21. Choose one of the hypotheses from Question 20. Describe how you could set up an experiment to test the hypothesis by listing your experimental groups, control group, and at least 2 constants you would need to have.
this is question 2020. Identify the independent and dependent variables in the hypotheses below: (4 pts)
A. If a player practices longer, then he will score more points in the game.
B. If students eat a high-protein breakfast, then they will score higher on their biology test.
Answer:
Biologists and other scientists use the scientific method to ask questions about the natural world. The scientific method begins with an observation, which leads the scientist to ask a question. She or he then comes up with a hypothesis, a testable explanation that addresses the question.
A hypothesis isn't necessarily right. Instead, it's a "best guess," and the scientist must test it to see if it's actually correct. Scientists test hypotheses by making predictions: if hypothesis \text XXstart text, X, end text is right, then \text YYstart text, Y, end text should be true. Then, they do experiments or make observations to see if the predictions are correct. If they are, the hypothesis is supported. If they aren't, it may be time for a new hypothesis.
How are hypotheses tested?
When possible, scientists test their hypotheses using controlled experiments. A controlled experiment is a scientific test done under controlled conditions, meaning that just one (or a few) factors are changed at a time, while all others are kept constant. We'll look closely at controlled experiments in the next section.
In some cases, there is no good way to test a hypothesis using a controlled experiment (for practical or ethical reasons). In that case, a scientist may test a hypothesis by making predictions about patterns that should be seen in nature if the hypothesis is correct. Then, she or he can collect data to see if the pattern is actually there.
Controlled experiments
What are the key ingredients of a controlled experiment? To illustrate, let's consider a simple (even silly) example.
Suppose I decide to grow bean sprouts in my kitchen, near the window. I put bean seeds in a pot with soil, set them on the windowsill, and wait for them to sprout. However, after several weeks, I have no sprouts. Why not? Well...it turns out I forgot to water the seeds. So, I hypothesize that they didn't sprout due to lack of water.
To test my hypothesis, I do a controlled experiment. In this experiment, I set up two identical pots. Both contain ten bean seeds planted in the same type of soil, and both are placed in the same window. In fact, there is only one thing that I do differently to the two pots:
One pot of seeds gets watered every afternoon.
The other pot of seeds doesn't get any water at all.
After a week, nine out of ten seeds in the watered pot have sprouted, while none of the seeds in the dry pot have sprouted. It looks like the "seeds need water" hypothesis is probably correct!
Let's see how this simple example illustrates the parts of a controlled experiment.
Explanation:
Select the correct answer.
Which condition is a cause of impotency in men?
A.
undescended testicles that persist beyond puberty
B.
the inability of the penis to become erect
C.
a vasectomy, which is a surgical procedure to cut the vas deferens
D.
a low production of sperm in the testes
E.
the absence of the vas deferens in a male from birth
Is the pH of Claire's small intestine below, within, or above the optimal range of each enzymes?
Answer: Protease is within
Lipase is within
Carbohydrase is within
Explanation:
Because a pH of 9.1 is within the green area for every graph, Claire’s pH is within the optimal range for every enzyme.
Which feature forms at Earth’s surface from the cooling of lava
A swimming pool holds 2,640,000 quarts of water.
How many gallons does it hold?
Explain why meiosis is such a critical process in the inheritance traits. Be as specific as you can.
Answer:
It ensures that sexually reproduced offspring have the correct amount of chromosomes when born, this ensures that disorders such as down syndrome don't occur. It also makes genetic variation possible, by way of genetic recombination, this is so that siblings don't look exactly the same, disregarding twins.
Explanation:
Meiosis is such a critical process in the inheritance of traits, and meiosis is important because it ensures that each daughter cell receives the correct number of chromosomes from the parent cells.
What is the significance of the inheritance of traits?Inheritance of traits allows for the transfer of beneficial traits from one generation to the next, allowing populations to adapt to changing environmental conditions, and the study of inheritance of traits can provide insight into the underlying genetic causes of diseases. The understanding of the traits helps in the improvement of agriculture and in other fields of biology.
Hence, meiosis is such a critical process in the inheritance of traits, and meiosis is important because it ensures that each daughter cell receives the correct number of chromosomes from the parent cells.
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Explain Why is there a net gain of onlý two ATP
molecules in the glycolysis of one six-carbon glucose?
Answer:
While 4 molecules of ATP are produced in total, 2 were used to convert glucose to the reactive fructose-1,6-bisphosphate
Thus, 4 ATP- 2ATP= 2ATP
Explanation:
In the cytoplasm, cellular respiration starts, where glucose is broken down for energy production. in the presence of oxygen, energy is produced through aerobic respiration, while in an oxygen-deprived environment, anaerobic respiration can be carried out.
Glucose is a relatively stable molecule, thus in order for the pyruvate-producing reaction to occur, the molecule undergoes phosphorylation through the addition of high energy phosphate groups to drive the reaction forward.
Pyruvate is generated through glycolysis in the cytoplasm-it is oxidized to form acetyl CoA in aeroboc respration also used in fermentation (anaerobic respiration) as an electron acceptor.
Last question guys pls help me
Punnet squares help Fill in the Punnett square for breeding a female chocolate lab (bbEE) with a male black lab (BbEE). bE bE bE bE BE BE bE bE
Answer:
See the answer below
Explanation:
First, we need to identify the gametes that would be produced by each gene.
bbEE will produce bE, bE, bE, bE.
BbEE will produce BE, BE, bE, bE.
These gametes will then be aligned at the horizontal and vertical side of the Punnet's square to give the genotype of the offspring as shown in the attached image.
Answer:
bbEE will produce bE, bE, bE, bE.
BbEE will produce BE, BE, bE, bE.
Explanation:
how many codons equal one amino acid
Explanation:
hope the answer was helpful
Three codons equal one amino acid
CODON:
A codon is a nucleotide sequence consisting of three bases. The genetic code is read in a group of three nucleotide bases at a time, which are called codons. Each codon encodes an amino acid. For example, codon AUG encodes methionine amino acid. Each codon is read during translation to form an amino acid sequence. This means that the number of codons in a mRNA (nucleic acid) sequence determines the number of amino acids in a sequence. Therefore, three codons equal one amino acid.Learn more at: https://brainly.com/question/14136689?referrer=searchResults
when these bond together they form a proteins
Answer:
multiple aminos will link together
Abrianna placed a ball of clay on a table. She flattened it into the shape of a disc. She turned to Hanna and said, "Look, I have changed the weight of the clay!" Hanna responds, "No, the weight has not
changed. The mass has." How would you respond? Write your response in your
Science Journal.
Answer:
Explanation:
Both would be right if some of the clay was removed.
Since there is no mention of anything being removed, both are incorrect. There is always the same mass when the shape has been altered.
need rn! worth 13 ~ 謝謝
What was the health of the ecosystem of Atlas National Park like before wolves were reintroduced? *WILL GIVE BRAINLIEST*
Answer:
the populations of their prey—the deer, rabbits, and so on—may increase due to a lack of at least one natural predator.
Explanation:
Wolves are causing a trophic cascade of ecological change, including helping to increase beaver populations and bring back aspen, and vegetation. Today, nearly 25 years after wolves were reintroduced into the park, the top predators have helped parts of the ecosystem bounce back. They've significantly reduced elk herds, opening the door for willow, aspen, beaver and songbird populations to recover.
The health of the ecosystem is not good due to imbalance conditions.
The health of the ecosystem of Atlas National Park is not good before the introduction of wolves because the population of herbivore such as deer increases which leads to the destruction of all vegetation present in the park as a result the park health deteriorates.
When the wolves are introduced in the ecosystem, they controls the population of herbivores i.e. deer that feeds on the grass and the recovery of vegetation that was lost due to herbivorous animals occur so we can conclude that the health of the ecosystem of Atlas National Park is not satisfactory before wolves were reintroduced in the park.
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which statement about the continental drift theory is untrue ?
Answer:
your right
Explanation:
Answer:
number 4 or D
Explanation:
the plates still shift to this day
Has anyone done the modeling cellular division and differentiation project on edge 2020? Please share, I am behind in this class and need help please
Answer:
im doing it too its realy hard
Explanation:
Answer:
hey if you finished it can you please text me on in$tagr4m my thing is xoohaileyy and if you dont have in$t4 my sn4p is spooky.hailey0 i really need ur help
Explanation:
A scientist is sent an organism from a newly discovered island. It is made up of many cells, has specialized parts, and cell walls.
Is the organism an animal? Why or why not?
Answer:
Explanation:
No it is not an animal because animals dont have cell walls plants do animals have blood cells that are roundish kinda so it is a plant organism
Plant cells contain a large central vacuole. If the vacuole of a plant cell were damaged, which of the following would most likely occur?
The plant would be unable to produce proteins.
The plant would wilt due to loss of water within the cells.
The plant leaves would turn brown from losing pigmentation.
The plant would flourish due to its ability to store excess water
Answer:
The plant would wilt due to loss of water within the cells
Explanation:
In plant cells, vacuoles help maintain the balance of water. A single vacuole may occasionally occupy the majority of a cell's inner volume. Thus, option B is correct.
What is the major function of plant vacuole?Maintaining cell acidity and turgor pressure, controlling the storage and movement of substances, regulating the movement and localization of crucial proteins.
Via the endocytic and lysosomal-vacuolar transport pathways, and responding to biotic and abiotic stresses are just a few of the main roles of vacuoles.
A membrane-bound cell organelle known as a vacuole. Vacuoles, which are commonly seen in animal cells, help to sequester waste.
Therefore, The plant would wilt due to loss of water within the cells.
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Development and the specialization of cells happens in unicellular organisms
Question 9 options:
True
False
Which process CANNOT occur without carbon dioxide
Answer:
photosynthesis
Explanation:
:)
PLEASE HURRY!! I will give brainliest!! what is one factor of rock types that affects the rate of weathering?
O Porosity
O Moisture
O temperature
O Mineral Color
Answer:
a) Porosity
Explanation:
Porosity or void fraction is a measure of the void spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%. Strictly speaking, some tests measure the "accessible void", the total amount of void space accessible from the surface.
Which process is part of the carbon cycle?
A. Photosynthesis
B. Transpiration
C. Evaporation
D. Fixation
Hey there!
Photosynthesis is part of the carbon cycle.
Plants absorb carbon dioxide & sunlight in the middle of the photosynthesis process and create glucose (a type of sugar).
I hope this helps,
have a wonderful day. :)
Photosynthesis is part of the carbon cycle. Therefore option A is correct.
Photosynthesis is a vital process in the carbon cycle, which is the biogeochemical cycle that describes how carbon is exchanged and recycled between the atmosphere, living organisms, oceans, and the Earth's crust.
During photosynthesis, green plants, algae, and some bacteria convert carbon dioxide (CO2) from the atmosphere into organic compounds, such as glucose, using sunlight as an energy source.
This process removes CO2 from the atmosphere, reducing greenhouse gas levels and helping to regulate the Earth's climate.
It is an essential step in maintaining the balance of carbon in the biosphere and plays a significant role in sustaining life on our planet.
Therefore option A Photosynthesis is correct.
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Similarities in Aemoba and Humans
Answer:
Both Amoeba and human beings are heterotrophs and derive nutrition from other organisms. Dissimilarity: Human beings have a complex digestive system and different nutrients are digested in separate regions. Amoeba does not have a digestive system and all the nutrients are digested in the food vacuole.
a b c d ? anyone help pls
Answer:
Nucleus
Explanation:
It is the brain of the cell and controls and regulates the activities of the cell
7. Explain how magnetic potential energy can be transformed into kinetic energy.
Answer:the potential energy by the magnetic field can turn into kinetic energy once the field is moving from the S pole to the N pole when it reaches the N pole it is potential energy when it exits the S pole it is kinetic energy.
Explanation:
The magnetic potential energy can be effectively transformed into kinetic energy by that fact when it moves to the South pole of the magnet.
What is Kinetic energy?Kinetic energy may be defined as a type of energy that is possessed due to its motion. It is characterized as the work which is required in order to accelerate a body of a given mass from rest to its stated velocity.
The potential energy in the magnet can be efficiently get stored at the north pole while when it moves to the south pole of the magnet, the energy can be transformed into kinetic energy. This type of energy is possessed by the virtue of its motion.
Therefore, the magnetic potential energy can be effectively transformed into kinetic energy by that fact when it moves to the South pole of the magnet.
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How do you know that the glucose molecule is a carbohydrate?
The glaciers are visible because Ice floats when it freezes .This particularly helpful to life as it insulates the water below and is home to a variety of animals. Which is property of water is the reason that we can see icebergs float
Answer:
Water is denser as a liquid than as a solid.
Explanation:
The property of water that makes icebergs float on is due to the fact that water as a liquid is denser than as a solid.
According to the rules of floatation, a less dense substance will always float on a denser liquid because a body will always displace its own weight when placed in a liquid. At room temperature, water as a liquid has a density of 1 g/cm3 but if the same water forms ice, the density would be 0.92 g/cm3. Hence, when ice is placed on water, it will float on it.
Watson's book is credited for helping to give the public a greater appreciation for science and a better understanding of what scientists actually do.
O True
O False
Segments of DNA transferred from parent to offspring are called ______.
Answer:
segments of DNA transferred from parent to offspring are called genes
Answer:
chromosomes
Explanation:
the the chromosomes are from the father and mother's DNA 13 chromosomes are from a father and another 13 chromosomes are from the mother I hope this clears everything up for you have a good day
In mice, there are three options for fur color: black,grey and white. What type of inheritance is shown by these mice?
A. Simple
B. Co-dominance
C. Incomplete dominance
D. Sex linked inheritance
Answer:
C. Incomplete dominance
Explanation:
Incomplete dominance is a type of non-mendelian inheritance in which one allele does not completely mask the phenotypic expression of the other allele in a gene, hence, the blending of both alleles give rise to an intermediate third phenotype.
According to this question, there are three options for fur color in mice namely: black, grey and white. This is so because the alleles for black and white coloration exhibits INCOMPLETE DOMINANCE, hence, they produce a third phenotype (grey) that is a blend of both parental phenotypes.