Answer:
Please find the explanation below
Explanation:
The control variable of an experiment or constant are variables that the experimenter keeps constant or unchanged for all the groups throughout the experiment. The constant can influence the result of the experiment if not kept unchanged.
On the other hand, a control group is a group that does not receive any experimental treatment in order to compare the effect of the independent variable on the dependent variable. The control group receives every other thing including the constants, with the exception of the independent variable.
In a nutshell, the control group is used as a standard comparison for the experiment performed i.e. compare what will happen if an independent variable is changed in the experimental group while the control variable is simply a factor that must be kept constant throughout the experiment to avoid alterations.
What are immortal cell lines and why are they important for cell research? (APEX diversity in science ws)
what are the essental parts of a flowers give
example,
Answer:
Please read this then you will know your excact ans
Exploring sounds around us, measurement and recording of this- how is it done?
Answer:
In order to measure and record sound accurately and scientifically, a sound device called Decibel Meter or a Sound Pressure Level (SPL) Meter is often required.
Other names for the SPL Meter are:
Noise Meter Noise Dosimeter and Sound Level Meter.How it works/How it is done
Sounds are collected by the Noise Meter and recorded in units called Decibels (dB). For instance, you have a recording of 0 decibels when it's extremely quiet or 30 decibels if it's a typical quiet rural area.
A motorcycle or a boom box will emit anywhere between 95 to 102 decibels.
The input mechanism for an SPL Meter is a microphone. The microphone captures the sounds, feeds it into the SPL Meter which computes how many decibels the sound it. The results are then displayed on its screen.
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Species diversity: is not predictable relative to how close an ecosystem is to the equator. decreases as you move away from the equator in both terrestrial and marine ecosystems. increases as you move away from the equator in both terrestrial and marine ecosystems. decreases as you move away from the equator in marine ecosystems, but increases as you move away from the equator in terrestrial ecosystems. decreases as you move away from the equator in terrestrial ecosystems, but increases as you move away from the equator in marine ecosystems.
Answer:
A. decreases as you move away from the equator in both terrestrial and marine ecosystems.
Explanation:
Most of the population of animals in both terrestrial and marine ecosystems lives near the equator because temperature is favorable and there is more food available in the form of producer (plants). When we go away from the equator towards poles, the temperature decreases and also food is unavailable in large quantity so the population of organisms decreases in both terrestrial and marine ecosystems.
Answer:
it's A.
Explanation:
How has the earth changed over time? 50POINTS ANSWER FAST!! :)
Which vein drains blood from the left side of the thorax and esophagus into the left brachiocephalic vein
Answer:
hemiazygous vein must be the answer
When the inspiratory muscles relax, the rib cage returns to its original position as a result of:__________.
a) gravity.
b) exhalation.
c) elastic rebound.
d) partial pressure difference.
e) accessory muscle contraction.
Answer:
The correct answer is c) elastic rebound.
Explanation:
When the muscles are relaxed (end of expiration) the lung and the chest wall act in opposite directions, the lung tries to reduce its volume due to the inward retraction of the alveolar walls and the chest wall tends to increase in volume due to elastic expansion, these opposing pressures are responsible for keeping the alveolus partially open (functional residual capacity). The muscles of inspiration act by increasing the volume of the thoracic cavity causing the intrapleural pressure to become lower (Boyle's law), the intraalveolar volume increases and then the intralveolar pressure decreases below atmospheric (negative) and flow is generated towards the lung expanding it, that is, during inspiration, the diaphragm contracts moving downward, allowing the rib cage to widen and air into the lungs.
The two main classes of skeletal muscle relaxants are
peripheral acting, centrally acting
O CNS acting, PNS acting
autonomic acting, sympathetic acting
O direct acting, centrally acting
CNS acting, PNS acting
autonomic acting, sympathetic acting
The right atrioventricular valve (tricuspid) regulates the opening between the _________ and the _________.
Answer:
The right atrioventricular valve (tricuspid) regulates the opening between the right atrium and the right ventricle.
Explanation:
Valves are gates that allow the connection between atria and ventricles. The two valves located on the right side (tricuspid and pulmonary) direct the incoming blood from the body to the lung, where it is oxygenated; from there it returns to the left atrium, to later pass through the mitral and aortic valves. The left atrium connects to the left ventricle through the mitral valve and the right atrium connects to the right ventricle through the tricuspid valve.
what is the thermoregulatory center of the brain
Answer:
Your hypothalamus is a section of your brain that controls thermoregulation. When it senses your internal temperature becoming too low or high, it sends signals to your muscles, organs, glands, and nervous system.
what is weaning as used in animals production?
Answer:
sheeps are rear for there woll.
that is way this is included
when plents use sunlight to make food, the energy of sunlight is
Answer:
your answer would be transformed.
This is a high school Biology class taught by teacher Ellen Quigley. The students will soon be taking the state End of Course Biology exam. Notice the word chart on the bulletin board with vocabulary specific to Biology. What other information is posted in the room and/or on the white board
Answer:
Please see below
Explanation:
The white board displays helpful info with regards to a QR scanner associated with the day's lesson plan. The shelves on the far end of the classroom holds up relevant books and other objects that will prove educational for the students. Some schedules have been put up too for the ease of the students.
Soil PH measure of the acid content of the soil
Answer:
Soil pH is a measure of the acidity or alkalinity of the soil. A pH value is actually a measure of hydrogen ion concentration. Because hydrogen ion concentration varies over a wide range, a logarithmic scale (pH) is used: for a pH decrease of 1, the acidity increases by a factor of 10.
A cardiac muscle cell is: A. a voluntary muscle just like skeletal muscle. B. contracts spontaneously. C. is joined to other cardiac muscle cells by structures called intercalated discs. D. has numerous nuclei. E. Two of the statements above are correct
Answer:
E. Two of the statements above are correct i.e. options B and C
Explanation:
Cardiac muscles, also known as myocardium, are one of the three types of muscles found in the heart (the other two being skeletal and smooth muscles). Cardiac muscle cells are striated and branched in structure, with only one nucleus located centrally i.e. mono-nucleated.
Unlike the skeletal muscles, cardiac muscles are involuntary muscles controlled by certain parts of the brain. The cells that make up the cardiac muscles are connected to one another by structures called intercalated discs. Also, cardiac muscle cells contract spontaneously i.e. internally. Hence, options B and C are correct
Joe has been diagnosed with major depressive disorder. He interprets negative stressful events using a pessimistic explanatory style. This explanatory style creates a hopeless, depressed state, which then hampers the way he thinks and acts, causing more negative stressful events. Joe's depression is thus, at least in part, due to:
state-dependent memory.
rumination.
a biochemical imbalance.
indicators of depression.
Answer:
Vicious cycle, state dependent memory rumination.
Explanation:
It is state dependent memory rumination and it is due to vicious circle because vicious circle refers to a situation or events that lead to difficulties or problem and the difficulties also lead to another difficulties and these continue on and on or it continue to repeat itself. Joe's negative disorder create the problem of negative stressful interpretation, which then lead to more depressive state and affect the way he think and acts.
It is state dependent memory rumination because Joe interpret negative stressful events based on how his mindset ruminate and process information.
observation and inferences are important in science.How would you explain the difference between the two words?
Directions: Identify the differences between a fresh cut and a healed cut in the fruit.
Answer: browning
Explanation: a healed cut will have brown around it, a fresh cut will not have brown
Which of the following intake forms is necessary to ensure no prior medical concerns for a client?
A. Liability waiver
B. Comprehensive client form
C. PAR-Q
D. Recovery assessment
Answer:
C. PAR-Q
Explanation:
PAR-Q is an acronym for Physical Activity Readiness Questionnaire. It is a form containing questions relating to the health status of a client that is about to undergo fitness training. The PAR-Q is one of the intake forms (infact one of the most important) required by a client to fill before starting the physical/fitness training.
The PAR-Q is used to assess a client's health state in order to make a decision on whether or not the fitness training will be commenced. It is the intake form necessary to ensure that there are no prior medical concerns for a client. If there are, the training might be suspended till medical advice is sought.
Is the study of matter and energy complete
Answer:
Not yet because there are many mysteries about energy such as dark matter, dark energy
Explanation:
In what ways might a scientist communicate with the wider community in a scientific inquiry
Using things such as the internet. For example, if a scientist wanted feedback, he could turn to an org of other scientists across the globe and get their help.
Answer:
Explanation:
Scientists often communicate their research results in three general ways. One is to publish their results in peer-reviewed journals that can be ready by other scientists. Two is to present their results at national and international conferences where other scientists can listen to presentations
In physics a players natural resistance to an unbalanced force is called?
Answer:
if a players natural resistance to an unbalanced force is called unbalanced force
In studies about new medicines, researchers usually
give one group of patients the medicine that is
designed to treat an illness. They give another group of
patients a placebo, which is taken the same way as
the medicine but does not actually contain the
ingredients of any medicine. Different medicines are
tested in different experiments, but the placebos
usually contain the same non-medical ingredients. I
both groups of patients are healed, then researchers
cannot be sure whether the medicine caused
improvement, but if the group given the medicine is
healed while the group given the placebo remains ill,
researchers can conclude that the medicine causes
the illness to go away.
In medical experiments, which group receives
placebos?
the experimental group
the control group
both the experimental and control groups
neither the experimental nor control group
Answer:
The control group
Explanation:
Answer:
The control group
Explanation:
What chemical force must be overcome in order to separate the two DNA strands during replication?
Answer:
Hydrogen bonds
Explanation:
DNA strands are held together by pair of complementary base pairs with Purines; Adenine and Guanine pairing with Pyrimidine: cytosine and Thymine;therefore Adenine pairs with Thymine,and Cytosine with Guanine.Theses bases are held together by the hydrogen bonds.
Two hydrogen bonds are in A-T, and three between C-G.
The process of formation of another DNA molecules from the parent template is called replication. Under this process the parent double DNA strands unwinds,and fresh nucleotide line on the parent strands serving as the template.
Thus new double DNA stands are formed with one back bone of alternate sugar and phosphate containing the new DNA strands,while the other strands conserving the parents strands contains the old back bone of sugars alternated with phosphate.This is semi conservative replication because, one of the double stands is new and the other is from the original parent strand.
Other form of replication is called conservative replication in which an entirely new double strands is formed,different from the parent DNA.
It begins with the the unwinding of the DNA strands by the activity of enzyme Helicase which breaks down the hydrogen bonds between bases.This is followed by attachment of primer to the old strands, and the catalysis by Enzyme DNA polymerase which ensure that new nucleotide are attach in 3'-5' direction to form a new strands.
How does your footprint compare to the average? How do you think the calculator's accuracy could be improved?
when scientists have made many observations and collected existing data, they suggest a possible explanation for what they have seen and recorded. this explanation, called a hypothesis, is a statement that both explains their observations and data and can be tested. hypothesizing is a very important step in scientific investigations. a statement is testable if evidence can be collected that either supports or disproves it. a hypothesis may be shown to be wrong, but it can never be proved true beyond all doubt. it can only be supported by evidence. at any time, new data might indicate that a previously accepted hypothesis does not hold true in all instances. scientists often must refine and revise their original hypotheses—or even discard them—as they uncover new evidence. to test a hypothesis, scientists make a prediction that logically follows from the hypothesis. a prediction is a statement made in advance that states the results that will be obtained from testing a hypothesis, if the hypothesis is true. a prediction most often takes the form of an “if-then” statement. a hypothesis is often tested by carrying out an experiment. experimenting is the process of testing a hypothesis and its predictions by gathering data under controlled conditions.
Question
1- What key vocabulary terms are contained in this passage?
2- give the meaning of these terms.
The chapter gives definitions for essential terminology used in scientific inquiry, such as hypothesis, testable, evidence, revision, prediction, and experiment, as well as information on their relevance.
What might possibly account for an observation that can be verified by science?A hypothesis is a speculative explanation that can be verified by more research. A hypothesis is a well-supported explanation for the findings.
What is an observation's hypothesis?After making an observation, a scientist tries to explain what they have noticed. An explanation for an observation is a hypothesis. Always take into account at least one alternative. The alternative theory postulates that a certain cause leads to a particular effect.
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What two commandments from god can we obey by a biblical approach to science
Answer:
Here are some. I discovered that the clean and unclean food and hygiene laws found in the Book of Leviticus have been based all this time on the God of Abraham's working knowledge of the germ theory of disease and the modern human body and other advanced fields of science unknown to mankind at that time and some fields of science still unknown to mankind today. These laws and instructions still apply to modern times for all humans to follow to help keep our bodies healthy and disease free until we grow old and die of old age.
Hope It Helps:)
Armed with the results of the seedling study above, which tool would you use to evaluate the claim that the treatment has no effect on the average weight of the resulting plants? Group of answer choices
Answer:
See the answer below
Explanation:
It may seem that the options have been omitted in this question. However, in order to evaluate the claim that a mean from a particular group is statistically higher or lower to a mean from another group, there would be a need to compare the two means.
Mean comparison or testing for a significant difference between means can be carried out using the Student's t-test or one-way Analysis of Variance (ANOVA).
When the means being compared are just for 2 groups as indicated in the illustration, Student's t-test and one-way ANOVA can be used. However, once there are more than 2 group means being compared, one-way ANOVA will only be applicable.
The space between leaves on a stem is called
The movement of water is able to transport minerals and nutrients. Which statement best explain why water is able to do this? A- water is a liquid at room temperature.b- water has a density of one gram per milliliter.c- water absorb heat energy. D- water is an excellent solvent
Answer:
D
Explanation:
water is known as a universal solvent. having the ability and capability to dissolve universal components .