Phylogenetic trees represent

A. unique species that share few characteristics with species today.
B. points in time where species went extinct.
C. geographical areas that supported a variety of species in the past.
D. evolutionary relationships between species

Answers

Answer 1
The answer for this is D.

Think of phylo- as a group of organisms and -genetic as genes of these organisms. Put it into a tree formar and it’ll show how genetics will group these organisms and how they are related (like a family tree).
Answer 2
The correct answer would be D

Related Questions

The continuous movement of water between the Earth's surface and the atmosphere is known as:

condensation
the hydrological cycle
evaporation
precipitation

Answers

Answer:

the hydrological cycle

Explanation:

The hydrological cycle is the cycle of the water between the Earth's surface (geosphere and biosphere) and the atmosphere. The water moves continuously between these spheres, making it one of the numerous agents that are interchanged and connect them. This cycle is one of the most important ones on Earth, as it is the one that enables life, precipitation, erosion, the existence of large bodies of water, rivers, and streams, the process of photosynthesis etc.

Answer:

hydrological cycle

Explanation:

When do feedback loops fail to work on an ecosystem?


If you could explain the answer, that would be awesome :)))))

Answers

Answer:

Feedback loop will fail in an ecosystem if the factors regulating the feedback mechanisms fail to function.

Explanation:

Feedback loop is the phenomena in which output is circled back in a way that it is used as input again i.e the reaction is circled back. Its a continuous process.

There are two types of feedback loops, positive and negative, one functions to reinforce and other functions to balance. Positive feedback loops enhance the outputs while negative lower the output and keeps the balance. the variables that are involved in all these processes effect each others so, by eliminating such variables or factors will cause failure of feedback loops.

Which of these is an example of how the ocean influences climate?

A. It causes long droughts and rainfalls in coastal areas.
B. It causes temperatures near shorelines to be less variable.
C. It reduces the amount of rainfall near lakes.
D. It makes the weather warmer near the poles than expected.

Answers

Answer: Option B

Explanation:

The oceans control the temperature by moving the hot air towards poles and cold air towards the equator. Ocean currents makes the colder air flow from the poles towards equator and hot air from from the equator to the poles.

It also makes the rain fall and helps in the regulating the temperature near the shoreline and makes it less variable.

So, the correct answer is option B

Final answer:

The ocean's ability to absorb and distribute heat leads to moderated and less variable temperatures in coastal areas, making option B the correct answer to how the ocean influences climate. So the correct option is B.

Explanation:

The question asks for an example of how the ocean influences climate. Among the given options, the correct answer is B. It causes temperatures near shorelines to be less variable. This is because oceans have a tremendous capacity to absorb and store heat, and they distribute this heat through their currents, stabilizing temperatures. Coastal areas benefit from these ocean effects, resulting in moderated climates with less temperature variation throughout the year.

Maritime Climates and Temperature Moderation

Water heats and cools more slowly than land due to its high specific heat capacity. This is known as 'thermal inertia', which enables coastal regions to experience milder climates, even in places that are far north, such as the coast of Norway. The interior of a continent, away from the moderating influence of the ocean, tends to have more extreme temperatures. On the coast, the differences in temperature are smoothed out, leading to less variable climates. Oceans also impact precipitation patterns, which can lead to climates that are not only milder but also can have increased rainfall, depending on global wind and current patterns.

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What is phosphorylation?


the conversion of phosphate into another molecule


the removal of a phosphate group from a molecule


the conversion of a molecule into phosphate


the addition of a phosphate group to a molecule

Answers

Answer:

I believe it is D.

Explanation:

Hope my answer has helped you!

Answer: i think its D: the addition of a phosphate group to a molecule

Explanation:

Which statement is true of Y chromosomes?
A. Only men have them.
B. Women have two of them.
C. Only women have them.
D . All babies have them.

Answers

Answer:Only men have them

Explanation:

The true statement of Y chromosomes is option A. Only men have them.

What are Y chromosomes?In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes.Y chromosome is a sex chromosome that is normally present only in male cells, which are designated XY. Most human cells contain 23 pairs of chromosomes. One set of chromosomes comes from the mother, while the other comes from the father. The twenty-third pair is called the sex chromosomes, while the rest of the 22 pairs are called autosomes.Typically, biologically male individuals have one X and one Y chromosome (XY) while those who are biologically female have two X chromosomes.

Hence, the true statement is option. A.

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When coal has reached it hardest, darkest form, it is called
Select one:
0 a. sub-bituminous
b. lignite
c. bituminous
d. antrhacite
Next page

Answers

When the coal reaches its hardest and the darkest form then it is termed as anthracite.

Answer: Option D

Explanation:

The hardest among the coal is called as the anthracite. It has large amount of carbon atoms and it is also regarded as the best quality of coal that is being mined.

This is mostly prevalent in South Korea, North Korea, United states, United Nations, Canada etc. This is mainly used in the steel making process and is combined with many alloys for enhancing their property.

To find the price of bituminous coal per million BTU's, we need to follow these steps:
1. Convert the price from tons to pounds:
  - Since there are 2,000 pounds in a ton, we can multiply $52/ton by 2,000 to get the price per pound.
  - $52/ton * 2,000 pounds/ton = $104,000/pound
2. Convert the heat content from BTU/pound to BTU:
  - Since there are 12,000 BTU/pound, we can multiply the price per pound by 12,000 to get the price per BTU.
  - $104,000/pound * 12,000 BTU/pound = $1,248,000,000/BTU
3. Convert the price to per million BTU's:
  - Since there are 1,000,000 BTU's in a million BTU's, we can divide the price per BTU by 1,000,000 to get the price per million BTU's.
  - $1,248,000,000/BTU / 1,000,000 BTU = $1,248 per million BTU's
Therefore, at $52/ton, the price of bituminous coal per million BTU's is $1,248.
Please let me know if there's anything else I can help you with.

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Bacteria and viruses have different mechanisms and machinery to survive and replicate. Because of this, there are different ways of treating bacterial and viral infections. What is a difference in the way that bacterial and viral infections are treated medically?

A) Viruses can be treated with antibiotics, bacteria cannot.

B) Bacteria can be treated with antibiotics, viruses cannot.

C) Vaccinations provide immunity from viruses, but not bacteria.

D) Vaccinations provide immunity from bacteria, but not viruses.

Answers

B) Bacteria can be treated with antibiotics, viruses cannot.

Antibiotics have no target when dealing with viruses. Antibiotics work on bacteria because it targets the growth machinery in bacteria. Viruses are found inside a human cell and reproduce by inserting their DNA into a human cell. There are antivirals and vaccines out there for viruses. Our body’s immune system fights against viruses with antibodies!

Answer:

That is correct on USATestPrep

Explanation:

Bacteria can be treated with antibiotics, viruses cannot.

Antibiotics won't treat viral infections because they can't kill viruses. Viruses are not living and depend on a host cell to provide the machinery for reproduction.

Does sand/silt have any internal structures?

Answers

Answer:

Yes sand/silt have internal structures.

Explanation:

Sand is composed of silicon dioxide, in it silicon and oxygen atoms are joined by covalent bonds, it is mostly in the form of quartz and is in granular form.

Silt size is between sand and clay, composed of framework of silicon dioxide and feldspar.  

Which phrase best defines taxonomy?

A) the study of the digestive system

B) the process by which an organism obtains energy

C) the science of classification

D) a group of archaeans that live in deep-sea trenches

Answers

Answer:

C the group of science classifications.

Explanation:

Taxonomy is better known in science for the classification of various plants and animals on the basis of their characteristics .

The phrase which best defines taxonomy is the science of classification.The correct option is C.

Taxonomy is the practice and science of categorization or classification.A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types.

Among other things, a taxonomy can be used to organize and index knowledge (stored as documents, articles, videos, etc.), such as in the form of a library classification system, or a search engine taxonomy, so that users can more easily find the information they are searching for. Many taxonomies are hierarchies .

As taxonomy is a science of classification ,option C is correct.

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When is your respiration rate likely to change?
A. When your intestines are digesting
B. When your cells have too much glucose
C. When your cells need more oxygen
D. When your liver is working after a meal

Answers

Answer:

I believe the answer is "C. When your cells need more oxygen."

Please mark brainliest, if right. Thanks :)

Yes the correct answer would be C. When your cells need more oxygen

In a population of owl monkeys, allele T codes for tufted tails ( TT and Tt). The
frequency of allele t, which codes for nontufted tails (tt), is 40 percent. If a new
predator starts catching the monkeys by their tufts and natural selection occurs,
which of the following would most likely happen over time?

A) The frequency of allele T would increase

B) The frequencies for the two allele forms would equal out.

C) The frequency of allele T would decrease and the frequency of allele t would
increase.

D) No changes would take place because the allele governing tufted tails is not
dominant.

Answers

Answer:

C) The frequency of allele T would decrease and the frequency of allele t would increase.

Explanation:

If the hunter is going after monkeys with tufted tails (TT), the tufted tail monkeys would die out from the new predator, letting the non-tufted tails (tt) increase in population.

during translation, how many mrna bases are needed to code for each amino acid?​

Answers

Answer:

Three bases

Explanation:

Answer:

Three Bases

Simple calculations show that a minimum of three bases is required to encode at least 20 amino acids. Genetic experiments showed that an amino acid is in fact encoded by a group of three bases, or codon. The code is nonoverlapping. Consider a base sequence.

Theories basic to all of the life sciences include the
germ theory of disease.
theory of evolution by natural selection.
O two of these answers are correct
none of these answers are correct
O
cell theory.

Answers

Theories basic to all of the life sciences include the cell theory because all living things are made up of cells.

Please help!!!!! ASAP!

Algae are microscopic plants that grow in the ocean. Algae must have sunlight, nutrients, and water to survive. What are these conditions called?

A. uncontrolled factors
B. limiting factors
C. necessary factors
D. non-living factors

Answers

Answer:

B) limiting factors

Explanation:

Phytoplankton, also known as microalgae, are similar to land-based plants in that they contain chlorophyll and require sunlight in order to live and grow. Most phytoplankton are buoyant and float in the upper part of the ocean, where sunlight penetrates the water. Phytoplankton also require inorganic nutrients such as nitrates, phosphates, and sulfur which they convert into proteins, fats, and carbohydrates.

In a balanced ecosystem, phytoplankton provide food for a wide range of sea creatures including krill, shrimp, snails, and jellyfish, that are in turn food for larger animals like sea turtles, fish and whales. However, under certain environmental conditions, such as the introduction of too many nutrients from land based sources of pollution, phytoplankton may grow out of control and form blooms.

These blooms can be problematic because the excess algae can block out sunlight, which is bad for plants like seagrasses that need sunlight to make food. Zooxanthallae, or symbiotic algae that live in the tissue of coral and supply coral with food, can also be impacted by algal blooms. Excess algae can also smother other critters living on the ocean floor.

When blooms eventually exhaust their nutrients, the phytoplankton die, sink and decompose. The decomposition process depletes surrounding waters of available oxygen, which marine animals need to survive. These oxygen-depleted waters are often called “dead zones,” since animals either die from lack of oxygen or leave the area to find more habitable waters.

The factors such as sunlight, nutrient, and water to survive all cinditions that for algae bloom which are called: B. limiting factors.

What are Limiting Factors?

Limiting factors can be defined as those constrains that slows or stop the growth of a population. They may include food, biotic factors, or even competetion from other organisms in the environment for limited available resources.

Thus, factors such as sunlight, nutrient, and water to survive all cinditions that for algae bloom which are called: B. limiting factors.

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Which of these internal feedback reactions does not need your brain? OA. Your leg jumping when it is hit by a reflex hammer B. Your deeper breathing when you need more oxygen C. Your body temperature rising when you have an infection D. Your heart beating faster when you are in danger

Answers

A. Your leg jumping when it is hit by a reflex hammer

what is a drought? what problem can it cause?

Answers

Drought also affects the environment in many different ways. Plants and animals depend on water, just like people. When a drought occurs, their food supply can shrink and their habitat can be damaged. Sometimes the damage is only temporary and their habitat and food supply return to normal when the drought is over.

Answer:

no water and it can cause the plants and wildlife to dehydrate and the land around will become dry and could start a wildfire

a forest fire burns down most of the trees in a large forest l. the animals that live in the trees are forced to move to other areas. what kind of disturbance is this?
A. cyclical
B. small
C. primary
D. secondary

Answers

Answer:

Answer is D , Secondary

Explanation:

An example of Secondary Succession by stages:

1. A are of growth 2. A disturbance, such as a fire, destroys the forest

3. The fire burns the forest to the ground

4. The fire leaves behind empty, but not destroyed soil

5. Grasses and other herbaceous plants grow back first

6. Small bushes and trees begin to colonize the public area

7. Fast growing evergreen trees and bamboo trees develop to their fullest, while shade-tolerant trees develop in the understory

8. The short-lived and shade intolerant evergreen trees die as the larger deciduous trees overtop them. The ecosystem is now back to a similar state to where it began.

The mammal pictured below is a silvery mole rat.

Which statement is an inference based on the picture?
The animal is ugly.
The animal has hairless feet with sharp claws.
The animal has prominent upper and lower incisor teeth.
The animal likely has poor vision since its eyes are so small.

Answers

Answer:

D) The animal likely has poor vision since its eyes are so small.

Explanation:

The question is asking for an inference, a conclusion reached on the basis of evidence and reasoning.

We can infer that the mole rat has poor vision since it's eyes are so small.

At first I thought this question was asking to make an observation based on the dichotomous key

make sure to read the questions carefully, this was about to be my first wrong Brainly answer

The animal likely has poor vision since its eyes are so small  is an inference based on the picture.

What are the feature of silvery mole rat?

This is a medium-sized mole-rat with soft, silky silvery-grey fur. The head is paler around the eyes, the sides of the face and the snout, and some individuals have a small white patch on the forehead. The long, slightly-curved incisors lie outside the lips.

Hence, the question is asking for an inference, a conclusion reached on the basis of evidence and reasoning.

We can infer that the mole rat has poor vision since it's eyes are so small.

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What property of water results from its high boiling point?

A. High surface tension
B. Low density as a solid
C. Low vapor pressure
D. High heat capacity

Answers

Answer






I think it’s d

High heat capacity of water results from its high boiling point. Thus, option D is correct.

What are the properties of water?

Water has a few significant actual properties. Albeit these properties are recognizable as a result of the inescapability of water, a large portion of the actual properties of water are very abnormal.

Given the low molar mass of its constituent atoms, water has bizarrely huge upsides of thickness, surface strain, intensity of vaporization, and entropy of vaporization, which can all be attributed to the broad hydrogen holding connections present in fluid water.

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Thick, brownish haze formed when certain gases in the air react with sunlight is called ____________. radon photochemical smog ozone acid rain

Answers

Answer:

photochemical smog

Explanation:

Thick, brownish haze formed when certain gases in the air react with sunlight is called photochemical smog.

Photochemical smog is a combination of pollutants which are formed when certain gases such as nitrogen oxides and other  organic compounds react with sunlight, leading to the formation of brown haze.

Answer: photochemical smog

Explanation:

Photochemical smog is a type of smog that is produced when the ultraviolet light reacts with the nitrogen oxides present in the atmosphere. It can be seen as a brown visible haze. It can be seen during morning as well as in the afternoon, especially can be seen in the densely populated warm cities.

Why is it important that the bonds between nitrogenous bases are weak?

Answers

It is important that the hydrogen bonds are weak because this enables them to be formed and broken easily while still giving shape to the DNA structure. For example, when DNA replicates itself it can unzip easily because of the weak bonds that aid the helicase enzyme to do its job.

It is important that the bonds between nitrogenous bases are weak as the bonds which are present between nitrogenous bases are hydrogen bonds which are weak bonds.

Which bonds are present between Nitrogenous bases?

Nitrogenous bases are the nitrogen-containing compounds which are the components of the nucleotides that are the monomeric units of DNA (deoxyribonucleic acid). Purines and pyrimidines are the two types of nitrogenous bases which are found in the DNA molecule.

Hydrogen bonds are responsible for holding the paired nitrogenous bases together in the DNA. Because, hydrogen bonds are the weak bonds that are present between the two strands of DNA. These bonds are easily separated, which is a characteristic that is important to DNA's function.

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Which of these internal feedback reactions does not need your brain? OA. Your leg jumping when it is hit by a reflex hammer B. Your deeper breathing when you need more oxygen C. Your body temperature rising when you have an infection D. Your heart beating faster when you are in danger

Answers

Answer:

d your heart beating faster

The correct option is A. leg jumping when it is hit by a reflex hammer is the only brain-free option. It's a spinal reflex - a quick response through the spinal cord without needing the brain to process information.

Only the leg jumping when it is hit by a reflex hammer skips the brain. It's a spinal reflex for a quick response, while the others (B, C, D) rely on the brain to receive info and tell your body what to do (breathing, temperature, heart rate).

The other options (B, C, and D) require the brain's involvement and are not spinal reflexes:

B. Deeper breathing when you need more oxygen: When your body senses low oxygen levels (through blood chemistry changes), the brain receives these signals and triggers deeper breaths to increase oxygen intake.

C. Body temperature rising when you have an infection:  During an infection, the immune system releases chemicals that signal the brain to increase the body's core temperature, a defense mechanism.

D. Heart beating faster when you are in danger: When you perceive danger, sensory information reaches the brain, which activates the nervous system, causing your heart rate to increase to prepare for action.

In all these options (B, C, and D), the brain plays a crucial role in interpreting signals and sending commands to organs for adjustments.

Which of the following substances is not
involved in the chemical reaction that pro-
duces smog?
a. sunlight
b. particulate matter
C. automotive exhaust
d. ozone

Answers

B) particulate matter!

Sunny~ ☺

Particulate matter is not involved in the chemical reaction, which produces smog.  

• The air pollution, which diminishes visibility is smog.  

• The majority of the smog that one sees today is the photochemical smog.  

• It is generated when sunlight reacts with atleast one volatile compound and nitrogen oxides in the atmosphere.  

• The nitrogen oxides come from coal power plants, factory emissions, and car exhaust.  

• The volatile compounds are discharged from paints, gasoline, and many cleaning solvents. When sunlight react with these chemicals, they produce ground level ozone or smog and airborne particles.  

• The mixture of solid particles and liquid droplets found in the air is known as the particulate matter.  

• The particulate matter has no role in the production of smog.  

Thus, the correct answer is option b, that is, particulate matter.

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Which is the layer underground where all empty spaces are filled with a
combination of air and water?

A. Impermeable rock

B. Zone of saturation

C. Zone of aeration

D. Water table

Answers

Final answer:

The layer underground with all empty spaces filled with air and water is called the Zone of saturation.

Explanation:

The layer underground where all empty spaces are filled with a combination of air and water is called the Zone of saturation. This zone is located below the Zone of aeration. The Zone of saturation is where the groundwater level is located and all available space is filled with water.

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In humans, a cleft chin is dominant and non-cleft is recessive. What will the generation look like

Answers

Answer:

most will have a cleft chin and some will have a non cleft.

Explanation:

Yes, since the cleft chin is dominant, more people will have that over that recessive trait

behavioral adaptation can be either instinctual or

Answers

Answer:

It can either be instinctual or learned.

Explanation:

An Instinctual behavior is one that a living being knows from the moment of birth, such as breathing or eating, but a Learned behavior is a behavior or habit acquired by personal experience, like speaking, walking, or playing video games.

Final answer:

Behavioral adaptation in animals can be instinctual or learned.

Explanation:

Instinctual behaviors, not influenced by the environment, include innate responses such as mating systems or methods of communication. This kind of behavior is genetically embedded and could include actions like human babies grabbing a finger or birds migrating.

On the other hand, learned behaviors are influenced by environmental changes and previous experiences. Learning involves acquiring knowledge and skills through experience which enable an organism to adapt to its living conditions. Instances of learned behavior could include a creature's specific reactions to threats based on past encounters.

Therefore, instinctual behaviors provide a solid base of survival skills, while learned behaviors allow for versatility and adaptability in changing environments.

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2 Polnis
Which of the following is an advantage of an in vitro experiment?



Please help me

Answers

where are the answers choices? please be more specific
In vitro experiments are done in a lab. An advantage would be that you have control over what ur doing and know exactly what’s going on. But I can answer specifically if u send the choices.

What is a plant cell’s source of energy for photosynthesis

Answers

The answer you might be looking for it the ‘sun”

Answer:

Your answer is the sunlight.

Explanation:

Chloroplasts are organelles found in plants that help harvest sunlight and break it down into sugar/energy; part of the photosynthesis process.

A light meal will digest in about how many hours?

Answers

A light meal will digest in about 2 hours.
Final answer:

Digestion of a light meal typically takes 3 to 5 hours, starting from the stomach where it breaks down into chyme and passes through the ileocecal sphincter to the large intestine. The sphincter's relaxation is controlled by nerves and hormones triggered by stomach activity.

Explanation:

A light meal will typically digest within about 3 to 5 hours. The process starts in the stomach, where food is broken down into a substance called chyme. The food then passes through the ileocecal sphincter, a gate between the small and large intestines. This sphincter relaxes through the action of nerves and hormones, allowing food residue into the first part of the large intestine, the cecum.

The ileocecal sphincter is relaxed through two main factors. First, the digestive activity in the stomach provokes the gastroileal reflex, which increases ileal segmentation force. Second, the stomach releases the hormone gastrin, enhancing ileal motility and thus relaxing the ileocecal sphincter. After chyme passes through, backward pressure closes the sphincter, preventing backflow into the ileum.

Overall, the transit time and processing of the food through the stomach and small intestine usually takes 3 to 5 hours. However, retention time of food over the length of the whole intestine can be between 24 to 72 hours.

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Select the correct answer.
Which scenario describes unethical lab behavior?
O A. Danny stores the chemicals required for his experiment in flasks and beakers.
B.
Anna publishes the results of her experiment on the growth rate of saplings.
c.
Jason repeatedly runs an experiment until he gets the results he desires.
D. Mia records her observations of an experiment precisely and accurately.

Answers

Answer: The answer would be c.

Jason repeatedly runs an experiment until he gets the results he desires.

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How many bones are there in the human body? Given that lines b and c are parallel, select all that apply. The solid, inorganic portion of the earth system is known as the Choose the most logical choice to complete each sentence. Yo _____frutas todos los das. beba coma bailaba escuchaba Read the paragraph and answer the question that follows: The town of Belmond, Iowa, needs to add weather sirens. The loud and steady wail would warn citizens of approaching danger. If past history is an indication, the sirens will save hundreds of lives. With a prediction of a deadly storm season, the alert system is needed immediately. Which sentence should be revised to eliminate redundancy? (10 points) The town of Belmond, Iowa, needs to add weather sirens. The loud and steady wail would warn citizens of approaching danger. If past history is an indication, the sirens will save hundreds of lives. With a prediction of a deadly storm season, the alert system is needed immediately. What is true about the completely simplified sum of the polynomials 3x2y2 2xy5 and 3x2y2 + 3x4y?The sum is a trinomial with a degree of 5.The sum is a trinomial with a degree of 6.The sum is a binomial with a degree of 5.The sum is a binomial with a degree of 6. which is an example of a vestigial structure?A: paw of a lionB: wing of a birdC: appendix of a humanD: tail of a cat(I think it's A but I'm not sure) Scientists believe that _______ of species that once existed on Earth are now extinct. A. about three-quarters B. nearly half C. about 40% D. over 99 percent Write as an algebraic expression and then simplify if possible The distance traveled by a train in three hours with a constant speed of r miles per hour. Which points represent an approximate solution to this system of equations? y=1/x-3 y=3-x A. (1.5, 1)B. (1.5, -0.7) C. (1.6, 1.6)D. (2.9, -22.8) Raymond can paint 5/8 of a wall in 16minutes. How long would it take him to paint 1/3 of a wall? What is indirect characterization?O when the author shows a character's traits through words and actionsO when a character expresses her true nature by acting in an opposite mannero when the narrator tells what a character is like with an explicit descriptionO when a narrator is also a character in a story who provides internal thoughts Which best describes the authors purpose in "Dwaina Brooks? which phrase in this sentence is a verbal phrase the feet of the dead witch had disappeared entirely and nothing was left but the silver shoes A water main is to be constructed with a 12.512.5% grade in the north direction and a 2020% grade in the east direction. Determine the angle theta required in the water main for the turn from north to east. What is a social contact The statement below is from the U.S. Constitution. "The Congress shall have Power To raise and support Armies." Based on the statement, the power to create and support an army is which type of power? Concurrent power Reserved power Delegated power Shared power math help please its just one question Which was a cause of the French Revolution?A- Magna CartaB- Stamp act C- Frances financial crisis D- Dictatorship of Napoleon Bonaparte Truck brakes can fail if they get too hot. In some mountainous areas, ramps of loose gravel are constructed to stop runaway trucks that have lost their brakes. The combination of a slight upward slope and a large coefficient of rolling friction as the truck tires sink into the gravel brings the truck safely to a halt. Suppose a gravel ramp slopes upward at 6.0 and the coefficient of rolling friction is 0.30. How long the ramp should be to stop a truck of 15000 kg having a speed of 35 m/s.