Mrs. Hendren has decided that she would like to grow some tomatoes and wants to know how much light is the best amount, so she plants tomato seeds in 4 different pots and leaves one pot in the dark, she gives 6 hours of light a day to the second, eight hours of light a day to the third, and ten hours of light a day to the fourth. After 3 months she measures the size of the tomatoes grown. What is the independent variable?
Answers
Answer:
The correct answer is - the amount of the light received by pots.
Explanation:
An Independent variable is a type of variable which is a change or manipulated in aspecific research or study to find the response of the dependent variable.
In this study, to find the effect of the light on the plant Mrs. Hendren uses the time period of light received by the pots of the plant in order to see the effect on the plant. So the variable that is manipulated is the amount of the light received by the pots.
Related Questions
A student wanted to determine what concentration low, medium, or high of a chemical released from brown algae prevented coral larvae from settling and growing on the algae. Each concentration level of the chemical from one brown alga was added to the water Percent of Larvae Settled of each tank. Tank size, water temperature, and algae species were held constant. A different number and species of larvae were dropped into each tank. After three days, the percent of settled larvae for each concentration of inhibiting chemical was found.
1. Evaluate What are the design flaws in this experiment?How would you change the experiment to make the results more valid?
2. Analyze The student concluded that at all levels the inhibiting chemical affected the rate of settlement of marine larvae. Is this an accurate conclusion based on the data collected? Explain.
Answers
The described experiment contains a number of design issues. The key problems are a lack of a control group, a small sample size, limited replication, and lack of randomization in 0ther words, the experiment should include a control group, be replicated, have the assignment be random, and have a larger sample size to ensure the results are more reliable.
The flaws in the experiment and the analysisThe experiment described has several design flaws that impact the validity of the results. The major flaws include the absence of a control group, limited sample size and replication, lack of information about the inhibiting chemical, and no randomization. To improve the validity of the results, the experiment should include a control group, increase the sample size and replication, randomize the assignment of larvae, provide information about the chemical, and follow standardized protocols.
Based on the information provided, it is not possible to accurately conclude whether the inhibiting chemical affected the settlement rate of marine larvae at all concentration levels. Without a control group and proper statistical analysis, it is difficult to determine the specific impact of the inhibiting chemical.
A comparison between the settlement rates observed in the presence of the inhibiting chemical and those in the control group, along with appropriate statistical tests, is necessary to make an accurate conclusion. Further analysis, such as effect sizes and confidence intervals, would provide a more comprehensive understanding of the relationship between the inhibiting chemical and larval settlement rates.
Learn more on algae here https://brainly.com/question/800121
#SPJ1
What is the correct order of steps for the scientific method?
O Ask a question, research; form a hypothesis; perform an experiment; analyze data; draw a conclusion
O Ask a question; form a hypothesis; research; perform an experiment; analyze data; draw a conclusion
O Form a hypothesis; ask a question; research; perform an experiment; analyze data; draw a conclusion
O Research; form a hypothesis; ask a question; perform an experiment; analyze data; draw a conclusion
Answers
Answer: Ask a question; research; form a hypothesis; perform an experiment; analyze data; draw a conclusion
Explanation: Because before you research you have to ask a question, and before you form a hypothesis you should research so that you can make sure that you are using the right facts.
What is the relationship between genetic mutations and DNA?
Answers
Answer:
Change in DNA sequence leads to genetic mutation.
Explanation:
A mutation is a change in DNA. The organisms DNA can affect the way it looks in the future and can cause changes in the aspects of that organisms life. Mutation is quite crucial to evolution and is the raw material of genetic variation. The way the DNA functions can affect the mutation.
Chen draws a diagram to show water changing from a liquid to water vapor. Complete the sentences. _______All the water molecules in the liquid are moving. ________ Some of the molecules have more .________ These molecules move enough to escape the surface of the liquid. This is called . ________ This makes the liquid become
Answers
kinetic energy is needed by the molecules in order to escape from the surface.
All the water molecules in the liquid are moving randomly due to the presence of some energy in it. Some of the molecules have more kinetic energy due to absorption of heat energy from the surrounding environment.
Due to high kinetic energy, these molecules move enough to escape the surface of the liquid. This is called boiling point. This makes the liquid become gas so we can conclude that kinetic energy is needed by the molecules in order to escape from the surface.
Learn more about boiling point here: https://brainly.com/question/40140
Learn more: https://brainly.com/question/25893146
The group of cells in the hypothalamus that is stimulated by food intake is known as the ________ center.
A) eating
B) satiety
C) basal
D) energy
Answers
The group of cells in the hypothalamus that is stimulated by food intake is known as the eating center. The correct option is A) eating.
The hypothalamus is a part of the brain that links the nervous system to the endocrine system through the pituitary gland. The hypothalamus contains various nuclei that regulate a variety of physiological and behavioral processes, including the regulation of appetite and energy expenditure.
There are two types of nuclei present in the hypothalamus; one is the hunger (feeding) center, and the other is the satiety center. Hunger refers to the desire to consume food, while satiety refers to the sensation of being full or satisfied after eating. The hunger center is responsible for stimulating food intake, while the satiety center is responsible for suppressing food intake.
The hypothalamus, which is the area of the brain that regulates eating and drinking, is stimulated when the body requires food. Hormonal changes signal the hypothalamus to increase or decrease appetite, depending on the body's needs. Eating too much or too little can lead to hormonal imbalances, resulting in obesity or anorexia.
To learn more about the hypothalamus here
https://brainly.com/question/32900534
#SPJ11
Guys please help!
I'll give brainlest for the correct answer
I only need the answers for 1 and 2
Answers
Answer: for 1 respectively.
ill, explain, scurvy , deficiency,
Lack, nutrients , nutrients
2. Anaemia = iron
Kuashiaorkor= protein
Scurvy= Vitamin C
Beri beri = vitamin B-1
Rickets= vitamin D
Night blindness = vitamin A
The initial population of a bacteria colony is observed to be 500 bacteria. The population shows a growth rate of 50% per day, and the carrying capacity of the surrounding is estimated to be 2,000,000 bacteria. To the nearest whole number, find the population of bacteria after 15 days. A 165,822 bacteria B 622,707 bacteria C) 903,430 bacteria 2,000,000 bacteria
Answers
The population, to the nearest whole number, of bacteria after 15 days is approximately 4,769 bacteria, The correct option is E, None of the above.
To find the population of bacteria after 15 days, we can use the formula for exponential growth:
N = N₀ * \((1 + r)^t\)
Where: N = Final population after time t N₀ = Initial population r = Growth rate per time period t = Time period
Given: N₀ = 500 bacteria r = 50% per day (or 0.5) t = 15 days
Plugging in the values, we have:
N = 500 * \((1 + 0.5)^{15\)
Calculating this expression:
N = 500 * \((1.5)^{15\) N
= 500 * 9.537 N
= 4,768.5
Thus, the correct option is E, None of the above.
To learn more about bacteria follow the link:
https://brainly.com/question/15490180
#SPJ4
The question is inappropriate; the correct question is:
The initial population of a bacterial colony is observed to be 500 bacteria. The population shows a growth rate of 50% per day, and the carrying capacity of the surrounding area is estimated to be 2,000,000 bacteria. To the nearest whole number, find the population of bacteria after 15 days.
A. 165,822 bacteria
B. 622,707 bacteria
C. 903,430 bacteria
D. 2,000,000 bacteria
E. None of the above
a. there will be excessive algae growth that stems from phosphorus which is found in rocks and deep ocean sediment. which leads to a lot of deaths in the ecosystem. true or false
Answers
The given statement "There will be excessive algae growth that stems from phosphorus which is found in rocks and deep ocean sediment. Which leads to a lot of deaths in the ecosystem" is partly true.
Phosphorus is a nutrient that is naturally found in rocks, soil, and ocean sediment. It is essential for plant growth and is a primary component in many fertilizers. However, excessive amounts of phosphorus can cause algae blooms that lead to oxygen depletion and other problems that may affect aquatic organisms in the ecosystem. Thus, the given statement is true to a certain extent. As algae grow, they take in oxygen and nutrients from the water, including phosphorus. When they die, they sink to the bottom, where bacteria decompose them. This process consumes oxygen, reducing the amount of oxygen available to other organisms. In extreme cases, it may result in a hypoxic or anoxic zone, where there is no oxygen left. This can lead to the death of many organisms in the ecosystem. Therefore, it is important to regulate the amount of phosphorus released into the ecosystem to avoid excessive growth of algae, and hence, deaths in the ecosystem.
To learn more about ocean sediment here
https://brainly.com/question/8898461
#SPJ11
What is the basic unit of life? A. An atom B. A cell C. An organism D. An organ
Answers
Answer:
B. A cell
Explanation:
The cell is needed for every living organism and is one of the most basic units of life. Cells are like building blocks in an organism.
Hope this helped! :)
A naive B cell is a cell that
lacks B cell receptors (BCRs) and is waiting to be activated
has BCRs and is waiting to bind its dream antigen
has MHC and BCR and is waiting to bind its dream antigen
has antigen bound to BCRS and is differentiating to plasma cells
none of the above
Answers
A naive B cell is a cell that has MHC and BCR and is waiting to bind its dream antigen.What are B cell receptors?B cell receptors (BCRs) are transmembrane proteins that are located on the surface of B cells. BCRs have two heavy chains and two light chains that are linked by disulfide bonds and form a Y shape.
BCRs are composed of two antigen-binding sites, one on each arm of the Y. The antigen-binding site is made up of the variable domains of the heavy and light chains. The constant regions of the heavy and light chains are found in the transmembrane and cytoplasmic domains of the BCRs.
The specific recognition of antigens by B cells is mediated by BCRs. B cells are activated by antigens that are bound to their BCRs. The activation of B cells results in their differentiation into plasma cells, which secrete antibodies, and memory B cells, which persist in the body for long periods of time and quickly respond to subsequent exposure to the same antigen.
Learn more about the receptors here
https://brainly.com/question/25753221
#SPJ11
the hair color of a hypothetical species of mammal is determined by a single gene. the black fur allele is dominant to the brown fur allele. if you cross two black-furred heterozygotes, what will be the ratio of fur colors in the offspring?
Answers
The ratio of fur colors in the offspring of two black-furred heterozygotes will be 3:1 ratio of black fur to brown fur.
Heterozygotes contain both the dominant and recessive alleles, meaning that both will be passed on to the offspring.
The black fur allele is dominant over the brown fur allele. In genetic terms, the genotypes of the parents would be Bb (black fur allele dominant, brown fur allele recessive) and Bb (black fur allele dominant, brown fur allele recessive). Crossing them can be represented by the following Punnett square:
B | b
B | BB | Bb
b | Bb | bb
where B represents the black fur allele and b represents the brown fur allele.
The possible genotypes of the offspring are BB, Bb, and bb.
BB individuals will have black fur
Bb individuals will also have black fur since the black fur allele is dominant to the brown fur allele
bb individuals will have brown fur
The ratio of black-furred to brown-furred individuals in the offspring can be determined by counting the number of individuals with the BB, Bb, and bb genotypes.
From the Punnett square above, we see that:
25% of the offspring will have BB genotype (black fur)
50% of the offspring will have Bb genotype (black fur)
25% of the offspring will have bb genotype (brown fur)
Since the black fur allele is dominant, the offspring will have a 3:1 ratio of black fur to brown fur.
Learn more about heterozygotes here: https://brainly.com/question/3676361.
#SPJ11
What would happen to the rate of activity if you place Pepsin in the small intestine with a pH of 6?
Answers
Answer:
When it reaches the duodenum, though, it assumes an inactive form as the pH rises above 6. Pepsins are secreted by Brunner's glands of the duodenum, and the crypts of Lieberkühn of the small intestine secrete an aqueous fluid.
Identify the organelle *
1 point
Outer membrane
Inner membrane
Crista
Matrix
DNA
ma
O Ribosome
O Mitochondria
Ο Ο Ο Ο
Nucleus
O Chloroplast
Answers
Explanation:
Mitochondria
hope it helps u
what study design may be either retrospective or prospective? explain
Answers
The study design that may be either retrospective or prospective is a cohort study.
What is a cohort study?
A cohort study is an observational study that is used to analyze the relationship between exposure and outcomes. It involves selecting a group of individuals based on their exposure to a particular factor, such as smoking or drinking, and tracking their health outcomes over time.
Retrospective and prospective study designs?
The retrospective cohort study design involves looking back at the historical data to identify the exposure status of individuals and then determining their health outcomes. The prospective cohort study design involves selecting individuals based on their exposure status and then following them over time to determine their health outcomes.
Uses of study designs:
Both retrospective and prospective cohort studies are useful in identifying risk factors and the development of diseases. They are also useful in investigating rare diseases and identifying trends over time. Prospective cohort studies are generally more reliable than retrospective studies because they involve following individuals over time and collecting data as events occur.
To know more about study design, visit:
https://brainly.com/question/6652240
#SPJ11
What term refers to a nerve signal moving through a nerve cell?
A.sliding filament model
B.humoral response
C.action potential
D.cell mediated
Answers
Answer:
Option C is correct ( Action potential)
Explanation:
a momentary reversal in electrical potential across a plasma membrane (as of a neuron or muscle fiber) that occurs when a cell has been activated by a stimulus.
Which part of the nephron would be most similar to a pasta strainer or a filter? The afferent arteriole The collecting duct The glomerulus The Loop of Henle Everything that enters the Bowman's Capsule will be excreted in the urine. True False
Answers
The part of the nephron that is most similar to a pasta strainer or filter is the glomerulus. This is because, like a strainer or filter, the glomerulus helps to filter substances from the blood. Blood enters the glomerulus via the afferent arteriole and is filtered through the glomerular filtration barrier, which consists of three layers: the fenestrated endothelium, the basement membrane, and the podocytes.
The fenestrated endothelium is a thin layer of cells with large pores that allow small molecules like water, glucose, and ions to pass through. The basement membrane is a thick layer of collagen and other proteins that act as a molecular filter. The podocytes are specialized cells that form a tight barrier around the capillaries of the glomerulus and prevent larger molecules like proteins and blood cells from passing through.
Therefore, the glomerulus is the part of the nephron that is most similar to a pasta strainer or filter. Everything that enters the Bowman's Capsule will not be excreted in the urine as the urine is produced after the processes of reabsorption and secretion. Therefore, the statement "everything that enters the Bowman's Capsule will be excreted in the urine" is false.
To know more about nephron visit:
https://brainly.com/question/12307837
#SPJ11
If you are going to allow a population of mice to randomly mate for 5 generations and you want to limit inbreeding to a maximum of 14.678481% after generation 5 (assuming you started with zero inbreeding), how many males do you need if you have 20 females?
a) 5
b) 10
c) 50
d) 2
e) 8
Answers
The answer is (b) 10. To limit inbreeding to a maximum of 14.678481% after 5 generations, we need to calculate the expected amount of inbreeding in each generation and then adjust the number of males to add to the population accordingly.
The expected amount of inbreeding in each generation can be calculated using the formula:
Expected inbreeding = (1 - (1/2)^(generation/2)) * (1 - (1/2)^(generation/2)^2) * ... * (1 - (1/2)^(generation/2)^(14))
Substituting the value of generation=5 gives:
Expected inbreeding = (1 - (1/2)^5) * (1 - (1/2)^5)^2 * ... * (1 - (1/2)^5)^(14)
= 0.81924005762932
The maximum amount of inbreeding allowed is 14.678481%. Substituting this value gives:
Maximum inbreeding = 14.678481 / 0.81924005762932
= 17.5937535396166
Therefore, to limit inbreeding to a maximum of 14.678481% after 5 generations, we need to add at least 17.5937535396166 males to the population.
Solving for the number of males needed if we have 20 females, we get:
17.5937535396166 = (20 * 1 - 14.678481) / 20
= 3.45344278981875
Rounding to the nearest whole number, we get:
The number of males needed is 3.
Therefore, the answer is (b) 10.
Learn more about generations Visit : brainly.com/question/5013260
#SPJ11
All ecdysozoans possess a(n) __________ which is a nonliving cover that serves both to support and protect the animal.
Answers
All ecdysozoans possess an Cuticle, which is a non-living cover that served as both to support and protecting the animal.
Cuticle is a very crucial part of organisms, as it is the part that comes into direct contact with the outer environment. The epidermis secretes the dead and non-cellular cuticle in invertebrates.
In Arthropods, pigments and chitin is contained in a layer, whereas in humans the cuticle is presents in the epidermis. In some plants, the cuticle serves as the prevention of loss of water into the plants, by covering of the epidermal cells of the leaves.
for example; apple, nectarine, and cherry, which can be buffed to a high gloss.
To know more about, ecdysozoans , click here
https://brainly.com/question/27346733
#SPJ4
Which of the following describes a virus?
A. A virus does not have a cell wall, nucleus and eats.
B. A virus has cell, a nucleus and does not eat.
C. A virus does not eat, use energy or have cells.
D. A virus does not have cell, produces carbon dioxide and uses oxygen.
Answers
The simplest virions consist of two basic components: nucleic acid (single- or double-stranded RNA or DNA) and a protein coat, the capsid, which functions as a shell to protect the viral genome from nucleases and which during infection attaches the virion to specific receptors exposed on the prospective host cell.
Answer:
A
Explanation:
A virus has no nucleus or cell wall but it eats.
what is a sound wave
Answers
Answer:
A sound wave is a vibration.
Explanation:
Can someone please help me with this
Answers
DNA replication process is the event during which the molecule duplicates. It occurs in the interphase and involved different enzymes, a DNA molecule, and free nucleotides. Image attached.
Whatis DNA replication?DNA replication is the process through which DNI molecule duplicates. This event takes place during the S stage of the interphase. So when the cell divides during mitosis or meiosis, each cell will get a complete set of chromosomes.
DNI replication is semi-conservative because each new molecule carries an original DNI strand and a new one. The fact that the new molecule is composed of an original strand makes it semi-conservative. The old existing strands are used to synthesize the new complementary strand.
The origin of the replication requires helicase enzymes to break hydrogen bonds and separate the two original strands. The topoisomerase enzyme is necessary to release tension. Other proteins are also needed to join the strains and keep them separated.
Once the molecule is opened, there is a region named replication forks. DNA polymerase makes the new nucleotides enter into the fork and pairs them with the corresponding nucleotide of the original strand. Adenine pairs timine, and cytosine pairs guanine.
DNA strands are antiparallel, and replication occurs only in 5'-3' direction. So one of the strands will replicate continuously, while the other strain will be formed by short fragments known as Okazaki fragments.
Primers are needed to make the DNA polymerase work. Primers are small units of RNA and are placed at the beginning of each new fragment.
You will find the labelled Image in the attached files.
You can learn more about the DNA replication process at
https://brainly.com/question/29398205
#SPJ1
These plants have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. There is one type of spore, and the gametophyte generation grows outside of the spore wall. Which plant or plants am I describing? (SELECT ALL THAT APPLY) 000000000 Ferns Cycads Selaginella Lycopodium Conifers Ginkgo Hornworts Mosses Angiosperms 3 pts Liverworts
Answers
The correct answers are: Ferns, Hornworts, Mosses, and Liverworts.
The plants that fit the given description are:
Ferns: Ferns have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. Ferns produce one type of spore, and the gametophyte generation grows outside of the spore wall.Horworts: Hornworts also have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. Hornworts produce one type of spore, and the gametophyte generation grows outside of the spore wall.Mosses: Mosses have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. Mosses produce one type of spore, and the gametophyte generation grows outside of the spore wall.Liverworts: Liverworts also have free-living gametophytes and free-living sporophytes. The sporophyte generation is dominant and larger than the gametophyte generation. Liverworts produce one type of spore, and the gametophyte generation grows outside of the spore wall.Therefore, the correct answers are: Ferns, Hornworts, Mosses, and Liverworts.
Learn more about Gametophytes at
brainly.com/question/26464709
#SPJ4
if a point mutation occurred so that adenine was changed to thymine in the amino acid triplet code cta, what would the resulting amino acid be?
Answers
When adenine is changed to thymine in the amino acid triplet code CTA, the resulting amino acid would be Leucine. A point mutation refers to a gene mutation that involves the modification of one nucleotide.
As a result of the alteration of the nucleotide sequence of a DNA molecule, it leads to a new sequence of nucleotides that may code for a different amino acid than the initial sequence.In the amino acid triplet code CTA, Cytosine, Thymine, and Adenine (CTA) represent the amino acid Leucine. So, when adenine is replaced with thymine, the new codon would be CTT that would still code for Leucine. Therefore, the resulting amino acid would remain Leucine, despite the point mutation.
.
Know more about Leucine here:
https://brainly.com/question/30776897
#SPJ11
the incidence rate of glioblastoma (a type of brain cancer) in the european union is about 2.5 times higher than in america. of the study designs we have discussed so far, which design gives us this information?
Answers
The study design that gives us information about the incidence rate of glioblastoma (a type of brain cancer) in the European Union being 2.5 times higher than in America is Observational Studies.
What are Observational Studies?Observational studies refer to any kind of study that involves the observation of ongoing or past behavior of groups of people or individuals without attempting to influence or modify them in any way. The following are the three different types of observational studies, namely :
Cross-sectional studies Cohort studies Case-control studies. The observational studies are broadly categorized into two categories, namely Descriptive Studies and Analytical Studies. Descriptive Studies, as the name implies, describes the outcome and exposure variables in a population.
The information on glioblastoma can be gathered through case reports or healthcare databases to determine how widespread this cancer is in different regions of the world. Through this study, researchers discovered that the incidence rate of glioblastoma in the European Union is 2.5 times higher than that in America.
To know more about epidemiological visit
https://brainly.com/question/13497485
#SPJ11
please help me with this homework question!
Answers
Answer:
Tt and tt
Explanation:
To solve this just work backwards. The first box has Tt so one parent has to have T and the other t. Since the tall plant is on the top, it is T_ and t_. Next use the second box (tt). They are both t so the final answer is Tt x tt.
HELPPPPPPPPP!!!!
why is it important for a fruit to ripen when its seeds are mature
Answers
Cortical nephrons have their corpuscles near the _________ edge of the cortex and are the ______ common type of nephron.
Answers
Answer: the first is Peripheral and the second blank is more
Explain why eating a meal with too much salt leads to production of small volume of concentrated urine.
Answers
Answer:
the urine is burned up by salt which will evaporate
Answer:
Eating a meal with too much salt leads to a decrease in the water potential of blood. This fall in water potential is detected by the osmoreceptors in the hypothalamus (in brain). The hypothalamus stimulates the pituitary gland to release antidiuretic hormone (ADH). The walls of the collecting duct in the kidney become more permeable to water, hence, a greater proportion of water is reabsorbed from the urine back into the blood by osmosis.
As a result, a small volume of concentrated urine is formed.
HELLLLLLPPPPPP
All of the following are responsibilities of members of the community EXCEPT:
A.
volunteering to help the local government
B.
participating in local government decision-making process
C.
providing political interference to support projects in their neighborhood
D.
organizing with other community members to create awareness of problems and solutions
Answers
The answer is B because the other answers are responsibilities for members of the community while B is when the community members had to participate in a local government process where they make decisions so that's why the answer is B. I hope this helps.
how many hours will it take for a motor protein to transport another molecule a distance of 1 meter?
Answers
The motor protein will take approximately 1000 hours to transport another molecule at a distance of 1 meter.
What is a motor protein? A motor protein is a type of molecule that generates movement within cells, transporting molecules from one location to another. Kinesin and dynein are examples of motor proteins that are involved in the intracellular transport of organelles, proteins, and RNA.
The steps involved in intracellular transport are as follows: The motor protein attaches to the cargo at the beginning of the transport. The protein changes its shape and moves forward along the cytoskeleton, pulling the cargo behind it. The motor protein continues to move until it reaches its destination or until the transport is stopped.
Movement can be powered by a number of different energy sources, including ATP hydrolysis, proton gradients, and light. The motor protein will take approximately 1000 hours to transport another molecule at a distance of 1 meter.
To know more about motor protein, refer here:
https://brainly.com/question/2556143#
SPJ11#