Categories
Assignment Help

The fossil record clearly shows that ________. the fossil record clearly shows that ________. large complex organisms evolved long before simple. nearly all species that have existed in the past still exist today. all species evolve from pre-existing species. new species appear suddenly and fully differentiated, without an ancestral species. several different species can hybridize to produce a single new species

[ad_1]

Answered by answersmine AT 22/10/2019 – 02:35 AM

I think the answer is all species evolve from pre-existing species. This was based on Charles Darwin’s Theory of Evolution which he learned during his expeditions.He identified that some fossils have similarities with other existing animals, in which he believed were a part of adaptation in order to survive.

[ad_2]

Categories
Assignment Help

Which of the following statements about the effects of pollution on marine ecosystems is true? a. Burning fossil fuels causes a direct increase in the temperatures of ocean water. b. Burning fossil fuels causes a decrease in the pH of ocean water making it more acidic. c. Pollution in marine ecosystems causes a decrease in the formation of algal blooms. d. Addition of warm water has no effect on marine ecosystems

[ad_1]

The equation for how temperature changes the resistance R is: 

R=R₀(1+α(T-T₀)), where R₀ is the resistance at T₀=20°C, T is the temperature for which we want to calculate the resistance and α is the temperature coefficient for resistance. 

The resistance of the copper wire increases by 18% or by 0.18, so the new value for the resistance is R=1.18*R₀.

T₀=20°C
=0.0068
R=1.18*R₀

Now we need to input that into the equation for resistance change and solve for temperature T.  

1.18R₀=R₀(1+α(T-20)), R₀ cancels out,

1.18=1+α(T-20),

1.18-1=α(T-20), we divide by α,

0.18/α=T-20, we put 20 on the left side,

26.47+20=T

T=46.47°C

So the temperature on which the resistance of copper wire will increase by 18% is T=46.47°C. 

[ad_2]

Categories
Assignment Help

Which is NOT a type of fossil? A) mold B) cast C) imprint D) mark

[ad_1]

Answer:

The answer is C. In order to carefully control conditions and confirm or disconfirm a hypothesis about the causes of behavior, one must perform an experiment.

Explanation:

Experimental research allows the researcher to control all the variables in order to create the conditions that can confirm or disconfirm a hypothesis. This method aimes to establish a relation of causality between two variables, which means that one variable is generated and determined by the other; this is posible because all of the other variables that can influence it have been controlled.

When a researcher conducts a survey or engages in naturalistic observation, he can’t control the variables, therefore, he can only establish a correlation between two variables, but not of causality.

[ad_2]

Categories
Assignment Help

Which fossil type is made from minerals that form stone after the animal decays?

[ad_1]

In tropical rain forest, the animals will have to deal with higher temperatures and greater rainfall. One example of an adaptation they might need is a thin, water-proof coat. This will prevent heat from becoming trapped inside their fur/hair/feathers, and the water-absorbing coating will allow water to stick to the inside of the coat without being absorbed, where the water will absorb the heat instead of themselves, and will cool the through evaporative cooling (heat release through evaporation)

In a deciduous forest, there is much colder temperatures, and significantly less rainfall. These animals would likely want a thicker water-proof coat. This is because the thicker coat would allow heat to become trapped, keeping them warm in the winter, and the water-proof coating prevents water from freezing in their fur, making them colder.

[ad_2]

Categories
Assignment Help

WORTH 25 POINTS PLEASE ANWNSER AND DONT GUESS Fossils of the coelocanth, a primitive fish, date back about 140 million years. Modern coelacanths are virtually identical to their fossil ancestors. This species most likely evolves through the process of A. convergent evolution. B. punctuated equilibrium. C. coevolution. D. gradualism.

[ad_1]

WORTH 25 POINTS PLEASE ANWNSER AND DONT GUESS Fossils of the coelocanth, a primitive fish, date back about 140 million years. Modern coelacanths are virtually identical to their fossil ancestors. This species most likely evolves through the process of A. convergent evolution. B. punctuated equilibrium. C. coevolution. D. gradualism.

[ad_2]

Categories
Assignment Help

What makes a fossil an index fossil

[ad_1]

What makes a fossil an index fossil

[ad_2]

Categories
Assignment Help

At which site would you be most likely to find fossil remains of australopithecus africanus?

[ad_1]

Depending on what resources you use, it can be easy or difficult to get examples of each categories

Some easy way can include searching google, wikipedia, encyclopedia.org, etc. These usually give you a broad and large amount of information that you can draw out of, and an over view that allows you to know what the paragraph would be talking about before you use it. 

Difficult ways would be searching through specific websites, such as national geographics, etc, which gives you specific details on the idea (and is more trusted then the others)

Remember too always get facts, not opinions, unless your question asks for others opinions, and to look for what researchers or well-known people within that topic says, and to not get any information from “who-knows-who-typed-it” websites, such as ask.com, etc.

hope this helps

[ad_2]

Categories
Assignment Help

Which of the following is a nonrenewable resource? A.) solar energy B.) fossil fuels C.) geothermal energy D.) nuclear energy

[ad_1]

Natural Forces Affecting the Driver:

1. While the car stops, the person continues moving the way that the car were moving and then hits the obstacle in the car or the person can be thrown out of the vehicle. If the person wears belt, he will stop moving with the vehicle and won’t hit the obstacle.

2. We count approximate kinetic energy using the formula K = v^2. So the vehicle which is moving at 30 mph will have four times less kinetic energy than vehicle which is moving at 60 mph. If they have the same road conditions, the breaking distance will be four times as great for the car moving twice as fast.

3. Kinetic energy depends on object’s mass and velocity and it has direct relationship with the stopping distance. The lesser mass of the vehicle = the lesser kinetic energy and lesser stopping distance. => If both vehicles have the same velocity, then small vehicle has lesser kinetic energy than large vehicle.

4. We know that kinetic energy has this relationship with velocity K = v^2. So the best way to prepare to enter sharp curves in the roadway is to lower the speed. The most appropriate speed is 20-30 mph, but it depends on road conditions and car’s breaks condition.

5. Car crashes can happen with everyone so the best way is to be prepared. First the driver should wear a seatbelt while he’s driving. He should check his tires and breaks condition regularly. And also it’s important to slow down the vehicle while entering sharp curves. Without following these rules, the driver can get catastrophic injuries in a car crash.

Signs, Signals, and Pavement Markings: 

1. It doesn’t matter where you go. All you need is to learn highway code. It’s very different to know the meanings of every road sign. Also, it’s necessary to check your car’s conditions and you should take some spare parts for your car in case of accidents. So wherever you go, it’s important to be prepared.

2. You should stop before crossing and take few minutes to make sure there is no train approaching. If there is no train approaching, you can pass a railroad crossing. If you see approaching train, you should wait until it will pass a railroad crossing.

3. You should stop before the lights and wait to check the traffic movement and signs. Make sure that everything is safe and pass the intersection. Don’t move fast to avoid accidents.

4. Flashing yellow light means that it’s not necessary to stop but you should to pay attention on the traffic movement. So it would be better to yield before the lights and make sure if it’s safe to move. After that you can cross the intersection.

5. The line change means that the lane changes and you can’t cross solid lines. Pay more attention on road marking because it shows how you should behave on the road or highway.

6. As you approach the next exit and  your passengers need to use the restroom and get some food, you should look for green signs which indicate food and rest stops. You should to slow down if you don’t want to skip the sign.

7. When you take the exit ramp off the expressway and merge onto the next road, you see yellow lines dividing the roadway which indicates that there is oncoming traffic and this is a two-way highway. 

[ad_2]

Categories
Assignment Help

How do fossil fuels form? a.decomposers remove fossil fuels from dead plants. b.bacteria fix carbon into fossil fuels. c.plants release fossil fuels in photosynthesis. d.dead organisms are compressed by dirt?

[ad_1]

How do fossil fuels form? a.decomposers remove fossil fuels from dead plants. b.bacteria fix carbon into fossil fuels. c.plants release fossil fuels in photosynthesis. d.dead organisms are compressed by dirt?

[ad_2]

Categories
Assignment Help

Match the term to its description. 1. deforestation 2. combustion 3. circulation 4. weathering 5. calcium carbonate a. the primary component of mollusk shells and coral skeletons b. the logging of trees, which removes producers from the carbon cycle c. the burning of fossil fuels to make energy d. the process which brings up nutrients from the deep ocean e. the wearing down of rocks over time

[ad_1]

Answer:

The integumentary system covers the surface of the body is true about the integumentry system.

Explanation:

The integumentary system includes the skin, nails, glands, hairs, and nerves. Its main role is to act as a barrier to protect the body from the outside environment. It also retains body fluids, regulates body temperature, eliminates waste products, and protects against disease.

The integumentary system is the largest organ in the body that covers the surface of the body.

Thus, The integumentary system covers the surface of the body is the true statement about the integumentry system.

[ad_2]

Categories
Assignment Help

The best fossil evidence to suggest that neandertals could produce a language like that of modern humans comes from which bone(s) collected at kebara, israel?

[ad_1]

If we make life better for ourselves, we can do the same thing, in a larger extent, to help others. 

we, as human beings, have created the pollution that exists on earth. technology also creates this pollution. as technology increases and helps people lead easier/better lives, the old technology is abandoned. look at the data for LCD screens as trash, the lead that a CRT can produce in the environment, the circuitry that is strewn throughout the dumps of the world, if they make it to the dumps, the chemical waste produced just in making more of the tecnologically better devices. 

look at recycling numbers across the country. in my town in a north eastern coastal state, recycling is very well received and can make a difference. i know people in the midwest where recycling is not even an option. recycling will only work if everyone does it. it can’t work if only a few people do it based on cost/benefit numbers. 

so, if people want to do better for everyone, they have to start with themselves and then move on to others. to paraphrase, to act globally, people need to start locally

[ad_2]

Categories
Assignment Help

Select all answers that apply. Which of the following statements depend on the relative dating of events? Amphibians evolved before land reptiles. Bony fish first evolved about 420 million years ago. The Jurassic period began 200 million years ago. Elephants appear in the fossil record after dinosaurs became extinct

[ad_1]

The correct answer is – B. Tropical climates have four distinct seasons.

The tropical climates are climates where it is summer throughout the whole year. The temperature is high and they receive large amounts of precipitation. While some receive precipitation throughout the whole year, usually in the afternoon hours, some have it seasonally, where they experience a wet season and a dry season, which are the only two seasons that appear in certain tropical climates.

Because of this, the tropical climates have the biggest diversity in both flora and fauna. The forests are thick and always green, and the animals of all sorts and sizes are in abundance.

[ad_2]

Categories
Assignment Help

Halogens are the basis of all fossil fuels. True or False?

[ad_1]

Answer: Option (A) is the correct answer.

Explanation:

When 30 g of NaCl is dissolven in 100 g of water then it means NaCl is the solute and water is the solvent.

More is the amount of solute present in a solution more concentrated the solution will be.

For example, an aqueous solution with 30.0 grams of NaCl dissolved in 100 grams of water is more concentrated than one that has 15.0 grams of NaCl dissolved in 100 grams of water.

Whereas molarity is the number of moles present in a liter of solution.

Also,    Molarity = frac{mass}{text{molar mass} times Volume}

As molar mass of NaCl is 58.44 g/mol. Therefore, assuming volume as 1 L then molarity of a solution containing 30 g of NaCl is as follows.

        Molarity = frac{mass}{text{molar mass} times Volume}

                       = frac{30 g}{58.44 g/mol times 1 L}

                       = 0.513 M

Whereas molarity of a solution containing 15 g of NaCl is as follows.

           Molarity = frac{mass}{text{molar mass} times Volume}

                       = frac{15 g}{58.44 g/mol times 1 L}

                       = 0.256 M

This shows that molarity of both the solutions is not the same.

Thus, we can conclude that the statement one that has 30.0 grams of NaCl dissolved in 100 grams of water is more concentrated than one that has 15.0 grams of NaCl dissolved in 100 grams of water, is true of an aqueous solution of sodium chloride.

[ad_2]

Categories
Assignment Help

Many important fossil discoveries have occurred in the Great Rift Valley of Africa. Describe the process that enabled these fossils to become exposed

[ad_1]

Answer: The correct answer is- The fetus is more developed than the embryo.

Embryo describes the early stage of human development that roughly corresponds to 5th to 10th week of pregnancy. It is developed from zygote ( produced when egg is fertilised by sperm) through a series of stages like blastula, gastrula, and then organogenesis.

On the other hand, fetus describes the later stage of human development that begins from the end of 10th week or beginning of 11th week of pregnancy and goes till the end of pregnancy. The various organs are fully developed during this phase.

Thus, fetus is more developed than the embryo.

[ad_2]

Categories
Assignment Help

An anthropologist finds a fossil that is 2 million years old, and it had simple tools nearby. To which species could the speciemen belong?

[ad_1]

The correct answer is (d) none of the above.

The major effects that took place in 15,000 years ago were related to modification of river system, isostactic adjustment, the levels of the sea rose, creation of million lakes, glaciers stopped advancing.These effects reshaped the entire environment which lead to the increased biodiversity. All these events took place in interglacial period that began 15,000 years ago.

[ad_2]

Categories
Assignment Help

The first organisms evolved on Earth around 4 billion years ago. The fossil record indicates that the first organisms were which of the following?

[ad_1]

The correct answer is B. Move through abiotic and biotic regions

Explanation:

The biogeochemical cycles refer to different natural cycles such as the oxygen cycle, the water cycle or the sulfur cycle that guarantee different substances and elements that are essential for life and Earth move. Indeed substances in biogeochemical cycles travel through abiotic or non-living regions such as the atmosphere or the soil but also involve biotic ones including ecosystem, animals, and plants. According to this, biogeochemical cycles move through abiotic and biotic regions.

[ad_2]

Categories
Assignment Help

Integrated pest management is defined by the Environmental Protection Agency as, “the coordinated use of pest and environmental information along with available pest control methods, including cultural, biological, genetic and chemical methods, to prevent unacceptable levels of pest damage by the most economical means, and with the least possible hazard to people, property, and the environment.” Which of the following risks does integrated pest management try to minimize? damage of a food web due to the overuse of pesticides ground water pollution, due to the illegal dumping of toxic chemicals deforestation, due to acid rain global warming, or due to an increased use of fossil fuels

[ad_1]

Abiotic factors
Abiotic factors are the physical and chemical conditions of an environment. For example : heat, salinity, pressure, light, wind, pH …

Biotic factors
Biotic factors are all the biological conditions of an environment for a specie/taxa. It can include prey and predator abundance, available food amount, available space, intra and interspecific competition…

The development of organims is under the control of abiotic factors. Some are adapted to heat, cold etc … The abiotic factors will define which organisms are able or not to live in a specified place.

The living organisms will constitute the biotic factors, which define if and how can an organism live in a specified environment.

[ad_2]

Categories
Assignment Help

In which calculation would the use of the mass-energy equivalence principle be needed? A. energy obtained from the burning of fossil fuels B. energy given off by a current flowing through a wire C. energy created by the conversion of mass of a uranium sample D. mass of coal burned in order to provide the energy needed for a large city

[ad_1]

In evolutionary biology, mimicry is a similarity of one organism, usually an animal, to another that has evolved because the resemblance is selectively favoured by the behaviour of a shared signal receiver that can respond to both.[1] Mimicry may evolve between different species, or between individuals of the same species. Often, mimicry evolves to protect a species from predators, making it an antipredator adaptation.[2] The resemblances that evolve in mimicry can be in appearance, behaviour, sound or scent. Mimicry may be to the advantage of both organisms that share a resemblance, in which case it is a mutualism, or mimicry can be to the detriment of one, making it parasitic or competitive. Mimicry occurs when a group of organisms,[a] the mimics, evolve to share perceived characteristics with another group, the models. The evolutionary convergence between groups is driven by the selective action of a signal-receiver or dupe.[3] Birds, for example, use sight to identify palatable insects, whilst avoiding the noxious ones. Over time, palatable insects may evolve to resemble noxious ones, making them mimics and the noxious ones models. In the case of mutualism, sometimes both groups are referred to as “co-mimics”. It is often thought that models must be more abundant than mimics, but this is not always so.[4] Mimicry may involve numerous species; many harmless species such as hoverflies are Batesian mimics of strongly defended species such as wasps, while many such well-defended species form Mullerian mimicry rings, all resembling each other. Mimicry between prey species and their predators often involves three or more species.[5]

In its broadest definition, mimicry can include non-living models. The specific terms masquerade and mimesis are sometimes used when the models are inanimate.[6][7][8] For example, animals such as flower mantises, planthoppers and geometer moth caterpillars resemble twigs, bark, leaves or flowers.[7][4][9] Many animals bear eyespots, which are hypothesized to resemble the eyes of larger animals. They may not resemble any specific organism’s eyes, and whether or not animals respond to them as eyes is also unclear.[10] Nonetheless, eyespots are the subject of a rich contemporary literature.[11][12][13] The model is usually another species, except in automimicry, where members of the species mimic other members, or other parts of their own bodies, and in inter-sexual mimicry, where members of one sex mimic members of the other.[4]

Mimesis in Ctenomorphodes chronus, camouflaged as a eucalyptus twig

Though visual mimicry through animal coloration is most obvious to humans, other senses such as olfaction (smell) or hearing may be involved, and more than one type of signal may be employed.[7][5] Mimicry may involve morphology, behaviour, and other properties. In any case, the mimetic signal always functions because it resembles that of another organism. In evolutionary terms, this phenomenon is a form of co-evolution. It can involve an evolutionary arms race if mimicry negatively affects the model, and the model can evolve a different appearance from the mimic.[4]p161 Mimicry should not be confused with other forms of convergent evolution, which occurs when species come to resemble each other by adapting to similar lifestyles that have nothing to do with a common signal receiver. Mimics may have different models for different life cycle stages, or they may be polymorphic, with different individuals imitating different models. Models themselves may have more than one mimic, though frequency dependent selection favours mimicry where models outnumber mimics. Models tend to be relatively closely related organisms,[14] but mimicry of vastly different species is also known. Most known mimics are insects,[7] though many other animal mimics are known. Plants and fungi may also be mimics, though less research has been carried out in this area.[15][16][17]

[ad_2]