Answers
Answer:
See the answer below
Explanation:
The control group in an experimental study is the subject group that is not administered the treatment variable. The control group forms the baseline for comparing the effects produced by the treatment variable on the experimental group.
Thus, in this case, the control group would be the 10 mice that were not exposed to the radio waves.
The independent or the manipulated variable, in this case, is the exposure or otherwise of the mice to the radio waves.
The dependent variable is the actual variable that is going to be measured, otherwise known as the effect variable. In this case, the dependent variable would be the strength of the mice measured by their ability to push the block of wood blocking their food.
Since 8 out 10 mice and 7 out of 10 mice were able to push the wooden block in both the experimental and the control group, Bart's conclusion should reject the hypothesis that the radio waves make mice extra strong.
Bart's experiment can be improved by increasing the number of subject mice in each group. The more the number of subjects, the more the accuracy of the outcome would be.
Related Questions
A geochemist examines a piece of metal that he found in the soil. He performs tests to identify the metal from its density, electrical conductivity, and melting point. Which statement best describes his investigation?
He is identifying the metal using physical properties only.
He is identifying the metal using chemical properties only.
He is identifying the metal using physical properties and chemical properties.
He is identifying the metal using neither physical properties or chemical properties.
Answers
The statement that best describes the investigation is "He is identifying the metal using physical properties only."
Density, electrical conductivity, and melting point are all physical properties of a substance. These properties can be observed and measured without changing the identity of the substance. Therefore, the geochemist is using physical properties to identify the metal.
Answer:
The answer is A!
Just took the test
Good luck y'all :D
Which component of nerve cells contains the nucleus? (1 point)
dendrite
axon
neuron
cell body
Answers
The answer is the cell body
Explanation:
The nucleus is the main control center, and the cell body is very gooey on the inside so the cell wants to protect the nucleus so we can live.
The nucleus is present in the cell body.
Nerve cell:Nerve cell is a basic unit of communication. Each nerve cell contains axon, cell body, dendrites and terminal branches. There are about 85 to 200 billion neurons present.
Neurons are surrounded by a cell membrane.Neurons have a nucleus that contains a gene.It also have cytoplasm, mitochondria and other cell organelle.Neurons are of different types:
Unipolar neuronBipolar neuronMultipolar neuronNeurons are the chemical messenger. They contain nucleus which contain genetic material. Mitochondria produces energy. Neurons contain specialized structures and chemicals. They contain some specialized structures (synapse) and chemicals called neurotransmitter.
Therefore, The nucleus is present in the cell body.
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A microorganism measures 5 μm in length. Its length in mm would be:
a) 0.05 mm.
b) 50 mm.
c) 500 mm.
d) 0.005 mm.
e) 0.5 mm.
Answers
0.005 mm. One millionth of the a metre, or micrometres, are frequently used to measure the size of microbes. Measureable traits of microorganisms include their genome sizes and growth rates, among many others.
Trillions of microorganisms, as well as "microbiomes," are present in the soil, plants, homes, the air we breathe, and on and inside of us. The large percentage of microbiomes support critical functions in our bodies and environments, including digestion and plant growth. In most cases, we can live side by side with them. With a greater understanding of these communities, we might be able using these complex microbial communities for implementations in agriculture and food safety, water purification, manufacturing, renewable energy, as well as biological threat detection.
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how long does it take to recover from appendix surgery
Answers
two to four weeks, that's what l was told by my teacher
what happens when an action potenial reaches motor end plates
Answers
When an action potential reaches motor end plates, acetylcholine (ACh) is released.
What are motor end plates? Motor end plates are a specialized type of synapse found in muscles that allows motor neurons to control muscle fibers. What is an action potential? An action potential is a rapid, temporary change in the electrical potential of a cell membrane that occurs in response to a stimulus. It is also called a neural impulse.How does an action potential reach motor end plates? An action potential is generated at the axon hillock of a motor neuron, which is then propagated along the axon towards the axon terminal. At the axon terminal, the depolarization of the membrane triggers the opening of voltage-gated calcium channels. The influx of calcium ions into the terminal causes synaptic vesicles containing acetylcholine to fuse with the presynaptic membrane and release their contents into the synaptic cleft.What happens when an action potential reaches motor end plates?When an action potential reaches the motor end plate, acetylcholine (ACh) is released into the synaptic cleft. The ACh molecules diffuse across the cleft and bind to receptors on the postsynaptic membrane of the muscle fiber. This binding opens ion channels on the postsynaptic membrane, causing sodium ions to rush into the muscle fiber and depolarize the membrane. The depolarization of the membrane triggers the contraction of the muscle fiber.
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the left side of the heart pumps oxygen-rich blood throughout the body in a process called circulation. multiple choice question. cardiovascular systemic pulmonary ventricular
Answers
The left side of the heart pumps oxygen-rich blood throughout the body in a process called circulation The correct answer is "cardiovascular".
The cardiovascular system is responsible for circulating blood throughout the body, and it consists of the heart, blood vessels, and blood. The heart is a muscular organ located in the chest, and it is responsible for pumping blood to the lungs to pick up oxygen and then pumping oxygen-rich blood to the rest of the body.
The left side of the heart receives oxygen-rich blood from the lungs and pumps it out to the rest of the body via the systemic circulation. The right side of the heart receives oxygen-poor blood from the body and pumps it to the lungs for oxygenation via the pulmonary circulation.
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If your blood contains 15 g of hemoglobin per dl of blood, how much hemoglobin would be contained in 1 liter of blood
Answers
Hemoglobin, a protein molecule found in red blood cells, is responsible for transporting oxygen and carbon dioxide. It is measured in grams per deciliter (g/dl) of blood.
If the amount of hemoglobin in the blood is 15 g/dl, what would be the quantity of hemoglobin in 1 liter of blood?There are 10 deciliters in one liter, so the calculation can be performed as follows:
15 g/dl x 10 dl/l = 150 g/lTherefore, 1 liter of blood containing 15 g of hemoglobin per deciliter (dl) of blood would contain 150 grams of hemoglobin.
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What person is in this image?
Answers
Answer:
bts petson
Explanation:
look
Can you guys help me???
Why does dna polymerase can't synthesize the ends of linear dna?
Answers
Answer:
DNA pol uses the energy provided by hydrolysis of the high-energy phosphate bond at the 5' end of the incoming nucleotide to add it to the 3' end of the growing DNA.Without the high-energy phosphate bond, the correct nucleotide can not be added.
Explanation:
What effect will boiling have on an enzyme's activity?
decreased active site due to changed shape
increased active site due to changed shape
O
less substrate due to increased product formation
o
more product due to increased molecular movement
Answers
Answer:
decreased active site due to changed shape.
Explanation:
With the rising temperature, chemical bonds between molecules of enzymes break resulting to alter the standard shape of enzymes. the active site no longer fits substrate molecules and thus the effect of enzymes decreases.
what happened at the start of the cambrian period? a. the first oxygen-producing bacteria appeared b. the first dinosaurs appeared c. early humans first appeared d. an explosion of genetic diversity appeared, leading to the appearance of the first animals
Answers
At the beginning of the Cambrian period, option (d) - an explosion of genetic diversity appeared, leading to the appearance of the first animals.
What is the Cambrian period?The Cambrian period is the first geological period of the Paleozoic Era, which occurred around 541 million years ago. It was named after Cambria, the Latin name for Wales, where rocks from this period were first studied. The period began with the appearance of diverse animal life on Earth. This is referred to as the Cambrian explosion, which saw a sudden increase in animal diversity and complexity.
What happened at the start of the Cambrian period?At the beginning of the Cambrian period, an explosion of genetic diversity appeared, leading to the appearance of the first animals. During this time, many different types of organisms evolved, including the first animals with shells, arthropods, and chordates. This event is significant because it marked the beginning of the Phanerozoic eon, which is the period of time when most of the animal life that exists today first appeared.
It is important to note that the first oxygen-producing bacteria appeared long before the Cambrian period, around 2.7 billion years ago. Similarly, the first dinosaurs did not appear until the Late Triassic period, which occurred around 230 million years ago. Finally, early humans first appeared in the Pliocene epoch, which was around 5 million years ago.
Therefore, option D: An explosion of genetic diversity appeared, leading to the appearance of the first animals is the correct answer.
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Which level has the most number of organisms but the least specific characteristics?
Answers
Answer:
Kingdom
Explanation:
Out of all the taxonomic categories, the Kingdom is the least specific, which means it has the least filters.
I like to think of taxonomic categories as filters/sieves. If you put your animals through the Kingdom filter, then all the animals are in that category. if you have a finer sieve, then less animals get through, this goes down all the way to the most specific which is Species.
Hope this helps!
macadangdang, j. et al. nanopatterned human ipsc-based model of a dystrophin-null cardiomyopathic phenotype. cell mol bioeng 8, 320–332 (2016)
Answers
The article titled "Nanopatterned Human iPSC-based Model of a Dystrophin-null Cardiomyopathic Phenotype" was authored by J. Macadangdang and his colleagues. It was published in Cell Mol Bioeng in 2016.
The article deals with a study that aimed to develop a human induced pluripotent stem cell-based model of a dystrophin-null cardiomyopathic phenotype with the help of a nano-engineering technique. The researchers were able to successfully produce an in-vitro model of dystrophin-null cardiomyopathy with the help of nano topography engineering that combined micro-contact printing with reactive-ion etching.
The study provides insight into the development of a model of dystrophin-null cardiomyopathy that could be used to develop and test potential therapies for this condition.
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dna polymerase iii ""reads"" a template strand and synthesizes a complementary strand of dna in the ________ to __________ direction
Answers
DNA polymerase III reads a template strand and synthesizes a complementary strand of DNA in the 5' to 3' direction.
DNA polymerase III is an enzyme involved in DNA replication, responsible for synthesizing a new DNA strand during the replication process. It reads a template strand, which serves as a guide, and generates a complementary strand by adding nucleotides in a specific direction. The directionality of DNA synthesis is crucial for accurate replication.
The direction in which DNA polymerase III synthesizes the new strand is referred to as the 5' to 3' direction. This means that the enzyme adds nucleotides to the growing DNA chain starting from the 5' end (where the phosphate group is attached to the 5' carbon of the sugar) and moving towards the 3' end (where the hydroxyl group is attached to the 3' carbon of the sugar). The template strand acts as a template for complementary base pairing, guiding the synthesis of the new strand.
This 5' to 3' directionality is a fundamental aspect of DNA replication. It ensures that the new DNA strand is synthesized in the correct sequence, complementary to the template strand. Additionally, DNA polymerase III can only add nucleotides to the 3' end of an existing DNA or RNA strand, requiring a primer to initiate replication. This primer provides the necessary 3' hydroxyl group for nucleotide addition.
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Science 20 points please help I think I know the answer I just want to be sure.
Explain how science uses fossil evidence paired with geologic time to support the theory of evolution. Explain
and support your answer and thinking.
Answers
Answer:
fossil geologic time
Explanation:
A pink snapdragon is crossed to a white snapdragon. What is the probability of getting a red snap dragon
Answers
Answer:
0%
Explanation:
Hope this helped! ^^
Disruptive selection for a polygenic trait results in two overlapping phenotypes. Theoretically, disruptive selection could lead to two new species forming.
● How might this happen? Can you describe how it could occur?
● How else might one species diverge into two?
Answers
Two overlapping phenotypes are produced by disruptive selection for a polygenic trait, and theoretically, disruptive selection might result in the emergence of two new species.
Both sympatric and allopatric speciation are potential outcomes here. When a population is geographically isolated, sometimes as a result of natural obstacles like rivers or mountains, allopatric speciation happens.
Geographic isolation restricts gene flow between the two populations, which can cause genetic drift and natural selection to result in the emergence of two separate species. When two species evolve from a single ancestral species while coexisting in the same region, it is known as sympatric speciation.
Disruptive selection, which favours two different phenotypes, may be to blame for this. The original population therefore divides into two separate species with differing characteristics.
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14. Infrared waves are an example of heat transfer by
A. convection
B. radiation
C. conduction
D. motion of the air
15. Which of the following is the best conductor of heat?
A. glass
B. wood
C. plastic
D. tin
16. Heat registers are usually placed near the floor because
A. cold air rises
B. cold air expands
C. hot air rises
D. hot air expands
17. The basement of a modern house is often heated using hot water that passes through plastic pipes in a concrete floor. Which form of heat transfer would best explain how the concrete is warmed?
A. conduction
B. convection
C. radiation
D. all of the above
18. Fill in the blanks for the following terms
Glass
Convection
Conduction
Kinetic energy
Potential energy
Radiation
Metal
Contact
.
a. In conduction, heat is transferred through the ________of two objects.
b. The collision of high-energy molecules of a burner results in a transfer of__________to a pot.
c. Two processes involved in making air directly above a burner feel warm are __________ and __________
d. A wax bead is placed on the end of a metal rod and another on the end of a glass rod.
The other end of each rod is placed over a flame. The wax bead that will melt first is the one on the __________rod.
19. The transfer of heat in a liquid involves which of the following?
A. radiation
B. conduction
C. convection
D. gravity
20. Which statement is true about the transfer of heat in a liquid
A. heat radiates in all directions in a liquid
B. heat is passed from one molecule to the next
C. heat flows as a circular current in the liquid
D. heat does not move in a liquid
21. Convection currents in liquids move
A. not at all
B. up at the point of the heat source, then toward the cooler water
C. down at the point of the heat source, then toward the cooler water
D. directly away from the heat source toward the cooler water
22. Which of the following statements about a land breeze is incorrect?
A. The sea loses heat more slowly than the land. The air over the sea is warmer.
B. Warm air over the sea rises.
C. Air over land is cooler. Cool air is more dense and sinks.
D. Cool air flows toward the land to replace warm air that has risen.
23. Which of the following statements about a sea breeze is correct?
A Air over land is cooler.
B. Air over the water is cooler.
C. Air over the water is less dense and sinks,
D. Air over the land is more dense and sinks.
24. When compared to a land breeze, a sea breeze is
A. warm and strong
B. cool and weak
C. warm and weak
D. cool and strong
25. The heat transfer method that causes land and sea breezes is
A. radiation
B. conduction
C. convection
D. concentration
26. Fill in the blanks. Select the appropriate words from the following list. Words may be used
Heats
Flows toward
Cooler
Sinks
Rises
warmer
a. The air in a sea breeze __________ over the land and __________over the water.
b. The air in a land breeze __________ over the land and __________over the water.
27. Which pot would transfer heat the best?
A. a clay pot
B. a glass pot
C. a stainless steel pot
D. a steel pot with a copper bottom
28. The type of heat transfer that allows a pot of soup to heat evenly is
A. conduction
B. convection
C. radiation
D. conductivity
29. The method by which a vehicle radiator is cooled is
A. air rushing through the radiator
B. coolant flowing to the radiator
C. coolant flowing away from the radiator
D. all of the above
30. When a refrigerator is running, the pipes at the back feel hot because
A. the refrigerator is too close to the wall
B. the refrigerator has a mechanical problem
C. the pipes have absorbed heat from the surrounding air in the room
D. the pipes have absorbed the heat that has been transferred from the food inside
31. In a refrigerator, which is the last place heat from food transfers to?
A. fins or wires
B. coolant in the pipes
C. air inside the refrigerator
D. air outside the refrigerator
Answers
Answer:
so long coorrect answer is b i think so
Dr. Wicked administers a toxin that causes a synthesized protein to be improperly packaged and incorrectly delivered to the wrong destination by this cell.
Which labeled structure is the most likely target of the toxin causing this issue in the cell?
Choose 1 answer:
(Choice A)
Structure A
(Choice B)
Structure B
(Choice C)
Structure C
(Choice D)
None of these labeled structures would be a target of this toxin.
Answers
Answer:
It's Choice C.) Structure C
Explanation:
Trust me
The best target of toxin to cause improper packaging and targeting is Golgi body.
Packaging and Targeting of protein:
Protein is transported to Endoplasmic reticulum. ER vesicles fuse with Golgi body. In Golgy body protein's post transnational modification occur.Therefore the best target of toxin to cause improper packaging and targeting is Golgi body.
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About how long ago did our solar system start to form?
About 5 million years ago
About 14 million years ago
About 5 billion years ago
About 14 billion years ago
Answers
Answer:
About 5 billion years ago
Sorry:
Sorry this is so late.
Answer:
C. 5 billion years ago
Explanation:
The real answer is about 4.6 billion years ago but that rounds up to 5 billion years.
Please:
May I please have Brainliest?
When an experiment is repeated and the new results are different from the original results, what could you assume to be true?
Answers
The original experiment may be inaccurate and further experimentation is needed.
The accuracy of measurements depends on the quality of the measuring equipment and the skill of the scientists involved. For the data to be considered reliable the variability of the values should be small. Repeated scientific research increases credibility. Results may change over the course of different studies or under different conditions.
It is therefore important that the experiment itself is reproducible. A reproducible experiment should but need not give the same results when performed by different people at different times and preferably under similar conditions. Repeating an experiment multiple times can help determine whether the data are random or normal. Avoid jumping to conclusions without sufficient evidence.
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Scientists can find new discoveries that change their current understanding of scientific knowledge.
Answers
Answer:
Change is the only thing that is constant in this world. Obviously, more discoveries would be made in the nearest future that will give their thought about science a new direction.
Explanation:
8-11. In the table below, state the role in the menstrual cycle of the following hormones; FSH,
LH, estrogen, and progesterone.
Hormone
8. FSH
9. LH
10. Estrogen
11. Progesterone
Role in the Menstrual Cycle
Answers
FSH stimulates follicle growth, LH triggers ovulation, estrogen thickens the uterine lining, and progesterone maintains the uterine lining for a potential pregnancy.
What is the role of hormones in menstrual cycle?These are the roles of hormones:
FSH (Follicle Stimulating Hormone): FSH stimulates the growth and maturation of follicles in the ovaries, leading to the release of an egg.LH (Luteinizing Hormone): LH triggers the release of the egg from the ovary, known as ovulation, and also stimulates the formation of the corpus luteum.Estrogen: Estrogen helps regulate the menstrual cycle and prepares the lining of the uterus for pregnancy by promoting endometrial growth and blood flow.Progesterone: Progesterone helps regulate the menstrual cycle and supports pregnancy by thickening the endometrial lining and maintaining its blood supply, creating a nurturing environment for a fertilized egg. If pregnancy does not occur, the production of progesterone decreases, causing the endometrial lining to shed, leading to menstruation.Learn more about menstrual cycle, here:
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a group of the same kind of organism that live in the same area at the same time
Answers
What are some examples of traits?
Answers
Answer:
Character Traits List & Examples
Honest.
Brave.
Compassionate.
Leader.
Courageous.
Unselfish.
Loyal.
Answer:
Their could be traits such as the ones like features of your body. Or how you feel!!! So you could have brown hair. You could be bored. You could have a mustache.
Biologically speaking what is the only purpose of reproduction
Answers
Answer: To prevent extinction
Explanation: This is to say the main purpose of reproduction is for the continuation of species.
HELP!!! 3 SENTENCES PLEASE!!!
how is the structure of DNA significant in the transfer of information?
Answers
Long structures called chromosomes. Are made up of thousands of shorter segments of DNA, called genes.
The wing of a bat and the arm of a human have similar bone structures but are used for different functions; these are called
Answers
Answer:
Homologous structures
Explanation:
Homologous structures refers to structural elements or organs in animals that are similar together or have similar features and indicate their connection to the same ancestry origins but the structures serve different functions in the animals. An example is what was listed above.
human chorionic gonadotropin helps to maintain the corpus luteum for the entire gestational period. t/f
Answers
Human chorionic gonadotropin is mostly produced by the syncytiotrophoblastic cells of the placenta during pregnancy. In the corpus luteum, the hormone stimulates the generation of progesterone.
What function does the corpus luteum serve?
The corpus luteum's function is to make your uterus a healthy environment for a fetus to develop, even though it is located inside your ovaries. It causes the production of the progesterone hormone, which gets your uterus ready for conception. Your corpus luteum disappears once it is no longer required for the production of progesterone.
What transpires to the corpus luteum in the absence of pregnancy?
If the egg is not fertilized, the corpus luteum undergoes its alternative fate. After ceasing to secrete progesterone, it will deteriorate and become a corpus albicans. This degradation typically takes place around
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what factors are examined by the field of demography? check all that apply.
Answers
Answer:
Demography is the statistical study of human populations. Demography examines the size, structure, and movements of populations over space and time. It uses methods from history, economics, anthropology, sociology, and other fields.