Answer:
The following statements are true:
The microbe must be present in individuals suffering from the disease and absent from healthy individuals.
If organisms from the pure culture are injected into a healthy experimental animal, the disease symptoms should appear.
The microbe must be isolated and grown in pure culture.
Note: The question is incomplete. The complete question is given below:
Evaluate these statements about Koch's postulates, which are used to establish a causative link between a specific microbe and a specific disease. Which of them are true? Select all that apply.
The microbe must be present in individuals suffering from the disease and absent from healthy individuals.
The microbe does not have to be isolated from the experimental animal as long as the disease is present.
If organisms from the pure culture are injected into a healthy experimental animal, the disease symptoms should appear.
The microbe must be isolated and grown in pure culture.
Explanation:
Robert Koch, a German Physician, in 1884 postulated the following four criteria in order to establish a causative relationship between a microbe and a disease;
The microorganism must be found in abundance in all organisms suffering from the disease, but should not be found in healthy organisms. The microorganism must be isolated from a diseased organism and grown in pure culture. The cultured microorganism should cause disease when introduced into a healthy organism. The microorganism must be reisolated from the inoculated, diseased experimental host and identified as being identical to the original specific causative agent.From the above, the following out of the statements are true:
The microbe must be present in individuals suffering from the disease and absent from healthy individuals.
If organisms from the pure culture are injected into a healthy experimental animal, the disease symptoms should appear.
The microbe must be isolated and grown in pure culture.
does a dicot have vascular bundles in a circle
Answer:
Dicot stems have their vascular bundles in a ring arrangement.
Explanation:
that might answer ur question.... forgive me if im wrong <3
Someone please help i do not know this and i need help with this instantly so if you know this can you help
Answer:
Question 2: Photosynthesis, the sunlight is coverted to natural energy by plants, which is then used for GLUCOSE.
Explanation:
rate this a 5 please, natural prodigy bruh
How do
you think humans can impact the
biosphere by affecting the biogeochemical
cycles?
Answer:
hope this will help u
Explanation:
Biogeochemical Cycles
Human activities have greatly increased carbon dioxide levels in the atmosphere and nitrogen levels in the biosphere. Altered biogeochemical cycles combined with climate change increase the vulnerability of biodiversity, food security, human health, and water quality to a changing climate.
Explore interactions between climate change and biogeochemical cycles.
Answer:
Human activities
moreover, biogeochemical cycles combined with climate change increase the vulnerability of biodiversity, food security, human health, and water quality to a changing climate.
What is evidence that each color of visible light has a wave of a specific wavelength. pls help me :)
Answer:
Dispersion of white light by a prism
Explanation:
When white light is passed through a prism, the white light separates into its component wavelengths which are:
Red
Orange
Yellow
Green
Blue
Indigo
Violet
Together, all of these wavelengths constitute the spectrum of white light.
Hence, the dispersion of white light shows that each color of visible light has a specific wavelength.
O Excretory System 4. The allows us to breathe, digest food, and react to stimuli by regulating the functions of our organs. (10 Points) 0 Immune System O Nervous System O Excretory System O Integumentary System 5. (10 Points)
Answer:
The Nervous System.
Explanation:
The nervous system's job is to help in receiving information about the environment around us and generate responses to that information (a.k.a homeostasis). The nervous system can be divided into regions that are responsible for sensation (sensory functions) and for the response (motor functions).
Hope this helps!
need help with this ??
Answer:
C all areas around the equator
Explanation:
All studys about the area of the earth have proved that area has higher heat values
Which type of rock does B represent?
Group of answer choices
Let's suppose you were interested in developing drugs to prevent epigenetic changes that may contribute to cancer. What cellular proteins would be the target of your drugs?
Answer:
Potential targets:
1- DNA methyltransferases
2- Chromatin modifiers such as histone acetyltransferases, histone deacetylases, histone methyltransferases, etc.
3- Components of the RNA interference (RNAi) machinery such as Dicer, Argonaute, etc.
Explanation:
Epigenetics can be defined as the study of any heritable change in the phenotype that does not involve modifications in the DNA sequence. Epigenetic mechanisms can be classified into three major types: 1-DNA methylation, 2-histone modifications (e.g., acetylation, methylation, phosphorylation, etc), and 3-regulatory non-coding RNAs (e.g., miRNAs, lncRNAs, siRNAs, etc) that modulate target gene expression via the RNA interference pathway. There are different types of proteins that are involved in these complex epigenetic mechanisms, and those cited above represent only some examples that can be used as therapeutic targets.
What happens during cytokinesis?
What is one way the nitrogen and carbon get into the soil?
Answer: Humans changed a lot of things during time and one of those things ended up being the Carbon cycle .. They changed it by burning fossil fuels , which releases Carbon Dioxide into the atmosphere ..The nitrogen cycle however starts with nitrogen gas in the atmosphere then goes through the nitrogen cycle fixing Microorganisims to plants , then animals , decomposers then finally into the soil .
Explanation: Everything goes through a certain process to end up in the soil.
Did this yesterday )
Hope I helped -
Sleepy~
Plz help I’ll mark brainliest
Answer:
A.) Frogs, Birds, Trees
Explanation:
A lake is nonliving, so is rain, and its not D
Select all of the following that describe RNA.
Check all that apply.
nucleotides contain the sugar deoxyribose
always occurs as a double-stranded helix
can be single-stranded
can catalyze chemical reactions
the nitrogenous base thymine is used instead of guanine
the nitrogenous base uracil is used instead of thymine
nucleotides contain the sugar ribose
The statements that describe RNA are ;
Nucleotides contain the sugar ribose ( 7 )Can be single stranded ( 3 )The nitrogenous base uracil is used instead of thymine ( 6 )RNA and DNA are similar in some ways because they are both nucleic acids but the characteristics of RNA that makes it different from DNA is that RNA is mostly single stranded with it Nucleotides containing ribose instead of deoxyribose.
The RNA ( Ribonucleic acid ) nucleotides are composed of certain bases i.e. adenine, guanine, and cytosine also it contains uracil in place of thymine.
Hence we can conclude that the statements that describe RNA are ; Nucleotides contain the sugar ribose, Can be single stranded, The nitrogenous base uracil is used instead of thymine.
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Pls help i dont understand :( Will give Brainliest + 25!!!
Answer:A
Explanation:
Answer:
I believe A would be the answer
Hereditary information is stored inside the?
A. Nucleus,which have ribosomes that contain genes
B. Nucleus, which has DNA that contains water
C. Nucleus,which chromosomes that contain genes
D. Nucleus, which has genes that contain many chromosomes
Please help
the answer is D Nucleus, which has genes that contain many chromosomes
Hereditary information is stored inside the nucleus, which has chromosomes that contain genes.
What is hereditary?"Transmission of character or traits from parent to offspring is called hereditary." What is a nucleus?It is the center of a cell that controls and regulates all the activities in a cell.What are chromosomes?"Chromosomes are thread-like structures located inside the nucleus of animal and plant cells."It is a long DNA molecule.What are genes?"A gene is the basic physical and functional unit of heredity."It is present in chromosomes.
Hence, the correct option is C. Nucleus, which has chromosomes that contain genes.
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Which of the following make up the structure of ATP? *
adenine base, ribose sugar, 1 phosphate
adenine base, ribose sugar, 3 phosphates
adenine base, glucose sugar, 1 phosphate
adenine base, glucose sugar, 3 phosphates
Answer:
b
Explanation:
What does the Krebs cycle use to make NADH?
Answer Options are: CO2, Glucose, or Pyruvate
(Solved... the answer is Pyruvate)
Answer:
Pyruvate
Explanation:
It's a product of glycolysis the prior step.
The Krebs Cycle uses the pyruvate of Glycolysis in order to make NADH. The pyruvate from Glycolysis converts into Acetyl CoA which enters the Krebs cycle to derive NADH. Thus, the correct option for this question is C.
What is the Krebs cycle?The Krebs cycle may be defined as a type of cycle that involves a series of chemical reactions in order to liberate stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins in the form of ATP or NADH.
The process begins with the molecules of glucose which coverts into pyruvate (a molecule of three-carbon). This pyruvate is then transformed into acetyl CoA which has two carbon atoms. This acetyl CoA is then entered into the Krebs cycle in order to deliver the form of an electron which is known as NADH.
Therefore, the Krebs Cycle uses the pyruvate of Glycolysis in order to make NADH. Thus, the correct option for this question is C.
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have this done correctly for brainliest
Answer:
1-Homeostasis
2-Adaptation
3-Evolution
4-Ecosystem
5-System
6-System is a group of objects that work together and ecosystem is a group of living things that work together
7-Structure is what you see/sense and function is what it's job is
8-The organism would over heat and eventually get disease or die
9-This means that all living things have similarities but also have many differences
Explanation:
I hope this helps you ♡
Does corn syrup have more solutes than an egg?
Which of the following organisms are most important in biodegradation
Answer:
2.1.
In the environmental context, generally microorganisms are the most important agents of biodegradation. Although extensive degradation of some xenobiotic chemicals can occur in mammals (usually in the liver), they are not particularly important in degradation of environmental pollutants.
Explanation:
Which represent an organic compound?
Antibodies
Water
Monosaccharides
Proteins
Enzymes
Please help!!
Answer:
PROTEINS
Explanation:
I JUST DID THIS IN MY SCIENCE QUIZ
so glad i could help :O
Answer:
Enzymes
Ex
i jus did it
Two different groups of scientists studying a rare trait in ground squirrels report very different heritabilities. What factors influencing heritability values make it possible for both conclusions to be correct?
Answer:
It is a trait highly influenced by environmental factors (i.e., it has low heritability)
Explanation:
In population genetics, heritability is a statistical measure to estimate the proportion of the phenotype variation of a given trait which can be explained by hereditable genetic factors. The heritability of a trait is influenced by environmental factors, genetic factors (e.g., allele frequencies, number of genes involved in trait variation, recombination rate, etc), and the interaction between genetic and environmental factors. A low heritability value suggests that most of the variation is not genetic (i.e., due to environmental factors), while a high heritability value suggests that almost all of the variability in a trait is due to genetic factors.
Researchers grew populations of identical Escherichia coli (E. coli) bacteria in a growth medium that contained a low concentration of glucose and a high concentration of citrate, a substance that is not typically consumed by E. coli. For thousands of generations, the bacteria used only glucose as an energy source and grew relatively slowly and to a low density because of the low concentration of glucose. After about 30,000 generations, one population emerged that began to rapidly grow to a much higher density. The researchers hypothesized that the bacteria evolved the ability to use citrate as an energy source and referred to them as Cit . To test the hypothesis, the researchers grew separate populations of the Cit bacteria and bacteria from the original population (Cit- ) in a growth medium that contained only citrate. Describe one outcome that would demonstrate that a given population has evolved.
Answer:
The colony of bacteria is called cit positive, or cit in case these advance with colonization in media with citrate, since if they grow in number and proliferate, it means that they use citrate as a metabolite or food resource for their metabolism.
Explanation:
In case these are negative cit, the profileration would have to be null or see that the colony stagnant its growth, that is to say that they did not increase in number or even decrease their number layers and they did not replicate in media with citrate.
The colony of bacteria is named cit positive, or cit just in case these advance with colonization in media with citrate.
Since if they grow in number and proliferate, it means they use citrate as a metabolite or food resource for metabolism.
In case these are negative cit, the proliferation would have to be null or see that the colony stagnant its growth, that is to say, that they did not increase in number or maybe decrease their number layers and that they didn't replicate in media with citrate.
What about E.coli?
E. coli, a species of bacteria that lives harmlessly in every person’s gut by the billions. A typical E. coli contains about 4,000 genes (we have about 20,000). Feeding on sugar, the microbe grows till it's able to split in two.
It makes two copies of its genome, nearly always managing to supply perfect copies of the first. The single microbe splits in two, and every new E. coli receives one of the identical genomes. These two bacteria are, in other words, clones.
Therefore, E.coli grows in presence of citrate that evolved in the population of 30,000 generations.
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True or False:
The first step in glycogen synthesis is the phosphorylation of glucose.
Answer:
The correct answer is True
Explanation:
The first step in glycogen synthesis (glycogenesis) is the phosphorylation of glucose to form glucose-6-phosphate, which is catalyzed by hexokinase. [This step is also the first step in the glycolytic pathway]. Glucose-6-phosphate is then isomerized to glucose-1-phosphate by the action of phosphoglucomutase. This glucose-i-phosphate is then converted to glycogen by glycogen synthase.
Sea turtles spend most of their lives at sea feeding on jellyfish. When it is time to lay their eggs, mature females come ashore. They dig
nests in the sand along the coast, lay their eggs, and then return to the sea. The data below show the changing sea levels since the late
1800s.
Answer:
this is not a very clear question T-T
Explanation:
wish i could help
Answer:
Explanation:
Afterwards, only females come ashore to nest; males almost never return to land ... Most females return faithfully to the same beach each time they are ready to nest. ... When the turtle has finished digging the egg chamber, she begins to lay eggs. ... Well over 90% of a sea turtle's life is spent in the water – feeding, mating, ...
What is another name for cool air?
A Thick air
B Thin air
C Dry air
D Wet air
Answer:
probably B
Explanation:
HURRY Design a bacterium that will be genetically engineered. Describe what it will do and how it helps the environment.
Answer:
here
Explanation:
since is man made it's obviously someway going to help.the environment like for example it could help prevent sickness
Answer: Bacterial cells can be genetically modified so that they have the gene for producing human insulin. As these modified bacteria grow, they produce human insulin. This protein can be purified and supplied to diabetics.
Explanation: just had this question.
PLEASE HELP IMMEDIATELY!! Will mark as brainliest
Answer: All you have to do is color grey-likel, BOOM! Osmosis, your teacher will never know.
Explanation:
In the given diagram the process that is carried out is known as osmosis. In the represented diagram the main event that takes place is the process of osmosis.
What is osmosis?
Osmosis has the process in which molecules of the solvent pass via a semipermeable membrane from a lower concentrations to higher concentration or from less concentrated solution to high concentrated solution.
In the process of osmosis movement of water takes place.There are mainly three types of osmosis and these are hypertonic, hypotonic, and isotonic. The process of osmosis is passive transport as water moves from low solute concentration to high solute concentration.
Osmosis has also known as diffusion of water or solvent via a membrane which allows only selective substance to go across the channel. The process of osmosis does not require ATP because it is a passive process.There are mainly three types of osmosis and these are hypertonic, hypotonic, and isotonic.
Therefore, In the given diagram the process that is carried out is known as osmosis.In the represented diagram the main event that takes place is the process of osmosis.
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what are the chamber of human heart
Answer:
atrium,ventricle,lungs,pulmonary
Explanation:
Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.
5
What is the main idea of this text?
A
No two human microbiomes are the same.
B
The human body is a diverse ecosystem made up of microbes.
C
Some bacteria cause infections and even life-threatening diseases.
D Some scientists think that infants who lack exposure to microorganisms
develop a higher rate of allergies.
Answer:
What is the text?......
1. What is the total amount of carbon removed from the atmosphere each year by the ocean and land plants?
2. What is the total amount of carbon added to the atmosphere from soil and the burning of fossil fuels?
3. How much will atmospheric carbon change in one year?
*From the Carbon Cycle Gizmo
Answer:
Carbon is the chemical backbone of life on Earth. Carbon compounds regulate the Earth’s temperature, make up the food that sustains us, and provide energy that fuels our global economy.
The carbon cycle.
Most of Earth’s carbon is stored in rocks and sediments. The rest is located in the ocean, atmosphere, and in living organisms. These are the reservoirs through which carbon cycles.
Explanation:
From the Carbon cycle the answers to your questions are ;
1) The Total amount of carbon removed from the atmosphere each year is
65 GTC2) The Total amount of carbon added from soil and burning of fossil fuels is
69 GTC3) The Change in atmospheric Carbon in a year = 4 GTC
The amount of Carbon present in the atmosphere within a given period is determined by the amount of carbon added to the atmosphere and the amount of carbon that leaves the atmosphere within a given period.
1) Total amount of carbon removed from the atmosphere = amount of carbon removed by oceans + amount of carbon removed by plants
= 2 GTC + 63 GTC = 65 GTC
2) Total amount of carbon added to the atmosphere from soil and burning fossil fuels = 9 GTC + 60 GTC = 69 GTC
3) The change in atmospheric carbon in a year
= amount of carbon added - amount of carbon removed
= 69 GTC - 65 GTC = 4 GTC.
Hence we can conclude that the amount of carbon added = 69 GTC, amount of carbon removed = 65 GTC and the change in atmospheric carbon is 4 GTC.
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