Answer:
total momentum of the two cars after they collide= 100 kg m/s
Explanation:
We use law of conservation of momentum which says that , for an isolated system , total momentum before collision is equal to the total momentum after the collision.
Total momentum of two cars before collision= 100 kg m/s
so the total momentum of the two cars after the collision= 100 kg m/s
Explanation:
On which of the following DNA strands would UV radiation have the most effect?
O AACCGGG
O TATATACG
O AUAUCGAU
O AATTAGTTC
O TATATACG O AATTAGTTC
UV radiation causes damages to DNA and it would have the most effect on TATATACG and AATTAGTTC because they have the highest number of thymine (T) bases, which are more susceptible to damage by UV radiation than adenine (A) and cytosine (C) bases.
UV radiation can cause a number of different types of damage to DNA, including Pyrimidine dimers, Oxidative damage, Depurination and Photoproducts.
Pyrimidine dimers: The most common type of damage caused by UV radiation is the formation of pyrimidine dimers, which occur when two adjacent thymine or cytosine bases bond together. This can cause distortion of the DNA double helix, making it difficult for the cell to replicate or transcribe the affected DNA.
Oxidative damage: UV radiation can also lead to the production of reactive oxygen species (ROS) in the cell, which can cause oxidative damage to DNA. This can include the formation of 8-oxo-guanine, a modified form of guanine that can lead to mutations.
Depurination: UV radiation can also cause the loss of purine bases (adenine and guanine) from the DNA strand, which can lead to strand breaks and other forms of damage.
Photoproducts: UV radiation can also lead to formation of cyclobutane pyrimidine dimers (CPDs) and 6-4 pyrimidine-pyrimidone photoproducts (6-4 PPs) which are the major types of DNA damage caused by UV radiation.
The damage caused by UV radiation can lead to mutations, cell death, or cancer if not repaired. Cells have repair mechanisms to fix the damage.
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LIMITED TIME, HELP PLEASE URGENT!!!!!!!!!!!
Bowerbirds construct elaborate bowers (nests) and decorate them
with different colors to attract females. The Satin bowerbird builds
a nest between upright sticks, and decorates with bright blue
objects, while the MacGregor's bowerbird builds a tall tunnel of
sticks and decorates with bits of white objects. The two
populations have almost identical genes, but the birds cannot
breed with each other. This is most likely because
Select one:
O A forest separates the two populations of bird
O Their different mating rituals separate the two populations
O Both species of bird used to breed together until a hurricane
randomly killed the some of the birds
O The Satin bowerbirds are larger than the McGregor's bower birds
Answer:
2
Explanation:
the mating rituals make the most sence
How did the comb jelly become invasive?
Answer:
The comb jelly (Mnemiopsis leidyi) became invasive in the Black Sea in the early 1980s, likely due to its introduction via ballast water from ships from the east coast of the United States. Its rapid spread and high reproductive rate allowed it to become the dominant species in the Black Sea, out-competing native species for food and resources. It has since spread to other parts of the world, including the Mediterranean Sea and the Caspian Sea.
Explanation:
Im not understanding what this is telling me to do please help
Answer: i believe its asking you to add another line to the food web with the mollusks it gave you
What is the typical path that dietary cholesterol takes through the digestive system from the mouth to where it is absorbed into the bloodstream?
When food components and gastric enzymes combine in the stomach, cholesterol absorption starts. The stomach controls how much gastric acid, together with bile and pancreatic juice, is sent to the duodenum.
Where does digestional absorption take place?
The majority of the nutrients in your meal are absorbed in your small intestine before being transported by your circulatory system to other areas of your body for storage or use. A special type of cell helps nutrients pass through the gut lining and into the circulation.
How do fats or oils go from the gastrointestinal tract to the heart?
The fats are absorbed by the intestinal cells. Chylomicrons are enormous lipoprotein structures made of long-chain fatty acids that carry lipids through the lymphatic system. Intestinal cells produce chylomicrons.
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20 points
Which property of water plays the most important part in water's role as a universal solvent?
Water helps regulate body temperature
Water can exist as a solid, liquid, or gas
Water molecules have slightly positive and slightly negatively charged ends
Water contains oxygen atoms
Answer:
Water molecules have slight positive and slightly negative ends. And there’s no point saying it’s worth 20 points
Explanation:
According to the Bohr model of the atom, describe how an electron can get to an excited state. Also, describe what happens when an electron transitions to an energy level closer to the nucleus.
project planning teams use project life cycle models because various types of projects have differing demands. which of the following sequences of stages is most appropriate for a life cycle model for research and development (r
The correct option is B ; concept definition - demonstration - development - production.
Research and development is mainly concerned with the development of a new concept, incorporation into a product, and delivery of product to the market as a way to improve the bottom line of the company.
It allows companies maintain a competitive edge over others in the same industry by bring new and innovative products to the customer.
The stages of R&D include: concept definition - demonstration - development - production.
The innovative idea is first defined and feasibility is evaluated.
The concept is demonstrated to show practicability of the idea.
The concept is further developed to suit customer needs.
Finally production and marketing is done to make product available to the customer.
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Full Question;
Project planning teams use project life cycle models because various types of projects have differing demands. Which of the following sequences of stages is most appropriate for a life cycle model for research and development (R & D) projects?
a. define - measure - analyze - improve - control.
b. concept definition - demonstration - development - production.
c. pre-planning - design - procurement - construction - start up.
d. concept - requirements - design - code - test - turnove.
Explain why your evidence (what you wrote in Box 2) supports your claim (what you wrote in Box 1). Also, explain the scientific principles behind your reasoning. Remember to provide enough detail so that a friend who did not do the experiment could learn from your description.
The justification for why the statement is supported by the evidence is provided by the argument. Included should be a summary of the fundamental scientific hypothesis that gave birth to the evidence or data.
What is an example-based argument?
By using specific instances as a basis, a sound conclusion may be drawn. In this approach, the specific instances 1, 2, and 3 lead to a broad generalization about the overall problem. My Sony television, audio system, car radio, and video system, for instance, are all in fine working order.
What is clarified by logic?
The rationale explains "why" and "how" the facts support the claim. Included should be a summary of the fundamental scientific hypothesis that gave birth to the evidence or data.
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The miRNAs in a cell inhibit protein synthesis by forming complementary bonds with mRNA True Or False
True. MicroRNAs (miRNAs) are small non-coding RNAs that play an important role in gene regulation.
They are produced from longer non-coding RNA transcripts and then bind to complementary sequences on mRNA molecules, typically in the 3' untranslated region (3'UTR). By binding to the mRNA, miRNA inhibits its translation into a protein, thus repressing the expression of the gene encoded by the mRNA. This type of regulation is known as post-transcriptional gene regulation.
miRNA have been shown to be involved in a wide range of cell processes, such as development, differentiation, proliferation, and apoptosis.
Therefore the given statement is true.
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1 Structure of the Nervous System (continued)
Sequence the steps in how a nerve impulse moves from one neuron to another neuron by writing the numbers 1 to 5 in the squares to the left of the steps.
The steps in how a nerve impulse moves from one neuron to another will be:
An electrical impulse is sent along an axon, jumping from node to node in axons covered with myelin.The impulse reaches the synapse, where channels in the plasma membrane open.Vesicles containing neurotransmitters fuse with the plasma membrane and release the neurotransmitters by exocytosis.The neurotransmitter moves across the synapse and binds to receptors on the dendrite of a neighboring neuron.At the dendrite, the threshold for an action potential is reached, opening channels in the plasma membrane and causing a reversal in electrical charge.What is the nervous system?The brain and spinal cord make up the central nervous system, one of the two major components of the nervous system. All of the body's parts are connected by nerves that emerge from the spinal cord and make up the peripheral nervous system.
Electrical changes across the neuron membrane result in the transmission of a nerve impulse along a neuron from one end to the other.
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S.K., a 51-year-old roofer, was admitted to the hospital 3 days ago after falling 15 feet from a roof. He sustained bilateral fractured wrists and an open fracture of the left tibia and fibula. He was taken to surgery for open reduction and internal fixation (ORIF) of all of his fractures. He is recovering in your orthopedic unit. You have instructions to begin getting him out of bed and into the chair today. When you enter the room to get S.K. into the chair, you notice that he is agitated and dyspneic. He says to you, "My chest hurts really badly. I can't breathe." You auscultate S.K.'s breath sounds and find they are diminished in the left lower lobe. S.K. is diaphoretic and tachypneic and has circumoral cyanosis. His apical pulse is irregular and 110 beats/min
The five possible reasons for S.K.'s symptoms are :
It might be because of the decreased temperatures. Because the patient is a roofer, he is experiencing symptoms as a result of his living situation.It might be because he was born with a congenital cardiac condition.It's possible that he doesn't have enough oxygen in his lungs.He might be getting a whole new ailment.It might be a side effect of his open reduction and internal fixation surgery.After a protracted stay at high altitude, cardiac output during exercise is reduced. These alterations in cardiac output diminish maximum oxygen absorption at high altitude, which remains low long after arterial oxygen content normalises.
Hypoxia is defined as low oxygen levels in your bodily tissues. It produces symptoms such as disorientation, agitation, trouble breathing, a high heart rate, and blue skin.
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Reasons for such condition can be The drop in temperature could be the cause. The patient, a roofer, has symptoms as a result of his living condition and his occupation. He might have a congenital cardiac disorder, which would explain it.
Exercise-induced reduction in cardiac output occurs after an extended stay at a high altitude. Maximum oxygen absorption at high altitude is reduced by these changes in cardiac output, and it stays low even after arterial oxygen content returns to baseline. Low oxygen levels in your body tissues are known as hypoxia. It causes symptoms like confusion, anxiety, difficulty breathing, an elevated heart rate, and bluish skin. The colder temperatures could be to blame. The patient, a roofer, has symptoms as a result of his living condition and his occupation.
He could have a congenital heart defect, which might clarify it.
He might not have enough oxygen in his lungs, in such case.
He could be developing a completely new illness.
His open reduction and internal fixation surgery could be to blame.
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Dr. Jones is testing a new treatment for cancer. He administered the treatment to a large sample of patients and kept track of who lived and who died after receiving the treatment. For each person who lived, he attributed the success to the treatment. For each person who died, he attributed the death to the severity of the person’s cancer. He concluded that his treatment was effective.
Dr. Jones' conclusion may be problematic for several reasons. One issue is that he did not control for other factors that could have affected the outcome, such as the stage of the cancer at the time of treatment or the patients' overall health.
What is the treatment about?A randomized controlled trial is a study design in which participants are randomly assigned to receive either the treatment being tested or a control treatment (such as a placebo).
Additionally, by only attributing the success of the treatment to those who lived and the failure to the severity of the cancer in those who died, he may be overlooking other potential explanations for the outcomes.
Therefore, A more rigorous study design, such as a randomized controlled trial, would be necessary to establish the effectiveness of the treatment.
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Which of the following statements about the classical pathway of complement activation is FALSE?
A) C1 is the first protein activated in the classical pathway.
B) The C1 protein complex is initiated by antigen-antibody complexes.
C) C3 is not involved in the classical pathway.
D) Cleaved fragments of some of the proteins act to increase inflammation.
E) C3b causes opsonization.
how do i find the size of acceleration and do the problem?
Answer :Search It Up innit
What is the basic scientific unit for the volume of an irregular shaped item?
a. seconds
b. celsius
c. milliliters
d. centimeters cubed
e. grams
f. meter
What is the basic scientific unit for the volume of regular shaped item?
a. seconds
b. centimeters cubed
c. celsius
d. milliliters
e. grams
f. meter
Answer:
1.) its D ..
2.) its Meter.
What do scanning electron microscope and transmission electron microscope have in common
Answer: What they both have in common is that they both contain an electron gun.
Explanation:
"1) An organism with IsCAP+P+O+Z+Y+A+/F’I+ will have a normal functioning Lac operon.
a) True
b) False"
Option b is Correct. Contrary to popular belief, an organism with IsCAP+P+O+Z+Y+A+/F'I+ will not have a healthy Lac operon.
The lac operon exhibits leaky expression, which ensures that even after the removal of lactose, a little amount of eiwit is still produced. When the requirements are violated, it is crucial to get the lactose metabolism going so that lactose cannot be broken down in the cel without permease.
When lactose is present, it binds to the repressor. Thus, the DNA is released by the repressor, allowing the operator to enter freely. RNA polymerase can now be sent via the operator to view the structural elements. Ribosomes are able to synthesize the essential enzymes in this place.
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Darius and his family are excited about taking a cross-country trip to see his parents. They plan to bring the family dog, Barnie, who does not regularly ride in the car with them. Darius is worried that Barnie might get motion sickness on the ride and asks the vet if there is something he can give Barnie to keep the poor dog from vomiting in the car. The vet says that if he prescribes a medication, it will likely cause Barnie to sleep all the way across the country! He does suggest an herbal alternative that might do the trick and writes it down for Darius to purchase at the health food store. Which herb did the vet MOST likely recommend for Barnie’s big trip?
A.
goldenseal
B.
ginger root extract
C.
slippery elm bark
D.
echinacea
If Darius and his family are excited about taking a cross-country trip to see his parents. They plan to bring the family dog, Barnie and Darius is worried that Barnie might get motion sickness on the ride. The herb that the vet MOST likely recommend for Barnie’s big trip is: B. ginger root extract.
What is motion sickness?Motion sickness is a type of sickness that occur when a person begins to feel dizzying, nausea when the person is in a moving car or on a ride. A person with motion sickness may begins to vomit, have headache among others.
Based on this scenario the herbs that the vet most likely recommend to Darius dog is ginger root extract. Ginger is plant and this plant is good for the body as it help to boost the immune system. Ginger root extract can be used to treat motion sickness when a person is on ride and it is used to as well stop nausea.
Therefore we can conclude that the correct option is B.
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Answer:
B. ginger root extract
Explanation:
Analyze Figure 3. After incubation do you predict the
researchers will see
bioluminescence?
Why or why not?
A living thing producing and emitting light is known as bioluminescence. Animals that glow in the dark can be found in all marine habitats, including those at the ocean's surface and on the deep seafloor.
What is bioluminescence?The production and emission of light by living things is known as bioluminescence. This type of chemiluminescence exists. Marine vertebrates and invertebrates frequently exhibit bioluminescence, as do some fungi, microorganisms, including some bioluminescent bacteria, and terrestrial arthropods like fireflies.
A chemical process that results in the production of light energy inside an organism's body causes bioluminescence. A species must contain luciferin, a molecule that creates light when it reacts with oxygen, in order for a reaction to take place.
Utilizing specialized cameras with extremely sensitive detection systems, the bioluminescence emitted can be detected and boosted.
Note that an overview on bioluminescence was given as the complete information wasn't found.
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How many gene pairs are involved in the inheritance of size in these strains of guinea pigs? O five O two four O three
Ten gene pairs are thought to control how these guinea pig strains inherit their size.
Each cell generally has 46 chromosomes, or 23 pairs of them. The 22-pair structure of the autosome.The 23 pairs of chromosomes are referred to as sex chromosomes since they are voluntary. The children have seven different skin tones depending on how many capital letters are present in each genotype.
There are more than just the standard two alleles that generally encode for a certain feature in a species in gene pairs with multiple alleles, which is sort of a non-Mendelian inheritance pattern. A individual inherits two alleles—one from each parent—for each chromosomal location containing such variation.
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Explain what would happen if a kidney from a person with blood group A is transferred to the body of a person with blood group O
Answer:
they would probably die
Explanation:
blood losss because of bad doctor error
the hypothalamus receives a signal from the nervous system that a specific hormone is needed to maintain homeostasis sin the body what is the next step
Answer:
A. The hypothalamus sends the needed hormone to the body.
B. The hypothalamus sends a messenger hormone to the pituitary gland.
C. The hypothalamus determines which area of the brain it activates.
Explanation:
What is the Hypothalamus?The hypothalamus, which is a structure deep within the brain, serves as the body's intelligent control and coordination center. Its primary duty is to maintain the body in a steady state known as homeostasis. It accomplishes this by either directly altering the autonomic nervous system or controlling hormones.
Answer BreakdownChoice A is the best answer. The hypothalamus is the gland in the body that is responsible for homeostasis. Therefore, the hypothalamus will produce the necessary hormone the body needs to retain homeostasis.Choice B is not the best answer. Depending on the body's exact response, the hypothalamus may send a messenger hormone to the pituitary gland. However, the hypothalamus is generally responsible.Choice C is incorrect. The hypothalamus can transmit hormones that may go to the brain or interact with neurotransmitters in the brain but it does not "activate a portion of the brain" to maintain homeostasis.Scientists take scientific measurements carefully in order to ensure their reliability and validity. What is the difference between accuracy and precision in scientific measurements?
a.
Accuracy is how far out the measurement is taken, while precision is how close a measured value is to its true value.
b.
Accuracy is how close a measured value is to its true value, while precision is how close measured values are to each other.
c.
Accuracy is how close a measured value is to its true value, while precision is how close the average value is to the true value.
d.
Accuracy and precision are two different words for the same thing.
The difference between accuracy and precision in scientific measurements is that accuracy is how close a measured value is to its true value, while precision is how close measured values are to each other (option B).
What is accuracy and precision?Accuracy is the ability of an instrument to measure the accurate value is known as accuracy. In other words, it is the the closeness of the measured value to a standard or true value.
The closeness of two or more measurements to each other is known as the precision of a substance.
In other works, accuracy is said to be the degree of closeness between a measurement and its true value while precision is the degree to which repeated measurements under the same conditions show the same results.
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If you are fighting an infection, your
a. lymphocytes
b. lymph
might become enlarged and painful.
c. lymph nodes
d.
capillaries
Answer:
The answer is C. lymph nodes
Explanation:
LIMITED TIME!!!! HELP FAST!!!
Fossils of ancestors of the modern horses show a small, 4-toed,
almost dog-like browsing animal named Eohippus. Over time, the
horses got larger, lost toes, and changed to a grazing diet. What is
the best explanation for why this change occurred?
Select one:
The horses needed to run faster, so they ran more and their leg
and foot structure adapted.
The horses changed their environment to fit their needs for
survival.
The horses with traits most suited to the changing environment
survived.
The horses took the extra energy from a grazing diet and used it
to grow larger.
An early version of the horse, known as Eohippus, had four toes and resembled a little dog. The horses grew bigger, lost toes, and switched to a grazing diet over time.
Can you lose weight through grazing?After all, eating small meals throughout the day helps to control your blood sugar levels and keeps you fed for your workouts. But according to recent research reported in the journal Cell Metabolism, grazing may be preventing you from losing weight, which is good for your health, especially if it lasts into the evening.
Do full meals or frequent snacking provide more energy?According to one study, grazing (which they examined with 6 meals per day) supported good glucose metabolism more than eating a diet with the recommended total caloric intake.
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Fossils and genes are used to determine (1 point)
O how species interact with each other.
O differences between organisms.
O how species will change over time.
O how many mutations occurred in a species over time.
Which of the following would cause cells to switch from cellular respiration to fermentation?
a. The final electron acceptor in the ETC is not available.
b. The proton-motive force runs down.
c. NADH and FADH supplies are low.
d. Pyruvate is not available.
The factor for cells switching from cellular respiration to fermentation is a) the final electron receptor in the TEC is not available.
The reason certain cells switch from respiration to fermentation is due to their oxygen supply and oxygen demand. If the oxygen demand of the cells is much higher than the oxygen supply, the cells can no longer sustain aerobic respiration. In this case, the cells switch from respiration to fermentation. Like combustion, cellular respiration completely oxidizes glucose to CO2 and water. Fermentation, on the other hand, does not completely oxidize glucose. Instead, small, reduced organic molecules are produced as a waste product. As a result, cellular respiration releases more energy from glucose than from fermentation.
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dogs and wolves are more closely related to each other than either is to cats. Draw a phylogenetic tree to show these relationships.
Answer:
Wolf
Dog
|
V
Cat
Explanation:
A phylogenetic tree is a diagram that shows the evolutionary relationships between different organisms. The tree is constructed using a method called cladistics, which looks at shared characteristics among different organisms.
Based on the information you provided, the tree would show that dogs and wolves are more closely related to each other than either is to cats. This would be represented by a branching pattern, with dogs and wolves being on one branch and cats on another branch, with the branch containing dogs and wolves being closer to the trunk of the tree.
It's important to note that this is a simplification and in reality the relationships between species are more complex, with many branches and sub-branches.
Suppose that phenotypic variation in the tail length of mice is summarized in the table below. 0.5 0.5 0.3 0.4 = 0.0 Additive genetic variance (VA) What is the narrow-sense heritability (h') of tail length? Dominance genetic variance (Vo) Genetic interaction variance (V) Environmental variance (VE Genetic-environmental interaction variance (VGE) Number What is the broad-sense heritability (H) of tail length? Number
phenotypic variation in the tail length of mice is additive genetic variance (VA) = 0.5, Dominance genetic variance (VD) =0.3, Genic interaction variance (VI) =0.1,Environmental variance (VE) = 0.4 and Genetic-environmental interaction variance (VGE) = 0.0. Narrow-sense heritability is 0.38. Broad-sense heritability is 0.38 and Broad-sense heritability is 0.69.
Narrow-sense heritability is VA/VP
= 0.5/1.3
= 0.38.
Broad-sense heritability is VG/VP
= (VA + VD + VI)/VP
= 0.9/1.3
= 0.69
The variance in phenotypes that exists in a population is known as phenotypic variation. People come in varied sizes and shapes, for instance; different phenotypes include differences in height, weight, and body form. The capacity to roll your tongue is a changeable trait, as are hair, eye colour, and skin tone.
Genotypic variation, or the variance in genotypes between people, is influenced by alleles. The genotype is the actual DNA code and is made up of the allelic makeup of a particular gene. Phenotypic variation, or the variation in phenotypes between individuals, can result from genetic variation.
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