Answers
Related Questions
You are preparing a 4-tube series of a 5-fold serial dilution. If Tube #1 contains 500 µL of undiluted stock solution, then what volume will be
transferred from Tube #1 to Tube # 2 to Tube # 3 to Tube #4?
O 500 μL
O 400 μL
O 250 μL
O 100 μL
Answers
The volume will be transferred from Tube #1 to Tube # 2 to Tube # 3 to Tube #4 is 500 μL.
What is serial dilution?
In order to produce an incubated plate with a readily countable number of colonies, serial dilution is employed in microbiology to measure the concentration or number of cells/organisms in a sample. To get the appropriate concentration of reagents and chemicals from a greater concentration, serial dilution is employed in biochemistry.
The concentration of an organism, in this case bacteria, is systematically lowered through successive resuspension in predetermined amounts of liquid diluent through the technique of serial dilution. Usually, the diluent's volume is a multiple of 10 to aid in the sample organism's logarithmic reduction.
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Correctly label the diagram of the cell with the parts of transcription and translation. Submit your response as a numbered list
1
2
3
4
5
Answers
Answer:
jlkjkllkj;
Explanation:
lkjnkjlnmklhbkjbjkhb
Tyrel is hiking with his sister when they begin noticing that a lot of the trees around them look unhealthy. The leaves have large holes in them, as though something has been eating through them. After about a mile more of walking, both Tyrel and his sister realize that the only trees looking unhealthy with their leaves eaten through are oak trees. What is causing this?
A. a fungus
B. ash borer beetles
C. gypsy moths
D. a biopesticide
Answers
The reason for the eating of the leaves of the trees is the gypsy moths.
What are leaves?The leaves are the photosynthetic parts of the plant. The leaves are exposed to the sun and are able to produce the food that is required by the plant. Thus, the food of the plant could only be produced at the leaves and a damage to the structure of the leave by pests would certainly have an effect on the whole plant.
The gypsy moths are known to eat the leaves of trees. We can see here that in many places, the leaves of trees could be eaten by the gypsy moths.
As such, the reason for the eating of the leaves of the trees is the gypsy moths.
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Please help with both fill in blank for number 7.
First Fill in Blank options:
-M20
-E38
-W0
Second Fill in Blank options:
-increase
-decrease
-rate did not change
Answers
5. By examining only the chemical formula of a molecule, how would you know you were looking at a carbohydrate?
Answers
Answer: Has a ratio formula of (CH2O)n
Explanation:
Glucose: C6H12O6
Ribose: C5H10O5
2.Which of the following sequences is in the correct order to know the steps involved to test the
presence of starch in a leaf?
P - Boil the leaf in alcohol in a water bath.
Q - Add iodine solution.
R - Wash the leaf in water.
S - Boil the leaf in water.
(a) S, Q, R and P (b) P, S, Q and R
(c) Q, R, P and S (d) S, P, R and Q
Answers
Answer: c
Explanation:
The classification system for organisms has changed from seven levels to eight. This happened because
scientific consensus changed as scientists learned more about organisms.
scientists did not test the seven-level system often enough to lead to consensus.
the eight-level system of classification is an emerging idea that needs more testing.
the seven-level system of classification was not supported by scientists.
Answers
There are now eight levels in the organism classification scheme as opposed to the previous seven. The reason for this is because: as scientists learnt more about organisms, the scientific consensus shifted.
The seven-level scheme was not put to the test by scientists frequently enough to produce agreement.
The eight-level classification system is a new concept that requires more research. Scientists did not agree with the classification scheme of seven levels.
The seven categorization systems were organised by Carolus Linnaeus. The Linnaean classification system uses a hierarchy of groupings called taxa. The eight Levels of the Classification System were proposed by Thomas Cavalier-Smith.
The Classification System's Levels:
The eight tiers of the organism classification hierarchy are as follows:
domain, kingdom, phylum, class, order, Family, genus, species
The classification criteria:
The following standards apply to the levels of the organism categorization system:
cell structure complexity, body arrangement, manner of nourishment, way of life, and phylogenetic relationship.
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A. Scientific consensus changed as scientists learned more about organisms.
When graphing data, the variable the should be plotted on the x-axis is the...
Answers
Answer:
Independent Variable
Explanation:
the dependent variable goes on the y-axis while the independent variable goes on the x-axis
Identify the axis of the graph below for the rate of enzyme action.
Rate of Enzyme Action
Rate of Enzyme Actio
Rate of Enzyme Act
the x-axis (dependent variable)
Rate of Enzyme Action is the x-axis (independent variable)
Answers
Answer:
Explanation:
X-axis represent temperature and Y-axis represent enzyme activity. All enxymes act at an optimum temperature, above and below this temperature the enzyme activity declines
If you moved to Saturn.
What would you take with you?
Answers
Answer:
My BEST FRIEND my dogs and my family and all my things or if it was possible my house with everything in it
Explanation:
Answer:
my phone
Explanation:
because i have to snap alot of pictures and make some videos
it'll be great experience.
which Empire did Alexander not rule.
Answers
Answer:Greece
Explanation:
Climate change may be harm for us justify?
Answers
Climate change may be harm for us because Droughts that are more frequent and intense, storms, heat waves, rising sea levels, melting glaciers, and warming oceans can directly harm animals, destroy their habitats, and disrupt people's livelihoods and communities.
The effects of climate change on various sectors of society are interconnected. Drought can have a negative impact on both food production and human health. Flooding can lead to disease spread and damages to ecosystems and infrastructure. Human health issues have the potential to increase mortality, reduce food availability, and reduce worker productivity.
According to the World Health Organization, climate change is the greatest health threat facing humanity, threatening the progress made in development, global health, and poverty reduction over the last 50 years.
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4. Explain how ecological pyramids help analyze energy flow through trophic levels
a.
5. Explain how matter flows between trophic levels and among ecosystems
a.
6. Explain how water cycles globally
a.
7. Identify the importance of the nutrient cycles
a.
8. Explain how nutrient availability affects primary productivity
Answers
The ecological pyramids help us analyze energy flow through trophic levels because it provides information about organism and its population.
How ecological pyramids help analyze energy flow through trophic levels?Ecological pyramids help to analyze energy flow through trophic levels because it has a brief explanation about the type of organism in each trophic level. It also gives information about feeding behaviour and population of organisms in it.
Explain how matter flows between trophic levels and among ecosystems?Matter flows between trophic levels and among ecosystems through feeding of one organism to another.
Explain how water cycles globally?Liquid water evaporates in the form of water vapor. This water vapor condenses to form clouds and falls back to the earth in the form of rain and snow.
Identify the importance of the nutrient cycles?The importance of the nutrient cycles is storage of elements, which is important because some organisms require a small quantity of a particular nutrient in order to survive.
Explain how nutrient availability affects primary productivity?If sufficient sunlight and water are available to the producers, then the primary productivity increases in that ecosystem. We know that the primary productivity of an ecosystem is limited and controlled by the availability of nutrients.
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Fill in the blank
The graph indicates that the mean of the treatment is _____ than the mean of the placebo
Answers
The graph indicates that the mean of the treatment is Smaller than the mean of the placebo
The graph shows that the treatment's mean is lower than the placebo's mean.
The following graphs display several data sets that illustrate how medication affects how quickly you recover. Each graph with a statistically significant distinction between the placebo and the experiment should be clicked.
Thomas T. Harman and Walter Showell's Birmingham Dictionary is available online.
Thus, it will become clear that the typical church organ is actually a combination of three or four lesser organs.
ORGAN BUILDING'S RECENT REVOLUTIONGEORGE LAING MILLER
He means that I should assist him by keeping in mind and by making more modest requests of him.
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why the electron carrier NADH is used exclusively in the production of ATP whereas it phosphorylated form (NADPH) is used in anabolism
Answers
According to the research, the correct answer is the electron carrier NADH is used exclusively in the production of ATP because they are electron-donor molecules that lead to the synthesis of ATP, whereas it phosphorylated form (NADPH) is used in anabolism to generate larger molecules or macromolecules.
What is NADH?It is the molecule made up of two nucleotides, one adenine and the other nicotinamide, which can be in oxidized or reduced form, acting as an exchanger of reducing power in metabolism.
In this sense, anabolic pathways use chemical energy in the form of ATP and NADPH obtained by reducing NADP+ by accepting electrons from water, a donor that is oxidized to synthesize cellular components from simpler molecules obtained in different ways by different types of cells.
Therefore, we can conclude that according to the research, the correct answer is the electron carrier NADH is used exclusively in the production of ATP because they are electron-donor molecules that lead to the synthesis of ATP, whereas it phosphorylated form (NADPH) is used in anabolism to generate larger molecules or macromolecules.
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How could the racial background and perspective of a psychologist who is conducting a research subject influence the field of personality psychology?
Answers
Racial origins and the perspective of a psychologist who is conducting a research subject cannot influence the field of personality psychology, because personality psychology is a branch of psychology that examines personality and its variation among individuals. It aims to show how people are individually different due to psychological forces. His areas of focus include: building a coherent image of the individual and his/her main psychological processes.
What is personality psychology?Personality Psychology is the area that studies and seeks to explain the human particularities that influence behavior.Personality psychology or differential psychology is the part of psychology that is dedicated to describing and explaining "the enduring, non-pathological human particularities that influence behavior within a given population".
With this information, we can conclude that Racial origins and the perspective of a psychologist who is conducting a research subject cannot influence the field of personality psychology
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The humerus articulates with what 2 other bones at the elbow? (spelling counts!)
Answers
Answer:
It articulates with the radius and ulna bones of the forearm to form the elbow joint.
Explanation:
What’s the answer?????
Answers
Earth Science: Q9. What does each letter in the diagram below represent?
Answers
The Earth is composed of three main layers: the crust, the mantle and the core. A) Inner core, B) Outer core, C) Mesosphere, D) Lithosphere, E) Astenosphere, F) Oceanic crust, G) Continental crust, H) Litosphere, I) Outer mantle, J) Astenosphere.
What are the layers of the Earth?Three main layers compose the Earth.
The crustThis is the most external layer.
It is located right upon the mantle and is divided into many plates, that move over it.
It is composed of the oceanic basaltic plate (6-12 km) and the uppermost continental granitic plate (25-70 km).
The mantleThis is the second layer that composes the Earth.
It is a very hot and dense rock that is capable of flowing.
Convection currents occur in this layer, rising hot melted material from the deepest region and sinking cold solid material from the surface.
Three layers compose the mantle,
• Upper mantle (40-400km)
• Transition zone (400-670km)
• Inner mantle (2285 km)
The coreThis is the third layer and is divided into two sublayers,
- the solid inner core (1216 km)
- the liquid outer core (2270 km)
The core is mainly composed of Ferrum and nickel, and its temperature is about 6000ºC.
The extremely high temperatures are closely involved in material circulation, keeping the Earth's surface temperature, and electromagnetic field.
• The core composes the Endosphere
• The Internal mantle composes the Mesosphere
• The Transition zone and superior mantle compose the Astenosphere
• The Crust composes the Lithosphere
In the attaches filed you will find the correct names of each layer.
A) Inner core
B) Outer core
C) Mesosphere
D) Lithosphere
E) Astenosphere
F) Oceanic crust
G) Continental crust
H) Litosphere
I) Outer mantle
J) Astenosphere
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What is the Silk Road? When did the Silk Road originate? How many countries are connected?
Answers
Answer:
The Silk Road, often referred to simply as the Silk Road, originated from a five-volume atlas published in 1877 by the German imperial geographer Baron Ferdinand von Richthofen. The Silk Road refers to the land passage starting from Chang'an or Luoyang, passing through Gansu and Xinjiang, to Central Asia, West Asia, Europe, and connecting the Mediterranean countries. At first, the Silk Road was opened by Zhang Qian's mission to the Western Regions in the Western Han Dynasty. It started from Chang'an and reached the farthest land trade route to the countries of West Asia. In the Eastern Han Dynasty, Banchao's mission to the Western Regions opened up the long-abandoned Silk Road. The east end of the route extends to Luoyang, the capital of the Eastern Han Dynasty, and the west end extends to Europe (Rome), which is the current complete Silk Road route. This road is also known as the "Overland Silk Road" to distinguish the other two future traffic routes under the name "Silk Road". Because silk products have the greatest influence on the goods transported westward by this road, it got this name. Its basic trend is set in the Han Dynasty, including three routes of South Road, Middle Road and North Road. But in fact, the Silk Road is not a "road", but an unmarked road network through mountains and deserts, and silk is only one kind of goods.
Explanation:
What specific pieces of evidence support the endosymbiotic theory in regard to the origins of eukaryotic organisms that can undergo photosynthesis?
Answers
If I’m running a marathon characteristics of life would I need to survive
Answers
Along with smart training methods, intuition is the best tool a runner can have for preventing injury.
I have ten plots of plant of tomatoes. 5 plots have two earthworms. I wet the plants each day for four months. In this experiment, the number of earthworms in the soil is the _________ variable and the number of tomatoes on the plants after three months is the _________ variable
Answers
Answer:
independent; dependent
Explanation:
The independent variable is the one the experimenter controls. The dependent variable is the variable that changes in response to the independent variable.
Question 9 (1 point)
What was the contribution of Henry Goddard to forensic science?
He was the first westerner-to perform an autopsy.
He invented the comparison microscope.
He refined the process of comparing bullets to make ballistic comparisons.
He wrote the first book on questioned document examination to determine
forgeries.
Answers
1. He was the first westerner-to perform an autopsy.
Autopsy- An autopsy, sometimes referred to as a post-mortem examination, is a specialized surgical procedure used to determine the manner and cause of death. The term "cause of death" refers to the medical diagnosis for such reason a patient passed away.
The three subcategories of autopsies are anatomical or academic autopsies, clinical or pathological autopsies, and medico-legal autopsies..
For such benefit the patient families, our staff, as well as the future practice of medicine, an autopsy serves two purposes:
1) To fully examine the prevalence as well as severity of human sickness in patients.
2) To evaluate the effectiveness of various treatment options.
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Students use a microscope to look for structures present in four different cells. The students
placed an X for each structure that was viewed for each cell on the table shown.
Which cell (or cells) were most likely a eukaryote? Choose the BEST ANSWER CHOICE
A. Cell X only
B. Cell X and Cell Y
C. Cell W and Cell Z
D. Cell X, Cell Y and Cell Z
Cell Z
Answers
Which is an example of a scientist using a mathematical model to describe
the atom?
OA. The scientist thinks of the atom as being like a planet and its
moons.
OB. The scientist uses ping-pong balls to represent protons, neutrons,
and electrons.
OC. The scientist has a computer calculate how far the electrons are
from the nucleus.
OD. The scientist draws a picture of an atom, being as accurate as
possible.
Answers
The scientist has a computer calculate how far the electrons are from the nucleus is an example of a scientist using a mathematical model to describe the atom.
What is a Mathematical model?This type of model uses mathematical concepts and language and is used as a form of quantitative analysis by using the variables present in the model.
This model helps to define the relationship between the variables and an example is to calculate how far the electrons are from the nucleus in which different mathematical terms are used which is why option C was chosen as the most appropriate choice.
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which correctly describes what is occurring at the four different stages of the cell cycle?
Answers
Answer: B
G1: the cell prepares for DNA replication
S: replication of DNA occurs
G2: the cell checks to make sure that division can occur
M: the cell divides
Above sequence correctly describes what is occurring at the four different stages of the cell cycle. Therefore, option (B) is correct.
G1, S, G2, and M comprise the cell cycle. The cell develops, synthesises proteins, and prepares for DNA replication in G1. DNA replication prepares the cell for division during the S phase. In G2, the cell checks for DNA replication mistakes and confirms that all cellular components are present for division.
Through the M phase, the cell divides through mitosis and cytokinesis, creating two daughter cells. The cell cycle regulates DNA replication and cell division for optimum cell function and growth. Therefore, option (B) is correct.
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The mass of an atom is fou
Answers
Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutron.
Explanation:
30 POINTS PLEASE HELP
which option is a sign that an experiment would benefit from a redesign?
The experiment contained control groups.
The hypothesis is supported by the results.
Only the independent variable in the experiment was changed.
The results refute the hypothesis.
Answers
Only the independent variable in the experiment was changed.
Explanation:
Step 1: Define your variables. You should begin with a specific research question. ...
Step 2: Write your hypothesis. ...
Step 3: Design your experimental treatments. ...
Step 4: Assign your subjects to treatment groups. ...
Step 5: Measure your dependent variable
Nature has ways of keeping the nitrogen,
carbon, and phosphorus cycles in balance.
However, run-off from animal operations and
fertilizers in our waterways can result in
A. cultural eutrophication
B. erosion
C. cleaner drinking water
D. an increase in water temperature
Answers
Answer: A. Cultural eutrophication
Explanation:
Correct option A.) cultural eutrophication.
When nitrogen and phosphorus from fertilizer are carried in runoff to lakes and oceans, they could purpose eutrophication, the overgrowth of algae. The algae can also additionally expend oxygen from the water and create a lifeless sector.
Most fertilizers utilized in agriculture—and on lawns and gardens—comprise each nitrogen and phosphorus, which can be carried to aquatic ecosystems in floor runoff. Fertilizer carried in runoff can also additionally purpose immoderate boom of algae or different microbes that have been formerly constrained through nitrogen or phosphorus. This phenomenon is known as eutrophication. At least in a few cases, phosphorus, now no longer nitrogen, appears to be the principle driving force of eutrophication.
Regions of lakes and oceans which can be depleted of oxygen because of a nutrient inflow are known as lifeless zones. The range of lifeless zones has elevated for numerous years, and greater than four hundred of those zones existed in 2008. One of the worst lifeless zones is off the coast of the US withinside the Gulf of Mexico. Fertilizer runoff from the Mississippi River Basin created a lifeless sector of over 8,463 rectangular miles.
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