Letha is researching the effects of temperature on the metabolism of yeast. she
sets up her experiment and carefully adds sugar and yeast to a beaker of water.
letha then measures and records the volume of gas produced by the mixture.
which variables should be the constants in her experiment?
mass of yeast and mass of sugar
mass of sugar and water temperature
volume of gas and water temperature
volume of gas and mass of yeast
Answers
In Letha's experiment, the constants should be the mass of yeast and mass of sugar. This is because she wants to study the effect of temperature on yeast metabolism, and keeping the mass of yeast and sugar constant will ensure that any changes observed in the volume of gas produced are due to temperature changes, not variations in the amounts of reactants.
In Letha's experiment on the effects of temperature on the metabolism of yeast, the variables that should be constants are the mass of yeast and mass of sugar.
How to Calculate mass of sugar ?
Calculate the formula unit mass of sugar ( C ₁₂H ₂₂ O ₁₁ ). Hint: The key to finding out the formula mass of any given compound is to multiply the atomic mass to the count of each atom that is there in the formula. By utilizing the atomic masses, we can compute the formula mass for every ionic compound.
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Related Questions
Systems of classification show which organisms share more recent ancestors.
What is the most accurate system of classification?
A using anatomy
B using DNA base sequences
C using morphology
D using a pedigree diagram
Answers
Answer:
I think B will be more accurate as far as I know
DNA sequences, for instance, may be used by scientists to evaluate if they have found a new species, hence option B is correct.
How DNA is used in the system of classification?In order to determine whether two species are related closely or distantly, scientists may also compare DNA sequences from other creatures and count the number of changes (mutations) between them.
DNA is helpful in phylogeny because of evolution and in this way. Scientists can now see how closely related plants and animals are to one another genetically thanks to DNA sequencing.
Now, it's possible to compare or contrast organisms based on their DNA rather than just their outward characteristics.
Therefore, using DNA base sequences is the most accurate system of classification.
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Energy is released when:
A. Chemical bonds break
B. Chemical bonds are made
C. Both A and B are true
D. Neither A nor B are true
Answers
Specialized Cells and tissues
TA
What is the function of muscle tissue?
O A. To contract to cause movement in the body
OB. To cover the body to protect other cells
C. To transport materials and defend the body
O D. To send signals to control the body
Answers
A to contract to cause movement in the body
The results of the Hershey and Chase experiments suggested that DNA was the genetic material because ______. Multiple choice question. radioactive bacteriophage DNA was found in the cytoplasm of bacterial cells radioactive bacterial DNA was found in the cytoplasm of bacterial cells radioactive bacterial RNA was found in the cytoplasm of bacterial cells radioactive bacteriophage RNA was found in the cytoplasm of bacterial cells
Answers
Answer: radioactive bacteriophage DNA was found in the cytoplasm of bacterial cells
The results of the Hershey and Chase experiments suggested that DNA was the genetic material because radioactive bacteriophage DNA was found in the cytoplasm of bacterial cells.
Hershey and Chase showed that DNA (instead of proteins) is the hereditary material that carries the information required to synthesize all materials required by the cells of organisms.Hershey and Chase marked bacteriophages by using radioactive isotopes of both phosphorus (present in nucleotides, DNA) and sulfur (present in amino acids, proteins) in those phages.They observed in the offspring bacteria that phage DNA (marked with phosphorous) was present in the bacterial cells while phage proteins were not, thereby concluding DNA is the genetic (hereditary) material.In conclusion, the results of the Hershey and Chase experiments suggested that DNA was the genetic material because radioactive bacteriophage DNA was found in the cytoplasm of bacterial cells.
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substances that are naturally produced by certain microorganisms that can inhibit or destroy other microorganisms are called question 1 options: synthetic drugs. narrow-spectrum drugs. semisynthetic drugs. broad-spectrum drugs. antibiotics.
Answers
Substances that are naturally produced by certain microorganisms that can inhibit or destroy other microorganisms are called e. antibiotics
Antibacterial medications known as antibiotics are used to either kill or stop the development of germs. Penicillin was the first antibiotic to be found, and it was made by Alexander Fleming in the year 1928. Antibiotics are therefore the names given to compounds that are naturally generated by specific microbes and have the ability to suppress or eliminate other germs.
When used to treat bacterial infections, antibiotics are a type of antimicrobial medication that target particular cellular mechanisms or structures that are particular to bacteria. Furthermore, a mutation in a bacterium's or microorganism's gene can occasionally lead to antibiotic resistance. It is bacteria's defiance to an antibiotic that was formerly employed to destroy it.
Substances that are naturally produced by certain microorganisms that can inhibit or destroy other microorganisms are called
a. synthetic drugs.
b. narrow-spectrum drugs.
c. semisynthetic drugs.
d. broad-spectrum drugs.
e. antibiotics.
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____ is the type of inhibition of a metabolic pathway when the final product in an enzyme cascade inhibits the first enzyme in the pathway.
Answers
The integumentary system is an organ system consisting of the skin, hair, nails, and exocrine glands. The skin is only a few millimeters thick yet is the largest organ in the body. Your skin and its accompanying structures like hair and mucus are part of the body's first line of defense against pathogens. Describe two ways that the integumentary system protects your body systems from invasion.
Answers
Answer:
Explanation:
Skin is the first line of defense against various harmful activity due to contact with grit, microbes, or harmful chemicals. Sweat produces from sweat glands deters microbes from over colonizing the skin surface by producing dermicidin, which has antibiotic properties prevention infection.
The body has Heat and cold receptors are located in the skin. When the body temperature rises, the hypothalamus in the brain sends a nerve signal to skin glands that produces sweat and they release 1-2 liters of water per hour this cools the body.
The hypothalamus also beings about dilation of the blood vessels of the skin, this allow more blood to flow into those areas with high temperature causing the heat to be convected away from the skin surface.
Please help
Which of the following uses of genetically modified organisms would cause the greatest concern to the
public?
Group of answer choices
A Incorporating recombinant DNA into plasmids so that bacteria produce insulin for patients with diabetes.
B Recombinant DNA being used to enable a bird flu to transfer from human to human in order to study the genetics of human to human transfer
C Using gene therapy to replace defective genes in patients with sickle cell anemia.
D A gene is transferred into to the DNA of a plant, enabling it to produce a toxin that kills crop eating caterpillars by poisoning their gut.
Answers
Recombinant DNA being used to enable a bird flu to transfer from human to human in order to study the genetics of human to human transfer (option B) is likely to cause the greatest concern to the public.
What are genetically modified organisms?Genetically modified organisms (GMOs) are organisms whose genetic material has been altered using genetic engineering techniques. This involves introducing new DNA into an organism's genome, or modifying existing DNA, to give it new or enhanced characteristics that it wouldn't have otherwise.
While GMOs have the potential to offer many benefits, there is also concern about their safety and potential impact on the environment. As a result, GMOs are subject to regulatory oversight and testing before they can be marketed or released into the environment.
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cdks (cyclin-dependent kinases) are proteins responsible for advancing the cell past the checkpoints in the cell cycle. cyclins are proteins that attach to cdks, altering their conformation and readying them for activation. during the cell cycle, which of the following is present in constant levels?
Answers
During the cell cycle, the **cdks** are present in constant levels.
The cell cycle is a highly regulated process that consists of checkpoints to ensure proper DNA replication and cell division. Cyclin-dependent kinases (cdks) are critical proteins that drive cell cycle progression by phosphorylating specific substrates. Cyclins are the regulatory subunits that bind to cdks and activate them, leading to the phosphorylation of downstream targets. While cyclin levels fluctuate throughout the cell cycle, **cdk** levels remain relatively constant. This ensures that cells are able to progress through the cell cycle in a controlled manner, preventing uncontrolled cell proliferation and the development of cancer.
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(Please help :( >>What states of water occur in the water cycle? (Site 2)
Answers
Answer:
Water can occur in three states: solid (ice), liquid, or gas (vapor). Solid water —ice is frozen water. When water freezes, its molecules move farther apart, making ice less dense than water.
Hope this helps :)
Explanation:
HELPPPP!!! WILL GIVE BRAINLIST
Answers
Answer:
the number of drops you counted
Explanation:
Here are the specifications for your forest:
The forest is represented by a 5 x 5 grid.
Year 1: There are a total of 4,500 trees in your forest and no deforestation. Figure out how many trees represent each block.
Year 5: 1,080 trees were deforested.
Year 10: An additional 1,980 trees were deforested.
After you’ve completed your grids, use the Insert Image button to insert screen shots of the grids in the answer space.
Answers
Rounding to the nearest whole number, each block in the updated grid represents 137 trees.
What is cell?A cell is the basic unit of life, consisting of a microscopic, self-contained unit enclosed by a membrane and containing genetic material and other necessary biomolecules. Cells come in many different types, each with a specific function in the body, and are essential to the proper functioning of all living organisms. They are capable of carrying out the processes necessary for life, including metabolism, growth, division, and response to stimuli. There are two main types of cells: prokaryotic cells, which lack a nucleus and other membrane-bound organelles, and eukaryotic cells, which have a distinct nucleus and other membrane-bound organelles.
Here,
To determine how many trees represent each block in a 5x5 grid with a total of 4,500 trees, we can use the formula:
Total number of trees = number of rows x number of columns x number of trees per block
Since we have a 5x5 grid, we can substitute:
4,500 = 5 x 5 x number of trees per block
Solving for the number of trees per block:
number of trees per block = 4,500 / 25 = 180
Therefore, each block in the 5x5 grid represents 180 trees.
In Year 5, 1,080 trees were deforested. To update the grid, we subtract 1,080 trees from the total number of trees:
4,500 - 1,080 = 3,420 trees remaining
Using the formula again:
3,420 = 5 x 5 x number of trees per block
Solving for the number of trees per block:
number of trees per block = 3,420 / 25 = 136.8
In Year 10, an additional 1,980 trees were deforested. Updating the grid:
3,420 - 1,980 = 1,440 trees remaining
Using the formula again:
1,440 = 5 x 5 x number of trees per block
Solving for the number of trees per block:
number of trees per block = 1,440 / 25 = 57.6
Rounding to the nearest whole number, each block in the final grid represents 58 trees.
Here are the grids for Year 1, Year 5, and Year 10:
Year 1:
180 180 180 180 180
180 180 180 180 180
180 180 180 180 180
180 180 180 180 180
180 180 180 180 180
Year 5:
137 137 137 137 137
137 137 137 137 137
137 137 137 137 137
137 137 137 137 137
137 137 137 137 137
Year 10:
58 58 58 58 58
58 58 58 58 58
58 58 58 58 58
58 58 58 58 58
58 58 58 58 58
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Which statements accurately describe osmosis? Check all that apply.
Answers
The first, fourth, and fifth statements accurately describe osmosis.
The net movement of solvent molecules through a semipermeable membrane is known as osmosis. Since the movement is downward and goes from greater to lower concentration, it is comparable to diffusion. However, in osmosis, the movement must take place through a membrane that is semipermeable or selectively permeable. It cannot be referred to as osmosis without this component.
Osmosis is about the net movement of the solvent molecules (not the solute), whereas diffusion is frequently depicted as the net movement of solutes between two solutions (solvent such as water molecules). The water must migrate in order to equalise the concentrations of the two areas due to the different concentrations of water molecules on the two sides of the membrane.
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Explain the function of chloroplasts and photosynthetic pigments in the algae
Answers
Answer:
Chloroplast allows plants to capture the Sun in molecules and convert it to chemical energy. Pigments are good to absorb light in certain wavelengths which means energy from sunlight is captured for photosynthesis.
select all of the following molecules whose functions are pro-apoptotic (function to increase the likelihood that apoptosis will occur). group of answer choices
- IAP
- Bad
- Bcl-2
- Cytochrome c
- Bax
- Fas
- Bak
- SMAC/DIABLO
Answers
The molecules Bad, Bax, Fas, and SMAC/DIABLO are pro-apoptotic, meaning they function to increase the likelihood that apoptosis will occur.
Apoptosis, also known as programmed cell death, is a tightly regulated process that eliminates unwanted or damaged cells in multicellular organisms. Various molecules play a role in either promoting or inhibiting apoptosis. Among the given options, the molecules Bad, Bax, Fas, and SMAC/DIABLO are pro-apoptotic, meaning they promote or enhance the occurrence of apoptosis.
Bad is a pro-apoptotic molecule that inhibits the anti-apoptotic protein Bcl-2 and its family members, thereby promoting apoptosis. Bax is another pro-apoptotic member of the Bcl-2 protein family that triggers the release of cytochrome c from mitochondria, initiating the apoptotic cascade. Fas, also known as CD95, is a cell surface receptor that, when activated by its ligand, triggers a signaling pathway leading to apoptosis. SMAC/DIABLO is a mitochondrial protein released during apoptosis that antagonizes the activity of inhibitors of apoptosis proteins (IAPs), promoting cell death.
On the other hand, Bcl-2 and Cytochrome c are not pro-apoptotic molecules. Bcl-2 is an anti-apoptotic protein that inhibits apoptosis by preventing the release of cytochrome c from mitochondria. Cytochrome c, a component of the electron transport chain in mitochondria, is released into the cytoplasm during apoptosis, but its function is not directly pro-apoptotic.
In summary, the molecules Bad, Bax, Fas, and SMAC/DIABLO are pro-apoptotic, promoting the likelihood of apoptosis occurring, while Bcl-2 and Cytochrome c have functions that are not pro-apoptotic.
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Which statement from the passage is the best evidence of Phillips and Lederer's relationship as of 2002?
A.
" 'Dear Abby' and 'Ann Landers' were both known by their millions of daily readers for their quick wit and sage wisdom."
B.
" 'Dear Abby' has been in publication for more than 50 years and still read daily by more than 110 million people."
C.
"Although they publicly reconciled in 1964, it is said the bitter rivalry continued behind closed doors for decades."
D.
"Lederer's daughter, Margo Howard, said the women had not been in contact for years, and she believes Phillips just wrote the tribute for money."
I NEED YOUR HELP 35 POINTS PLEASE DO NOT TELL ME THE WRONG ANSWER ITS MY LAST QUESTION
Answers
Answer:
D
Explanation:
Step by Step explanation
18) Living things are hugely complex However, all this complexity did not emerge fully-formed from ancient Earth. Instead life almost certainly originated in a series of small steps, each building upon the
complexity that evolved previously. Experiments suggest that organic molecules could have been synthesized in the atmosphere of early Earth Macromolecules arose from the chemical reactions among monomers.
All living things must reproduce, copying their genetic material and passing it onto their offspring. This ability to copy the molecules that encode genetic information is a key step in the origin of life. Most scientists
propose that DNA (Molecule 2) developed from small changes to which of these molecules?
A) ATP
glucose
ORNA
D) polypeptides
Answers
Answer:
Explanation:
I think DNA develped from RNA because they almost shared same components like PENTOSE sugar, POLYPEPTIDES, HYDROGEN BONDS, and enzymatic activities involving replication shares similarity.
Are the offspring created through sexual reproduction identical to the parents ?
Answers
Answer:
no
Explanation:
Just look at siblings with the same parents. They arent identical. Even twins are different from their parents.
Select the correct answer from each drop-down menu.
deductive reasoning is one of the two scientific methods used in archaeology.
deductive reasoning is a
"blank"
approach because it generates a hypothesis by working from
generic
concept to
specific
conclusion.
Answers
Deductive reasoning is a sort of logical reasoning that starts with a broad concept and comes to a specific conclusion. It is also known as top-down thinking or moving from the general to the specific. Here the blank will be logical approach.
What is Deductive reasoning?Deductive reasoning is a type of deduction that is used in both science and life in general.
It takes place when two true statements, or premises, are combined to form a conclusion.
A is equal to B, for example. B is also the same as C. Using deductive reasoning, one can conclude A is equal to C given those two statements.
It is a type of logical reasoning that begins with a broad concept and progresses to a specific conclusion.
Thus, deductive reasoning is a logical approach.
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which body cavity is located inside the rib cage within the torso?
Answers
The body cavity that is located inside the rib cage within the torso is called the thoracic cavity.
The thoracic cavity is an anatomical compartment located within the torso, also known as the chest. It is surrounded by the rib cage and is bounded by the diaphragm inferiorly and the thoracic vertebrae posteriorly. The thoracic cavity is divided into two main compartments:
Mediastinum: The mediastinum is a central region within the thoracic cavity that separates the two pleural cavities containing the lungs. It contains vital structures such as the heart, great vessels (aorta, vena cava), esophagus, trachea, thymus gland, and lymph nodes.
Pleural Cavities: The pleural cavities are located on either side of the mediastinum and contain the lungs. Each pleural cavity is lined by a thin serous membrane called the pleura, which forms two layers: the visceral pleura (covering the lungs) and the parietal pleura (lining the inner surface of the thoracic wall). The pleural cavities are filled with a small amount of pleural fluid, which helps reduce friction during breathing.
The thoracic cavity houses important organs involved in respiration and circulation, including the heart, lungs, major blood vessels, and other structures of the respiratory and cardiovascular systems. It provides protection to these vital organs and facilitates their proper functioning.
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What is the proper method for cleansing the evacuation port of a wound drainage system?
Answers
The proper method for cleansing the evacuation port of a wound drainage system is wiping it with an alcohol sponge and is denoted as option D.
What is a Wound drainage system?This is a system which is designed to ensure the wound is in the best condition for regeneration and healing such as removal of foreign materials or making it moist.
Alcohol helps to sterilize the affected area and makes it moist thereby making it the most appropriate choice.
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The options are:
A. Cleanse it with normal saline.
B. Wash it with soap and warm water.
C. Rinse it with sterile water.
D. Wipe it with an alcohol sponge.
Mt. Paricutin erupts explosively. Little lava helps build the cinder cone. It is almost all ash and rock. What type of magma does it most likely contain?
1) Basaltic
2) Andesitic
3)Rhyolitic
40 Pyroclastic
Answers
Where within the cell does photosynthesis take place?
A. The cytoplasm
B. The chloroplasts
C. The mitochondria
D. The nucleus
Answers
Answer:
B.) The chloroplasts
Explanation:
I have science
Answer:
B
Explanation:
Gizmo
"If the time period were extended to 6 hours, what would the expected blood glucose level for Person A?"
Answers
Explanation:
4 ->130
6 ->x
x=(130×6)÷4=195
In the given question, it says that If the time period were extended to 6 hours, the expected blood glucose level for Person A would be around 110-120 ml/L.
In this case, time is an independent variable whereas glucose level is the dependent variable as it depends on the time which means it changes according to the change in time.
On the basis of the given table,
there is a graph attached in which at x-axis the independent variable is represented and at the y-axis, there is the dependent variable and in respect of person, A and B graph is represented.The graph shows that that the blood glucose is dropping slowly for person A and begin to level off.on the basis of this revelation, it can be assumed that there would be a further drop of 10 to 20 units in the next two hours.
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write a hypothesis for this experiment
if........
then......
because....
Answers
Answer:
What's the experiment?
Explanation:
do robots respond to their enviroment?
Answers
Answer: Yes
Explanation: Yessss
A mutation can cause a defect in human hemoglobin. Which would result in this type of mutation?
choices ; decreased ability to carry oxygen
development of cancerous tumors
inability to break down sugar
development of bacterial infections
PLS ANSWER ITS A TESTT !!!
Answers
Answer:
decreased ability to carry oxygen
Explanation:
A mutation can cause a defect in human hemoglobin, Which would result in - decreased ability to carry oxygen.
Hemoglobin is an iron-rich protein found in red blood cells that gives red blood cells their unique red color. Hemoglobin is the protein responsible for carrying oxygen in red blood cells.
A mutation in the hemoglobin gene changes the hemoglobin protein in a way that causes sickle cell anemia.Sickle cell disease is caused by mutations in the beta-globin (HBB) geneThis mutation leads to the production of an abnormal version of a subunit of hemoglobinThis mutated version has decreased ability to carry oxygenThus, a mutation can cause a defect in human hemoglobin, Which would result in - decreased ability to carry oxygen.
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Why does mitosis occur
Answers
can you match each distinctive feature with the worm phylum that displays it? part a sort each feature to the appropriate worm phylum.
Answers
The distinctive features matched with the worm phylum that displays it are Longitudinal and circular muscle layers in the body wall - Platyhelminthes. Complete digestive system, Body segments bearing setae, and Coelomic fluid that acts as a hydrostatic skeleton - Annelida.Body cavity between the mesoderm and endoderm - Nemertea.Crown of ciliated tentacles for feeding - Echiura.
Here are the distinctive features matched with the worm phylum that displays it.
Part A
1. Longitudinal and circular muscle layers in the body wall - Platyhelminthes
2. Complete digestive system - Annelida
3. Body segments bearing setae - Annelida
4. Body cavity between the mesoderm and endoderm - Nemertea
5. Crown of ciliated tentacles for feeding - Echiura6. The coelomic fluid that acts as a hydrostatic skeleton - Annelida
Part B
1. Platyhelminthes: The phylum Platyhelminthes displays the feature of Longitudinal and circular muscle layers in the body wall.
2. AnnelidaThe phylum Annelida displays the feature Complete digestive system, Body segments bearing setae, and Coelomic fluid that acts as a hydrostatic skeleton.
3. NemerteaThe phylum Nemertea displays the feature Body cavity between the mesoderm and endoderm.
4. EchiuraThe phylum Echiura displays the feature Crown of ciliated tentacles for feeding.
To summarize, the distinctive features matched with the worm phylum that displays it are Longitudinal and circular muscle layers in the body wall - Platyhelminthes. Complete digestive system, Body segments bearing setae, and Coelomic fluid that acts as a hydrostatic skeleton - Annelida.Body cavity between the mesoderm and endoderm - Nemertea.Crown of ciliated tentacles for feeding - Echiura.
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A type of landscape in rainy regions where caverns ,sinkholes,and deep valleys are common called
Answers
Answer:
Karst topography
hope this helped~ <3
-Dream