Which of the following are true regarding ores?
I. Ores can be metallic.
II. Ores can be nonmetallic.
III. Ores consist of minerals.
IV. Materials removed from ores are useful.
A. I, II, III, and IV
ОВ.
II, III, and IV only
C. I, III, and IV only
D. I, II, and Ill only

Answers

Answer 1

Answer: its B: I, II, III, and IV

Explanation: i took the K12 test


Related Questions

Describe how an enzyme speeds up a chemical reaction within a cell. (written answer)

Answers

Answer:

Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.

An enzyme is a form of biological catalyst. This means that as the enzymes breaks down the detritus within the cells, this speeds up the chemical reactions within.


why organisms need specialised cells and tissues in order to survive

Answers

why organisms need specialized cells and tissues in order to survive;

the cells get oxygen and nutrients from this extracellular fluid and release waste products into it. Humans and other complex organisms have specialized systems that maintain the internal environment, keeping it steady and able to provide for the needs of the cells.

systems of specialized cells within organisms help them perform the essential functions of life, which involve chemical reactions that take place between different types of molecules, such as water, proteins, carbohydrates, lipids, and nucleic acids. All cells contain genetic information in the form of DNA molecules.

Multicellular organisms require cells to perform various functions and collaborate to maintain a balance in the system known as homeostasis. As a result, specialized structures become specialized for specific functions.

What is cell specialization?

Cell specialization, also recognized as cell differentiation, is the methodology by which formulaic cells transform into specific cells that perform specific functions within the body.

Cell specialization is especially important during embryonic development.

Cell specialization allows multicellular organisms to express fewer genes in individual cells, protecting genes from mutagen damage.

Cell specialization occurs primarily during embryonic development as a result of cell signaling of cytoplasmic determinants.

Adult stem cells become specialized to various types of stem cells primarily due to gene expression regulation.

Cells in multicellular organisms must perform a variety of functions and collaborate to maintain a balance in the system known as homeostasis. As a result, specialized structures evolve to perform specific functions.

Thus, the organisms need specialized cells and tissues in order to survive.

For more details regarding cell specialization, visit:

https://brainly.com/question/12683466

#SPJ2

You have a friend who became stranded in a blizzard without food for
several weeks. This friend, when rescued, had lost about 7 kg (about 15
Ibs). As he was quite healthy to begin with, he assumed the weight he
lost was stored fat, but he wondered where the fat had gone, How did
the fat leave his body?

Answers

The fat didn't really leave his body. Fat was converted to glucose in the gluconeogenesis pathway to give him energy during the period of starvation.

Fat is stored in the body in the adipose tissue. Fat plays so many roles in the body such as;

Protection of vital organsInsulating the body from coldServing as an energy store

In times of starvation, fact could also be broken down to release energy. This occurs when fat is broken down to glycerol and fatty acids. When this occurs, glycerol goes to the liver where it is converted to glucose in the gluconeogenesis pathway. This helps to produce energy in times of starvation thereby depleting the body's fat reserve.

As this process occurs, the fat reserve in my friend's body kept going down resulting in his loss of about 15  Ibs of weight.

Learn more: https://brainly.com/question/15362685

list the main uses of bacteria​

Answers

The three main uses of bacteria are:

1. Lactobacillus, a genus of Gram-positive helps in converting milk into curd
2. Bacteria are used in brewing and baking and other fermentation processes.
3. Bacteria are also used as pesticides and in composting processes in agriculture, while some species of bacteria play a key role in nitrogen fixation.

what do you think will happen when i put a leaf discs saturated with a sodium bicarbonate solution and put it under a lamp ? will it sink or float and why ? can someone help me rq will give 30 points

Answers

Answer:

the leaf disk should float because bicarbonate is the source of its oxygen  for photosynthesis and it releases oxygen into the interior of the disk causing it to float.

Explanation:

The thing which would happen if leaf discs are saturated with a sodium bicarbonate solution and put under a lamp is:

The leaf disk would float

According to the given question, we can see that there is an experiment which is taking place as a leaf disc is placed in a solution of sodium bicarbonate under a lamp.

As a result of this, we can see that the source of oxygen for the leaf disk is the bicarbonate and when the chlorophyll in the plant reaches out to the lamp for photosynthesis, it would make the leaf disk to float.

Read more here:

https://brainly.com/question/9814017

Marine biologists have determined that when a shark detects the presence of blood in the water, it will swim in the direction in which the concentration of the blood increases most rapidly. Based on tests conducted by the biologists, the concentration of blood (in parts per million) at a point P(x,y,z) on the surface of sea water is approximated by

Answers

Blood concentration is approximated by the distance from the source.

The concentration of blood at a point P(x,y,z) on the surface of sea water is approximated by the distance from the source where the blood moves. Point x is the place where the concentration of the blood is the highest because at this point the source of blood present.

At point y, the concentration of the blood is lower as compared to point x but higher than point z, while on the other hand, at point z the concentration of blood is the lowest due to its presence farther from the source so we can conclude that blood concentration is approximated by the distance from the source.

Learn more: https://brainly.com/question/25123362

Which groups contain both primary and secondary consumers?

Answers

Answer:

Group B

Explanation:

because it the primary consumers eat fruits and seeds and the secondary consumers eat insects

The image shows a vehicle that can help manage resources sustainably.
What is one disadvantage of using this kind of vehicle?
HYBRID
A. It is more environmentally friendly than gasoline-powered vehicles.
B. It can cost more than gasoline-powered vehicles.
c. It emits more greenhouse gases than gasoline-powered vehicles.
O D. It uses up more fossil fuels than gasoline-powered vehicles.

Answers

Answer: B

I chose B because hybrid vehicles tend to be more expensive than their gasoline-powered counterparts. I determined that A is an advantage and not a disadvantage, and I determined that C and D don't make sense if the vehicle can manage resources sustainably.

Which two body systems work closely together to make sure your body remains in a stable condition

Answers

Circulatory systemRespiratory system.

The Circulatory system helps in providing impure blood to heart and taking pure blood to cells with hemoglobin.

The respiratory system handles the coming of oxygen to body and out of carbon dioxide from body

What was the health of the ecosystem of Atlas National Park like before wolves were reintroduced?

Answers

Answer:

The reintroduction of wolves led to a trophic cascade that increased the biodiversity of woody species by controlling the elk population. It also increased the health of riparian zones, subsequently increasing the biodiversity of the birds and mammals that live there.

Using ___ is one way of planting where a seed is allowed to germinate in box or boxes before planting the soil.

Answers

Answer:

Plantig seeds

Explanation:

The answer is “Planting seeds”.

9. Since the aphotic zone does not receive enough sunlight for photosynthesis, plankton are not present.
What is basis of the food chain here?

Answers

Answer:

The answer is  detritus.

Explanation:

How does doing work on an object change its energy?

Answers

Answer:

WHEN WORK ISS DONE ON A OBJECT, ENERGY IS ADDED TORDS IT.

Explanation:

.

.

.

5 organelle cells not found in human cells

Hurry homework due in couple minutes

Answers

Answer:

Not every cell in the human body contains DNA bundled in a cell nucleus. Specifically, mature red blood cells and cornified cells in the skin, hair, and nails contain no nucleus. Mature hair cells do not contain any nuclear DNA. ... As part of the maturation process, human red blood cells destroy their cell nuclei.

This means they have no mitochondria, Golgi apparatus, or endoplasmic reticulum. They also lack a membrane-bound nucleus, although they do have genetic material located in a nucleoid region. Prokaryotic cells are surrounded by a plasma membrane, and some types of bacteria have cell walls as well.

Nucleolus. Within the nucleus is a small subspace known as the nucleolus. It is not bound by a membrane, so it is not an organelle. This space forms near the part of DNA with instructions for making ribosomes, the molecules responsible for making proteins.

Explanation:

Which of the following is an example of a protein?

Group of answer choices

hormones and fats

enzymes and antibodies

RNA and DNA

starch and glucose

Answers

Answer:

RNA And DNA

Explanation:

because it gives protein as ew need

Consider the following bones: femur, humerus, sternum, scapula, and rib. Which of these bones are flat?

Answers

Answer:

The ribs

Explanation:

The long ones are big and the flat bones like the ribs are mostly curved

The structure that carries urine into the renal pelvis

A. Loop of henle
B. Collecting duct
C. Renal cortex
D. Renal vein

Answers

Answer:

collecting duct

Explanation:

The last part of a long, twisting tube that collects urine from the nephrons (cellular structures in the kidney that filter blood and form urine) and moves it into the renal pelvis and ureters.

I hope this is correct the other ones didn't quite match up.

which of the following pairs of populations is most likely to increase and decrease in similar pattern to wolves and moose?

Answers

Answer:

moose?

Explanation:

so sorry if it's wrong

Question 7
The
muscle raises your eyebrows and wrinkles the skin of your forehead.
O occipitalis
O buccinators
frontalis
O zygomaticus
Previous

Answers

Answer:

What is the  occipitalis muscles

Explanation:

Good luck

Explain how a rise in temperature may increase the rate of an enzyme controlled reaction​

Answers

Answer:An increase in temperature increases kinetic energy of particles, so collision frequency increases and more enzyme-substrate complexes are formed, therefore rate of reaction increases.

Explanation: i no it

HURRRRRRRRRRRRRYYYYYYYYYYYYYYYYYYYYYYYYYYYY

Answers

Answer:

the answer would be 3 and 4 hope this helps please mark me as brainlyist if right

Explanation:

nguyên lí hoạt động của hệ vận động

Answers

Answer:

I can't understand the language text in English and with your language name I reply that

Explanation:

Wind turbines work on a very simple priciple: the wind turns the blades, which causes the axis to rotate, which is attached to a generator, which produces DC electricity, which is then converted to AC via an inverter that can be passed on to power your home.

5.202/0.45

please explain out how to get the answer

Answers

Answer:

use a calculator I'm a genius

Explanation:

do you mean you don't know how to figure out the question? or you don't know how to divide decimals

Answer:

11.56

Explanation:

         

        ___11.56

450 | 5202.00

       -450

           702

        -450

          2520

         -2250

            2700

           -2700

                    0

What categories are lymphocytes classified into? (Choose all that apply)
B cells
A cells
NK cells
T cells

Answers

Answer: A Cells & NK Cells

Explanation: Well, the A Cells are a mass of cytoplasm that is bound externally by a cell membrane, and NK Cells are innate immune cells.

Answers confirmed by Buzz (Acceleration Education)

Hope this helps! & Please Give Me Brainliest that would help me a lot.

Lymphocytes classified into:-

B cellsNK cellsT cells

What are the function of lymphocytes?B-cells are stimulated by an antigen, they proliferate and transform into plasma cells, which produce specific antibodies.T cells includes delayed hypersentivity reactions.It help in graft rejection, graft-versus-host reactions, defense against intracellular organisms, and probably defense against neoplasms.

What are lymphocytes?A lymphocyte is a type of white blood cell in the immune system of most vertebrates. Lymphocytes include natural killer cells, T cells, and B cells. They are the main type of cell found in lymph, which prompted the name lymphocyte.

To know more about lymphocytes here

https://brainly.com/question/1271207

#SPJ2

Looking for input and other opinions with the following statement. 'environmental factors influence the rate of natural selection." I am to make a claim on whether I agree or not and why. I agree with the statement. This is because all literature states that with natural selection it's basically the best man/woman wins. I feel that with that statement it directly refers to the environment if food is scarce then the best hunter the best runner is going to get the food first if the weather is changing and it's time to move on or hibernate then the one with the best intuitions will move on or assume hibernation and wont be left to the cold as well as if they are the prey to something else as everything is the best one to keep alert and observant to their surrounding would be the one to survive longer. Although I think that the only downfall to that would be if something happened and the appearance was to change and made them less desirable in that manner but then would in turn help themselves to camouflage to hide better.

Answers

I agree completely.

Environmental factors control evolution through surivial of the fittest, or natural selection. This is not nearly as much the case with humans as wild animals, or early on humans, but it does still come into play. For example, lactose intolerance was erradicated in areas where milk was a primary source of nutrients during a famine. The famine was environmental, causing natural selection to elimate lactose intolerant people in the area.

A more basic example is fur color of certain animals. They were selected by their environment to survive and pass on their genetics, causing the species to evolve.

30 POINTS In what ways can the use of statistics help in improving mental health services? Could the use of statistics cause potential misunderstandings of mental health services? How can you avoid any such misunderstandings?

Answers

In what ways can the use of statistics help in improving mental health services? Could the use of statistics cause potential misunderstandings of mental health services? How can you avoid any such misunderstandings?

Myths, misunderstandings, and negative stereotypes and attitudes surround mental illness. These result in stigma, discrimination,and isolation of people with mental illness, as well as their families and carers.

----------------------------------------------------------------------------------------------------------------

Are mental illnesses a form of intellectual disability or brain damage?

No. They are illnesses just like any other, such as heart disease, diabetes, and asthma. Yet the traditions of sympathy, support, and flowers given to people with physical illnesses are often denied to those with a mental illness.

Are mental illnesses incurable and lifelong?

No. When treated appropriately and early, many people recover fully and have no further episodes of illness.

For others, mental illness may recur throughout their lives and require ongoing treatment. This is the same as many physical illnesses, such as diabetes and heart disease. Like these other long-term health conditions, mental illness can be managed so that individuals live life to the fullest.

Although some people become disabled as a result of ongoing mental illness, many who experience even very major episodes of illness live full and productive lives.

Are people born with a mental illness?

No. A vulnerability to some mental illnesses, such as bipolar mood disorder,can run in families. But other people develop mental illness with no family history.

Many factors contribute to the onset of a mental illness. These include stress, bereavement, relationship breakdown, physical and sexual abuse, unemployment,social isolation, and major physical illness or disability. Our understanding of the causes of mental illness is growing.

Can anyone develop a mental illness?

Yes. In fact, as many as one in five Australians may develop a mental illness at some stage in their lives. Everyone is vulnerable to mental health problems.

Many people feel more comfortable with the notion of having 'a nervous breakdown' rather than a mental illness. However, it is important to talk openly about mental illness, as this reduces the stigma and helps people to seek early treatment.

Are people with mental illness usually dangerous?

No. This false perception underlies some of the most damaging stereotypes. People with a mental illness are seldom dangerous. Even people with the most severe mental illness are rarely dangerous when receiving appropriate treatment and support.

Should people with a mental illness be isolated from the community?

No. Most people with a mental illness recover quickly and do not even need hospital care. Others have short admissions to hospital for treatment. Improvements in treatment over recent decades mean that most people live in their communities, and there is no need for the confinement and isolation that was commonly used in the past.

A very small number of people with mental illness need hospital care,sometimes against their will. Improvements in treatment are making this less and less common, and fewer than one in a 1000 people are treated this way.

What is a nonrenewable resource?(1 point)

a resource that is in limited supply


a resource that is used for energy


a resource that harms the environment when it is used


a resource that can replace itself quickly

Are all rocks made up of one mineral?(1 point)

No. If it contains more minerals, however, then it is not useful to people.


Yes. If it contains more minerals, then it would lose its orderly internal structure.


No. Some rocks may contain several minerals.


Yes. If it contains more minerals, then it is an ore.


Coal is a very useful rock that formed over millions of years from the remains of plants. Is coal a mineral?(1 point)

No, coal is not a mineral because coal is made of dead plants.


No, coal is not a mineral because coal can be burned to produce electricity and heat.


Yes, coal is a mineral because all rocks that are useful to people are minerals.


Yes, coal is a mineral because all rocks are nonliving solid minerals.

Which is a positive aspect of fossil fuels?(1 point)

They are ecologically friendly.
.

They can be recycled and reused.


They provide energy for cars, trains, and heat.


They do not need processing to produce energy.

Which is a negative aspect of fossil fuels?(1 point)

They take a long time to produce energy.


They are difficult to find.


They cause pollution on Earth.


They are difficult to transport.

Which is a disadvantage of solar power?(1 point)

It requires turbines.


It can be harmful to wildlife.


It requires burning fuel, which causes air pollution.


It can only be used where there is lots of sunlight.

Which is a thick, sticky, tar-like deposit of bitumen mixed into sandy sediment?(1 point)

shale


sandstone


oil sand


coal

Which statement best explains an environmental outcome of using fossil fuels for energy?(1 point)

When fossil fuels are burned, hazardous ash is created and carried through the environment by wind and dropped into nearby lakes and ponds.


Fossils fuels produce waste that exposes humans to dangerous levels of radiation.

When fossil fuels are burned, they release toxic gases into the air that cause pollution and increase global warming.


Fossil fuels release carbon dioxide which plants use to make food.


Why is soil considered a vital resource?(1 point)

It is hard to destroy and easy to make.


It provides the source of material for different landforms.

It plays a variety of roles for plants and animals.


It is the place where all nutrients on Earth are stored.


Which describes a renewable energy resource?(1 point)

It is more prone to serious accidents.

It is less expensive than fossil fuels.


It produces less pollutants than fossil fuels.

It consists of carbon and hydrogen molecules.

Use the scenario to answer the question.

Edwin buys a water bottle, reuses it twice, and then recycles it. Eleanor buys a water bottle, reuses it twelve times, and then throws it away.

Which energy cost would apply to Edwin, but not to Eleanor?

(1 point)

the cost of transporting the bottle away from the house


the cost of processing the bottle after it was no longer used


the cost of producing the original bottle


the cost of transporting the bottle to the store



Your class goes on a field trip to observe drilling machinery. The geologists at the drill site show you displays of drilled rocks to compare different types of drills and methods. The drilled holes in one rock display are significantly larger than the holes drilled in the display next to it. Given this information, which statement is correct? (1 point)

The rock display with larger holes shows petroleum drilling, which is deep underground.


The rock display with smaller holes shows petroleum drilling, which is closer to the surface.


The rock display with smaller holes shows copper drilling, which is deep underground.


The rock display with larger holes shows copper drilling, which is closer to the surface.

Answers

Answer:1).A nonrenewable resource is a natural substance that is not replenished with the speed at which it is consumed. It is a finite resource.

2)Rocks are made of minerals, like quartz, calcite, feldspars, and micas. Most rocks are made from more than one mineral, but there are quite a few kinds that are made from only one mineral. Minerals are not rocks, rocks are made of minerals.

3)Coal is a very useful rock that formed over millions of years from the ... No, coal is not a mineral because coal is made of dead plants.

4)The relatively cheap cost of fossil fuels is a major positive aspect. They are in abundant supply, which makes them inexpensive to drill or mine for. In particular, coal is one of the most widely available fossil fuels.

5)High initial costs for material and installation and long ROI (however, with the reduction in the cost of solar over the last 10 years, solar is becoming more cost feasible every day) Needs lots of space as efficiency is not 100% yet. No solar power at night so there is a need for a large battery bank.

6)Asphalt, also known as bitumen is a sticky, black, highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or it may not.

7)When fossil fuels are burned, they release toxic gases into the air that cause pollution and increase global warming.

8)The soil considered an important resources because : It provides food through agriculture. It is the source of nutrients for many forms of life. Many valuable minerals are explored from the soil.

9)Renewable resources are an energy source that cannot be depleted and are able to supply a continuous source of clean energy.

10)the cost of processing the bottle after it was no longer used

11)The rock display with smaller holes shows copper drilling, which is deep underground.

Explanation:

Those resources which can not be made again is called nonrenewable resource.

According to the question,

A resource that is in limited supply is nonrenewable resources.A resource that is used for energy is a renewable resource. For example - sunlight.A resource that harms the environment when it is used, might be both renewable and nonrenewable resources.A resource that can replace itself quickly is renewable resources. Asphalt, also known as bitumen is sticky, it is present in all rock7When fossil fuels are burned, they release toxic gases into the air that cause pollution and increase global warming. The soil considered an important resource because It provides food through agriculture. It is the source of nutrients for many forms of life. Many valuable minerals are explored from the soil. Renewable resources are energy sources that cannot be depleted and are able to supply a continuous source of clean energy. The cost of processing the bottle after it was no longer used The rock display with smaller holes shows copper drilling, which is deep underground.

For more information, refer to the link:-

https://brainly.com/question/19930528

which planet is blue-green in colour?​

Answers

Answer:

Uranus

Explanation:

The blue-green color results from the absorption of red light by methane gas in Uranus' deep, cold and remarkably clear atmosphere.

Uranus is the planet you are looking for.

Animals and plants have certain features which make them to survive in a particular habitat. This is called(a) adaptation (b) speciation (c) specialisation (d) evolution ​

Answers

Answer:

Adaptation

Explanation:

The presence of specific features, which enable a plant or an animal to live in a particular habitat, is called adaptation.

Animals and plants have certain features which make them to survive in a particular habitat. This is called(a) adaptation (b) speciation (c) specialisation (d) evolution

it's A. adaptation

when animals adapted environment they can survive

hope it helps

How much of Earth is covered in water?

A 50%

B 75%

C 25%

D. 25%​

Answers

Answer:

B. 75%

Hope this helps Have a nice day

Answer:

B 75%

Explanation:

In simplest terms, water makes up about 71% of the Earth's surface, while the other 29% consists of continents and islands.

B is your best answer

Other Questions
Why did people refer to Washington as "the American Cincinnatus"?He preferred fighting to farming.He deeply cared for his troops.He was a diplomat and a soldier.He was a selfless leader. the cost of plastering the wall of a room which is 4m high and breadth is one third of its length is Rs 640 at the rate of Rs 5/ meter square. What will be the cost of carpeting its floor at rate of rs 250/ meter square. what was the importance of the pharaoh in ancient Egyptians practices which food items need extra caution around allergies? Will mark brainliest for correct answer !!! Which of the seven basic archetypal plots fits with the novel Hatchet in this passage the most?1. Overcoming the Monster.2. Rags to Riches.3. The Quest.4. Voyage and Return.5. Comedy.6. Tragedy.7. Rebirth. x-10 Select all of the following that are part of the Central Nervous System CerebellumSciatic NerveCerebrumParietal LobeBrachial PlexusPonsMotor Cortex The study of rock layers that is part of geology is known as 1.Layerology2.Stratigraphy3.Sedimentraphy4.Paleontology Which statement is true of persuasive writing in an academic context? a.) It presents research without any interpretation, so that the reader can determine what it means. b.) Its primary goal is to tell a detailed personal story. c.) It can include elements of narrative and expository writing, while taking a clear position on a topic. d.) It explains opposing perspectives on a topic without taking a position. Anyone know this? .......... Combine the like terms to create an equivalent expression:2k(5)+1 based on the map, what conclusion can you draw about ancient civilizations Factor completely 3xy - 3x 2y + 2 Mr. Ramirez purchased 50 concert tickets for a total of $575. The concert tickets cost $15 for adults and $10 for children under the age of 12. Write and solve a system of equations to represent the given scenario. Use the variables "a" for adults and "c" for children. Qun l cng trnh v an ton lao ng which compound has the highest free energy and produces the most atp per molecule when oxidized? 5 ways humans can protect themselves from the Suns UV harmful Sarah is preparing for the baptism of Chris. He bought five dressed chicken weighing 1 3/4, 2 1/8, 1 1/3,1 2/5, and 2 1/2 kilograms each, respectively.What is the total weight of the chicken? a) Identify details in the passage that relate toheat and cold. Note other details related to lightand dark. (b) Connect: Explain how each set ofimages captures the physical realities of Tom'sactions. (c) Analyze: In what ways might each setof images also be symbolic