c. if you begin with one tube of e. coli, how many different types of bacteria do you expect to see in the 4th quadrant?
Answers
If we begin with one tube of E. coli, we will only see one type of bacteria in the 4th quadrant, if any type of contamination does not occur.
To observe the colonies of a bacteria in form of quadrants, we need to follow the below-mentioned steps:
To culture bacteria, we need to transfer it to a petri dish.A petri dish is coated with a layer of agar, a jelly-like substance obtained from red algae that helps in culturing bacteria.Then the required bacteria, which is E. coli in our case is collected using a sterile rod and put on the petri dish.After that, the petri dish is heated to increase the growth of bacteria and also to ensure equitable distribution of bacteria in all four quadrants.After following the above-mentioned steps we have to cover the petri dish to avoid contamination and leave it undisturbed for a few days.When we observe the dish after a few days, we will see the bacterial colonies growing in it, as shown in the adjoining image.Thus, if we begin with one tube of E. coli, we will only see one type of bacteria in the 4th quadrant, if any type of contamination does not occur.
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Related Questions
Explain the role of lipids, carbohydrates, and proteins in the cell membrane.
Ready? Enter your answer here.
III
Answers
Lipids provide structure - allow the selective diffusion. Proteins provide structure - involved transport - involved in cell adhesion. Carbohydrates are involved in cell recognition - receptor complexes.
What is the function of lipids, carbohydrates, and proteins in the cell membrane?The cell membrane is composed of a lipidic bilayer, cholesterol, proteins, and glucans incrusted in between.
⇒ Lipids
Phospholipids are amphipathic molecules.They have hydrophilic heads facing the exterior and the interior of the cells and hydrophobic tails that arrange against each other in the interlayer space.Lipids can easily change places with other lipids by lateral diffusion and transversal diffusion. Their function is to provide structure to the membrane and allow the diffusion of some selected small molecules.⇒ Cholesterol
These lipidic molecules play a significant role in membrane formation and structure. They are embedded in the membrane in between phospholipidic tails.
⇒ Carbohydrates
Carbohydrates are significant energy store molecules.
Carbohydrates get attached to lipids and proteins on the outer side of the membrane (glycolipids and glycoproteins).
Complexes protein-carbohydrate are used to identify and differentiate the cell and work as receptors.
Carbohydrates are also involved in cell adhesion.
⇒ Proteins
Among the proteins, we can find integral proteins and peripheric proteins.Integral proteins are permanently associated with the membrane. They accomplish many different functions such as substances transport, cellular receptors, and cellular adhesion, among others.
According to how they are incrusted in the lipidic bilayer, integral proteins might be,
→ Transmembrane proteins ⇒ they cross the two lipid layers of the cell membrane.
→ Monotypic integral proteins ⇒ they can be found tied to one of the lipidic layers.
Integral proteins provide structure to the plasmatic membrane.
Periferic proteins are in the internal or external surface but not incrusted in the membrane.
In conlusion,
Phospholipids are the basic elements of the cell membrane. They are arranged in two layers, and thanks to their motion properties, they allow passive transport (diffusion) of some substances.Proteins provide structure, are involved in facilitated and active transport, and are involved in cell adhesion. Carbohydrates are involved in cell recognition and in receptor complexes.You can learn more about membrane composition at
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Polaris is one of the brightest stars in the sky and is the brightest star in the constellation Ursa Minor. It is very close to the northern celestial pole, and Polaris is often referred to as the Northern Star. Polaris is estimated to be approximately 46 times larger than the Sun. Why does Polaris appear to be so much smaller than the Sun to the human eye?
A) The Sun is a brigher star than Polaris.
B) The distance from Earth to Polaris is much greater than from Earth to the Sun.
C) The Sun is actually made of many different stars, giving it the appearance of being big.
D) The light from the Sun is spread out in our atmosphere, giving it the appearance of being large.
Answers
Answer:
B.
Explanation:
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Answer:
b
Explanation:
28 points and brainliest hurry!!
The movement of plates at a divergent boundary-
O Move up and down
O Move away from each other
O Move towards each other
O Form mountains
Answers
Answer:
They move away from eachother.
Explanation:
Took the test
As a responsible citizen and future taxpayer, what concerns would you have about switching from a traditional fossil fuel-based to a biomass-based energy source for your community? Think about environmental, economic, and societal concerns.
ILL GIVE BRAINLIEST
Answers
2 for 1!!! PLEASE HELP
The nucleotide not found in RNA is:
Adenine
Thymine
Guanine
Cytosine
Uracil
---------------------------------------------------
The five carbon sugar found in DNA is:
Deoxyribose
Ribose
Glucose
Fructose
Answers
Answer:
RNA: Thymine, DNA: Deoxyribose
Explanation:
Hope this helps:)
why are some ions known as polyatomic ions?
Answers
Answer:
because a polyatomic ion is just a regular ion except it contains more then one atom
Explanation:
Small membrane-bound sacs that move products into, out of, and within a cell are called __.
Answers
Answer:
A vesicle is a small, membrane-bound sac that transports substances in cells. The ER moves proteins and other substances within eukaryotic cells.
Explanation:
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The number of individual organisms present in a given population at a given time is.
Answers
Answer:
7th Science Honors Ch. 4 Vocab
A B
population size: the number of individual organisms present in a population at any given time
population density: the number of individuals in a population per unit of area
population distribution: how organisms are arranged within an area; sometimes called population dispersion.
Explanation:
What are some of the criteria a pharmaceutical company would want to meet if it is producing a drug for sale to consumers
Answers
Answer:
Fundamento: La industria farmacéutica a nivel internacional tiene entre sus estrategias la propaganda de medicamentos directa al consumidor, para incrementar sus ganancias.
Objetivo: Valorar cómo puede influir la promoción inadecuada en el uso racional de medicamentos y como se presenta en Cuba.
Metodología: Se realizó una búsqueda de información, en fuentes primarias y secundarias, sobre promoción y uso no adecuado de los medicamentos.
Resultados: Se encontró que la propaganda realizada de manera directa al consumidor genera un aumento de las ventas de los productos anunciados, lo cual hace de la promoción una herramienta esencial de marketing para la industria farmacéutica internacional, situación que no es uniforme, sino que varía de un país a otro con un denominador común: las anomalías mayores presentes en los países en desarrollo. La Organización Mundial de la Salud en 1988 publicó los “Criterios éticos para la promoción de medicamentos”, los cuales sirven de base para elaborar regulaciones sanitarias por parte de las autoridades nacionales de salud que permitan garantizar la calidad, seguridad y eficacia de los medicamentos.
Conclusiones. El trabajo conjunto entre autoridades sanitarias, profesionales de la salud y pacientes permitirá lograr un uso adecuado de los medicamentos sin el sesgo que conllevan los mensajes promocionales.
Palabras clave: Industria farmacéutica y ética; ética farmacéutica; control de la publicidad de productos¸ publicidad de medicamentos; tecnología farmacéutica y ética; preparaciones farmacéuticas; medicamentos sin prescripción.
DeCS: INDUSTRIA FARMACÉUTICA/ética; ÉTICA FARMACÉUTICA; CONTROL DE LA PUBLICIDAD DE PRODUCTOS; TECNOLOGÍA FARMACÉUTICA/ética; PREPARACIONES FARMACÉUTICAS.
Explanation:
Change in gene pool caused by movement of organisms into (increase genetic variation) or out of (decrease genetic variation) the population
Answers
Answer:
A
Explanation:
i got it right
A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle. True or false?.
Answers
Answer: A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle
f a rabbit breeder crossed a white rabbit and a black rabbit in a complete dominance pattern, then all of the offspring would be either white or black in color. If the rabbits showed a pattern of incomplete dominance, breeding a white rabbit and a black rabbit together would produce all gray rabbits. Lastly, if the rabbits showed a pattern of codominance, then breeding a white rabbit and a black rabbit would produce rabbits with black and white spots. Using your knowledge of inheritance, explain how the genotypes produce different phenotypes in each inheritance pattern.
Answers
Answer:
- Complete dominance: one allele masks the expression of the other gene variant or the phenotype is caused by the absence of gene function when both alleles are recessive.
- Incomplete dominance (codominance): both alleles are expressed and contribute to the phenotype
Explanation:
Complete dominance is a type of dominance by which one allele (dominant allele) completely masks the effects of another allele (recessive allele) in heterozygous individuals (i.e., individuals carrying two different gene variants or alleles). On the other hand, codominance refers to a type of incomplete dominance where both alleles in the genotype are observed in the phenotype. Complete dominance is caused when the recessive allele is not expressed, while if both alleles are expressed it is called incomplete dominance.
Trees that grow in a forest tend to grow very tall, with few branches. The same species of tree grown in an open area tends to grow shorter and wider, with many branches. The stimulus responsible for these different growth patterns is the amount of
wind striking the tree
⊝
light reaching the tree
⊝
nutrients in the soil
⊝
water in the ground
⊝
Which one is it?
Answers
Answer:
The correct answer is A) light reaching the tree
Explanation:
In a forest, there are lots of trees and they are all competing for sunlight so they are forced to focus all their energy on growing taller so they don't get stuck in the shadow of another tree, however, the trees that grow in a large, open area have little to no competition for sunlight, so they can relax and spread out their branches because there's lots of room.
Light, water, and nutrients play a crucial role in the adaptation and evolution of species. The trees of the same species will be taller in the forests, whereas in the open grasslands the height of the trees will be short.
The correct answer is:
Option B. Light reaching the trees
The light plays a crucial role in the height of trees as:
1. Light is essential for the survival of trees. In a forest, a large number of organisms are present, which fight for shelter, food, and light. Thus, to achieve more light, trees are taller.
2. In open grasslands, the trees are shorter and wider, because they do not have neighboring trees that fight for light and water.
Thus, the correct answer is Option B.
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Two Questions! Will give brainliest!
What does the law of superposition tell about the relative ages of rocks?
That the deeper you go into rock layers, the older the rocks are
that the deeper you go into rock layers, the younger the rocks are
that the oldest rock layer is always on top
that the oldest rock layer is always undisturbed
•
After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap, in the geologic record?
An earthquake or motion along a fault
new sediment deposits build up on the eroded area
radioactive decay along a fault
avolcanic eruption near the eroded area
Answers
Anaerobic and aerobic cellular respiration are both biological processes that result in the production ATP molecules. Which of the following best compares anaerobic and aerobic cellular respiration?
a Aerobic respiration occurs in the cytoplasm and anaerobic takes place in the mitochondria.
b Aerobic respiration only occurs in muscle cells and anaerobic occurs in blood cells.
c Aerobic respiration produces alcohol and anaerobic respiration produces lactic acid.
d Aerobic respiration uses oxygen and anaerobic respiration does not.
Answers
Answer:
the answer would be D.
Explanation:
Anaerobic respiration and aerobic respiration produce ATP. Aerobic respiration uses oxygen. In anaerobic respiration oxygen is not used. Option d is the correct answer.
What is cellular respiration?Cellular respiration is a process in which a cell uses oxygen and carries out different cellular processes. In this process, energy is produced. There are two types of cellular respiration, such as aerobic respiration and anaerobic respiration.
In anaerobic respiration, oxygen is not used. An example is glycolysis. Glycolysis takes place in the cell cytoplasm. 2 ATP is released by this process.
In aerobic respiration, oxygen is used. Example: In the presence of oxygen, the pyruvate enters the Krebs cycle and the electron transport chain. This process takes place in the mitochondria.
In this aerobic process, the maximum amount of ATP is released. In aerobic respiration, the complete oxidation of glucose takes place , but in anaerobic respiration, complete oxidation does not take place.
Hence, option d is the correct answer. Aerobic respiration uses oxygen. Anaerobic respiration does not use it.
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How many days is 0.79
Answers
Answer:
0.79 = ? 0.79% if a year = 288.35 days =288 days 8 hours and 24 minutes
Are gender traits completely a result of societal expectations? Justify your answer.
Answers
Answer:
No. Gender traits in humans are largely determined by biophysical processes.
Explanation:
There seems to be a vocal political faction that is trying to convince people in the name of liberty and equality that gender traits are completely learned, and therefore arbitrary. But this claim disagrees with scientific evidence. In general, boys play more with cars and girls play more with dolls not because their parents are perpetuating outdated gender stereotypes, but because their brain is telling them to. This fact does not mean that boys have to play with boy toys, or that boys who play with dolls aren't really boys. It is just a scientific observation about average behavior and its link to fetal development.
Transmembrane proteins assist passive transport of substances that cannot cross the lipid bilayer on their own down their concentration gradient. True or false?.
Answers
It is true that transmembrane proteins assist passive transport of substances that cannot cross the lipid bilayer on their own down their concentration gradient
The passive movement of molecules over a concentration gradient is referred to as facilitated diffusion. It is a selective mechanism in which only certain molecules and ions may flow through the membrane. Other molecules, however, are prevented from flowing through the membrane. The electric charge and pH both aid in membrane diffusion. The plasma membrane regulates the passage of chemicals into and out of the cell by being selectively permeable. This is accomplished by the active or passive transport of chemicals. It is required for the transport of vital substances like as glucose, proteins, minerals, and gases. Temperature, concentration, diffusion distance, and molecule size all influence facilitated diffusion.
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The genetic information that moves from the nucleus to the cytoplasm of a cell during protein synthesis is called.
Answers
This happens when water vapor rises, cools off then gets closer together and forms clouds.
HELLLPPP
Answers
Answer:
Condensation....I think
Answer:
I would believe the answer is condensation. sorry if it's wrong, I haven't taken this course in a long time. <333
Why are sex linked disorders most often seen in males
Answers
Which statement best describes an environmental consequence of sustainable v
O Incinerators release fewer emissions into the atmosphere.
O Transporting waste to other countries saves land for housing.
O Ecosystems are saved when less land is used for landfills.
Sealed landfills can be capped for methane gas use.
Answers
Transporting waste to other countries saves land for housing statement best describes an environmental consequence of sustainable waste management.
Sustainable waste management strives to reduce the quantity of solid waste that's also disposed of in landfills or by incineration. Materials are kept in use for as long as feasible.
In addition to promoting a healthy natural environment that benefits both people and animals, sustainable waste management is essential to releasing precious land from landfills, enhancing energy production, creating jobs, and lowering the price of logistics and transportation.
Not only would reducing trash benefit the environment, but it will also save money or lower disposal costs.
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A scientist goes on an expedition to Greenland and finds an unknown organism. She then analyzes the DNA and confirms that the strand she has contains 1000 total nitrogenous bases. She continues to analyze it further and realizes the strand has 200 adenines. She needs to determine how many cytosines exist in that sample.
Answers
Answer:
800
Explanation:
1000-200
As concentration of substrate is increased in a reaction catalyzed by an enzyme, the reaction rate will stop increasing once saturation is reached because.
Answers
As concentration of substrate is increased in a reaction catalyzed by an enzyme, the reaction rate will stop increasing once saturation is reached because all enzymes are actively engaged in a reaction.
In the field of science, enzymes can be described as biological catalysts that speed up a reaction.
An enzyme is specific for its activity as a specific substrate fits into the active site of the enzyme. When the concentration of a substrate is increased, the rate of reaction will also increase until saturation is achieved. This will be the point where there will be no more free active sites of enzymes left for substrates. Each enzyme will already be having a substrate at this point.
In order to further increase the reaction rate, the quantity of the enzyme should also be increased so that there are more active sites present for substrates.
Although a part of your question is missing, you might be referring to this question:
As concentration of substrate is increased in a reaction catalyzed by an enzyme, the reaction rate will stop increasing once saturation is reached because
A. There are too many enzymes available and not enough substrate
B. once the enzyme reacts once, they cannot react again
C. all enzymes are already engaged in a reaction
D. increasing substrate inhibits enzyme activity
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Help pls. I will give brainliest.
A plant has a genetic defect that causes its leaves to dry out, becoming brittle and prone to injuries. The genetic defect most likely causes each leaf to lack a _______
It's either cuticle or sufficient root
Answers
Answer:
Sufficient root!Explanation:
took it last year
Answer:
Sufficient root.
Brian is a detective who arrives at the crime scene before anyone else. What is TRUE about Brian
Answers
Answer:
He is prepared to get on the case early that way the evidence is still fresh
And no one has touched it
Explanation:
Answer:
He is Known as the First Responder to the Scene
Explanation:
he is the first person to arrive
what are things Animal Cells have Only
Answers
Answer:
Animal cells have centrosomes (or a pair of centrioles), and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.
Explanation:
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genomics can be used to study the genetic relationships among species. why might genomics be important for evolution research? explain.
Answers
The study of genomics can prove the theory of evolution. So, genomics is important for evolution research.
What is genomics?
The set of DNA of an organism is called its genome. There are 3 billion base pairs of DNA and virtually, every single cell in the body will have a complete copy of the letters, or codes that compose the human genome.
DNA has all the required information to build the entire human body. A unit of DNA carrying the instructions for the formation of a specific protein or a set of proteins is referred to as a gene. Every one of the 20,000 to 25,000 estimated genes in the human genome codes for an average of three proteins. Genomics is the study of genomes.
Therefore, the study of genomics can prove the theory of evolution. So, genomics is important for evolution research.
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What had happened with the HeLa cells that made the Johns Hopkins researchers want to take blood and tissue samples from the Lacks family?
plzz real answers only
Answers
Answer:
HeLa cells contain rare traits that make them invaluable to scientific research. Research into the Lacks family may provide insight into this mutation and cell proliferation.
Explanation:
HeLa cells have a controversial origin, rooted in ethical breaches. They were derived from a non-consenting, female African-American donor patient, Henrietta Lacks who was terminally ill with a form of cervical cancer. These particular cells have a remarkably short period of proliferation, due to their active telomerase.
During cell division, these telomoerases were found to make repeat copies of the cell's telomere, and the cells can divide an unlimited number of times in lab cell cultures- a very rare occurrence. They were later commercialized- HeLa cells are durable, robust and commonly used in cancer cell research.
The total amount of living tissue within given topics level is called
Answers
Answer: The answer is "biomass".
Explanation: yes