the levels of what molecules fluctuate during specific parts of the cell cycle to promote cell cycle progression?
Answers
The progression of the cell through the numerous checkpoints is controlled by two families of proteins known as cyclins and cyclin-dependent kinases (Cdks).
The levels of the four cyclin proteins change in a predictable fashion during the cell cycle. Cyclin-dependent protein kinases (Cdks) are key components of the cell-cycle regulation system, and their activity is reliant on their connection with regulatory subunits known as cyclins. Oscillations in the activity of distinct cyclin-Cdk complexes initiate a variety of cell-cycle events.
In the last post, we looked at the why of cell cycle transitions: the elements that a cell examines when determining whether or not to go through the cell cycle. External cues (such as chemical signals) and internal cues are examples of both (like DNA damage).
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Related Questions
Megan observes four cells under a microscope and makes sketches of them as shown. Identify whether the cells are prokaryotic or eukaryotic.
Answers
Eukaryotic have nucleus
t/f blood flow is directly related to the pressure gradient from one end of a vessel to the other, but inversely related to the resistance.
Answers
The given statement " blood flow is directly related to the pressure gradient from one end of a vessel to the other, but inversely related to the resistance" is true.
Blood flow is directly related to the pressure gradient along a vessel and inversely related to the resistance encountered within the vessel.
The pressure gradient refers to the difference in pressure between two points along a blood vessel. Blood flows from an area of higher pressure to an area of lower pressure. Therefore, an increased pressure gradient results in increased blood flow, assuming no significant changes in resistance.
Resistance is the opposition encountered by blood flow within the blood vessels. It is determined by factors such as vessel diameter, vessel length, and blood viscosity. According to Ohm's law, blood flow is inversely proportional to resistance. As resistance increases, blood flow decreases, and vice versa.
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1. Do you think manufacturers of computers and television sets and other forms of e-waste
(Core Case Study) should be required to take them back at the end of their useful lives for
repair, remanufacture, or recycling? Explain. Would you be willing to pay more for these
products to cover the costs of such a take-back program? If so, what percent more per
purchase would you be willing to pay for electronic products?
Answers
1. The correct answer to the task above about e-wastes is that it should be recycled.
2. I won't be willing to pay more for the cost of take-back materials of devices simply because these devices still have components which will still be useful for the manufacturers.Why wastes of electronic devices should be taken back for repair or recycling.Computers, and others electronic devices; when they got broken or spoilt, needs to be recycled simply because the activities of of recycling back the devices makes more raw materials available for another re-manufacturing.
In conclusion, it can therefore be deduced from the explanation given above that recycling of substances is one of best ways of making them much more available where they are scarce.
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Anika's dream job is to work as a scientist for NASA. Which education path will help her achieve her goal?
A. A humanities major at a four year university.
B. A STEM major at a four year university.
C. A one-year electrician's program.
D. A liberal arts major at a private college.
Answers
A STEM major in the university for four years will be a path for Anika to achieve her goal.
What is NASA?NASA stands for National Aeronautics and Space Administration.
It is a body that concerns itself with the administration of space programs and aeronautics with respect to civilians.
In order to work at NASA, one would need, at least, a good degree in STEM course. STEM stands for Science, Technology, Engineering, and Mathematics.
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Answer:
b
Explanation:
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An electric frying pan draws a current of 12 A when connected to a 120-V circuit.
Which of the following accurately describes the resistance of the frying pan?
A
The resistance is 132 ohms because resistance is directly proportional to current and voltage by the formula R = V + I.
B
The resistance is 1,440 ohms because resistance is directly proportional to current and voltage by the formula R = VI.
C
The resistance is 10 ohms because resistance is inversely proportional to current and directly proportional to the voltage by the formula R = V/I.
D
The resistance is 0.1 ohms because resistance is inversely proportional to voltage and directly proportional to the current by the formula R = I/V.
Answers
Answer:
(B)
Explanation:
The resistance is 1,440 ohms because resistance is directly proportional to current and voltage by the formula R = VI.
What is the Constant of “which bait works best for a fly trap?”
Answers
Answer:
Mix scraps of meat (the older, the better) with something sweet. Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination
do all cells use the energy that is stored in ATP
Answers
Answer:
yes all of them cause they need transportation and respiration (cellular)
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Most of the world's iron ore, including that found in northern Minnesota, formed during the middle Precambrian period, ranging in age from 1.8 to 2.5 billion years old. They are composed of alternating layers of iron-rich material, most often magnetite or hematite, and silica. These iron oxide minerals formed on the ocean floor, creating the banded iron deposits you see here. What was the source of the oxygen that helped to produce these deposits?
A) The oxygen that was released into the atmosphere as a by-product of photosynthesis caused iron deposits to oxidize creating the iron oxide minerals.
B) Photosynthetic organisms making oxygen as a by-product of photosynthesis and the oxygen reacted with the iron dissolved in seawater to form iron oxide minerals.
C) The decomposition of carbon-based life forms in the oceans released oxygen and carbon dioxide. These gases reacted with the iron deposits forming the minerals mentioned.
D) In Earth's early biosphere, there were not organisms that underwent aerobic cellular respiration and an excess of oxygen built up in the atmosphere. This oxygen reacted with iron deposits to form iron oxide minerals.
Answers
Answer:
b
Explanation:
Answer:
) Photosynthetic organisms making oxygen as a by-product of photosynthesis and the oxygen reacted with the iron dissolved in seawater to form iron oxide minerals.
Explanation:
What happens to the beetle larvae when it tries to eat methocha?
Answers
How are i actic acid formation and alcohol fermentation different from each other?
Answers
Answer:
In lactic acid fermentation, pyruvate is reduced to lactic acid. ... In alcoholic fermentation, pyruvate is reduced to alcohol and releases carbon dioxide. This type of fermentation is commonly used with yeast to make alcoholic beverages and cause bread to rise
Explanation:
How is the movement of food through the esophagus most accurately characterized?
a. Gravity is necessary to move food toward the stomach.
b. Skeletal muscle is the main muscle type around the esophagus.
c. Nutrients are absorbed in the esophagus.
d. The muscular contractions are entirely involuntary.
e. The muscular contractions are wave-like.
Answers
The movement of food through the esophagus is most accurately characterized by muscular contractions, which are wave-like, also known as peristalsis. The correct option is e.
The wave-like muscular contractions known as peristalsis are responsible for moving food from the esophagus to the stomach. The first option, a is incorrect because gravity is not necessary for the movement of food toward the stomach. The process is accomplished by muscular contractions, as mentioned before. The second option, b, is also incorrect. The muscle-type around the esophagus is smooth muscle, not skeletal muscle. The third option, c, is not correct either. No nutrients are absorbed in the esophagus, as it is a muscular tube that connects the throat to the stomach.
The last option, d, is also incorrect. Although the process of peristalsis is involuntary, it is not entirely involuntary because some voluntary muscles can also contribute to the swallowing process. The esophagus, which is a muscular tube, performs the function of transporting food from the mouth to the stomach. The walls of the esophagus are made up of layers of smooth muscle that contract and relax to push food toward the stomach. This is accomplished by peristalsis. Peristalsis is a wave-like contraction of the muscles that propel food down the digestive tract.
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Choose the event that correctly completes the flowchart showing how ATP is formed during photosynthesis.
H+ ions flow into the thylakoid.
H+ ions flow out of the thylakoid.
ATP gains a phosphate group
ATP loses a phosphate group.
Answers
Answer:
B
Explanation:
explain how
peroxidase behaves like an enzyme to help protect the body against H2O2.
Answers
Answer:
Peroxidase is an enzyme found in a wide variety of organisms, from plants to humans to bacteria. Its function is to break down hydrogen peroxide (H2O2), which is one of the toxins produced as a byproduct of using oxygen for respiration. (The fact that it's toxic is what makes hydrogen peroxide useful in first aid kits.
The ostrich is a bird. However, it has traits that are different from those of the birds we typically see flying around our neighborhoods. Using credible sources, investigate the environment and adaptations of ostriches to explain how they evolved to survive in their environment.
ASAP NEEDS TURNED IN TODAY!!
Answers
Answer:
I found this from someone else. This is not my work, Also if this does not answer the question ask the question on here and you can see more answers. hope this helps.!
Explanation:
According to National Geographic, ostriches are a part of a very small group of birds that cannot fly because unlike most birds, their small wings are not strong enough to carry their body for flight and their breastbone isn't balanced enough for flying. Birds that are unable to fly are called ratites.
A number of scientists namely Thomas Huxley, Richard Owen, and others have tried to show that these ratites are actually related to each other and eventually, it was discovered that they all had one thing in common, the way the bones at the roof of the mouth were arranged was similar to that of reptiles rather than other birds.
Richard Owen found and assembled the remains of an extinct ostrich skeleton which was an extinct moa and contrary to already held opinion, one ratite known as tinamous did not really fit with the profile of a ratite because it could fly, even though almost grudgingly and they possessed keeled sternum which suggests that they evolved from flying birds.
DNA tests showed that tinamous evolved within ratites and not necessarily as a separate entity. The tests also showed that moas and tinamous are related.
It was also speculated that the division of the supercontinent Pangaea southern side led to the separation of flightless ratite ancestors, causing each landlocked group to evolve and become the flightless birds we know today such as the ostrich, rheas, etc.
46) biomanipulation can best be described as a) removing many of the next higher trophic level organisms so that the struggling trophic level below can recover. b) a means of reversing the effects of pollution by applying antidote chemicals that have a neutralizing effect on the community. c) an example of how one would use bottom-up model for ecosystem restoration. d) adjusting the population numbers of each of the trophic levels back to the numbers that they were before man started disturbing ecosystems. e) monitoring and adjusting the nutrient and energy flow through a community with new technologies.
Answers
removing many of the creatures in the trophic level above the current one so that the trophic level below can recover.
Option A is correct.
In biology, what is biomanipulation?Shapiro et al. (1975) coined the term "biomanipulation," which refers to a branch of biological engineering in which biota are altered in order to reduce undesirable algal species and biomass in addition to, or in place of, nutrient loading reductions.
The importance of biomanipulationThe main goal of this strategy is to reduce the eutrophication-causing excessive concentration of hazardous phytoplankton in the water bodies. Zooplanktons are introduced to suppress phytoplankton development, which subsequently enhances water quality and nutrient cycling.
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what are ryanodine receptors? what type of tissue are they present in? are all ryanodine receptors regulated in the same way? explain your answer.
Answers
Ryanodine receptors are a type of ion channel found in various types of tissues including skeletal muscle, cardiac muscle, and neurons. These receptors are responsible for releasing calcium ions from the sarcoplasmic reticulum in muscle cells, which is crucial for muscle contraction and other cellular processes.
Although all ryanodine receptors serve the same function, they are regulated differently depending on the tissue in which they are present. For example, ryanodine receptors in skeletal muscle are regulated by the protein calmodulin, while those in cardiac muscle are regulated by phosphorylation.
Overall, ryanodine receptors are important for proper muscle function and cellular processes, and their regulation varies depending on the tissue in which they are present.
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2. In unicorns, having a
white horn (W) is dominant
to having a brown horn (w).
Two heterozygous unicorns
are crossed.
What is the probability that
the offspring will have a
white horn?
Please help!!!
Answers
Answer:
75%
Explanation:
Heterozygous means that there is two different alleles, one being dominant, while the other is a recessive trait (Ww).
As stated in the question, it is noted that the dominant allele is denoted as a capital W, while a recessive allele is denoted as a lowercase w.
Two heterozygous unicorns are crossed. Create a Punnett Square. The probability for the offspring would be found within the Punnett Square.
\(\left[\begin{array}{ccc}&W&w\\W&WW&Ww\\w&Ww&ww\end{array}\right]\)
Remember, having the dominant trait (W) would result in the offspring obtaining a white horn. In this case, 3 of the 4 offspring has at least one dominant allele (W), or a 75% probability.
75% is the probability that the offspring will have a white horn.
~
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which of the following will increase the rate of transcription? histone acetylation leading to chromatin decompaction d. histone methylation leading to chromatin compaction removal of rna polymerase
Answers
Option C. is correct, Gene expression levels have long been known to be significantly influenced by the state of chromatin, the packaging of DNA in eukaryotes. Several chromatin-altering techniques, such as ATP-dependent remodelling.
The cell uses histone modification to control the transcription of certain genes. Since several histone acetyltransferases have been discovered and further studied in recent years, histone acetylation is one of them that is most thoroughly understood. chromatin remodelling and histone acetylation A restrictive barrier to transcription is represented by chromatin. This molecular barrier is a highly dynamic structure that can fit the complete genome's DNA inside the limits of a nucleus while yet allowing access to the genetic material stored inside.
Which of the following will increase the rate of transcription?
a. Activation of a transcriptional repressor
b. Inhibition of a transcriptional activator
c. Histone acetylation leading to chromatin decompaction
d. Histone methylation leading to chromatin compaction Removal of RNA polymerase
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How have modern advancements allowed this modern-day scientist to do research in a way that Darwin couldn’t?
Answers
Modern advancements have enabled this modern-day scientist to conduct research in a manner that Charles Darwin couldn't. These advancements have revolutionized various aspects of scientific investigation, providing scientists with unprecedented tools and opportunities for discovery.
1. Technological Innovations: The development of advanced laboratory equipment and tools has significantly enhanced the scientist's ability to analyze and manipulate biological samples. From high-resolution microscopes to gene sequencing machines, these advancements allow for a more detailed examination of organisms and their genetic makeup.
2. Computational Power: The availability of powerful computers and sophisticated algorithms has transformed the field of data analysis. Modern scientists can process vast amounts of genetic data, run complex simulations, and perform intricate statistical analyses. This computational power allows for more precise and comprehensive investigations, enabling them to uncover patterns and relationships that Darwin could only dream of.
3. Collaborative Research: The advent of the internet and digital communication has facilitated global collaboration among scientists. They can share data, exchange ideas, and work together on projects regardless of geographical barriers. This collaborative approach leads to a collective accumulation of knowledge and accelerates the pace of scientific discovery.
4. Access to Information: The digital age has made a wealth of scientific literature and research readily accessible. Scientists today can access an extensive database of previous studies, allowing them to build upon existing knowledge and make more informed hypotheses. Darwin, on the other hand, had limited access to scientific literature and relied mostly on firsthand observations.
5. Interdisciplinary Approaches: Modern scientists have the advantage of interdisciplinary collaboration, combining knowledge and techniques from multiple fields. By integrating biology, physics, chemistry, and other disciplines, researchers can approach problems from different angles, leading to deeper insights and innovative solutions.
In summary, modern advancements in technology, computation, collaboration, and access to information have empowered today's scientists to conduct research in ways that were unimaginable during Darwin's time. These advancements have expanded the scope of investigation, increased precision, and accelerated the pace of scientific discovery.
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Which structures are parts of the central nervous system?
Answers
The central nervous system(CNS) is composed of the encephalon and spinal cord.
What factors should be considered when building an animal crossing?
Answers
Answer:
Don't Add Every Other Player As A Best Friend. You may be excited to jump on a forum to …
Don't Place Your Buildings Too Close To Each Other. Another huge mistake players make …
During the first few days of the game, you may find yourself with a small amount of
Explanation:
what does TACTTCAAACCG, ATGAAGTTTGGC, AUGAAUUUGGC molecules stand for
Answers
Answer:
TBH I don't know
Explanation:
Select the correct answer from each drop-down menu.
What do animals receive from each parent?
Animals recelve a copy of each
1.gene,kidney,cell
from each parent, however, only one copy develops a characteristic called a
2.color
structure
trait
Answers
Many farmers and gardeners compost their plant and animal waste. The living material naturally decays in compost bins, forming a dirt-like substance that’s rich in nutrients. The next season, farmers use this substance as a natural fertilizer for their crops. A biology student has grown tomato plants for several years. Until now, he used an artificial fertilizer formulated for tomato plants. This fertilizer caused his plants to grow faster and taller than they grew in unfertilized soil. The student wants to know whether using natural compost will cause his tomato plants to grow faster and taller than his artificial fertilizer. Answer the following questions to plan an investigation using the steps of the scientific method and help the student find the answer to his question. part g
Answers
Answer:
hey!!
Conduct Background Research: The student should gather information on the benefits and drawbacks of using compost as a natural fertilizer, as well as the effects of artificial fertilizer on plant growth. This research will provide a foundation for designing the experiment.
Formulate a Hypothesis: Based on the research, the student should develop a hypothesis that predicts the outcome of the investigation. For example, the hypothesis could be: "Using natural compost as a fertilizer will result in tomato plants growing faster and taller compared to using artificial fertilizer."
Design and Conduct the Experiment:
a. Variables: Identify and control the variables in the experiment. The independent variable is the type of fertilizer (compost or artificial), while the dependent variables are the growth rate and height of the tomato plants.
b. Experimental Groups: Divide the tomato plants into two groups. One group will be treated with natural compost, and the other group will be treated with artificial fertilizer.
c. Control Group: It's important to have a control group that receives no fertilizer to serve as a baseline for comparison.
d. Randomization: Randomly assign the tomato plants to the different treatment groups to minimize bias.
e. Replication: To ensure the reliability of the results, have multiple plants in each treatment group and repeat the experiment several times.
f. Measurement: Regularly measure the growth rate and height of the tomato plants in each group. Use standardized procedures and tools for accurate measurements.
Analyze the Data: Collect and analyze the data obtained from the experiment. Compare the growth rate and height of tomato plants treated with natural compost, artificial fertilizer, and the control group. Use appropriate statistical analysis to determine if there are significant differences between the groups.
Draw Conclusions: Based on the data analysis, evaluate whether the hypothesis is supported or not. Determine if the tomato plants treated with natural compost grew faster and taller compared to those treated with artificial fertilizer or the control group.
hi again i hope this answered your question :)
WHAT DO YOU THINK IS MEANT BY GOOD TROUBLE?
Answers
Answer:
Good trouble is when you get in trouble for a good reason. If a rule is unfair and you protest against it can be called "good trouble".
the genetic material of the cell is most like
1 . The blueprint for a building
2 . The tracks for a train
3 . An advertisement for a store
4 . A fence for a house
Answers
Which byproduct of fermentation is excreted in the sweat where it inhibits microbial growth?
A. Lactic acid
B. Interferon
C. Hypothalamus
D. Interleukins
Answers
A: Lactic Acid
The anterior cingulate, which typically decreases as an individual meditates, is the brain area Multiple choice question. that supplies the frontal cortex with the neurotransmitter serotonin.
Answers
Answer:associated with conscious awareness and acts of will
Explanation:
a forensic team is collecting evidence from the scene where a murder victim has been found. beetles, adult flies, larva and eggs are found on and near the body. what is the correct order in which these insects should be collected?
Answers
Beetle adults, larvae, ants, etc. Adult flies caught with a sweep net can either be dropped directly into 80% ethyl alcohol or sedated with an insect kill jar before being dropped into the alcohol.
What are the soul and body?You refer to your entire self, including your intellect and emotions, when you use the terms "body" and "soul." He committed his entire being to educating young guys. She had now devoted her entire being to the band. wholeheartedly is a synonym.
What names do the body's components go by?The five basic components of human anatomy are the head, neck, torso, arms, and legs. But behind the surface, many biological and chemical processes keep the human body machine running.
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in humans, there are four blood types: a, b, ab and o. each parent can give their offspring one of three blood type alleles, ia (coding for phenotype a), ib (coding for phenotype b), or neither, which is expressed as i (coding for phenotype o). this trait displays codominance. tina has type o blood and her sister rosa has type ab blood. what are the blood genotypes their parents must have?
Answers
Humans have four blood types: A, B, AB, and O, which are determined by three blood type alleles: IA, IB, and i. Codominance is displayed in this trait.
Tina has type O blood, which means she must have inherited an i allele from each parent.
Rosa has type AB blood, indicating that she inherited an IA allele from one parent and an IB allele from the other.
Therefore, for their offspring to have the observed blood types, one parent must have the genotype IAi and the other must have the genotype IBi.
In summary, the blood genotypes of the parents of Tina and Rosa must be IAi and IBi, respectively.
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The only possible combination of genotypes for their parents is IAi and IBi. This would allow for one parent to pass on an i allele to Tina and an IA allele to Rosa, and the other parent to pass on an i allele to Tina and an IB allele to Rosa.
In humans, there are four blood types: A, B, AB, and O. Each parent can give their offspring one of three blood type alleles, IA (coding for phenotype A), IB (coding for phenotype B), or neither, which is expressed as i (coding for phenotype O). This trait displays codominance. Tina has type O blood and her sister Rosa has type AB blood. The blood genotypes their parents must have are IAi and IBi.
The reason for this is that Tina has type O blood, which means she has two i alleles (ii). This means that both of her parents must have at least one i allele to pass on to her. Rosa has type AB blood, which means she has one IA allele and one IB allele. This means that one parent must have an IA allele and the other parent must have an IB allele.
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