Answer:
a. independent variable: the fertilizer.
treatments: the use of fertilizer in one of the fields.
b. dependent variable: the crop growth in height.
units: meters
c. two controlled variables: soil pH / solar-radiation exposure, and water supply
d. hypothesis: the fertilizer makes the crops grow bigger.
e. two sources of error in the first year:
the researcher might plant the two crops under different conditionstake wrong measures of the height of the cornsf. two sources of error in the second year:
she can fail in irrigating the crops climatic and environmental conditions might change and have different consequences on each of the fields (this source affects the results influencing the growth of the plants).Explanation:
Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. These changes allow analyzing its effects on the dependent variable. Usually, the independent variable is represented by the X letter. In the exposed example, the fertilizer is the independent variable. Treatments: Refers to the experimental procedure applied in the experimental group. In this example, the use of fertilizer is the treatment. Here the experimental group (the one that receives the experimental procedure, with changes in the independent variable) is the fertilized field. Data from the experimental group is compared with the data from the control group, to analyze the effects of the fertilizer.Dependent variable: The values of these variables respond to any change in the independent variable. It represents the quantity of something. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. It is usually identified by the letter Y. In the exposed example, the crop growth rate in height is the dependent variable, that depends on the fertilizer used in that field. The units in which the crop is measured are meters in height. Controlled variable: Refers to those variables equally applied to every group or subject in an experiment and have no influence on the results. These variables do not affect the change in the dependent variable values. In the exposed example, soil pH and solar-radiation exposure can be two controlled variables, as they must be equal for both fields. Water supply by irrigation ducts during the second year in both fields is also a controlled variable. Hypothesis: A hypothesis is a possible answer for a question, a speculation that is not verified yet and requires corroboration. A hypothesis must express what is expected to occur in a perfectly comprehensive manner. It must be objective and directly related to variables. In this example, the hypothesis might be that the fertilizer makes the crops grow bigger. Errors: These are the differences between the observed data or taken values and what is really happening in nature, which can lead to a misinterpretation of what is actually going on. These errors might be systematic mistakes performed by the researcher when measuring, taking data, applying the treatment, etc. Or they might be due to random errors, which are due to failures in the instrumentals, changes in the environment, a single mistake of the researcher while taking measures, among others. During the first year, the researcher might plant the two crops under different conditions (parcels with different slopes which affect solar-radiation) or might commit a mistake while applying the fertilizer (different concentrations for example), or might take wrong measures of the height of the corns. During the second year, she can fail in irrigating the crops correctly, providing more water to one of the fields. She can commit the same measuring mistakes. Or even climatic and environmental conditions might change and have different consequences on each of the fields.Vincent is considering buying a creatine supplement after he saw a variety of these ergogenic aids advertised in a fitness magazine. Which of
the following is a common deceptive marketing tactic that he should watch out for?
A. an offer for a free mail-order anabolic assessment
B. a recommendation to assess body composition through underwater weighing
C.evidence about creatine's effect on resistance exercise and sprinting
D. a warning about creatine's short-term side effects
Answer:
A
Explanation:
the answer to this question is A
For considering buying a creatine supplement after he saw a variety of these ergogenic aids advertised in a fitness magazine here the exceptional things should be left out and one should focus on his own body. The correct answer is option A.
What is anabolic reaction ?It is defined as the sum of all the reactions that are taking place inside the body that are dealing with the formation of products in itself.
The marketing tactic that is dealing with the free of cost along with that winning customers' trust and the response of the customers in order to prove trust and faith in the product thus here in this process the person should opt totally for an offer for a free mail-order anabolic assessment.
Giving any kind of scientific information about the product would lead to certain problems and the issues in claiming any kind kind of medical knowledge thus this is the helpful option for this.
Learn more about anabolism at :
https://brainly.com/question/29461502
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How does carbon dioxide leave the atmosphere?
choose the correct one, please
Answer:
I believe it is called mitosis
Explanation:
What common antiseptic is obtained
from seaweed?
Answer: iodine
Explanation:
What types of cells carry out photosynthesis?
Plant
Animal
Yeast
All of the above
On the cellular level, the reactions for photosynthesis occur in organelles called chloroplasts (in eukaryotic cells). Blue-green algae (which are prokaryotic) carry-out the photosythesis reactions in the cytoplasm.
So all of the above
In poultry, two genes R and P, control the shape of the comb on the head. The following genotype/phenotype relationship applies to the two genes and the phenotype: R- P- animals have a 'walnut' comb, R- pp animals have a 'rose' comb, rr P- animals have a 'pea' comb, and rr pp animals have a 'single' comb. What will the comb phenotypes be for the progeny of the cross RR Pp x rr Pp
Answer:
sssssssssssszdawe
Explanation:
what is a solution biology
Answer:
A homogeneous mixture made of two or more substances.
A solution is a homogeneous mixture of solvent and solute molecules. The solute then diffuses through the solvent until the concentration is equal in all parts of the solution. ... A solution can be liquid, solid, or gaseous. Further, a solution can be a mixture of liquids, gases and solids.
Explanation:
what type of bond is formed when oxygen combines with hydrogen to form water
Answer:
water is a covalent compound consisting of hydrogen and oxygen . it contains Single covalent bond
During the Human Genome Project, scientists learned that most of the human genomes
A. does not code for proteins
B. is located on sex chromosomes
C. is not inherited
D. codes for proteins
Answer:
a
Explanation:
does not code for proteins (
juss guessed)
HELP :(
Where can magma be found on the surface of the earth?
○ In active volcanoes
○ Underneath lakes and rivers
○ In between all continental plates
○ In the aftermath of an earthquake
Hii!! The correct answer is A. In active volcanoes. (:
A _______ error occurs when sister chromatids fail to separate properly during meiosis.
nondisjunction happens
Explanation:
The loss of a single chromosome from a diploid genome is called monosomy while the gain of one chromosome is called trisomy
Which of the following descriptions is quantitative?
A. Blue flame
B. Long, winding road
C. Rough texture
D. 52°Fahrenheit
Where do the thickest deposits of terrigenous sediment typically form?
A. deep-ocean trenches, such as the Mariana Trench
B. mid-ocean ridges
C. abyssal plains
D. continental margins near the mouths of rivers
Answer: D. continental margins near the mouths of rivers
Explanation:
Terrigenous sediments are those that are formed via processes on land as opposed to in water. They result mostly from the erosion of rocks and yet make up 20% of all ocean sediments.
Continental margins near the mouths of rivers contain the thickest deposits of this sediments as they are closest to land which is the source. It is made more convenient by the presence of rivers bringing the sediments to them when the rocks are eroded.
The leave of a plant fold inward when it touched as a way to defend themselves from potential harm. What kind of response do the leaves demonstrate.
Answer:
thigmonasty response
i might be wrong but im not sure
Explanation:
Answer: A. Nastic response
Match the reactants to their source. Help please
Answer:
Carbon: Soil. - Water: Atmosphere. I don't really know this, sorry if it's wrong.
What molecule is the carbon input from carbon dioxide incorporated into during photosynthesis?
Water
Oxygen
hydrogen
Glucose
Answer:
Glucose
Explanation:
gizmos Student Exploration: Photosynthesis Lab answer key pleaseeeee
Use the two drawings of cell to answer the question that follows.
Which of the following best describes the cell shown?
A. The cells are from the same organism
B.One cell is from a plant and one from an animal.
c. The cell are from different types of animals
D.The cells are from different types of plants
Answer:
D
Explanation:
The cells are from different types of plants
in prokaryotes ribisomes are found in?
Answer:
the cell
Explanation:
Answer:
The cell
Hope I helped
What is meant by the term "density"? Please provide an example of how
density is determined in air masses.
Answer:
1) density "the degree of compactness of a substance."
2) air masses "More dense, or “heavier” air will slow down objects moving through it more because the object has to, in effect, shove aside more or heavier molecules. Such air resistance is called “drag,” which increases with air density."
Explanation:
BRAINLIEST? plz
In 1929, Edwin Hubble observed the velocity at which galaxies were moving away from the Milky Way. The graph below shows the relationship between this velocity and the distance those galaxies were from the Milky Way.
What conclusion can be drawn from Hubble’s data?
Objects that are closer are moving slower, suggesting that the Universe is shrinking.
Objects that are closer are moving faster, suggesting that the Universe is expanding.
Objects that are farther away are moving faster, suggesting that the Universe is shrinking.
Objects that are farther away are moving faster, suggesting that the Universe is expanding.
Answer:
Answer is a
Explanation:
A. lozxzxzl stxzop chxzxzeating oxzn testzs lmaxxo
Answer:D
Objects that are father away are moving faster,suggesting that the Universe is expanding .
Explanation:I took an test on this it’s right
Need some quick help with this:
Answer:
Explanation:
D
Answer:
option C
Explanation:
cellular respiration is the correct answer of this question.
plz mark my answer as brainlist plzzzz.
hope this will be helpful to you.
Type B blood has type B markers on red blood cells, .......... antibodies in the plasma, and can donate blood to types........
The first select
anti-AB
anti-B
anti-A
anti-O
The second select
AB or O
B or AB
A or O
A or B
Answer and I will give you brainiliest
Answer:
Anti b
Explanation:
Which of the following is true of conifers?
Answer:
Explanation:
option b is true.
most coniferous trees have both male and female cones.
Answer:
The gametophytes grow directly from the sporophyte
Explanation:
I got it right on the test:)
Select the correct answer.
Which of these activities increases the amount of carbon in the atmosphere?
NEED ANSWERED NOW
what direction should the windows face on a passive solar house?
Answer:
Based on the movements of the sun, passive solar buildings typically have windows on the southern facing side of the property to better absorb the sun's heat energy and more easily warm the space in the Winter.
Explanation:
hope this helps have a good rest of your night :) ❤
Answer:
hi! this is just your daily reminder that you can do everything you put yourself to do no cap!!! :)
ps. your supperrr smart ÷ D
Which statement describes a function of the female reproductive system
Answer:
The answer is B
the ovaries produces the egg
Explanation:
Describe how epinephrine has different effects in different target tissues
Answer:
Epinephrine binds to receptors on some smooth muscles (ex: around arterioles) → Ca++ released from ER → intracellular Ca++ up → stimulates contraction. c. Epinephrine binds to receptors on some smooth muscles (ex: around bronchioles) → phosphorylates protein needed for response to Ca++, preventing response.
Sun burning can be seen as: a. the failure of an adaptation when normal (historical) environmental variation is exceeded. b. a misfiring of the mRNA system in cases where the ribosome is damaged. c. an adaptive response to avoid skin cancer. d. a result of too much vitamin D e. none of the above is correct
Answer: The correct option is E.
none of the above is correct
Explanation:
This is because sun burning refer to the over exposure of the skin to Ultraviolet radiations of the sun. It is as a result of too much exposure if the genetic content if the skin cells to Ultraviolet radiations of the sun and the symptoms include skin redness, the skin become swollen and sometimes wrinkled.
Agriculture has only a positive impact on the land.
True or False?
False; Agriculture can negatively impact the environment when fertilizer enters the water, contaminating it. Agriculture can also lead to deforestation, the lack of trees will lead to erosion.