majority of the area's broadleaf vegetation.
The mechanism of action of glyphosate is the inhibition of a plant enzyme involved in the synthesis of the three amino acids phenylalanine, tyrosine, and tryptophan.
Only a very small amount of glyphosate is absorbed into plants' roots; most of it enters through the leaves. Consequently, only grass and weeds that are actively growing can be killed by glyphosate. It is unable to prevent seeds from ever germination.
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Match the following facts about food chains and food webs.
______ show one set of predator/prey relationship
______ show all predator/prey relationships in the ecosystem
______ shows how energy is passed through different consumers
______ Does not include producers
a. Both food chains and food webs
b. Food chains
c. Food webs
d. Wrong since both food chains
and food webs do this
Answer:
- Food chains show one set of predator/prey relationship
- Food webs show all predator/prey relationships in the ecosystem
- Both food chains and food webs shows how energy is passed through different consumers
I'm pretty sure this is correct. I hope it helps :)
the digestive tract in humans harbors a diverse microbial community, starting with the mouth which is colonized mainly by a number of species of
The digestive tract in humans harbors a diverse microbial community, which is colonized mainly by a number of species of Streptococcus.
Streptococcus is a genus of spherical bacteria that belongs to the family Streptococcaceae. These bacterias produce d-lactic acid, a type of acid that, if produced excessively, can lead to lactic acidosis.
Besides lactic acidosis, these bacteria can also cause many health problems, such as:
Strep throat, which is caused by group A Streptococcus. The symptoms include fever, sore throat, and swollen lymph nodes in the neck.Scarlet fever is also caused by group A Streptococcus.Pneumonia, which is caused by a group B Streptococcus. Streptococcus pneumoniae.Learn more about Streptococcus at https://brainly.com/question/22774534
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what are the different types of information? group of answer choices levels, forms, granularities levels, forms, data levels, formats, granularities data, formats, granularities
The different type of information are Levels, formats , granularities.
The levels app assigns a metabolic rating to each meals to can help you realize the way it affects your blood sugar. The app will even assign a rating for every day which helps you to appearance returned to see trends. You could see that I generally tend to eat worse starting Friday thru Sundays.
When you first sign up for degrees, the full value might be $398 USD.
There are numerous varieties of degrees inclusive of dumpy degree, Y degree, cushing's degree, tilting level, cooke's reversible degree and automated degree gadgets for leveling in surveying. The technique of measuring vertical distances in surveying is known as leveling.
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what is meant by translocation? view available hint(s)for part f what is meant by translocation? the two ribosomal subunits are joined in a complex. the ribosome slides one codon down the mrna. the polypeptide chain grows by one amino acid. the completed polypeptide is released from the ribosome.
The ribosome slides one codon down the mRNA. Option B.
Transcription is the technique of the producing of RNA from DNA. Translation is the gadget of the formation of protein from RNA. Translocation is the motion of substances in vegetation from the leaves to other elements of the plant. Translation takes area at the ribosome, which includes rRNA and proteins. In translation, the instructions in mRNA are take a look at, and tRNA brings the perfect collection of amino acids to the ribosome.
Metabolic techniques, particularly the products of photosynthesis are transported from the leaves in which they may be formed to unique factors of the plant. This shipping of soluble photosynthetic products is known as translocation and takes vicinity in a part of the vascular tissue called the phloem. A mutation wherein non-homologous chromosomes change stretches of DNA. Autosomal issues. Autosomal troubles affect each women and men.
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the pharmacological suppression of pain impulses at the level of the spinal cord induces which effect?
The pharmacological suppression of pain impulses at the level of the spinal cord induces which effect is Analgesia.
Hepatotoxicity from NSAIDs can occur at any time but is most likely 6 to 12 weeks after administration. Risk factors for NSAID-induced idiosyncratic hepatotoxicity include female sex age 50 years and underlying autoimmune disease. Because prophylactic analgesia is an antinociceptive treatment given before incision or surgery, it is important to remember the timing of prophylactic analgesia.
This prevents the occurrence of changes in afferent input processing that increase postoperative pain. The strongest prescription pain relievers are opioids. Although they are highly effective people who take them run the risk of addiction and overdose. Since pain relievers have side effects and risks, non-pharmacological remedies should be tried first. Glutamate is the major excitatory neurotransmitter in the adult mammalian nervous system.
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When building a new
complementary strand, each
strand of the DNA molecule
serves as which of these?
During DNA replication, each of the two strands that make up the double helix serves as a template from which new strands are copied.
What is template?
The DNA polymerase enzyme bases the replication of DNA on a single strand of DNA known as a DNA template.
The double-stranded DNA is divided into two single-stranded molecules during the replication process. After working with these single strands, the DNA polymerase creates a fresh second strand of DNA on each of the two single strands. You just need one strand of DNA, which may be used as a template to replicate the missing strand of DNA thanks to complementary base pairing in DNA (A-T and G-C).
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one cup of soft-serve ice cream contains 38 g of carbohydrate, 11 g of protein, and 18 g of fat. how many calories are there in a cup of soft-serve ice cream? one gram of carbohydrate supplies roughly 4 cal of energy. one gram of protein provides 4 cal of energy, and one gram of fat supplies 9 cal of energy.
Total calories in one cup of soft-serve ice cream that contains 38 g of carbohydrate, 11 g of protein, and 18 g of fat is 358 calories.
The nutrition facts given in the problem:
Carbohydrate supplies 4 calories per gram.
Protein supplies 4 calories per gram.
Fat supplies 9 calories per gram.
The soft-serve ice cream contains:
- 38 g of carbohydrate
- 11 g of protein
- 18 g of fat
Multiply each constituent with its energy content:
Energy from carbohydrate = 38 x 4 = 152 calories
Energy from protein = 11 x 4 = 44 calories
Energy from fat = 18 x 9 = 162 calories
Hence, energy total in the ice cream is 152 + 44 + 162 = 358 calories.
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• 100% 0.1% 1% ● ● Each level on the energy pyramid above represents one of these amounts of energy: 6 B 0.01% 10% E Every level in an energy pyramid represents a different amount of energy. Can you identify the energy available for each of the organisms shown below? Add the percentage of energy given to the butterfly to the energy of the eagle and the energy of the frog. This number is your code to advance to the next level. Make sure to include the % sign in your code (example: 25.23%).
each level only takes up 10 percent of the trophic level before it due the the energy used by the organisms in the previous trophic level.
What would be the result of a cell that completed mitosis but did not successfully complete cytokinesis?
Answer:
Explanation:
two distinct, identical daughter cells.
Why might cells need to make new copies of
themselves? Do all Cells reproduce in the same way? What are the steps of Mitosis?
What happens at each step in the process? What happens when cells lose control
over their ability to divide? How could this happen?
Cells divide for the purpose of survival and growth of organisms. This way, chromosome numbers are maintained and damaged cells are renewed as well.
What is Mitotis?
Mitosis is the division of cells which results in the formation of two daughter cells. They both have the same number and kind of chromosomes as the parent cell.
Mitosis involves the following phases:
Prophase is where the chromosomes shorten in length and thicken.Metaphase is where the chromosomes line up in the center of the cell.Anaphase is where the chromatids break at the centromere after which they move to opposite poles.Telophase is where the two nuclei formed after nuclear envelopes reform around the groups of chromosomes.When cells lose their control over the ability to divide, they can accumulate genetic disorders that may lead to cancerous tumors. This happens when the normal cell cycle is disrupted and it therefore loses control.
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Based on the parent genotypes and using this Punnett Square, what percentage of offspring can display the recessive trait?
Responses
100%
100%
50%
50%
25%
25%
0% No offspring can display the recessive trait
Answer:
you need too go ask a tutor about this
Explanation:
Answer:0% No offspring can display the recessive trait
Explanation:
just did the test
A student draws a cell with a diagmeter of 43 mm. The actual size of this cell is 10 μm. What is the magnification
The magnification of the student's diagram is 4300.
How to calculate magnification?Magnification is the apparent enlargement of an object in an image.
To calculate the linear magnification of a drawing or image, the following equation should be used:
Magnification = Image size (with ruler) ÷ Actual size (according to scale bar)
According to this question, a student draws a cell with a diameter of 43 mm. The actual size of this cell is 10 μm.
The image size in μm is 43000μm
The magnification of the drawing = 43000 ÷ 10 = 4300
Therefore, 4300 is the magnification of the cell drawing.
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why does meitosis is called reduction division
Mitosis is known as the reduction division because it results in cells that have half the number of chromosomes as the parent cell.
What is meiosis?Meiosis is an order of cell division in which the chromosome number in the cells reduces upshot in haploid cells. Meiosis is called reduction division because the integer of chromosomes in the daughter cells is half that of the parent cell. · Meiosis and its importance. Meiosis is sometimes called "reduction division" because it reduces the number of chromosomes to half the normal figure, Meiosis is referred to as reduction division because the number of chromosomes in the daughter cells has been lower. Meiosis is called reduction division because of the figure of chromosomes.
So we can conclude that Meiosis is a type of cell division in which the chromosome number in the cells reduces by half that resulted in the production of haploid number of chromosomes.
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if almost every surface we touch is inhabited by bacteria, why don't bacterial infections occur more often?
It is because our immune system fights off bacteria.
In most cases, bacteria and the immune system communicate through proteins on the surfaces of the bacteria that the immune system recognizes.
Additionally, certain bacteria produce chemicals that affect our immune cells, either by altering their composition or function by producing more or fewer immune cells.
A strong immune system can fight against pathogens—or disease-causing microorganisms—invading healthy tissue, including bacteria, viruses, parasites, and cancer cells.
The fight against the COVID-19 pandemic depends on our ability to comprehend how the immune system functions and how we can better safeguard our bodies.
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what part of a nucleotide provides energy to form the sugar-phosphate backbone of dna and rna molecules?
A component of the phosphate backbone known as an ATP, an energy molecule, is used to bind the DNA together.
What are DNA and RNA molecules?
Nucleic acids, which are big molecules consisting of monomers called nucleotides, include DNA and RNA. Genetic information, which the organism uses to produce proteins, is stored in nucleic acids. Despite the many similarities between DNA and RNA, there are a number of significant structural and functional differences between these two molecules.
What is the sugar phosphate backbone of DNA and RNA molecule?
The part of the DNA double helix that gives the molecule's structure support is known as the phosphate backbone. Two strands of DNA form a twisted ladder-like structure by wrapping around one another. Deoxyribose and phosphate groups alternately form the backbone of each strand.
Hence, ATP is the molecule providing energy for the process.
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Please help me!!!
I’ll give you the Brainiest!!!
Sometimes water seeps through the concrete wall of a basement after a heavy rain, and the
homeowner must remove it with a sump pump. How can this situation be compared to the action of
a unicellular organism that lives in a pond?
(Answer in 5-7 sentences)
Explanation:
This is Osmosis. water molecules move from an area of higher water potential to an area of lower water potential across a partially permeable membrane. in a unicellular organism, it's cell surface membrane is often selectively permeable which maintains the water potential within the cell.
this structure of the medulla oblongata relays information from the red nuclei, midbrain, and the cerebral cortex to the cerebellum.
E the hypothalamus. The red nuclei, midbrain, and cerebral cortex communicate with the cerebellum through this medulla oblongata structure.
What sends information from the cerebral cortex to the cerebellum?The lowest portion of the brain, the brainstem, is situated in front of the cerebellum and is attached to the spinal cord. The midbrain, pons, and medulla oblongata are its three constituent parts. It acts as a relay station, transmitting messages back and forth between the cerebral cortex and various bodily regions.
What parts of the medulla transmit impulses to the cerebellum?Pons: Located in the brainstem, the pons joins the thalamus and medulla oblongata. It consists of tracts that transmit impulses from the motor cortex to the medulla, thalamus, and cerebellum.
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what features of dna make it possible to make recombinant dna in the lab? group of answer choices all of these choices are correct. two double helices from different sources can be ligated together.
All organisms have the same genetic code, restriction enzymes can cut DNA from all species, and two double helices can be ligated from different sources.
What parts of DNA make it up?DNA's building units are chemical compounds called nucleotides. These building blocks consist of three elements: one of four possible nitrogen bases, phosphate groups, and sugar groups. The phosphate and sugar groups are alternated when nucleotides are linked together to form chains, which is how DNA strands are built.
How does DNA serve a purpose?Information is stored in DNA. It contains data necessary to produce proteins, which are other big molecules. The 46 lengthy structures known as chromosomes that make up each of your cells house these instructions. Many thousands of smaller DNA pieces, known as genes, make up these chromosomes.
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Activation energy (EA) is defined by the following statement(s).
A. EA is the amount of energy needed for a reaction to occur.
B. EA is lowered by the appropriate enzyme.
C. EA is the same between reactants and products.
D. A and B
E A, B, and C
EA is indeed the amount of energy needed for the a reaction to take place, and the right enzyme lowers EA.
The correct answer is A,B
What is the actual meaning of energy?The definition of energy is the capacity for work. Numerous things contain energy, which can also exist in a variety of forms. Kinetic energy, for instance, is the energy of motion, and potential energy is the energy resulting from the location or structure of an object. Although energy can change forms, it never actually disappears.
Why does energy exist?Energy is a phrase used to describe a property of matter and non-matter fields; it is not a substance in and of itself. For instance, it is argued that matter has kinetic energy when it moves quickly. Potential energy can take many different forms.
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