Victor has been studying the vascular systems of plants. He wanted to find out if food coloring would travel up the stalk of celery faster if the temperature of the water increased. Victor set up his experiment with three cups of colored water at different temperatures, three equal sized celery stalks, and a stopwatch. Cup A was filled with colored water at 21 C. Cup B was filled with cold colored water at 4 C, and Cup C was filled with warm colored water at 30 C. One celery stalk was placed in each cup at the same time. Victor timed how long it took the colored water to travel to the leaves at the top of the celery stalk. He measured the time in minutes. What is the independent variable
Answers
Answer:
temperature
Explanation:
The independent variable would be the colored water at different temperatures.
The independent variables are changeable or controllable variables supplied directly by researchers in the course of experiments. They produce effects on the dependent variable and are thus referred to as the 'cause' variable. The dependent variables are referred to as the 'effect' variables because their values vary based on that of the independent variables.
In this case, the only controlled variable of all the variables supplied by Victor is the temperature of the colored water. Changing the temperature of the colored water is expected to have effects on the time it will take for the colored water to travel to up the stalk of celery. Hence, the temperature is considered as the independent variable while the time it takes for the colored water to travel to the leave would be the dependent variable.
Related Questions
common disorder of the ear
Answers
Answer:
an inflammation of the inner ear caused by a bacteria or virus that causes fluid to accumulate behind the eardrum. It is not serious if treated correctly and does not return repeatedly.
Otosclerosis: the abnormal growth of the small bones in the middle ear.
Explanation:
just look it up :)
Mrs. Wallace used a force of 300N to accelerate a 150kg pile of ungraded papers because the time change made her cranky. What is the acceleration of the papers
Answers
Answer: The acceleration of the papers is 2 meters per second squared.
Explanation: To calculate the acceleration of the papers, we can use the following formula:
a = F/m
where: a represents the acceleration in square metres per second.
F is the force in Newtons, and m is the kilogrammes of mass.
When we enter the values we are aware of, we obtain:
a = 2 m/s2 when a = 300 N / 150 kg
The papers are therefore moving at an acceleration of 2 metres per second squared.
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Select all of the organ systems that are directly part of our immune system?
Answers
What are the three main categories of forests?
Answers
The three categories of forests are separated into temperate, tropical, and boreal.
Answer:
There are three type of forest they include boreal, temperate and tropical forest
Explanation:
Temperate forest is mostly found across the Eurasia and East North America which vary throughout the year mainly because of the of the four main season which are on the latitude. Tropical forest is mainly found near the equator like Central America, Southern Asia and also sub Saharan Africa. Boreal forest is also known as Taiga is known to be the largest biomes land found in North America, Siberia, and Scandinavia.
List where all of the ATP molecules come from and how you add up to the total
Answers
Answer:
Explanation:
ATP molecules are used by all living organism as energy to carry out life functions. Also notable, ATP stands for Adenosine Triphosphate. This molecule is composed of three parts:
Adenine
Ribose
Three Phosphate Groups
Monterey Bay, on the California coast, contains a diverse and complex ecological community. A variety of seaweeds and single-celled algae make up the base of the food web. Many animals, such as sea urchins, abalone, snails, and crabs, graze on these photosynthetic organisms. Otters and small fish eat all of these primary consumers and in turn are eaten by orcas and sharks. Orcas eat many other smaller organisms, including dolphins, sea lions, harbor seals, and many kinds of fish. Sea stars prey on sea urchins, abalone, and snails, whereas octopus eat crabs, fish, and sea stars. Sea lions and harbor seals eat predominantly fish. Sea cucumbers eat dead organic matter that falls to the sea floor. Place each of the organisms in the trophic pyramid based on where it gets its energy. Each organism will be used only once even if some of the organisms consume organisms from several trophic levels. Place organisms that eat from several trophic levels at the highest possible trophic level. For instance, a shark that eats sea lions, octopus, otters, and fish would be placed at the highest trophic level on the pyramid, even though the shark eats both secondary and tertiary consumers. You are currently in a labeling module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop.The illustration has a trophic pyramid that contains a producer level labeled trophic level one, a primary consumer level labeled trophic level two, a secondary consumer level labeled trophic level three, a tertiary consumer level labeled trophic level four, a quaternary consumer level labeled trophic level five, and a section for decomposers and detritivores. Answer Bank
Answers
The trophic web is the transference of energy through different trophic levels. TL1) algae, seaweed /TL2) urchins, abalone, snails, crabs / TL3) sea-stars, otter, fish /TL4) octopus, sea lions /TL5) orca / Detritivore) cucumbers.
----------------------------------------
The trophic web is a relationship process between different organisms, through which occurs transference of energy.
The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
• The first link corresponds to a producer organism -autotroph-.
• The following links are the consumers -heterotrophs-: herbivores and carnivores.
• The last links are the decomposers that degrade organic matter from dead organisms.
As it is a web, all organisms are equilibrated until a change occurs.
When the change affects any of the involved links, there can be a cascade effect on the web.
A change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
Trophic pyramid:
The trophic web can be represented as a pyramid.
The base of the pyramid is always composed of producers, followed by primary consumers, secondary, tertiary, and so on.
Outside the pyramid and closing the cycle, we can find decomposers and detritivorous.
Now, to complete the trophic pyramid, let us analyse information provided by the statement.
We will see who feeds on who.
seaweeds and single-celled algae ⇒ photosynthetic organismssea urchins, abalone, snails, and crabs ⇒ feed on photosynthetic organismsSea stars ⇒ prey on urchins, abalone, snailsOctopus ⇒ eat crabs, fish, and sea stars Otters and small fish ⇒ eat urchins, abalone, snails, and crabs Sea lions and harbor seals ⇒ feed on fishesOrcas and sharks ⇒ feed on otters, fishes, dolphins, sea lions, sealsSea cucumbers ⇒ eat dead organic matterThe options to complete the pyramid are snail, abalone, orca, otter, single-celled algae, urchin, small fishes, seaweed, crabs, sea lion, cucumber, octopus, and sea-star.
According to the analysis we did before about who feeds on who, we will complete the pyramid.
Producers TL1 ⇒ seaweeds and single-celled algaePrimary consumers TL2 ⇒ sea urchins, abalone, snails, and crabsSecondary consumer TL3 ⇒ Sea-stars, Otters and small fishTertiary consumer TL4 ⇒ Octopus, Sea lionsQuaternary consumer TL5 ⇒ OrcaDecomposer/Detritivore ⇒ Sea cucumbers-------------------------------------------------------------
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What is the scientific definition of work?
A. Work is a physical quantity calculated by multiplying the force on an object by the distance the object moves while the force is applied.
B. Work is a push or pull on an object.
C. Work is the ability to move or change an object.
D. Work is a physical quantity calculated by dividing the force on an object by the time interval in which the force is applied.
Answers
Answer:
work is defined as the rate of force and distance of an object
A molding machine in a factory was not working very well. About a third of the time, the plastic squirt guns that it was making come out with a flaw in the handle. The repair mechanic adjusted the stamping pressure. Then she ran one gun through. It came out just fine, so she figured she had solved the problem. What was/were the error(s) in the conclusion of the repair mechanic?
a. Not enough subjects
b. Subjects were not similar
c. Conditions were not kept the same
d. The experiment was not reproduced
Answers
Answer:
a. Not enough subjects
Explanation:
In the context, it is given that in a factory, a molding machine is not working properly. The molding machine produces a gun made of plastic. But the machine was produces a defective piece about a third of he time it produces the gun.
The mechanic adjusted and repaired the stamping pressure and ran only one gun through which came out to be fine. But there was an error in the conclusion of the repair mechanic as she did run the machine only one time. She did not have enough subjects and should have run many times to see if the error still exists, as the machine showed error only about a third of the time during the process.
Thus the error in the experiment includes the lack of the enough of the subjects. We cannot come to the conclusion only with one time success.
Answer:
A
Explanation:
not sure but i think
When energy changes from one form to another, the amount of energy
A) increases
B) decreases
C) remains the same
D) sometimes increases, sometimes decreases
Answers
Answer:
C: Remains the same
Explanation:
What evidence supports effects of the environment on natural selection?
Answers
Darwin's theory of natural selection states that organisms that are best adapted to their environment have the highest chances of survival.
He found physical characteristics such as beak size, weight, and number of eggs laid. It depended on the type of food they ate and the environment of the island. This observation paved the way for establishing the process of natural selection in evolution.
This means that the genetic code carried by these surviving organisms is the code that is passed on. This is the form of this organism that survived while others did not. Of all the evidence Darwin used to support his theory of evolution, the most famous was Darwin's finch in the Galapagos Islands off mainland Ecuador.
How did the environment influence the process of natural selection?
Deleterious mutations were eliminated by natural selection. Because frogs with mutations did not survive. Beneficial mutations were reinforced because frogs carrying the mutation had the highest chances of survival and reproduction. This shows how the environment influences the process of natural selection.
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Lectins often bind their ligands via multiple weak interactions. bind their ligands with relatively low specificity. prevent viruses from binding to their target cells. are carbohydrates that bind to receptor proteins.
Answers
Answer:
The correct answer is - B.often bind their ligands via multiple weak interactions.
Explanation:
Lectins are specific types of proteins that identify and bind to specific carbohydrates present on the cell surfaces. They have an essential role in interactions and communication between various cells for identification and recognition.
Binding sites of lectins on the surface of one cell bind to the Carbohydrates on the surface of another cell. A lectin usually has two or more binding sites for carbohydrate units.
How much time is 68% in 24 hours
Answers
Answer:
16 hours 19 minutes and 12 seconds
or 16.32 hours
Explanation:
24 * 0.68
What is the relationship between structure and function in the body? Provide an example from the human body.
Please help me!!
Answers
Which of the following is not true of eukaryotic cells?
( WILL REWARD BRAINLIEST )
A. Eukaryotic cells have a nucleus to hold, protect, and organize the genetic material
B. Eukaryotic cells are considered very primitive and basic
C. Eukaryotic cells can be unicellular and multicellular
D. Eukaryotic cells can reproduce easily
Answers
Answer:
C) Eikaryotic cells can be unicellular and multicellular
Answer:
B. Eukaryotic cells are considered very primitive and basic
Explanation:
Prokaryotic cell is considered to he more primitive than eukarya
place the following steps in order to describe how herbicide resistance is the result of natural selection.
Drag the text blocks below into their
correct order.
Because glycophosphate inhibits the production of EPSP synthase, some weeds
cannot make the amino acids needed for survival and they die. Other weeds
carry extra copies of the EPSP synthase gene and can produce enough amino
acids to survive.
Weeds carrying extra copies for EPSP synthase produce offspring that also have
copies of the EPSP synthase gene and can also tolerate glycophosphate.
Large percentages of weeds in an area are now resistant to glycophosphate.
More glycophosphate is now needed to compensate for the extra copies of
genes coding for EPSP synthase.
Glycophosphate is applied to a crop.
Answers
Weeds develop resistance to herbicides through evolution, largely as a result of selection driven by repeated application of the same herbicide or products with the same mode of action.
Describe the process by which natural selection results in herbicide resistance using the steps below.
Step 1:
The crop is treated with glycerophosphate.
Describe the process by which natural selection results in herbicide resistance using the steps below.
Step 2:
Some weeds die when they are unable to produce the amino acids they need to survive because glycerophosphate prevents the enzyme EPSP synthase from being produced. Additional copies of the EPSP synthase gene are found in other weeds, allowing them to produce sufficient amino acids for survival.
Describe the process by which natural selection results in herbicide resistance using the steps below.
Step 3:
The offspring of weeds that have additional copies of the EPSP synthase gene also have copies of the EPSP synthase gene and are able to tolerate glycerophosphate.
Describe the process by which natural selection results in herbicide resistance using the steps below.
Step 4:
Glycerophosphate is now resistant to a lot of weeds in a region. To make up for the extra copies of genes that code for EPSP synthase, we now need more glycerophosphate.
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Question 2
Now collect your data, starting with your resting pulse rate. Follow these steps, and write your results in
the table.
1. Sit as still as possible for 10 minutes, and then measure your pulse for 10 seconds. Repeat this test
two more times.
2. For each trial, multiply the measure by 6 to find the number of beats per minute.
3. Take an average of the three values to get an average resting pulse rate per minute.
BIY X¹ X₂ 10pt
AVE
Trial 1
Trial 2
Trial 3
Beats Counted in 10 Seconds
Beats per Minute
Average:
Answers
The average resting pulse rate is 72.0 beats per minute.
BIY X¹ X₂ 10ptAVE Trial 1 Trial 2 Trial 3 Beats Counted in 10 seconds 12 11 13 Beats per Minute 72 66 78 Average 72.0+66.0+78.03=216.0/3=72.0The given table displays the resting pulse rate data for a person.
In order to find the average resting pulse rate, follow these steps:1. Sit as still as possible for 10 minutes, and then measure your pulse for 10 seconds. Repeat this test two more times.
2. For each trial, multiply the measure by 6 to find the number of beats per minute.
3. Take an average of the three values to get an average resting pulse rate per minute.
The average resting pulse rate can be calculated by summing up the three trial pulse rate readings and then dividing the sum by three as shown below. Average = 72.0+66.0+78.0/3=216.0/3= 72.0.
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Identify structure A. Identify structure B. Identify structure C. Identify structure D.
Answers
Answer:
identify struture A answer-chloroplast
Explanation:
Answer:
A: Chloroplast
B: Stroma
C: Granum
D: Thylakoid
Explanation:
just did it on edge
how bones attach to each other and to muscles and how this aids movement
Answers
Answer:
Tendons connect the bones.
Explanation:
The muscles are connected to bones through tendons, and this way the contraction of the muscle helps the movement of the bones through them.
The muscles work in pairs and in this way they move. While one muscle is contracting, the other one relaxes.
The muscles work in a form of contraction-relaxing. The flexor contracts to bend a limb at a joint.
A 10 year old boy is 1.55 m tall & has a BMI of 28.(a) What can you conclude from his BMI? (1mk)(b) How much does he weigh? (3mks)
Answers
You can calculate BMI using this formula:
\(\text{BMI}=\frac{weight\text{ (kg)}}{hight(m^2)}\)a) To conclude you need to compare the BMI of this year old boy with the normal BMI for this age (you should have a table with normal BMI or you can search it on the internet) . If it is higher it can be overweight or obese, if it is lower compared to the normal BMI it is underweight. From what I saw when BMI is above 24.9 it is considered overweight.
b) In this exercise you have to solve the equation, you consider that weight is an X and take into account units
\(BMI=\frac{X}{1.55(m)^2}=28\)Which vegetables are the most and least similar to wild cabbage? What does
this tell you about the selective breeding process for each vegetable?
Answers
The most similar vegetables to wild cabbage include broccoli, cauliflower, kohlrabi, kale, and Brussels, while selective breeding can be used as a process to improve crop features.
What is the procedure of selective breeding in crops?The procedure of selective breeding in crops makes reference to the genetic cross between plants in order to select F1 with desired features.
Therefore, with this data, we can see that the procedure of selective breeding in crops is very useful in order to improve phenotypic features such as yield and or resistance to diseases in such crops.
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What conditions must be present for a hurricane to form?
A. A thunderstorm that mixes with cool ocean water and cool, moist air, allowing it to grow
in size and strength
B. The same conditions that form a tornado
C. A thunderstorm that forms over warm ocean water
D. Heavy winds, torrential rain, and storm surges
Answers
Answer:
C. A thunderstorm that forms over warm ocean water.
Explanation:
The correct condition for a hurricane to form is option C: A thunderstorm that forms over warm ocean water. Hurricanes are tropical cyclones that require specific atmospheric and oceanic conditions to develop. The primary factors necessary for hurricane formation include:
Our mountain regions are unique and beautiful places. We must preserve them for future generations. One of the most serious threats to our mountains is ridgetop development. Large housing developments built on steep slopes and along mountain ridges are unsightly. Also, they adversely affect the scenic views that draw tourists to our region each year. Who wants to drive to the mountains to see not the lovely tree-covered outline of the gently sloping mountain ridges against the sky, but rows of houses jutting from the ridges and slopes with little or no tree cover between them? With tourism as the biggest industry in our area, maintaining our scenic ridgelines is crucial to continued economic success here.
Ridgetop development not only detracts from scenic mountain views and threatens our area’s top industry, it also harms the environment. Stripping large areas to create multiple building sites removes the trees and other plants. These resources provide natural erosion barriers on steep slopes. Large housing developments on ridges often increase erosion and runoff into streams and rivers.
What type of essay is this, primarily?
Answers
This is a persuasive essay primarily focused on highlighting the negative impact of ridgetop development on mountain regions.
The essay provided presents a clear argument and aims to persuade the reader about the importance of preserving mountain regions by discouraging ridgetop development. The writer expresses their opinion on the issue and supports it with reasons and evidence.
The essay falls under the category of a persuasive essay, as its main objective is to convince the audience to take action or support a specific viewpoint. The author emphasizes the unique beauty of mountain regions and the need to preserve them for future generations. They argue against ridgetop development by highlighting the negative consequences it has on scenic views and the tourism industry.Additionally, the detrimental environmental impact of stripping large areas and increasing erosion is discussed.Overall, the essay combines persuasive techniques, such as presenting arguments, providing evidence, and appealing to the reader's emotions, to advocate for the preservation of mountain regions and discourage ridgetop development.
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Birds differ from their closest relatives, the reptiles, in what ways?
(choose all that apply)
the bones of reptiles are too lightweight to permit flight
birds are capable of powered flight, while some reptiles can glide
birds have feathers, reptiles have scales
only the birds lay eggs on land; the reptiles can only lay their eggs in water
the reptiles have a series of internal air sacs that allow a very efficient extraction of oxygen
birds are endothermic, while reptiles are generally ectothermic
1 pts
Answers
Answer:
birds have feathers, reptiles have scales
birds are endothermic, while reptiles are generally ectothermic
Explanation:
The main difference between birds and reptiles is that birds have feathers on their body while on the other hand, reptiles ahve dry skin and have scales. Reptiles are ectotherms, while birds are endotherms. An ectotherm relies on its external environment to regulate the temperature of its body whereas Endotherms are able to regulate their body temperatures by producing heat within the body.
In a population the homozygous dominant individual make up 70% of the population while heterozygous ones made up 21% and recessive made up 9%. What are the frequencies of the A and a alleles?
Answers
There are two alleles in a population that influence a specific attribute. Using the letters "A" for the dominant allele and "a" for the recessive allele. A allele frequency is 0.7, whereas frequency of allele is 0.09.
The frequency of the A allele is 0.7, or 70%, since homozygous dominant (AA) genotypes account for 70% of the population. Similarly, since homozygous recessive (aa) alleles make up 9% of the population, we can infer that the frequency of the recessive allele, a, is 0.09, or 9%.
The formula 2pq = frequency of heterozygotes, where p is the frequency of the A allele and q is the frequency of the an allele, can be used to determine the frequency of the heterozygous genotype (Aa).
We know that the frequency of heterozygotes is 0.21, or 21%.
Plugging in the known values:
2 * 0.7 * q = 0.21
Solving for q:
q = 0.15
So, the frequency of the A allele is 0.7, and the frequency of the a allele is 0.09.
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what will be the consequence if humans continue to over-hunt elephants for their ivory
Answers
Answer:
Extinction
Explanation:
Answer:
extinction if they are hunted so much
Describe the mechanism of glycolysis in detail
Answers
The process of Glycolysis is a catabolic process in which two molecules glucose goes through a ten- step pathway and yield two molecules of pyruvate . It is a major part of carbohydrate metabolism .
Mechanism Of Glycolysis
The glycolysis is also known as EMP pathway and it is involved in both aerobic and anaerobic conditions .There are two phases in the mechanism of glycolysis in which 5 reactions takes place in each phase and the process of glycolysis takes place in cytosol
Preparatory phase refers to the generation of two molecules of glyceraldehyde 3-phosphate from one molecule of glucose which further goes into the payoff phase . In this phase two molecules of ATP are used and two regulatory enzymes were involved in this reaction .
Payoff phase refers to the further break down of two molecules of glyceraldehyde3-phosphate to two molecules of pyruvate . In this phase four molecules of ATP and two molecules of NADH are generated . In this phase only one regulatory enzyme is involved which is the breakdown of PEP to pyruvate .
Both the phases of glycolysis takes place in the cytoplasm and there are three enzymes that involved in regulating the glycolytic pathway .This process is also known as the catabolic process .
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what are two ways cellular aging occurs
Answers
Hope this helps
What was the climate like prior to the extinction ?
Answers
Answer:
The extinction you are referring to is unclear, as there have been several mass extinctions throughout Earth's history. However, it is generally accepted that climate has played a significant role in many of these events. Prior to some of the mass extinctions, such as the Permian-Triassic extinction and the Cretaceous-Paleogene extinction, the climate was warm and tropical with high levels of carbon dioxide in the atmosphere. This warm climate was likely a contributing factor to the extinction, as it may have led to changes in sea level, ocean circulation, and weather patterns that disrupted ecosystems and caused widespread extinction of species. However, it is important to note that climate is just one of many factors that can contribute to mass extinction events, and there are often multiple causes involved.
Please for the love of lawd help.
Three pieces of evidence of universe expansion support the Big Bang Theory. The first piece of evidence, which Edwin Hubble discovered, is that_____
The second piece of evidence is the change in universal temperature. The temperature_____
The third piece of evidence is that Cosmic Microwave Background radiation is found______
:: uniformly across the universe
:: has increased dramatically
:: galaxies are moving toward each other
:: galaxies are moving away from each other
:: has decreased dramatically
Answers
1)a distant luminous object travels rapidly away from an observer.
2)Dark matter provides the gravity that allows the stars to rotate at the same speed.
3)1 galaxy is moving away from each other 2 has decreased dramatically 3 uniformly across the universe
4)1 matter 2 formations of galaxies 3 remained uniform
5)Nuclear fission takes place in the core of stars.
6)The gravity of dark matter distorts light from distant sources.
7)They both occur in the nucleus of an atom. -They both release large amounts of energy.
8)It is the proportion predicted to be present in the early universe.
8)Through dark energy, the universe is expanding at a faster and faster rate. -Because of dark matter, gravitational interactions cause galaxies to develop.
9)It verifies that the early universe was once extremely hot.
Hello, Connexus friends hopes this helps this is all the review questions + they correct cuz I got 10 out of 10 let me know if you need help!
The first piece of evidence Hubble has discovered is that galaxies are moving away from each other. The second piece of evidence is that the universal temperature has increased dramatically. The third piece of evidence is that cosmic microwave background radiation is found uniformly throughout the universe.
We can arrive at this answer because:
The Big Bang theory claims that the universe and all of its elements arose from a strong explosion.Although it is a debated and questioned theory, Edwin Hubble found evidence that proves its veracity and is accepted by many scientists.Within this evidence, Hubble claims that the universal temperature continues to increase drastically, which causes the galaxies to move away.The Big Bang was generated from a large amount of pressure and temperature, which caused the universe to expand, so Hubble's evidence may be true.Furthermore, Hubble claims that cosmic microwave background radiation is found uniformly throughout the universe and that this is a trace of the Big Bang.
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Directional terms I need help asap so baldy please
Answers
Directional terms for the numbered arrows are:
superior/cranialposterior/dorsaldistalanterior/ventralinferioranteriormediallaterallateralmedialWhat are directional terms?In anatomy, directional terms are used as a compass to describe where structures are located in relation to other parts of the body. It is a useful part of anatomy that provides basic communication and limits confusion.
These directions go together with body planes and are applied to these planes to describe regions and sections of the body with specificity. The directional terms are anterior, posterior, lateral, medial, distal, proximal, dorsal, inferior, superior, bilateral, deep, visceral, axial, caudal etc.
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